fix corner case in collapse_vars (#5018)

fixes #5017
2021-06-21 04:12:45 +01:00
parent e368d39715
commit 111366fca0
4 changed files with 33 additions and 10 deletions
--- a/test/compress/destructured.js
+++ b/test/compress/destructured.js
@@ -2625,3 +2625,25 @@ issue_4994: {
    expect_stdout: "PASS"
    node_version: ">=6"
 }
+
+issue_5017: {
+    options = {
+        collapse_vars: true,
+        reduce_vars: true,
+        toplevel: true,
+    }
+    input: {
+        var a = function() {};
+        var b = c = a;
+        var c = [ c ] = [ c ];
+        console.log(c[0] === a ? "PASS" : "FAIL");
+    }
+    expect: {
+        var a = function() {};
+        var b = a;
+        var c = [ c ] = [ c = a ];
+        console.log(c[0] === a ? "PASS" : "FAIL");
+    }
+    expect_stdout: "PASS"
+    node_version: ">=6"
+}