Destroying the temporary context used in evalcx and also doing a GC invalidates shape numbers, which kinda makes testing hard because it breaks shapeOf(evalcx("lazy")) === shapeOf(evalcx("lazy")); don't GC. rs=brendan

js/src/js.cpp

@@ -2678,7 +2678,7 @@ out:
 #ifdef JS_THREADSAFE
     JS_EndRequest(scx);
 #endif
-    JS_DestroyContext(scx);
+    JS_DestroyContextNoGC(scx);
     return ok;
 }