(gdb) bt
#0  0x000055966f8bdc9b in tcmalloc::ThreadCache::ReleaseToCentralCache(tcmalloc::ThreadCache::FreeList*, unsigned long, int) ()
#1  0x000055966f8bdd8c in tcmalloc::ThreadCache::ListTooLong(tcmalloc::ThreadCache::FreeList*, unsigned long) ()
#2  0x000055966f8c6a0a in tc_free ()
#3  0x000055966e0449c8 in __wt_free_ref ()
#4  0x000055966e043b4d in __wt_free_ref_index ()
#5  0x000055966e043ef6 in __wt_page_out ()
#6  0x000055966dfd87df in __wt_evict ()
#7  0x000055966dfd05eb in __evict_page ()
#8  0x000055966dfd0b43 in __evict_lru_pages ()
#9  0x000055966dfd3957 in __wt_evict_thread_run ()
#10 0x000055966e02a9b9 in __thread_run ()
#11 0x00007f694f18a6ba in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#12 0x00007f694eec04dd in clone () from /lib/x86_64-linux-gnu/libc.so.6