[Bug malloc/19243] reused_arena can pick an arena on the free list, leading to an assertion failure and reference count corruption

[fweimer at redhat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=19243

Florian Weimer <fweimer at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|reused_arena can pick an    |reused_arena can pick an
                   |arena on the free list,     |arena on the free list,
                   |leading to an assertion     |leading to an assertion
                   |failure                     |failure and reference count
                   |                            |corruption

--- Comment #3 from Florian Weimer <fweimer at redhat dot com> ---
It's not just an incorrect assert.  If the bug triggers, the attached threads
counter will be incorrect.

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