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:

  [lisp/progmodes/elisp-mode-tests.log:
   FAILED  xref-elisp-test-find-defs-defgeneric-co-located-default
   FAILED  xref-elisp-test-find-defs-defgeneric-el
   FAILED  xref-elisp-test-find-defs-defgeneric-implicit-generic
   FAILED  xref-elisp-test-find-defs-defgeneric-no-default
   FAILED  xref-elisp-test-find-defs-defgeneric-separate-default
make[2]: *** [Makefile:348: check-doit] Error 2]: [This snippet displays why the build failed - since the building process incorporates some tests, when those tests fail, the build fails as well. ]

Issue: This package follows commits on Emacs master repository. This means that breakages to some functionality is expected. Build failed because some tests failed.
Resolution: In this case, either update failing tests in upstream, fix the cause of those text failing, wait for someone to fix those tests and build package with newer commit or just disable those tests via package if core functionality stays intact.  