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:

  [++ cat cvs.log
Possible precedence problem between ! and pattern match (m//) at /builddir/build/BUILD/git-2.49.0-build/git-2.49.0/git-cvsserver line 5015.
++ return 1
error: last command exited with $?=1
not ok 30 - cvs diff -r v1 -u

#	
#		( cd cvswork && cvs -f diff -r v1 -u >../cvsDiff.out 2>../cvs.log ) &&
#		test_must_be_empty cvsDiff.out &&
#		test_must_be_empty cvs.log
#	
expecting success of 9402.31 'cvs diff -N -r v2 -u': 
	( cd cvswork && ! cvs -f diff -N -r v2 -u >../cvsDiff.out 2>../cvs.log ) &&
	test_must_be_empty cvs.log &&
	test -s cvsDiff.out &&
	check_diff cvsDiff.out v2 v1 >check_diff.out 2>&1
]: [Here build fails, because there is warning "Possible precedence problem between ! and pattern match (m//) ".]

Issue: It failed because of changes in new Perl 5.42.0. 
In script git-csvserver.perl, it is code on line 5015

"if(! $refName=~/^[1-9][0-9]*(\.[1-9][0-9]*)*$/)"
which now raised the warning
Resolution: There is more way how to fixed it, describe on page 
https://metacpan.org/release/ETHER/perl-5.41.12/view/pod/perl5414delta.pod#New-Warnings

I used this replacement 

-    if(! $refName=~/^[1-9][0-9]*(\.[1-9][0-9]*)*$/)
+    if(! ($refName=~/^[1-9][0-9]*(\.[1-9][0-9]*)*$/))

and it fixed the failure.