Struggling to compile PyMuPDF. Segmentation fault about pymupdf

[julian-smith-artifex-com]

This looks like a failure to build MuPDF, caused by a failure to compile MuPDF's thirdparty/leptonica/src/numafunc1.c.

So it's not a PyMuPDF problem, and i can't reproduce it here.

Some things you could look at or try:

• What does cc --version show?
• Are you running with a small data limit - what does ulimit -a say?
• Follow the instructions in the error output to submit a compiler bug - run the original command along with an additional option -freport-bug.

[C-monC]

The build happens within a Jenkins container. The issue is intermittent so it's probably got to do with my build environment - I updated Pymupdf to latest yesterday and thought that caused the build failures.

Thanks for the quick assistance, I'll close this issue for now.

cc --version
cc (Ubuntu 11.4.0-1ubuntu1~22.04) 11.4.0

ulimit -a
real-time non-blocking time  (microseconds, -R) unlimited
core file size              (blocks, -c) 0
data seg size               (kbytes, -d) unlimited
scheduling priority                 (-e) 0
file size                   (blocks, -f) unlimited
pending signals                     (-i) 513967
max locked memory           (kbytes, -l) 16457064
max memory size             (kbytes, -m) unlimited
open files                          (-n) 1024
pipe size                (512 bytes, -p) 8
POSIX message queues         (bytes, -q) 819200
real-time priority                  (-r) 0
stack size                  (kbytes, -s) 8192
cpu time                   (seconds, -t) unlimited
max user processes                  (-u) 513967
virtual memory              (kbytes, -v) unlimited
file locks                          (-x) unlimited

[C-monC]

The issue arose from max locked memory being to low. The ulimits I sent above were from the host but the docker container running Jenkins capped memlock at +-3mb. This caused segmentation faults on random lines so searching for the issue gets no hits.

ulimit -l 4068916

[julian-smith-artifex-com]

Thanks for this extra information, it's good to know the problem is now understood.