This test tries to walk a sysfs path and hits a null pointer exception.

/tmp/guix-build-ceph-12.0.0.drv-0/ceph-12.0.0/src/test/common/test_blkdev.cc:32: Failure
Expected: (dir) != (nullptr), actual: NULL vs 8-byte object <00-00 00-00 00-00 00-00>

diff --git a/src/test/common/CMakeLists.txt b/src/test/common/CMakeLists.txt
index 5172663898..ac84085eaa 100644
--- a/src/test/common/CMakeLists.txt
+++ b/src/test/common/CMakeLists.txt
@@ -12,15 +12,6 @@ target_link_libraries(get_command_descriptions
   ${CMAKE_DL_LIBS}
   )
 
-if(HAVE_BLKID)
-# unittest_blkdev
-add_executable(unittest_blkdev
-  test_blkdev.cc
-  )
-add_ceph_unittest(unittest_blkdev ${CMAKE_RUNTIME_OUTPUT_DIRECTORY}/unittest_blkdev)
-target_link_libraries(unittest_blkdev global ${BLKID_LIBRARIES})
-endif(HAVE_BLKID)
-
 # unittest_bloom_filter
 add_executable(unittest_bloom_filter
   test_bloom_filter.cc
-- 
2.11.1

 type='submit' value='switch'/></form></td></tr>
<tr><td class='sub'>Wojtek's customized Guix</td><td class='sub right'></td></tr></table>
<table class='tabs'><tr><td>
<a href='/guix/about/'>about</a><a href='/guix/'>summary</a><a href='/guix/refs/?id=3fb3291e25a7827f1466fba4943c5098a0a0a524'>refs</a><a class='active' href='/guix/log/etc/substitutes?showmsg=1'>log</a><a href='/guix/tree/etc/substitutes?id=3fb3291e25a7827f1466fba4943c5098a0a0a524'>tree</a><a href='/guix/commit/etc/substitutes?id=3fb3291e25a7827f1466fba4943c5098a0a0a524'>commit</a><a href='/guix/diff/etc/substitutes?id=3fb3291e25a7827f1466fba4943c5098a0a0a524'>diff</a></td><td class='form'><form class='right' method='get' action='/guix/log/etc/substitutes'>
<input type='hidden' name='id' value='3fb3291e25a7827f1466fba4943c5098a0a0a524'/><input type='hidden' name='showmsg' value='1'/><select name='qt'>
<option value='grep'>log msg</option>
<option value='author'>author</option>
<option value='committer'>committer</option>
<option value='range'>range</option>
</select>
<input class='txt' type='search' size='10' name='q' value=''/>
<input type='submit' value='search'/>
</form>
</td></tr></table>
<div class='path'>path: <a href='/guix/log/?id=3fb3291e25a7827f1466fba4943c5098a0a0a524&amp;showmsg=1'>root</a>/<a href='/guix/log/etc?id=3fb3291e25a7827f1466fba4943c5098a0a0a524&amp;showmsg=1'>etc</a>/<a href='/guix/log/etc/substitutes?id=3fb3291e25a7827f1466fba4943c5098a0a0a524&amp;showmsg=1'>substitutes</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/etc/substitutes?id=3fb3291e25a7827f1466fba4943c5098a0a0a524'>Collapse</a>)</th><th class='left'>Author</th></tr>
<tr class='logheader'><td><span title='2019-06-29 14:27:22 +0200'>2019-06-29</span></td><td class='logsubject'><a href='/guix/commit/etc/substitutes?id=3a8bfebed94ba295432da8304b7ffb4a611ef761'>etc: Remove hydra.gnu.org.pub key.</a></td><td>Tobias Geerinckx-Rice</td></tr>
<tr class='nohover-highlight'><td/><td colspan='3' class='logmsg'>
* etc/substitutes/hydra.gnu.org.pub: Delete file.
* guix/self.scm (miscellaneous-files): Don't install it.
* Makefile.am (dist_pkgdata_DATA): Remove it.
* gnu/services/base.scm (%default-authorized-guix-keys): Likewise.
(hydra-key-authorization): Rename to…
(substitute-key-authorization): …this.  Adjust only call site.


</td></tr>
<tr class='logheader'><td><span title='2019-05-01 11:05:47 +0200'>2019-05-01</span></td><td class='logsubject'><a href='/guix/commit/etc/substitutes?id=757e633d57a7b994759d69e41dd759a39f1a34ae'>build: Change default substitute server to "ci.guix.gnu.org".</a></td><td>Ludovic Courtès</td></tr>
<tr class='nohover-highlight'><td/><td colspan='3' class='logmsg'>
* config-daemon.ac: Replace "ci.guix.info" with "ci.guix.gnu.org".
* doc/guix.texi (SUBSTITUTE-SERVER): Likewise.
* etc/substitutes/ci.guix.gnu.org.pub: New file.
* Makefile.am (dist_pkgdata_DATA): Add it.
* guix/scripts/build.scm (%default-log-urls): Update.
* guix/scripts/substitute.scm (%default-substitute-urls): Likewise.
* guix/store.scm (%default-substitute-urls): Likewise.
* guix/self.scm (miscellaneous-files): Add "ci.guix.gnu.org".


</td></tr>
<tr class='logheader'><td><span title='2018-12-04 10:57:56 +0100'>2018-12-04</span></td><td class='logsubject'><a href='/guix/commit/etc/substitutes?id=6a837b6062ab405f6ca6d9c0163836769098d89b'>etc: Add "ci.guix.info.pub" public key file.</a></td><td>Ludovic Courtès</td></tr>
<tr class='nohover-highlight'><td/><td colspan='3' class='logmsg'>
* etc/substitutes/ci.guix.info.pub: New file.
* Makefile.am (dist_pkgdata_DATA): Add it.
* guix/self.scm (miscellaneous-files): Add
"share/guix/ci.guix.info.pub".


</td></tr>
<tr class='logheader'><td><span title='2018-11-06 00:04:11 +0100'>2018-11-06</span></td><td class='logsubject'><a href='/guix/commit/etc/substitutes?id=aa919fbc890c5438166083f9ff02e4b1968a182b'>maint: Move substitute public keys to etc/substitutes.</a></td><td>Ludovic Courtès</td></tr>
<tr class='nohover-highlight'><td/><td colspan='3' class='logmsg'>
* berlin.guixsd.org.pub, hydra.gnu.org.pub: Move to...
* etc/substitutes: ... here.  New directory.
* Makefile.am (dist_pkgdata_DATA): Adjust accordingly.


</td></tr>