compress undefined property names (#2811)

- enforce property names as string - handle `void 0` as `undefined` in `hoist_props` & `reduce_vars`
2018-01-19 00:36:30 +08:00
parent 983e69128b
commit 082e004b87
6 changed files with 46 additions and 16 deletions
--- a/test/compress/hoist_props.js
+++ b/test/compress/hoist_props.js
@@ -664,3 +664,25 @@ issue_2519: {
    }
    expect_stdout: "5.5"
 }
+
+undefined_key: {
+    options = {
+        evaluate: true,
+        hoist_props: true,
+        join_vars: true,
+        passes: 4,
+        reduce_vars: true,
+        toplevel: true,
+        unused: true,
+    }
+    input: {
+        var a, o = {};
+        o[a] = 1;
+        o.b = 2;
+        console.log(o[a] + o.b);
+    }
+    expect: {
+        console.log(3);
+    }
+    expect_stdout: "3"
+}