Given following log snippets, their explanation, and nothing else, explain what failure, if any, occurred during build of this package.

  Snippets are in a format of [X] : [Y], where [X] is a log snippet, and [Y] is the explanation.

  Snippets are delimited with '================'.

  Drawing on information from all snippets, provide a concise explanation of the issue and recommend a solution.

  Explanation of the issue, and recommended solution, should take a handful of sentences.

  Snippets:

  [1 out of 1 hunk FAILED -- saving rejects to file test/unit/common.hpp.rej
The text leading up to this was:
--------------------------
|diff --git a/test/unit/test_event_queue.cpp b/test/unit/test_event_queue.cpp
|index daa0ccb9..17c10378 100644
|--- a/test/unit/test_event_queue.cpp
|+++ b/test/unit/test_event_queue.cpp
--------------------------
No file to patch.  Skipping patch.
1 out of 1 hunk ignored]: [Attached patch tries to modify a file test/unit/test_event_queue.cpp which does not exist in the source tree. ]

Issue: Build failed in prepare phase because one of attached patches does not match source code. The most probably that patch is for different version of the source code.
Resolution: Affected patch has to be inspected against the current source code and decide if it is still needed, updated for current version of the source code or removed if it is no more valid.