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:

  ["/usr/bin/perl" "/usr/share/perl5/vendor_perl/ExtUtils/xsubpp"  -typemap '/usr/share/perl5/ExtUtils/typemap' -typemap '/home/test/fedora/perl-EV/perl-EV-4.34-build/EV-4.34/typemap'  EV.xs > EV.xsc
Unrecognized escape \S passed through at (eval 77) line 2, <__ANONIO__> line 868.
EV.c: In function ‘XS_EV__Watcher_is_active’:
EV.c:1472:45: error: ‘stash_’ undeclared (first use in this function); did you mean ‘stash_io’?
 1472 |               && (SvSTASH (SvRV (ST(0))) == stash_" . (ev_watcher * =~ /ev_(S+)/, "int") . "
      |                                             ^~~~~~
      |                                             stash_io]: [xsubpp tool warns and a compiler exits with an error.]

Issue: ExtUtils::ParseXS 3.57 removed refactored typemap parser and stopped recognizing never formally supported quoting with double quotes character.
Resolution: EV's typemap file needs to be updated use ${} substitution instead of quoting with `"' in T_WATCHER mapping.