[Bug 2143749] Re: extract crashed with CurtinInstallError

[Olivier Gayot]

Interesting, Subiquity reports an error in the extraction step, but we
see that the `curtin extract` process is actually running and eventually
finishes correctly.

2026-03-09 16:38:47,168 DEBUG root:38 start: subiquity/Install/install/curtin_install/run_curtin_step: executing curtin install extract step
2026-03-09 16:39:12,221 ERROR root:38 finish: subiquity/Install/install/curtin_install/run_curtin_step: FAIL: 
2026-03-09 16:39:12,222 ERROR root:38 finish: subiquity/Install/install/curtin_install: FAIL: 
2026-03-09 16:39:12,222 DEBUG subiquity.common.errorreport:386 generating crash report
2026-03-09 16:39:12,235 ERROR root:38 finish: subiquity/Install/install: FAIL: 
[...]
2026-03-09 16:39:37,578 DEBUG root:38 start: subiquity/Install/install/curtin_install/run_curtin_step/cmd-install: curtin command install
2026-03-09 16:39:37,579 DEBUG root:38 start: subiquity/Install/install/curtin_install/run_curtin_step/cmd-install/stage-extract: writing install sources to disk
2026-03-09 16:39:37,579 DEBUG root:38 start: subiquity/Install/install/curtin_install/run_curtin_step/cmd-install/stage-extract/builtin: running 'curtin extract'
2026-03-09 16:39:40,079 DEBUG root:38 start: subiquity/Install/install/curtin_install/run_curtin_step/cmd-install/stage-extract/builtin/cmd-extract/: acquiring and extracting image from cp:///tmp/tmp1xlwcmju/mount
2026-03-09 16:42:21,828 DEBUG root:38 finish: subiquity/Install/install/curtin_install/run_curtin_step/cmd-install/stage-extract/builtin/cmd-extract/: SUCCESS: acquiring and extracting image from cp:///tmp/tmp1xlwcmju/mount
2026-03-09 16:42:21,829 DEBUG root:38 finish: subiquity/Install/install/curtin_install/run_curtin_step/cmd-install/stage-extract/builtin: SUCCESS: running 'curtin extract'
2026-03-09 16:42:21,830 DEBUG root:38 finish: subiquity/Install/install/curtin_install/run_curtin_step/cmd-install/stage-extract: SUCCESS: writing install sources to disk
2026-03-09 16:42:21,831 DEBUG root:38 finish: subiquity/Install/install/curtin_install/run_curtin_step/cmd-install: SUCCESS: curtin command install

So I think something happened to the subiquity process, that made it
think curtin failed - but it didn't.

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https://bugs.launchpad.net/bugs/2143749

Title:
  extract crashed with CurtinInstallError

Status in subiquity package in Ubuntu:
  New

Bug description:
  Installing today's resolute-live-server-riscv64.iso using subiquity
  25.10+git162.b7197f30  failed. A prior installation from the same ISO
  succeeded.

  Title: extract crashed with CurtinInstallError
  Traceback:
   Traceback (most recent call last):
     File "/snap/subiquity/7099/lib/python3.12/site-packages/subiquity/server/controllers/install.py", line 249, in run_curtin_step
       await run_curtin_command(
     File "/snap/subiquity/7099/lib/python3.12/site-packages/subiquity/server/curtin.py", line 244, in run_curtin_command
       return await cmd.wait(input=input)
              ^^^^^^^^^^^^^^^^^^^^^^^^^^^
     File "/snap/subiquity/7099/lib/python3.12/site-packages/subiquity/server/curtin.py", line 125, in wait
       result = await self.runner.wait(self.proc, input=input)
                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
     File "/snap/subiquity/7099/lib/python3.12/site-packages/subiquity/server/runner.py", line 112, in wait
       raise subprocess.CalledProcessError(
   subprocess.CalledProcessError: Command '['systemd-run', '--wait', '--same-dir', '--property', 'SyslogIdentifier=subiquity_log.1802', '--setenv', 'PATH=/snap/subiquity/7099/bin:/snap/subiquity/7099/usr/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin:/snap/subiquity/7099/bin:/snap/subiquity/7099/sbin', '--setenv', 'PYTHONPATH=:/snap/subiquity/7099/lib/python3.12/site-packages', '--setenv', 'PYTHON=/snap/subiquity/7099/usr/bin/python3.12', '--setenv', 'SNAP=/snap/subiquity/7099', '--', '/snap/subiquity/7099/usr/bin/python3.12', '-m', 'curtin', '--showtrace', '-vvv', '--set', 'json:reporting={"subiquity": {"type": "journald", "identifier": "curtin_event.1802.7"}}', '-c', '/var/log/installer/curtin-install/subiquity-extract.conf', 'install', '--set', 'json:stages=["extract"]', 'cp:///tmp/tmp1xlwcmju/mount']' returned non-zero exit status 1.

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