bin/55308: jemalloc throws asserts in long-running systat

[mac%s.culver.net@localhost]

>Number:         55308
>Category:       bin
>Synopsis:       After running a long time, jemalloc throws asserts
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    bin-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Thu May 28 02:50:00 +0000 2020
>Originator:     mac%culver.net@localhost
>Release:        NetBSD 9.99.60
>Organization:
	
>Environment:
System: NetBSD S.Culver.Net 9.99.60 NetBSD 9.99.60 (GENERIC) #0: Thu May 7 04:52:39 UTC 2020 mac%S.Culver.Net@localhost:/c/usr/src/sys/arch/evbarm/compile/obj/GENERIC evbarm
Architecture: earmv7hf
Machine: evbarm
>Description:
	zsh: suspended  systat -w1 vmstat
	# fg
	<jemalloc>: /usr/src/external/bsd/jemalloc/lib/../dist/src/arena.c:271: Failed assertion: "bitmap_get(slab_data->bitmap, &bin_info->bitmap_info, regind)"
	<jemalloc>: /usr/src/external/bsd/jemalloc/lib/../include/jemalloc/internal/extent_inlines.h:163: Failed assertion: "extent_slab_get(extent)"
	<jemalloc>: /usr/src/external/bsd/jemalloc/lib/../dist/src/arena.c:271: Failed assertion: "bitmap_get(slab_data->bitmap, &bin_info->bitmap_info, regind)"

>How-To-Repeat:
	Run "systat -w1 vmstat" for a week or so continuously
>Fix:

>Unformatted:
 		# ls -lF /usr/bin/systat
 		-r-xr-sr-x  2 root  kmem  176580 Jun 16  2019 /usr/bin/systat*