Bug 1370541 - Always assert that the atom is marked when setting a function's name r=sfink

js/src/jsfun.h

@@ -341,6 +341,7 @@ class JSFunction : public js::NativeObject
         MOZ_ASSERT(atom);
         MOZ_ASSERT(!hasGuessedAtom());
         MOZ_ASSERT(!isClassConstructor());
+        MOZ_ASSERT(js::AtomIsMarked(zone(), atom));
         atom_ = atom;
         flags_ |= HAS_COMPILE_TIME_NAME;
     }
@@ -355,6 +356,7 @@ class JSFunction : public js::NativeObject
         MOZ_ASSERT(atom);
         MOZ_ASSERT(!hasCompileTimeName());
         MOZ_ASSERT(!hasGuessedAtom());
+        MOZ_ASSERT(js::AtomIsMarked(zone(), atom));
         atom_ = atom;
         flags_ |= HAS_GUESSED_ATOM;
     }