fix(es/compat): Don't modify private fields from reserved_words pass (

#7113)

**Related issue:**

 - Closes #7106.

crates/swc/tests/fixture/issues-7xxx/7106/input/.swcrc

@@ -0,0 +1,19 @@
+{
+    "jsc": {
+        "parser": {
+            "syntax": "typescript",
+            "tsx": false
+        },
+        "target": "es2022",
+        "loose": false,
+        "minify": {
+            "compress": false,
+            "mangle": false
+        }
+    },
+    "module": {
+        "type": "es6"
+    },
+    "minify": false,
+    "isModule": true
+}

crates/swc/tests/fixture/issues-7xxx/7106/input/input.js

@@ -0,0 +1,8 @@
+export class test {
+    #throw() { };
+    #new() { };
+    test() {
+        this.#throw();
+        this.#new();
+    }
+}

crates/swc/tests/fixture/issues-7xxx/7106/output/input.js

@@ -0,0 +1,8 @@
+export class test {
+    #throw() {}
+    #new() {}
+    test() {
+        this.#throw();
+        this.#new();
+    }
+}

crates/swc_ecma_transforms_compat/src/reserved_words.rs

@@ -35,6 +35,8 @@ impl VisitMut for EsReservedWord {
         s.local.visit_mut_with(self);
     }
 
+    fn visit_mut_private_name(&mut self, _: &mut PrivateName) {}
+
     fn visit_mut_prop_name(&mut self, _n: &mut PropName) {}
 }
 

crates/swc_ecma_transforms_compat/tests/static-blocks/issue-7106/input.js

@@ -0,0 +1,8 @@
+export class test {
+    #throw() { }
+    #new() { }
+    test() {
+        this.#throw();
+        this.#new();
+    }
+}

crates/swc_ecma_transforms_compat/tests/static-blocks/issue-7106/output.js

@@ -0,0 +1,8 @@
+export class test {
+    #throw() {}
+    #new() {}
+    test() {
+        this.#throw();
+        this.#new();
+    }
+}

crates/swc_ecma_transforms_typescript/tests/strip.rs

@@ -4532,3 +4532,29 @@ test!(
         A[A["a"] = a] = "a";
     })(A || (A = {}))"#
 );
+
+test!(
+    ::swc_ecma_parser::Syntax::Typescript(Default::default()),
+    |_| tr(),
+    issue_7106,
+    "
+    export class test {
+        #throw() {}
+        #new() {}
+        test() {
+          this.#throw();
+          this.#new();
+        }
+    }
+      ",
+    "
+    export class test {
+        #throw() {}
+        #new() {}
+        test() {
+          this.#throw();
+          this.#new();
+        }
+    }
+      "
+);