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bug#26709: Tests failing.

From: Pádraig Brady
Subject: bug#26709: Tests failing.
Date: Sat, 29 Apr 2017 20:59:24 -0700
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.8.0

On 29/04/17 01:37, Григорий Резников wrote:
> I've tried to improve tests coverage, so I've built and ran tests using 
> following commands:
> ./configure CFLAGS="-g -fprofile-arcs -ftest-coverage"
> make -j8
> sudo make check -j8
> After that I got FAIL on tests/mv/sticky-to-xpart and tests/rm/fail-2eperm.

Note there was a recently exposed race due to the extra steps to write the 
coverage files.
But your case is a permissions issue as the two root tests in question operate
as the "nobody" user by default, and thus can't rewrite the coverage files.

Note I can reproduce with `make coverage` (which uses these settings):

To avoid the issue you can use the NON_ROOT_USERNAME setting as described at:

So a recipe to generate coverage is:

  $ make -j8 coverage
    Overall coverage rate:
      lines......: 81.4% (43883 of 53881 lines)
      functions..: 89.5% (2335 of 2608 functions)
  $ sudo make -j8 build-coverage NON_ROOT_USERNAME=$USER SUBDIRS=.
  $ make gen-coverage
    Overall coverage rate:
      lines......: 82.5% (44476 of 53881 lines)
      functions..: 90.9% (2370 of 2608 functions)

You can view the html report with:
  xdg-open doc/coverage/index.html

I've updated the HACKING instructions as above and pushed.


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