Bug 1219954 - Check for OOM in js::AsmJSFunctionToString() r=bbouvier

js/src/asmjs/AsmJSLink.cpp

@@ -1297,7 +1297,7 @@ js::AsmJSFunctionToString(JSContext* cx, HandleFunction fun)
 
             size_t nameEnd = begin + fun->atom()->length();
             Rooted<JSFlatString*> src(cx, source->substring(cx, nameEnd, end));
-            if (!AppendUseStrictSource(cx, fun, src, out))
+            if (!src || !AppendUseStrictSource(cx, fun, src, out))
                 return nullptr;
         } else {
             Rooted<JSFlatString*> src(cx, source->substring(cx, begin, end));

js/src/jit-test/tests/asm.js/bug1219954.js

@@ -0,0 +1,12 @@
+"use strict";
+
+if (!('oomTest' in this))
+    quit();
+
+let g = (function() {
+    "use asm";
+    function f() {}
+    return f;
+})();
+
+oomTest(() => "" + g);