perl-smartmatch-engine-core-0.02-11.fc23 fails to build in F23 because a test fails:

t/00-compile.t ............ ok
Smartmatch is experimental at /usr/lib64/perl5/vendor_perl/smartmatch.pm line 71.
Smartmatch is experimental at (eval 8) line 1, <DATA> line 2.
[...]
Smartmatch is experimental at (eval 75) line 1, <DATA> line 76.
t/core.t .................. 
Failed 284/351 subtests 

Difference between working and failing build root is:

        perl 	4:5.22.0-346.fc23 	> 	4:5.22.0-347.fc23
	perl-libs 	4:5.22.0-346.fc23 	> 	4:5.22.0-347.fc23
	perl-macros 	4:5.22.0-346.fc23 	> 	4:5.22.0-347.fc23
	perl-Unicode-Normalize 		> 	1.19-1.fc23
	perl-Math-BigInt 		> 	1.9997-347.fc23
	perl-devel 	4:5.22.0-346.fc23 	> 	4:5.22.0-347.fc23
	perl-MIME-Base64 		> 	3.15-348.fc23
	perl-Term-Cap 		> 	1.16-1.fc23
	basesystem 	10.0-11.fc23 	> 	11-1.fc23
	perl-Pod-Escapes 	1:1.07-346.fc23 	> 	1:1.07-348.fc23
	systemtap-sdt-devel 	2.9-0.20150707git... 	> 	2.9-0.20150713git...
	python3-six 	1.9.0-2.fc23 	> 	1.9.0-3.fc23
	libseccomp 	2.2.1-1.fc23 	> 	2.2.3-0.fc23
	libidn 	1.30-4.fc23 	> 	1.31-1.fc23
	python 	2.7.10-4.fc23 	< 	
	python-setuptools 	18.0.1-2.fc23 	< 	
	gnutls 	3.4.2-3.fc23 	> 	3.4.3-1.fc23
	kernel-headers 	4.2.0-0.rc1.git1.1.... 	> 	4.2.0-0.rc2.git0.1....
	python3-pyparsing 		> 	2.0.3-2.fc23
	dwz 	0.11-6.fc23 	> 	0.12-1.fc23
	redhat-rpm-config 	33-2.fc23 	> 	34-1.fc23
	openssl-libs 	1:1.0.2c-3.fc23 	> 	1:1.0.2d-1.fc23
	xz-libs 	5.2.1-2.fc23 	> 	5.2.1-3.fc23
	pyparsing 	2.0.3-2.fc23 	< 	
	python-libs 	2.7.10-4.fc23 	< 	
	gdb 	7.9.50.20150531-5.fc23 	> 	7.9.90.20150709-6.fc23
	xz 	5.2.1-2.fc23 	> 	5.2.1-3.fc23
	python-pip 	7.1.0-1.fc23 	< 	
	gzip 	1.6-8.fc23 	> 	1.6-9.fc23

perl-4:5.22.0-347.fc23 started to propagate Fedora's compiler and linker flags properly, so this failure could be caused an incompatible flags applied by this package.