fix corner case in unused (#4835)

fixes #4834
2021-04-01 20:55:53 +01:00
parent 4084948d3b
commit e755d01a0b
2 changed files with 47 additions and 11 deletions
--- a/test/compress/drop-unused.js
+++ b/test/compress/drop-unused.js
@@ -3357,3 +3357,34 @@ issue_4806_3: {
    }
    expect_stdout: "PASS"
 }
+
+issue_4834: {
+    options = {
+        inline: true,
+        keep_fargs: false,
+        pure_getters: "strict",
+        reduce_vars: true,
+        side_effects: true,
+        toplevel: true,
+        unused: true,
+    }
+    input: {
+        try {
+            new function(a, b) {
+                b;
+                b.p;
+            }(42);
+        } catch (e) {
+            console.log("PASS");
+        }
+    }
+    expect: {
+        try {
+            void b.p;
+        } catch (e) {
+            console.log("PASS");
+        }
+        var b;
+    }
+    expect_stdout: "PASS"
+}