From 8571a08a930474b68cb0e2daf3c7e666dcdcb15e Mon Sep 17 00:00:00 2001
From: Richard van Velzen <rvanvelzen@experty.com>
Date: Tue, 19 Apr 2016 20:01:26 +0200
Subject: [PATCH] Do not attempt evaluating class expressions

Broadly the same as function expressions - these actually are statements but
we're limited by the inheritance tree.

Fixes #1044
---
 lib/compress.js             | 3 +++
 test/compress/issue-1044.js | 9 +++++++++
 2 files changed, 12 insertions(+)
 create mode 100644 test/compress/issue-1044.js

diff --git a/lib/compress.js b/lib/compress.js
index fdb06839..32d38cef 100644
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -977,6 +977,9 @@ merge(Compressor.prototype, {
         def(AST_Arrow, function() {
             throw def;
         });
+        def(AST_Class, function() {
+            throw def;
+        });
         function ev(node, compressor) {
             if (!compressor) throw new Error("Compressor must be passed");
 
diff --git a/test/compress/issue-1044.js b/test/compress/issue-1044.js
new file mode 100644
index 00000000..360075a4
--- /dev/null
+++ b/test/compress/issue-1044.js
@@ -0,0 +1,9 @@
+issue_1044: {
+    options = { evaluate: true, conditionals: true };
+    input: {
+        const mixed = Base ? class extends Base {} : class {}
+    }
+    expect: {
+        const mixed = Base ? class extends Base {} : class {}
+    }
+}