Analyse following RPM build log snippet. Describe contents accurately, without speculation or suggestions for resolution.            
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Snippet: 
FAIL: test_iobuf
================

[==========] tests: Running 3 test(s).
[ RUN      ] test_sss_iobuf_read
[       OK ] test_sss_iobuf_read
[ RUN      ] test_sss_iobuf_write
[       OK ] test_sss_iobuf_write
[ RUN      ] test_sss_iobuf_secure
[  ERROR   ] --- 0xffffffffffffffff == 0xffffffffffffffff
[   LINE   ] --- src/tests/cmocka/test_iobuf.c:134: error: Failure!
[  FAILED  ] test_sss_iobuf_secure
[==========] tests: 3 test(s) run.
[  PASSED  ] 2 test(s).
[  FAILED  ] tests: 1 test(s), listed below:
[  FAILED  ] test_sss_iobuf_secure

 1 FAILED TEST(S)
FAIL test_iobuf (exit status: 1)

The log of the failed test.