| 1 | diff --git a/src/system/libroot/posix/pthread/pthread.cpp b/src/system/libroot/posix/pthread/pthread.cpp
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| 2 | index 4c5104a..71e5eca 100644
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| 3 | --- a/src/system/libroot/posix/pthread/pthread.cpp
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| 4 | +++ b/src/system/libroot/posix/pthread/pthread.cpp
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| 5 | @@ -191,6 +191,9 @@ pthread_join(pthread_t thread, void** _value)
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| 6 |
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| 7 | if (_value != NULL)
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| 8 | *_value = thread->exit_value;
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| 9 | +
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| 10 | + if(thread->flags & THREAD_DETACHED)
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| 11 | + return EINVAL;;
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| 12 |
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| 13 | if ((atomic_or(&thread->flags, THREAD_DETACHED) & THREAD_DEAD) != 0)
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| 14 | free(thread);
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