Fails to parse build output and freezes indefinitely

[Rico Tzschichholz]

There are libreoffice snap builds for amd64 [1] and arm64 which are stuck the exact same way.

Afaict snapcraft crashed while parsing the build output.

[1] https://launchpad.net/~libreoffice/df-libreoffice/+snap/libreoffice-fresh/+build/2350372

:: [build HPX] el/helpcontent2/source/text/simpress/guide
:: Entity: line 1: parser error : Opening and ending tag mismatch: switchinline line 1 and root
Exception in thread Thread-45:
Traceback (most recent call last):
  File "/snap/snapcraft/10279/usr/lib/python3.10/threading.py", line 1016, in _bootstrap_inner
    self.run()
  File "/snap/snapcraft/10279/lib/python3.10/site-packages/craft_cli/messages.py", line 285, in run
    self._run_posix()
  File "/snap/snapcraft/10279/lib/python3.10/site-packages/craft_cli/messages.py", line 257, in _run_posix
    self._write(data)
  File "/snap/snapcraft/10279/lib/python3.10/site-packages/craft_cli/messages.py", line 242, in _write
    unicode_line = useful_line.decode("utf8")
UnicodeDecodeError: 'utf-8' codec can't decode byte 0xbc in position 0: invalid start byte

The deb build output looks like this which I would expect the snap build to behave as well:

[build HPX] el/helpcontent2/source/text/sbasic/python
HELPFILES=/tmp/gbuild.SMwYPO && S=/<<PKGBUILDDIR>> && I=$S/instdir && W=$S/workdir && POFILES=/tmp/gbuild.i4kgRa && LD_LIBRARY_PATH=${LD_LIBRARY_PATH:+$LD_LIBRARY_PATH:}"$I/program:$I/program" $W/LinkTarget/Executable/helpex -l el -mi ${HELPFILES} -m ${POFILES} -o $W/HelpTranslatePartTarget/el/helpcontent2/source/text/sbasic/python && rm -f ${POFILES} && touch /<<PKGBUILDDIR>>/workdir/HelpTranslatePartTarget/el/helpcontent2/source/text/sbasic/python/done && rm -f ${HELPFILES}
[build HPX] el/helpcontent2/source/text/sbasic/shared
Entity: line 1: parser error : Opening and ending tag mismatch: switchinline line 1 and root
�αζί και επιστρέφοντας το άθροισμά τους.</root>
                                                                               ^
Entity: line 1: parser error : Premature end of data in tag root line 1
�αζί και επιστρέφοντας το άθροισμά τους.</root>
                                                                               ^
HELPFILES=/tmp/gbuild.HZ8Z3B && S=/<<PKGBUILDDIR>> && I=$S/instdir && W=$S/workdir && POFILES=/tmp/gbuild.MFTIRb && LD_LIBRARY_PATH=${LD_LIBRARY_PATH:+$LD_LIBRARY_PATH:}"$I/program:$I/program" $W/LinkTarget/Executable/helpex -l el -mi ${HELPFILES} -m ${POFILES} -o $W/HelpTranslatePartTarget/el/helpcontent2/source/text/sbasic/shared && rm -f ${POFILES} && touch /<<PKGBUILDDIR>>/workdir/HelpTranslatePartTarget/el/helpcontent2/source/text/sbasic/shared/done && rm -f ${HELPFILES}
[build HPX] el/helpcontent2/source/text/sbasic/shared/01

[Rico Tzschichholz (ricotz)]

Additionally reported at https://github.com/snapcore/snapcraft/issues/4515