The way rock constructs class information can lead to data races in seemingly unrelated code #1003

Foo: class {
 init: func
 bar: func
}

test__FooClass *test__Foo_class(){
 static _Bool __done__ = false;
 static test__FooClass class = 
 {
 {
 {
 {
 .instanceSize = sizeof(test__Foo),
 .size = sizeof(void*)
 },
 .__defaults__ = (void*) test__Foo___defaults___impl,
 .__destroy__ = (void*) lang_types__Object___destroy___impl,
 },
 },
 .bar = (void*) test__Foo_bar_impl,
 };
 lang_types__Class *classPtr = (lang_types__Class *) &class;
 if(!__done__){
 classPtr->super = (lang_types__Class*) lang_types__Object_class();
 __done__ = true;
 classPtr->name = (void*) lang_String__makeStringLiteral("Foo", 3);
 }
 return &class;
}

const test__FooClass test__Foo_class = {
 {
 {
 {
 .instanceSize = sizeof(test__Foo),
 .size = sizeof(void*),
 .name = lang_String__makeStringLiteral("Foo", 3)
 },
 .__defaults__ = (void*) test__Foo___defaults___impl,
 .__destroy__ = (void*) lang_types__Object___destroy___impl,
 },
 },
 .bar = (void*) test__Foo_bar_impl,
 };