Bug#917592: libterm-termkey-perl: FTBFS (failing tests)

[gregor herrmann]

On Sat, 29 Dec 2018 00:25:25 +0000, Santiago Vila wrote:

> Package: src:libterm-termkey-perl
> Version: 0.16-3
> Severity: serious
> Tags: ftbfs

> I tried to build this package in buster but it failed:

> Test Summary Report
> -------------------
> t/05flags.t       (Wstat: 11 Tests: 2 Failed: 0)
>   Non-zero wait status: 11
>   Parse errors: Bad plan.  You planned 4 tests but ran 2.

Same in #917497.

Both tests fail during build and not during autopkgtests (locally and
on r-b/ci.debian.net).

After thinking a bit I tried:

#v+
--- a/debian/rules
+++ b/debian/rules
@@ -4,4 +4,4 @@
        dh $@

 override_dh_auto_test:
-       TERM=vt100 dh_auto_test
+       TERM=vt100 prove --blib --verbose t/*.t
#v-

(which happens during autopkgtest), and, tataa!, the tests also pass
during build.

So the question is why dh_auto_test fails.


For dh_auto_test we have:

   debian/rules override_dh_auto_test
make[1]: Entering directory '/build/libterm-termkey-perl-0.16'
TERM=vt100 dh_auto_test
	perl Build test --verbose 1


Sticking `TERM=vt100 perl Build test --verbose 1' into debian/rules
also makes the test pass. -- Ok …


So why does dh_auto_test fail? What has changed here? perl?
debhelper? Something else?


From the debhelper changelog:

debhelper (11.5.4) unstable; urgency=medium

  [ Niels Thykier ]
  * Dh_Lib.pm: Reopen stdin to read from /dev/null in doit (and its sibling
    functions) to prevent issues when stdin is open in write-only mode
    (which is what nohup(1) does).  Thanks to Julian Gilbey for reporting
    the issue and providing a sample patch for it as well.
    (Closes: #913663)


Can this be related? (The failing test operate on \*STDIN.)
Cc'ing the debhelper bug and debhelper maintainers …


Cheers,
gregor


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