Bug#911944: neovim FTBFS: tests fail

[Helmut Grohne]

Source: neovim
Version: 0.3.1-1
Severity: serious
Tags: ftbfs

neovim fails to build from source in unstable.

| [  ERROR   ] 6 errors, listed below:
| [  ERROR   ] test/functional/helpers.lua @ 743: after_each
| test/helpers.lua:289: crash detected (see above)
| 
| stack traceback:
|         test/helpers.lua:289: in function 'check_cores'
|         test/functional/helpers.lua:748: in function <test/functional/helpers.lua:743>
| 
| [  ERROR   ] test/functional/helpers.lua @ 743: after_each
| test/helpers.lua:289: crash detected (see above)
| 
| stack traceback:
|         test/helpers.lua:289: in function 'check_cores'
|         test/functional/helpers.lua:748: in function <test/functional/helpers.lua:743>
| 
| [  ERROR   ] test/functional/helpers.lua @ 743: after_each
| test/helpers.lua:289: crash detected (see above)
| 
| stack traceback:
|         test/helpers.lua:289: in function 'check_cores'
|         test/functional/helpers.lua:748: in function <test/functional/helpers.lua:743>
| 
| [  ERROR   ] test/functional/helpers.lua @ 743: after_each
| test/helpers.lua:289: crash detected (see above)
| 
| stack traceback:
|         test/helpers.lua:289: in function 'check_cores'
|         test/functional/helpers.lua:748: in function <test/functional/helpers.lua:743>
| 
| [  ERROR   ] test/functional/helpers.lua @ 743: after_each
| test/helpers.lua:289: crash detected (see above)
| 
| stack traceback:
|         test/helpers.lua:289: in function 'check_cores'
|         test/functional/helpers.lua:748: in function <test/functional/helpers.lua:743>
| 
| [  ERROR   ] test/functional/helpers.lua @ 743: after_each
| test/helpers.lua:289: crash detected (see above)
| 
| stack traceback:
|         test/helpers.lua:289: in function 'check_cores'
|         test/functional/helpers.lua:748: in function <test/functional/helpers.lua:743>
| 
| 
|  18 SKIPPED TESTS
|  6 ERRORS
| -- Output to stderr:
...
| ninja: build stopped: subcommand failed.
| make[1]: *** [debian/rules:77: override_dh_auto_test-arch] Error 1
| make[1]: Leaving directory '/<<PKGBUILDDIR>>'
| make: *** [debian/rules:39: binary] Error 2
| dpkg-buildpackage: error: debian/rules binary subprocess returned exit status 2

Looking to reproducible builds, the failure pattern looks quite random:

https://tests.reproducible-builds.org/debian/rb-pkg/unstable/amd64/neovim.html

However, in local builds for unstable/amd64 in sbuild, I didn't get a
single successful build.

Helmut