Hi,

While investigating https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1028504 (or rather its Ubuntu equivalent),
I came upon this thread:

https://sourceforge.net/p/valgrind/mailman/valgrind-developers/thread/20190909131626.9633-1-mac%40mcrowe.com/#msg36759152

In their case, the error was suppressed by the default file, which
presumably was written for this kind of reason, however the file
patterns in glibc-2.x.supp.in don't match anything in Debian, rendering
the suppressions useless.

Cheers,
Simon