Reference to non-static member function must be called - Rebuild of the Debian archive with clang

"Reference to non-static member function must be called" build failure(s)
clang 6.0

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
bisonc++	6.01.03-1	./parserbase.h:318:24: error: reference to non-static member function must be called; did you mean to call it with no arguments?	Log
blitz++	1:0.10+ds-2	../../blitz/array/stencil-classes.cc:15126:20: error: reference to non-static member function must be called	Log
flexc++	2.06.04-1	./../parser/parserbase.h:324:24: error: reference to non-static member function must be called; did you mean to call it with no arguments?	Log

3 errors

Debian Package rebuild