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
--- a/src/test/common/CMakeLists.txt
+++ b/src/test/common/CMakeLists.txt
@@ -12,15 +12,6 @@
   ${CMAKE_DL_LIBS}
   )
 
-if(HAVE_BLKID)
-  # unittest_blkdev
-  add_executable(unittest_blkdev
-    test_blkdev.cc
-    )
-  add_ceph_unittest(unittest_blkdev)
-  target_link_libraries(unittest_blkdev ceph-common ${BLKID_LIBRARIES})
-endif()
-
 # unittest_bloom_filter
 add_executable(unittest_bloom_filter
   test_bloom_filter.cc
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<tr><td><span title='2019-02-14 03:50:18 +0100'>2019-02-14</span></td><td><a href='/guix/commit/gnu/packages/sync.scm?id=811b907da7bad99b7d7493623a0d7d61c388451b'>gnu: rclone: Update to 1.46.</a><span class='msg-avail'>...</span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2019-01-16 16:08:22 +0100'>2019-01-16</span></td><td><a href='/guix/commit/gnu/packages/sync.scm?id=cd0322a3efd96577de9ab35e4432d1ae399257c8'>gnu: Move sqlite to separate module.</a><span class='msg-avail'>...</span></td><td>Ricardo Wurmus</td></tr>
<tr><td><span title='2019-01-15 14:46:44 +0100'>2019-01-15</span></td><td><a href='/guix/commit/gnu/packages/sync.scm?id=44d10b1f722856ab8e9b942804aa7ef33e2ef739'>gnu: Separate Python core packages from the rest.</a><span class='msg-avail'>...</span></td><td>Ricardo Wurmus</td></tr>
<tr><td><span title='2019-01-02 19:53:06 +0200'>2019-01-02</span></td><td><a href='/guix/commit/gnu/packages/sync.scm?id=afbf9763faf231c27ef25315d4d24379e1762568'>gnu: qtsyncthingtray: Use 'git-fetch'.</a><span class='msg-avail'>...</span></td><td>Efraim Flashner</td></tr>
<tr><td><span title='2019-01-02 19:53:06 +0200'>2019-01-02</span></td><td><a href='/guix/commit/gnu/packages/sync.scm?id=a69f071537ce5dfd3419054dc85a598d0b702864'>gnu: owncloud-client: Update to 2.5.1.10973.</a><span class='msg-avail'>...</span></td><td>Efraim Flashner</td></tr>