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[PATCH] fix libstdc++/52604 : __freelist::~__freelist re-initializes _M_thread_freelist

All,

The attached patch re-initializes _M_thread_freelist in __freelist::~__freelist just after calling
::operator delete(static_cast<void*>(_M_thread_freelist_array));

It avoids valgrind errors in __pool<true>::_M_get_thread_id() later invoked.

Testcases :
  ext/mt_allocator/deallocate_global_thread-1.cc
  ext/mt_allocator/deallocate_global_thread-3.cc

Tested on x86_64-linux (make check, make check-performance).

Laurent

PS : Already approved by Paolo Carlini under the 52604 discussions.

Attachment: PR-52604.patch
Description: Text document

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