fix corner case in collapse_vars (#5870)

fixes #5869
2024-06-28 21:19:58 +03:00
parent 8c5a899986
commit 6b23899ef3
2 changed files with 29 additions and 1 deletions
--- a/test/compress/collapse_vars.js
+++ b/test/compress/collapse_vars.js
@@ -10333,3 +10333,27 @@ issue_1666_undefined_strict: {
    }
    expect_stdout: true
 }
+
+issue_5869: {
+    options = {
+        collapse_vars: true,
+        evaluate: true,
+        pure_getters: "strict",
+        reduce_vars: true,
+        toplevel: true,
+        unused: true,
+    }
+    input: {
+        var a, b, log = console.log;
+        log();
+        a.p = 0;
+        b = a;
+        log(b);
+    }
+    expect: {
+        var a, log = console.log;
+        log();
+        log(void (a.p = 0));
+    }
+    expect_stdout: TypeError("Cannot set properties of undefined")
+}