fix: missing compressor arg in optimize AST_VarDef (#1009)

terser · Jun 27, 2021 · 215db3c · 215db3c
1 parent 60a74bb
commit 215db3c
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Showing 2 changed files with 26 additions and 2 deletions.
diff --git a/lib/compress/index.js b/lib/compress/index.js
@@ -5102,11 +5102,11 @@ def_optimize(AST_Definitions, function(self) {
     return self;
 });
 
-def_optimize(AST_VarDef, function(self) {
+def_optimize(AST_VarDef, function(self, compressor) {
     if (
         self.name instanceof AST_SymbolLet
         && self.value != null
-        && is_undefined(self.value)
+        && is_undefined(self.value, compressor)
     ) {
         self.value = null;
     }

diff --git a/test/compress/issue-1006.js b/test/compress/issue-1006.js
@@ -0,0 +1,24 @@
+issue_1006: {
+    options = {
+        defaults: true,
+    }
+    input: {
+        function func(foo) {
+            function bar() {
+                return;
+            }
+            let baz = foo();
+            if (baz !== undefined) {
+                let qux = bar(baz.qux);
+            }
+        }
+    }
+    expect: {
+        function func(foo) {
+            let baz = foo();
+            if (void 0 !== baz) {
+                baz.qux;
+            }
+        }
+    }
+}