In stretch, lightdm invokes the user's session with SIGPIPE ignored.
This can cause programs with careful error handling to fail.
See, for example, #841090.
I see that this bug is still outstanding in stretch.
To debian-release: The lightdm maintainers disagreed with me about
the bug severity.
Package: lightdm
Version: 1.18.1-1
Severity: serious
I have just discovered that my entire X session is running with
SIGPIPE ignored. I think this is the fault of lightdm - see below.
All Unix programs are entitled to assume that they start with
reasonable signal dispositions, which (with a
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