Bug#904452: pango1.0: flaky autopkgtest: pango_layout_set_markup_with_accel: Error on line 2 char 28

[Paul Gevers]

Source: pango1.0
Version: 1.42.1-1
Severity: important
X-Debbugs-CC: debian-ci at lists.debian.org
User: debian-ci at lists.debian.org
Usertags: flaky

While inspecting regressions in autopkgtest results¹, I noticed that
your package failed multiple times² without apparent changes and passed
later again. Recent cases had the error that I copied below, I haven't
checked older history. The last regression was involved in delaying
the migration of fribidi.

Could you please investigate and make your autopkgtest more robust?
Please contact me if you need help and you think I can provide that (I
am not subscribed to this bug). Note that we recently added the "flaky"
restriction to autopkgtest. If you can't really fix the test, but still
want it run, you can mark it as not suitable for gating.

Recent discussion of gating migration by autopkgtests on debian-devel³
noted that if this is going to work, and in particular if we are going
to *block* migration when it causes autopkgtest regressions rather than
merely delaying it, intermittent autopkgtest failures are likely to have
to be considered RC due to their impact on the tested package's
dependencies and time unaware people are going to waist on looking into
the issue; for now I've filed it as important.

Paul

¹ https://ci.debian.net/packages/p/pango1.0
²
https://ci.debian.net/data/autopkgtest/testing/amd64/p/pango1.0/610952/log.gz
https://ci.debian.net/data/autopkgtest/testing/amd64/p/pango1.0/662717/log.gz
https://ci.debian.net/data/autopkgtest/unstable/amd64/p/pango1.0/331745/log.gz
³ https://lists.debian.org/debian-devel/2018/05/msg00061.html

https://ci.debian.net/data/autopkgtest/testing/amd64/p/pango1.0/610952/log.gz

/layout/valid-1.markup:
(/usr/lib/pango1.0/installed-tests/pango/test-layout:1983):
Pango-WARNING **: 09:16:42.416: pango_layout_set_markup_with_accel:
Error on line 2 char 28: Invalid UTF-8 encoded text in name - not valid
'\xf0U<'
FAIL: pango/test-layout.test (Child process killed by signal 5)

https://ci.debian.net/data/autopkgtest/testing/amd64/p/pango1.0/662717/log.gz

/layout/valid-1.markup:
(/usr/lib/pango1.0/installed-tests/pango/test-layout:1987):
Pango-WARNING **: 09:15:23.974: pango_layout_set_markup_with_accel:
Error on line 2 char 28: 'VU<' is not a valid name: '<'
FAIL: pango/test-layout.test (Child process killed by signal 5)

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