Cannot find member in the struct - Rebuild of the Debian archive with clang

"Cannot find member in the struct" build failure(s)
clang 11.0.0

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
aegisub	3.2.2+dfsg-6	util.cpp:30:2: error: no member named 'this_thread' in namespace 'std'; did you mean 'boost::this_thread'?	Log
cgit	1.2.3+git2.25.1-1	../filter.c:388:10: error: no member named '__fprintf_chk' in 'struct cgit_filter'	Log
mercator	0.3.3-6	polygon_intersect.h:667:37: error: no member named 'm_orient' in 'WFMath::Polygon<2>'	Log
openvswitch	2.13.0+dfsg1-12	../lib/vlog.c:1127:35: error: no member named '__syslog_chk' in 'struct syslog_class'	Log
stimfit	0.16.0-1	./funclib.cpp:165:20: error: no member named 'logl' in namespace 'std'; did you mean simply 'logl'?	Log

5 errors

Debian Package rebuild