Default arguments cannot be added to a function template (already declared)

"Default arguments cannot be added to a function template (already declared)" build failure(s)
clang 2.9

Versions: 2.9 - 3.0 - 3.1 - 3.2 - 3.3 - 3.4 - 3.4.2 - 3.5.0 - 3.6.0 - 3.8.1 - 3.9.1 - 4.0.1 - 5.0 - 6.0 - 8.0.1 - 9.0.1 - 10.0.0 - 11.0.0 - 12.0.1 - 13.0.0

Package	Version	Supposed error message	Full log
iulib	0.3-2	./imglib/imgops.cc:136:15: error: default arguments cannot be added to a function template that has already been declared	Log
seqan	1.2-1	../seqan/file/file_format_embl.h:46:6: error: default arguments cannot be added to a function template that has already been declared	Log
vxl	1.14.0-8	bvxm_util.h:929:77: error: default arguments cannot be added to a function template that has already been declared	Log

3 errors

Debian Package rebuild