fix corner case in dead_code (#3969)

fixes #3967
2020-06-08 06:42:09 +01:00
parent 3230952d57
commit cd55eeb77c
2 changed files with 23 additions and 1 deletions
--- a/test/compress/dead-code.js
+++ b/test/compress/dead-code.js
@@ -1193,3 +1193,24 @@ self_assignments: {
    }
    expect_stdout: "PASS 2 PASS PASS"
 }
+
+issue_3967: {
+    options = {
+        dead_code: true,
+    }
+    input: {
+        var a = "FAIL";
+        try {
+            a = 0 in (a = "PASS");
+        } catch (e) {}
+        console.log(a);
+    }
+    expect: {
+        var a = "FAIL";
+        try {
+            a = 0 in (a = "PASS");
+        } catch (e) {}
+        console.log(a);
+    }
+    expect_stdout: "PASS"
+}