>>254
ひ、日本語でおk、、、

>If control enters the declaration concurrently while the variable is being initialized, the concurrent execution shall wait for completion of the initialization.85
>If control re-enters the declaration recursively while the variable is being initialized, the behavior is undefined.
はどう読めばいいの？
結局concurrentlyにre-enterされるときはbehavior is undefinedとしか読めなさげ

>>254
以上の状況なので>>244の糞コードは直しても仕方が無い