Dear Maintainer,

We recently saw a crash in the affecting the pcp package in the CI
system of the Cockpit project https://cockpit-project.org/

Process 9141 (pmproxy) of user 995 terminated abnormally with signal
11/SEGV, processing...
Process 9141 (pmproxy) of user 995 dumped core.
Module libnss_systemd.so.2 from deb systemd-257.13-1~deb13u1.amd64
Module libzstd.so.1 from deb libzstd-1.5.7+dfsg-1.amd64
Stack trace of thread 9141:
#0  0x00007fbcf0253053 n/a (libpcp_web.so.1 + 0x39053)
#1  0x00007fbcf02726a5 n/a (libpcp_web.so.1 + 0x586a5)
#2  0x00007fbcf02713da n/a (libpcp_web.so.1 + 0x573da)
#3  0x00007fbcf00f75a2 n/a (libuv.so.1 + 0x235a2)
#4  0x00007fbcf00f8c57 n/a (libuv.so.1 + 0x24c57)
#5  0x00007fbcf00e4e56 uv_run (libuv.so.1 + 0x10e56)
#6  0x0000564b56acb9de n/a (/usr/lib/pcp/bin/pmproxy + 0x99de)
#7  0x0000564b56acab5b n/a (/usr/lib/pcp/bin/pmproxy + 0x8b5b)
#8  0x00007fbcef769ca8 n/a (libc.so.6 + 0x29ca8)
#9  0x00007fbcef769d65 __libc_start_main (libc.so.6 + 0x29d65)
#10 0x0000564b56acb0f1 n/a (/usr/lib/pcp/bin/pmproxy + 0x90f1)
ELF object binary architecture: AMD x86-64

The crash occured during gating tests when updating to the latest
version of Debian trixie in one of our testing images:
  - https://github.com/cockpit-project/bots/pull/9216

We've seen similiar crashes on Ubuntu as well and are tracking this
issue here:
  - upstream: https://github.com/cockpit-project/bots/issues/6178
  - downstream: https://bugs.launchpad.net/ubuntu/+source/pcp/+bug/2060275

The issue seems somewhat uncommon and it doesn't reproduce on retry.

The downstream Ubuntu report, in particular, contains a lot of useful
context.  It seems fairly certain that this is the same bug.