Ubuntu
matplotlib package

  1. Bug #2020666
  2. Comment #2

Comment 2 for bug 2020666

Revision history for this message
Simon Chopin (schopin) wrote :

I tracked it down to us triggering a latent bug in matplotlib 3.6 introduced by https://github.com/matplotlib/matplotlib/commit/ff60b288cc83e68b0189b63e6c2c205972b1b6b9

The code assumes that the picture is RGBA-encoded, which the original file in the source package is. However, Ubuntu runs advancecomp as part of pkgbinarymangler, which changes the color encoding to reduce its size, thus triggering the latent bug in the code (which is otherwise fairly hard to trigger AFAICT)

I won't forward the changes to Debian since they're not hitting the bug.