[Pkg-emacsen-addons] Bug#907715: lua-mode: FTBFS in buster/sid ("No buffer named *lua5.3*")

[Santiago Vila]

Package: src:lua-mode
Version: 20151025-3
Severity: serious
Tags: ftbfs

Dear maintainer:

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

--------------------------------------------------------------------------------
[...]
 debian/rules build-indep
dh build-indep --with elpa
   dh_update_autotools_config -i
   dh_autoreconf -i
   dh_auto_configure -i
   dh_auto_build -i
	make -j1
make[1]: Entering directory '/<<PKGBUILDDIR>>'
Loading 00debian-vars...
Loading /etc/emacs/site-start.d/50autoconf.el (source)...
Loading 00debian-vars...
Loading /etc/emacs/site-start.d/50autoconf.el (source)...
Loading 00debian-vars...
Loading /etc/emacs/site-start.d/50autoconf.el (source)...

[... snipped ...]

Indenting region...
Indenting region...done

  reindents according to luawiki examples

Hiding process buffer does not switch current window
  when process is active
  when process is active
  and does not signal when process is already killed
  and does not signal when process is already killed
  when process is not started
  when process is not started

Fontification in compilation buffer
  fontifies runtime error messages
  fontifies runtime error messages  
  fontifies syntax error messages
  fontifies syntax error messages  
  does not ask for file on "stdin:NN" errors
  does not ask for file on "stdin:NN" errors  FAILED

Test indent-new-comment-line
  works with -- ...
  works with -- ...
  works with ---- ....
  works with ---- ....
  doesn't recognize "--" inside strings and comments
  doesn't recognize "--" inside strings and comments
  works when the comment is empty
  works when the comment is empty

========================================
Fontification in compilation buffer does not ask for file on "stdin:NN" errors

Traceback (most recent call last):
  (unwind-protect (progn (save-current-buffer (setq buf (find-file fname)) (...
  (kill-buffer "*lua5.3*")
error: (error "No buffer named *lua5.3*")


Ran 59 out of 66 specs, 1 failed, in 0.2 seconds.

dh_elpa_test: buttercup -L . returned exit code 255
make: *** [debian/rules:4: build-indep] Error 255
dpkg-buildpackage: error: debian/rules build-indep subprocess returned exit status 2
--------------------------------------------------------------------------------

This is just how the build ends and not necessarily the relevant part.
For full build logs please see:

https://people.debian.org/~sanvila/build-logs/lua-mode/

To reproduce, please try building with sbuild on a single-CPU machine, where
this error seems to happen 95% of the time.

Thanks.