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This patch fixes a compile-time type mismatch. No upstream
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patch; this originated in Fedora and upstream has changed the
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underlying code in a different way.
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diff -rup a/malloc/hooks.c b/malloc/hooks.c
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--- a/malloc/hooks.c 2017-08-11 14:20:36.000000000 -0400
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+++ b/malloc/hooks.c 2017-08-11 15:43:15.939831964 -0400
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@@ -240,10 +240,10 @@ top_check(void)
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(char*)t + chunksize(t) == mp_.sbrk_base + main_arena.system_mem)))
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return 0;
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- mutex_unlock(&main_arena);
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+ mutex_unlock(&main_arena.mutex);
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malloc_printerr (check_action, "malloc: top chunk is corrupt", t,
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&main_arena);
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- mutex_lock(&main_arena);
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+ mutex_lock(&main_arena.mutex);
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/* Try to set up a new top chunk. */
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brk = MORECORE(0);
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