From 2bc631df8792d2f1356b5ef2dbf3ee0c46ecbd4f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Donny/=EA=B0=95=EB=8F=99=EC=9C=A4?= <kdy1997.dev@gmail.com>
Date: Tue, 21 Mar 2023 18:27:31 +0900
Subject: [PATCH] fix(es/compat): Don't modify private fields from
 `reserved_words` pass (#7113)

**Related issue:**

 - Closes https://github.com/swc-project/swc/issues/7106.
---
 .../fixture/issues-7xxx/7106/input/.swcrc     | 19 ++++++++++++++
 .../fixture/issues-7xxx/7106/input/input.js   |  8 ++++++
 .../fixture/issues-7xxx/7106/output/input.js  |  8 ++++++
 .../src/reserved_words.rs                     |  2 ++
 .../tests/static-blocks/issue-7106/input.js   |  8 ++++++
 .../tests/static-blocks/issue-7106/output.js  |  8 ++++++
 .../tests/strip.rs                            | 26 +++++++++++++++++++
 7 files changed, 79 insertions(+)
 create mode 100644 crates/swc/tests/fixture/issues-7xxx/7106/input/.swcrc
 create mode 100644 crates/swc/tests/fixture/issues-7xxx/7106/input/input.js
 create mode 100644 crates/swc/tests/fixture/issues-7xxx/7106/output/input.js
 create mode 100644 crates/swc_ecma_transforms_compat/tests/static-blocks/issue-7106/input.js
 create mode 100644 crates/swc_ecma_transforms_compat/tests/static-blocks/issue-7106/output.js

diff --git a/crates/swc/tests/fixture/issues-7xxx/7106/input/.swcrc b/crates/swc/tests/fixture/issues-7xxx/7106/input/.swcrc
new file mode 100644
index 000000000000..3dc717ffb5e7
--- /dev/null
+++ b/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
+}
\ No newline at end of file
diff --git a/crates/swc/tests/fixture/issues-7xxx/7106/input/input.js b/crates/swc/tests/fixture/issues-7xxx/7106/input/input.js
new file mode 100644
index 000000000000..56815c468648
--- /dev/null
+++ b/crates/swc/tests/fixture/issues-7xxx/7106/input/input.js
@@ -0,0 +1,8 @@
+export class test {
+    #throw() { };
+    #new() { };
+    test() {
+        this.#throw();
+        this.#new();
+    }
+}
\ No newline at end of file
diff --git a/crates/swc/tests/fixture/issues-7xxx/7106/output/input.js b/crates/swc/tests/fixture/issues-7xxx/7106/output/input.js
new file mode 100644
index 000000000000..99856e60fb22
--- /dev/null
+++ b/crates/swc/tests/fixture/issues-7xxx/7106/output/input.js
@@ -0,0 +1,8 @@
+export class test {
+    #throw() {}
+    #new() {}
+    test() {
+        this.#throw();
+        this.#new();
+    }
+}
diff --git a/crates/swc_ecma_transforms_compat/src/reserved_words.rs b/crates/swc_ecma_transforms_compat/src/reserved_words.rs
index 3b4e7717265f..49af049cee54 100644
--- a/crates/swc_ecma_transforms_compat/src/reserved_words.rs
+++ b/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) {}
 }
 
diff --git a/crates/swc_ecma_transforms_compat/tests/static-blocks/issue-7106/input.js b/crates/swc_ecma_transforms_compat/tests/static-blocks/issue-7106/input.js
new file mode 100644
index 000000000000..557577f5dd5e
--- /dev/null
+++ b/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();
+    }
+}
diff --git a/crates/swc_ecma_transforms_compat/tests/static-blocks/issue-7106/output.js b/crates/swc_ecma_transforms_compat/tests/static-blocks/issue-7106/output.js
new file mode 100644
index 000000000000..99856e60fb22
--- /dev/null
+++ b/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();
+    }
+}
diff --git a/crates/swc_ecma_transforms_typescript/tests/strip.rs b/crates/swc_ecma_transforms_typescript/tests/strip.rs
index 5d22a3ef7eed..9dcbc1facbe9 100644
--- a/crates/swc_ecma_transforms_typescript/tests/strip.rs
+++ b/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();
+        }
+    }
+      "
+);