https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98912
--- Comment #3 from David Binderman <dcb314 at hotmail dot com> ---
For varasm.c line 8285 is
for (p = s; p < limit && *p != '\0'; p++)
So either the limit is wrong or there are some un-init bytes in
the string. My money is on option 2 ;->
Maybe a suitable first step would be to produce some debug output,
(maybe fprintf on stderr ?) of the parameters to default_elf_asm_output_ascii,
i.e s and len.
Whichever of s or len that valgrind detects would be the culprit.
