xpdf distiller seems broken

[anntzer]

Bug report

Bug summary

What the title says

Code for reproduction

rcParams["ps.usedistiller"] = "xpdf"; plot(); savefig("/tmp/test.ps")

Actual outcome

<elided>
  File ".../matplotlib/backends/backend_ps.py", line 1247, in xpdf_distill
    cbook._check_and_log_subprocess(
  File ".../matplotlib/cbook/__init__.py", line 2129, in _check_and_log_subprocess
    raise RuntimeError(
RuntimeError: The command
    ps2pdf '-dAutoFilterColorImages#false' '-dAutoFilterGrayImages#false' '-dAutoRotatePages#false' '-sGrayImageFilter#FlateEncode' '-sColorImageFilter#FlateEncode' '-sPAPERSIZE#letter' /tmp/tmpddvwd66_/tmp.ps /tmp/tmpddvwd66_/tmp.ps.pdf
failed and generated the following output:

and the following error:
Unrecoverable error: typecheck in .putdeviceprops

Expected outcome

Success.

Matplotlib version

• Operating system: arch linux / fedora
• Matplotlib version: master, but present as far back as mpl3.0 at least.
• Matplotlib backend (print(matplotlib.get_backend())): ps
• Python version: 38
• Jupyter version (if applicable): no
• Other libraries: ghostscript 9.50 on arch; 9.27 on fedora

[QuLogic]

Bisect points to 4ba9be1, i.e., #10295, but the problem is not changing = to #, but rather that that PR incorporates #10294 which adds -dAutoRotatePages#false (on a side note, this is why you shouldn't mix different behavioural changes in a single commit.)

But maybe since it doesn't fail on CI, but does locally, it's a regression in Ghostscript too.