fix(es/minifier): Do not reuse identifier used for import bindings (#7639)

**Related issue:**

 - Closes #7634.

Author: kdy1

crates/swc/tests/fixture/issues-2xxx/2717/output/index.ts

@@ -1,24 +1,24 @@
 import { _ as e } from "@swc/helpers/_/_ts_generator";
 import { takeLatest as t, select as r } from "redux-saga/effects";
 import { CHANGE_THEME as o, CHANGE_THEME_CUSTOM_PALETTE as s, CHANGE_THEME_SWITCH_MODE as a } from "core/actions/changeTheme";
-export var selectThemeObject = function(e) {
-    return e.theme;
+export var selectThemeObject = function(n) {
+    return n.theme;
 };
-export function saveTheme(t) {
-    var o, s, n;
+export function saveTheme(n) {
+    var c, i, m;
     return e(this, function(e) {
         switch(e.label){
             case 0:
-                return o = t.type, [
+                return c = n.type, [
                     4,
                     r(selectThemeObject)
                 ];
             case 1:
-                return s = e.sent(), window.localStorage.setItem("theme", JSON.stringify({
-                    theme: s.theme,
-                    mode: s.mode,
-                    palette: s.palette
-                })), o === a && (n = window.document.querySelector("body")) && (n.classList.add("light" === s.mode ? "light" : "dark"), n.classList.remove("light" === s.mode ? "dark" : "light")), [
+                return i = e.sent(), window.localStorage.setItem("theme", JSON.stringify({
+                    theme: i.theme,
+                    mode: i.mode,
+                    palette: i.palette
+                })), c === a && (m = window.document.querySelector("body")) && (m.classList.add("light" === i.mode ? "light" : "dark"), m.classList.remove("light" === i.mode ? "dark" : "light")), [
                     2
                 ];
         }

crates/swc/tests/fixture/issues-7xxx/7546/output/1.js

@@ -1,12 +1,12 @@
 import { _ as _inherits } from "@swc/helpers/_/_inherits";
 import { ClassName } from "./some-file";
 export default {
-    field: /*#__PURE__*/ function(ClassName) {
+    field: /*#__PURE__*/ function(ClassName1) {
         "use strict";
-        _inherits(ClassName1, ClassName);
-        function ClassName1() {
-            return ClassName.call(this);
+        _inherits(ClassName2, ClassName1);
+        function ClassName2() {
+            return ClassName1.call(this);
         }
-        return ClassName1;
+        return ClassName2;
     }(ClassName)
 };

crates/swc/tests/fixture/sourcemap/003/output/index.js

@@ -25,9 +25,9 @@ import { _ as _class_call_check } from "@swc/helpers/_/_class_call_check";
 import { _ as _inherits } from "@swc/helpers/_/_inherits";
 import { _ as _create_super } from "@swc/helpers/_/_create_super";
 import { Foo } from "./Foo.js";
-var Bar = /*#__PURE__*/ function(Foo) {
+var Bar = /*#__PURE__*/ function(Foo1) {
     "use strict";
-    _inherits(Bar, Foo);
+    _inherits(Bar, Foo1);
     var _super = _create_super(Bar);
     function Bar() {
         _class_call_check(this, Bar);

crates/swc/tests/tsc-references/jsDeclarationsClassStatic2.1.normal.js

@@ -22,9 +22,9 @@ import { _ as _class_call_check } from "@swc/helpers/_/_class_call_check";
 import { _ as _inherits } from "@swc/helpers/_/_inherits";
 import { _ as _create_super } from "@swc/helpers/_/_create_super";
 import { Foo } from "./Foo.js";
-(function(Foo) {
+(function(Foo1) {
     "use strict";
-    _inherits(Bar, Foo);
+    _inherits(Bar, Foo1);
     var _super = _create_super(Bar);
     function Bar() {
         return _class_call_check(this, Bar), _super.apply(this, arguments);

crates/swc/tests/tsc-references/jsDeclarationsClassStatic2.2.minified.js

@@ -21,9 +21,9 @@ import { _ as _class_call_check } from "@swc/helpers/_/_class_call_check";
 import { _ as _inherits } from "@swc/helpers/_/_inherits";
 import { _ as _create_super } from "@swc/helpers/_/_create_super";
 import Fab from "./index3";
-var Bar = /*#__PURE__*/ function(Fab) {
+var Bar = /*#__PURE__*/ function(Fab1) {
     "use strict";
-    _inherits(Bar, Fab);
+    _inherits(Bar, Fab1);
     var _super = _create_super(Bar);
     function Bar() {
         _class_call_check(this, Bar);

crates/swc/tests/tsc-references/jsDeclarationsDefault.1.normal.js

@@ -19,9 +19,9 @@ import { _ as _class_call_check } from "@swc/helpers/_/_class_call_check";
 import { _ as _inherits } from "@swc/helpers/_/_inherits";
 import { _ as _create_super } from "@swc/helpers/_/_create_super";
 import Fab from "./index3";
-var Bar = function(Fab) {
+var Bar = function(Fab1) {
     "use strict";
-    _inherits(Bar, Fab);
+    _inherits(Bar, Fab1);
     var _super = _create_super(Bar);
     function Bar() {
         var _this;

crates/swc/tests/tsc-references/jsDeclarationsDefault.2.minified.js

@@ -3,26 +3,26 @@ import i, { extend as h } from "./define.js";
 import { Color as e, rgbConvert as s, Rgb as r, darker as n, brighter as o } from "./color.js";
 import { deg2rad as a, rad2deg as u } from "./math.js";
 var l = -1.78277 * 0.29227 - 0.1347134789;
-export default function c(i, h, e, n) {
+export default function c(c, p, f, b) {
     return 1 == arguments.length ? function(i) {
         if (t(i, Cubehelix)) return new Cubehelix(i.h, i.s, i.l, i.opacity);
         t(i, r) || (i = s(i));
         var h = i.r / 255, e = i.g / 255, n = i.b / 255, o = (l * n + -1.7884503806 * h - 3.5172982438 * e) / (l + -1.7884503806 - 3.5172982438), a = n - o, c = -((1.97294 * (e - o) - -0.29227 * a) / 0.90649), p = Math.sqrt(c * c + a * a) / (1.97294 * o * (1 - o)), f = p ? Math.atan2(c, a) * u - 120 : NaN;
         return new Cubehelix(f < 0 ? f + 360 : f, p, o, i.opacity);
-    }(i) : new Cubehelix(i, h, e, null == n ? 1 : n);
+    }(c) : new Cubehelix(c, p, f, null == b ? 1 : b);
 }
-export function Cubehelix(t, i, h, e) {
-    this.h = +t, this.s = +i, this.l = +h, this.opacity = +e;
+export function Cubehelix(l, c, p, f) {
+    this.h = +l, this.s = +c, this.l = +p, this.opacity = +f;
 }
 i(Cubehelix, c, h(e, {
-    brighter: function(t) {
-        return t = null == t ? o : Math.pow(o, t), new Cubehelix(this.h, this.s, this.l * t, this.opacity);
+    brighter: function(l) {
+        return l = null == l ? o : Math.pow(o, l), new Cubehelix(this.h, this.s, this.l * l, this.opacity);
     },
-    darker: function(t) {
-        return t = null == t ? n : Math.pow(n, t), new Cubehelix(this.h, this.s, this.l * t, this.opacity);
+    darker: function(l) {
+        return l = null == l ? n : Math.pow(n, l), new Cubehelix(this.h, this.s, this.l * l, this.opacity);
     },
     rgb: function() {
-        var t = isNaN(this.h) ? 0 : (this.h + 120) * a, i = +this.l, h = isNaN(this.s) ? 0 : this.s * i * (1 - i), e = Math.cos(t), s = Math.sin(t);
-        return new r(255 * (i + h * (-0.14861 * e + 1.78277 * s)), 255 * (i + h * (-0.29227 * e + -0.90649 * s)), 255 * (i + h * (1.97294 * e)), this.opacity);
+        var l = isNaN(this.h) ? 0 : (this.h + 120) * a, c = +this.l, p = isNaN(this.s) ? 0 : this.s * c * (1 - c), f = Math.cos(l), b = Math.sin(l);
+        return new r(255 * (c + p * (-0.14861 * f + 1.78277 * b)), 255 * (c + p * (-0.29227 * f + -0.90649 * b)), 255 * (c + p * (1.97294 * f)), this.opacity);
     }
 }));

crates/swc/tests/vercel/full-compact/d3-color/1/output/index.js

@@ -53,18 +53,18 @@ Promise.all(assignAll).then(function() {
         return e.apply(this, arguments);
     };
 }());
-export var listOfUser = function(t) {
-    var e;
-    return new Promise((e = r(function(r, e) {
+export var listOfUser = function(e) {
+    var s;
+    return new Promise((s = r(function(r, t) {
         var s;
         return n(this, function(n) {
-            return s = 'Select Distinct id from "TABLE" Where id = \''.concat(t, "' And user_id IS not null"), postgreSQL.query(s, null, function(n, t) {
-                n ? e(n) : r(t.rows);
+            return s = 'Select Distinct id from "TABLE" Where id = \''.concat(e, "' And user_id IS not null"), postgreSQL.query(s, null, function(n, e) {
+                n ? t(n) : r(e.rows);
             }), [
                 2
             ];
         });
     }), function(r, n) {
-        return e.apply(this, arguments);
+        return s.apply(this, arguments);
     }));
 };

crates/swc/tests/vercel/full-compact/react-autosuggest/1/output/index.js

@@ -9,49 +9,49 @@ import { HIGHLIGHT_TAGS as c } from "./highlight";
 import { hasMultipleIndices as u } from "./indexUtils";
 import { version as o } from "react";
 import l from "./version";
-function d(e) {
-    "function" == typeof e.addAlgoliaAgent && (e.addAlgoliaAgent("react (".concat(o, ")")), e.addAlgoliaAgent("react-instantsearch (".concat(l, ")")));
+function d(d) {
+    "function" == typeof d.addAlgoliaAgent && (d.addAlgoliaAgent("react (".concat(o, ")")), d.addAlgoliaAgent("react-instantsearch (".concat(l, ")")));
 }
-var f = function(e) {
+var f = function(d) {
     return u({
-        ais: e.props.contextValue,
-        multiIndexContext: e.props.indexContextValue
+        ais: d.props.contextValue,
+        multiIndexContext: d.props.indexContextValue
     });
-}, m = function(e, t) {
-    return e.props.indexContextValue.targetedIndex === t;
-}, p = function(e) {
-    return !!e.props.indexId;
-}, g = function(e, t) {
-    return e.props.indexId === t;
-}, h = function(e, t) {
-    var r = p(e), a = p(t);
-    return r && !a ? -1 : !r && a ? 1 : 0;
+}, m = function(d, f) {
+    return d.props.indexContextValue.targetedIndex === f;
+}, p = function(d) {
+    return !!d.props.indexId;
+}, g = function(d, f) {
+    return d.props.indexId === f;
+}, h = function(d, f) {
+    var m = p(d), g = p(f);
+    return m && !g ? -1 : !m && g ? 1 : 0;
 };
-export default function S(u) {
-    var o, l, S = u.indexName, v = u.initialState, x = u.searchClient, _ = u.resultsState, y = u.stalledSearchDelay, w = function(e) {
-        return O.getWidgets().filter(function(e) {
+export default function S(S) {
+    var v, x, _ = S.indexName, y = S.initialState, w = S.searchClient, F = S.resultsState, V = S.stalledSearchDelay, I = function(e) {
+        return W.getWidgets().filter(function(e) {
             return !!e.getMetadata;
         }).map(function(t) {
             return t.getMetadata(e);
         });
-    }, F = function() {
-        var a = O.getWidgets().filter(function(e) {
+    }, b = function() {
+        var a = W.getWidgets().filter(function(e) {
             return !!e.getSearchParameters;
         }).filter(function(e) {
             return !f(e) && !p(e);
         }).reduce(function(e, t) {
             return t.getSearchParameters(e);
-        }, j), n = O.getWidgets().filter(function(e) {
+        }, H), n = W.getWidgets().filter(function(e) {
             return !!e.getSearchParameters;
         }).filter(function(e) {
-            var t = f(e) && m(e, S), r = p(e) && g(e, S);
+            var t = f(e) && m(e, _), r = p(e) && g(e, _);
             return t || r;
         }).sort(h).reduce(function(e, t) {
             return t.getSearchParameters(e);
-        }, a), s = O.getWidgets().filter(function(e) {
+        }, a), s = W.getWidgets().filter(function(e) {
             return !!e.getSearchParameters;
         }).filter(function(e) {
-            var t = f(e) && !m(e, S), r = p(e) && !g(e, S);
+            var t = f(e) && !m(e, _), r = p(e) && !g(e, _);
             return t || r;
         }).sort(h).reduce(function(a, n) {
             var s = f(n) ? n.props.indexContextValue.targetedIndex : n.props.indexId, i = a[s] || [];
@@ -68,49 +68,49 @@ export default function S(u) {
             mainParameters: n,
             derivedParameters: i
         };
-    }, V = function() {
-        if (!C) {
-            var e = F(R.state), t = e.mainParameters, r = e.derivedParameters;
-            R.derivedHelpers.slice().forEach(function(e) {
+    }, A = function() {
+        if (!O) {
+            var e = b(j.state), t = e.mainParameters, r = e.derivedParameters;
+            j.derivedHelpers.slice().forEach(function(e) {
                 e.detach();
             }), r.forEach(function(e) {
                 var t = e.indexId, r = e.parameters;
-                R.derive(function() {
+                j.derive(function() {
                     return r;
-                }).on("result", I({
+                }).on("result", P({
                     indexId: t
-                })).on("error", b);
-            }), R.setState(t), R.search();
+                })).on("error", R);
+            }), j.setState(t), j.search();
         }
-    }, I = function(n) {
+    }, P = function(n) {
         var s = n.indexId;
         return function(n) {
-            var i = q.getState(), c = !R.derivedHelpers.length, u = i.results ? i.results : {};
+            var i = M.getState(), c = !j.derivedHelpers.length, u = i.results ? i.results : {};
             u = !c && u.getFacetByName ? {} : u, u = c ? n.results : r(t({}, u), e({}, s, n.results));
-            var o = q.getState(), l = o.isSearchStalled;
-            R.hasPendingRequests() || (clearTimeout(N), N = null, l = !1), o.resultsFacetValues;
+            var o = M.getState(), l = o.isSearchStalled;
+            j.hasPendingRequests() || (clearTimeout(q), q = null, l = !1), o.resultsFacetValues;
             var d = a(o, [
                 "resultsFacetValues"
             ]);
-            q.setState(r(t({}, d), {
+            M.setState(r(t({}, d), {
                 results: u,
                 isSearchStalled: l,
                 searching: !1,
                 error: null
             }));
         };
-    }, b = function(e) {
-        var n = e.error, s = q.getState(), i = s.isSearchStalled;
-        R.hasPendingRequests() || (clearTimeout(N), i = !1), s.resultsFacetValues;
+    }, R = function(e) {
+        var n = e.error, s = M.getState(), i = s.isSearchStalled;
+        j.hasPendingRequests() || (clearTimeout(q), i = !1), s.resultsFacetValues;
         var c = a(s, [
             "resultsFacetValues"
         ]);
-        q.setState(r(t({}, c), {
+        M.setState(r(t({}, c), {
             isSearchStalled: i,
             error: n,
             searching: !1
         }));
-    }, A = function(a, n) {
+    }, C = function(a, n) {
         if (a.transporter) {
             a.transporter.responsesCache.set({
                 method: "search",
@@ -146,7 +146,7 @@ export default function S(u) {
                 return e.concat(t.rawResults);
             }, [])
         })));
-    }, P = function(a, n) {
+    }, N = function(a, n) {
         if (a.transporter) {
             a.transporter.responsesCache.set({
                 method: "search",
@@ -174,25 +174,25 @@ export default function S(u) {
         a.cache = r(t({}, a.cache), e({}, s, JSON.stringify({
             results: n.rawResults
         })));
-    }, R = s(x, S, t({}, c));
-    d(x), R.on("search", function() {
-        N || (N = setTimeout(function() {
-            var e = q.getState(), n = (e.resultsFacetValues, a(e, [
+    }, j = s(w, _, t({}, c));
+    d(w), j.on("search", function() {
+        q || (q = setTimeout(function() {
+            var e = M.getState(), n = (e.resultsFacetValues, a(e, [
                 "resultsFacetValues"
             ]));
-            q.setState(r(t({}, n), {
+            M.setState(r(t({}, n), {
                 isSearchStalled: !0
             }));
-        }, y));
-    }).on("result", I({
-        indexId: S
-    })).on("error", b);
-    var C = !1, N = null, j = R.state, O = i(function() {
-        var e = w(q.getState().widgets);
-        q.setState(r(t({}, q.getState()), {
+        }, V));
+    }).on("result", P({
+        indexId: _
+    })).on("error", R);
+    var O = !1, q = null, H = j.state, W = i(function() {
+        var e = I(M.getState().widgets);
+        M.setState(r(t({}, M.getState()), {
             metadata: e,
             searching: !0
-        })), V();
+        })), A();
     });
     !function(e, a) {
         if (a && (e.transporter && !e._cacheHydrated || e._useCache && "function" == typeof e.addAlgoliaAgent)) {
@@ -229,15 +229,15 @@ export default function S(u) {
                 };
             }
             if (Array.isArray(a.results)) {
-                A(e, a.results);
+                C(e, a.results);
                 return;
             }
-            P(e, a);
+            N(e, a);
         }
-    }(x, _);
-    var q = (o = {
-        widgets: void 0 === v ? {} : v,
-        metadata: _ ? _.metadata.map(function(e) {
+    }(w, F);
+    var M = (v = {
+        widgets: void 0 === y ? {} : y,
+        metadata: F ? F.metadata.map(function(e) {
             return r(t({
                 value: function() {
                     return {};
@@ -260,50 +260,50 @@ export default function S(u) {
                 })
             });
         }) : [],
-        results: _ ? Array.isArray(_.results) ? _.results.reduce(function(a, n) {
+        results: F ? Array.isArray(F.results) ? F.results.reduce(function(a, n) {
             return r(t({}, a), e({}, n._internalIndexId, new s.SearchResults(new s.SearchParameters(n.state), n.rawResults)));
-        }, {}) : new s.SearchResults(new s.SearchParameters(_.state), _.rawResults) : null,
+        }, {}) : new s.SearchResults(new s.SearchParameters(F.state), F.rawResults) : null,
         error: null,
         searching: !1,
         isSearchStalled: !0,
         searchingForFacetValues: !1
-    }, l = [], {
+    }, x = [], {
         getState: function() {
-            return o;
+            return v;
         },
         setState: function(e) {
-            o = e, l.forEach(function(e) {
+            v = e, x.forEach(function(e) {
                 return e();
             });
         },
         subscribe: function(e) {
-            return l.push(e), function() {
-                l.splice(l.indexOf(e), 1);
+            return x.push(e), function() {
+                x.splice(x.indexOf(e), 1);
             };
         }
     });
     return {
-        store: q,
-        widgetsManager: O,
+        store: M,
+        widgetsManager: W,
         getWidgetsIds: function() {
-            return q.getState().metadata.reduce(function(e, t) {
+            return M.getState().metadata.reduce(function(e, t) {
                 return void 0 !== t.id ? e.concat(t.id) : e;
             }, []);
         },
-        getSearchParameters: F,
+        getSearchParameters: b,
         onSearchForFacetValues: function(a) {
             var n = a.facetName, s = a.query, i = a.maxFacetHits;
-            q.setState(r(t({}, q.getState()), {
+            M.setState(r(t({}, M.getState()), {
                 searchingForFacetValues: !0
-            })), R.searchForFacetValues(n, s, Math.max(1, Math.min(void 0 === i ? 10 : i, 100))).then(function(a) {
+            })), j.searchForFacetValues(n, s, Math.max(1, Math.min(void 0 === i ? 10 : i, 100))).then(function(a) {
                 var i;
-                q.setState(r(t({}, q.getState()), {
+                M.setState(r(t({}, M.getState()), {
                     error: null,
                     searchingForFacetValues: !1,
-                    resultsFacetValues: r(t({}, q.getState().resultsFacetValues), (e(i = {}, n, a.facetHits), e(i, "query", s), i))
+                    resultsFacetValues: r(t({}, M.getState().resultsFacetValues), (e(i = {}, n, a.facetHits), e(i, "query", s), i))
                 }));
             }, function(e) {
-                q.setState(r(t({}, q.getState()), {
+                M.setState(r(t({}, M.getState()), {
                     searchingForFacetValues: !1,
                     error: e
                 }));
@@ -314,32 +314,32 @@ export default function S(u) {
             });
         },
         onExternalStateUpdate: function(e) {
-            var a = w(e);
-            q.setState(r(t({}, q.getState()), {
+            var a = I(e);
+            M.setState(r(t({}, M.getState()), {
                 widgets: e,
                 metadata: a,
                 searching: !0
-            })), V();
+            })), A();
         },
         transitionState: function(e) {
-            var t = q.getState().widgets;
-            return O.getWidgets().filter(function(e) {
+            var t = M.getState().widgets;
+            return W.getWidgets().filter(function(e) {
                 return !!e.transitionState;
             }).reduce(function(e, r) {
                 return r.transitionState(t, e);
             }, e);
         },
         updateClient: function(e) {
-            d(e), R.setClient(e), V();
+            d(e), j.setClient(e), A();
         },
         updateIndex: function(e) {
-            j = j.setIndex(e);
+            H = H.setIndex(e);
         },
         clearCache: function() {
-            R.clearCache(), V();
+            j.clearCache(), A();
         },
         skipSearch: function() {
-            C = !0;
+            O = !0;
         }
     };
 }

crates/swc/tests/vercel/full/d3-color/1/output/index.js

@@ -53,17 +53,17 @@ function p() {
         });
     })).apply(this, arguments);
 }
-r(function(e) {
-    if ("\uD83D\uDC93" !== e.data) try {
-        var t = JSON.parse(e.data);
-        if ("sync" === t.action || "built" === t.action) {
-            if (!t.hash) return;
-            _ = t.hash, function() {
+r(function(o) {
+    if ("\uD83D\uDC93" !== o.data) try {
+        var s = JSON.parse(o.data);
+        if ("sync" === s.action || "built" === s.action) {
+            if (!s.hash) return;
+            _ = s.hash, function() {
                 p.apply(this, arguments);
             }();
-        } else "reloadPage" === t.action && document.location.reload(!0);
-    } catch (t) {
-        console.warn("Invalid HMR message: " + e.data + "\n" + t);
+        } else "reloadPage" === s.action && document.location.reload(!0);
+    } catch (e) {
+        console.warn("Invalid HMR message: " + o.data + "\n" + e);
     }
 }), c({
     assetPrefix: s,

crates/swc/tests/vercel/full/d3-time-format/1/output/index.js

@@ -11,9 +11,9 @@ import React, { Component } from "react";
 import PropTypes from "prop-types";
 import Item from "./Item";
 import compareObjects from "./compareObjects";
-var ItemsList = /*#__PURE__*/ function(Component) {
+var ItemsList = /*#__PURE__*/ function(Component1) {
     "use strict";
-    _inherits(ItemsList, Component);
+    _inherits(ItemsList, Component1);
     var _super = _create_super(ItemsList);
     function ItemsList() {
         _class_call_check(this, ItemsList);

crates/swc/tests/vercel/full/next-31419/1/output/index.js

@@ -0,0 +1,9 @@
+import Foo from './foo.js';
+
+export const Bar = Foo;
+
+function someRecursiveFunction(value) {
+    return value.map(someRecursiveFunction);
+}
+
+export default someRecursiveFunction;

crates/swc/tests/vercel/full/react-instantsearch/2/output/index.js

@@ -0,0 +1,8 @@
+{
+    "toplevel": false,
+    "keep_classnames": false,
+    "keep_fnames": false,
+    "keep_private_props": false,
+    "ie8": false,
+    "safari10": false
+}

crates/swc/tests/vercel/full/utf8-1/output/index.js

@@ -0,0 +1,6 @@
+import o from './foo.js';
+export const Bar = o;
+function someRecursiveFunction(e) {
+    return e.map(someRecursiveFunction);
+}
+export default someRecursiveFunction;

crates/swc/tests/vercel/loader-only/react-autowhatever/1/output/index.js

@@ -0,0 +1,46 @@
+{
+    "arguments": false,
+    "arrows": true,
+    "booleans": true,
+    "booleans_as_integers": false,
+    "collapse_vars": true,
+    "comparisons": true,
+    "computed_props": true,
+    "conditionals": true,
+    "dead_code": true,
+    "directives": true,
+    "drop_console": false,
+    "drop_debugger": true,
+    "evaluate": true,
+    "expression": false,
+    "hoist_funs": false,
+    "hoist_props": true,
+    "hoist_vars": false,
+    "if_return": true,
+    "join_vars": true,
+    "keep_classnames": false,
+    "keep_fargs": true,
+    "keep_fnames": false,
+    "keep_infinity": false,
+    "loops": true,
+    "negate_iife": true,
+    "properties": true,
+    "reduce_funcs": false,
+    "reduce_vars": false,
+    "side_effects": true,
+    "switches": true,
+    "typeofs": true,
+    "unsafe": false,
+    "unsafe_arrows": false,
+    "unsafe_comps": false,
+    "unsafe_Function": false,
+    "unsafe_math": false,
+    "unsafe_symbols": false,
+    "unsafe_methods": false,
+    "unsafe_proto": false,
+    "unsafe_regexp": false,
+    "unsafe_undefined": false,
+    "unused": true,
+    "const_to_let": true,
+    "pristine_globals": true
+}

crates/swc_ecma_minifier/tests/fixture/issues/7634/1/input.js

@@ -36,7 +36,7 @@ function _setPrototypeOf(o, p) {
         return o.__proto__ = p, o;
     })(o, p);
 }
-var ItemsList = function(Component) {
+var ItemsList = function(Component1) {
     "use strict";
     var protoProps, staticProps;
     function ItemsList() {
@@ -59,7 +59,7 @@ var ItemsList = function(Component) {
                 configurable: !0
             }
         }), superClass && _setPrototypeOf(subClass, superClass);
-    }(ItemsList, Component), protoProps = [
+    }(ItemsList, Component1), protoProps = [
         {
             key: "shouldComponentUpdate",
             value: function(nextProps) {

crates/swc_ecma_minifier/tests/fixture/issues/7634/1/mangle.json

@@ -1,6 +1,6 @@
 import o from "./traditional.js";
-function t(o) {
-    return import(o);
+function t(t) {
+    return import(t);
 }
 import("module_for_side_effects.js");
 let r = import("some/module.js");

crates/swc_ecma_minifier/tests/fixture/issues/7634/1/output.js

@@ -1,6 +1,6 @@
 import o from "./traditional.js";
-function t(o) {
-    return import(o);
+function t(t) {
+    return import(t);
 }
 import("module_for_side_effects.js");
 let r = import("some/module.js");

crates/swc_ecma_minifier/tests/fixture/issues/7634/config.json

@@ -27,16 +27,18 @@ pub(super) struct Analyzer {
 }
 
 impl Analyzer {
-    fn add_decl(&mut self, id: Id, belong_to_fn_scope: bool) {
+    fn add_decl(&mut self, id: Id, belong_to_fn_scope: bool, is_import: bool) {
         if belong_to_fn_scope {
             match self.scope.kind {
                 ScopeKind::Fn => {
-                    self.scope.add_decl(&id, self.has_eval, self.top_level_mark);
+                    self.scope
+                        .add_decl(&id, self.has_eval, self.top_level_mark, is_import);
                 }
                 ScopeKind::Block => self.hoisted_vars.push(id),
             }
         } else {
-            self.scope.add_decl(&id, self.has_eval, self.top_level_mark);
+            self.scope
+                .add_decl(&id, self.has_eval, self.top_level_mark, is_import);
         }
     }
 
@@ -77,7 +79,7 @@ impl Analyzer {
                     ScopeKind::Fn => {
                         v.hoisted_vars
                             .into_iter()
-                            .for_each(|id| self.add_decl(id, true));
+                            .for_each(|id| self.add_decl(id, true, false));
                     }
                     ScopeKind::Block => {
                         self.hoisted_vars.extend(v.hoisted_vars);
@@ -127,7 +129,7 @@ impl Visit for Analyzer {
         p.visit_children_with(self);
 
         if self.is_pat_decl {
-            self.add_decl(p.key.to_id(), self.var_belong_to_fn_scope)
+            self.add_decl(p.key.to_id(), self.var_belong_to_fn_scope, false)
         } else {
             self.add_usage(p.key.to_id())
         }
@@ -186,15 +188,15 @@ impl Visit for Analyzer {
     }
 
     fn visit_class_decl(&mut self, c: &ClassDecl) {
-        self.add_decl(c.ident.to_id(), false);
+        self.add_decl(c.ident.to_id(), false, false);
 
         c.class.visit_with(self);
     }
 
     fn visit_class_expr(&mut self, c: &ClassExpr) {
         self.with_fn_scope(|v| {
             if let Some(id) = &c.ident {
-                v.add_decl(id.to_id(), false);
+                v.add_decl(id.to_id(), false, false);
             }
 
             c.class.visit_with(v);
@@ -223,7 +225,7 @@ impl Visit for Analyzer {
         match d {
             DefaultDecl::Class(c) => {
                 if let Some(id) = &c.ident {
-                    self.add_decl(id.to_id(), false);
+                    self.add_decl(id.to_id(), false, false);
                 }
 
                 self.with_fn_scope(|v| {
@@ -232,7 +234,7 @@ impl Visit for Analyzer {
             }
             DefaultDecl::Fn(f) => {
                 if let Some(id) = &f.ident {
-                    self.add_decl(id.to_id(), true);
+                    self.add_decl(id.to_id(), true, false);
                 }
 
                 f.function.visit_with(self)
@@ -264,7 +266,7 @@ impl Visit for Analyzer {
     }
 
     fn visit_fn_decl(&mut self, f: &FnDecl) {
-        self.add_decl(f.ident.to_id(), true);
+        self.add_decl(f.ident.to_id(), true, false);
 
         // https://github.com/swc-project/swc/issues/6819
         let has_rest = f.function.params.iter().any(|p| p.pat.is_rest());
@@ -288,7 +290,7 @@ impl Visit for Analyzer {
     fn visit_fn_expr(&mut self, f: &FnExpr) {
         if let Some(id) = &f.ident {
             self.with_fn_scope(|v| {
-                v.add_decl(id.to_id(), true);
+                v.add_decl(id.to_id(), true, false);
                 v.with_fn_scope(|v| {
                     // https://github.com/swc-project/swc/issues/6819
                     if f.function.params.iter().any(|p| p.pat.is_rest()) {
@@ -349,15 +351,15 @@ impl Visit for Analyzer {
     }
 
     fn visit_import_default_specifier(&mut self, n: &ImportDefaultSpecifier) {
-        self.add_decl(n.local.to_id(), true);
+        self.add_decl(n.local.to_id(), true, true);
     }
 
     fn visit_import_named_specifier(&mut self, n: &ImportNamedSpecifier) {
-        self.add_decl(n.local.to_id(), true);
+        self.add_decl(n.local.to_id(), true, true);
     }
 
     fn visit_import_star_as_specifier(&mut self, n: &ImportStarAsSpecifier) {
-        self.add_decl(n.local.to_id(), true);
+        self.add_decl(n.local.to_id(), true, true);
     }
 
     fn visit_member_expr(&mut self, e: &MemberExpr) {
@@ -404,7 +406,7 @@ impl Visit for Analyzer {
 
         if let Pat::Ident(i) = e {
             if self.is_pat_decl {
-                self.add_decl(i.to_id(), self.var_belong_to_fn_scope)
+                self.add_decl(i.to_id(), self.var_belong_to_fn_scope, false)
             } else {
                 self.add_usage(i.to_id())
             }

crates/swc_ecma_minifier/tests/fixture/issues/react-autowhatever/1/output.js

@@ -71,22 +71,44 @@ pub(crate) type RenameMap = AHashMap<FastId, JsWord>;
 
 #[derive(Debug, Default)]
 pub(super) struct ScopeData {
+    /// All identifiers used by this scope or children.
+    ///
     /// This is add-only.
     ///
     /// If the add-only contraint is violated, it is very likely to be a bug,
     /// because we merge every items in children to current scope.
     all: FxHashSet<FastId>,
 
+    /// Identifiers used for imports, for this scope or parents.
+    ///
+    /// This field exists because identifiers used for imports cannot be used
+    /// again.
+    ///
+    /// See https://github.com/swc-project/swc/issues/7634
+    imports: FxHashSet<FastId>,
+
     queue: Vec<Id>,
 }
 
 impl Scope {
-    pub(super) fn add_decl(&mut self, id: &Id, has_eval: bool, top_level_mark: Mark) {
+    pub(super) fn add_decl(
+        &mut self,
+        id: &Id,
+        has_eval: bool,
+        top_level_mark: Mark,
+        is_import: bool,
+    ) {
         if id.0 == js_word!("arguments") {
             return;
         }
 
-        self.data.all.insert(fast_id(id.clone()));
+        let fid = fast_id(id.clone());
+        if is_import {
+            self.data.imports.insert(fid.clone());
+        }
+
+        self.data.all.insert(fid);
+
         if !self.data.queue.contains(id) {
             if has_eval && id.1.outer().is_descendant_of(top_level_mark) {
                 return;
@@ -109,6 +131,7 @@ impl Scope {
         self.children.iter_mut().for_each(|child| {
             child.prepare_renaming();
 
+            child.data.imports.extend(self.data.imports.iter().cloned());
             self.data.all.extend(child.data.all.iter().cloned());
         });
     }
@@ -202,7 +225,7 @@ impl Scope {
                 continue;
             }
 
-            if self.data.all.contains(left) {
+            if self.data.all.contains(left) || self.data.imports.contains(left) {
                 return false;
             }
         }

crates/swc_ecma_minifier/tests/terser/compress/export/dynamic_import/output.js

@@ -1547,7 +1547,7 @@ fn test_es6_features() {
 
 #[test]
 fn test_export_default_paren_expr() {
-    fold_same("import fn from './b'; export default (class fn {});");
-    fold_same("import fn from './b'; export default (function fn () {});");
+    fold_same("import fn from './b'; export default (class fn1 {});");
+    fold_same("import fn from './b'; export default (function fn1 () {});");
     fold("export default ((foo));", "export default foo;");
 }