Arch Linux

Description:
qemu-system-x86_64 started segfaulting since jemalloc got upgraded from 4.5.0-1 to 5.0.0-2
There have been other upgrades since last run (e.g. glibc from 2.25-2 to 2.25-3) but jemalloc sounds like the most likely culprit

Additional info:
* package version(s): qemu 2.9.0-1, jemalloc 5.0.0-2
* segfault does not occur right away, but after ~30-40 minutes of running. I only took time to reproduce twice, partial backtraces below, but both are related to jemalloc and thread local storage.
* probably a duplicate of https://bugs.archlinux.org/index.php?do=details&action=details.addvote&task_id=54483 but its summary is really bad and I cannot edit it ; I also think jemalloc "just" broke its ABI from 4.5 to 5.0 so qemu needs a recompile (a local build fixes things for me) ; unclear which package is wrong there. Sorry if duplicating brings more work, I'd just rather not stay with a badly named jemalloc report :)

backtraces:
first - (gdb) bt
#0 0x00007f869c80a1d1 in () at /usr/lib/libjemalloc.so.2
#1 0x00007f869c80b860 in () at /usr/lib/libjemalloc.so.2
#2 0x00007f869c80b9d4 in () at /usr/lib/libjemalloc.so.2
#3 0x00007f869c80c9a1 in () at /usr/lib/libjemalloc.so.2
#4 0x00007f869c7be29a in calloc () at /usr/lib/libjemalloc.so.2
#5 0x00007f86a2a16852 in allocate_dtv () at /lib64/ld-linux-x86-64.so.2
#6 0x00007f86a2a171ce in _dl_allocate_tls () at /lib64/ld-linux-x86-64.so.2
#7 0x00007f869bc66dca in pthread_create@@GLIBC_2.2.5 () at /usr/lib/libpthread.so.0
#8 0x0000559e3e77e475 in qemu_thread_create ()
#9 0x0000559e3e7792a7 in ()
#10 0x0000559e3e779308 in ()
#11 0x00007f869bc66297 in start_thread () at /usr/lib/libpthread.so.0
#12 0x00007f869b9a725f in clone () at /usr/lib/libc.so.6
second - (gdb) bt
#0 0x00007f7dfd2954d3 in () at /usr/lib/libjemalloc.so.2
#1 0x00007f7dfd2955cd in () at /usr/lib/libjemalloc.so.2
#2 0x00007f7dfd2977d8 in () at /usr/lib/libjemalloc.so.2
#3 0x00007f7dfc6f03c8 in __nptl_deallocate_tsd.part.4 () at /usr/lib/libpthread.so.0
#4 0x00007f7dfc6f135d in start_thread () at /usr/lib/libpthread.so.0
#5 0x00007f7dfc43225f in clone () at /usr/lib/libc.so.6


Steps to reproduce:
run a VM with /usr/bin/qemu-system-x86_64 and wait for a while.