[Syslog-ng-maintainers] Bug#960481: syslog-ng FTBFS with bison 3.6.1

[Adrian Bunk]

Source: syslog-ng
Version: 3.25.1-3
Severity: serious
Tags: ftbfs

https://tests.reproducible-builds.org/debian/rb-pkg/unstable/amd64/syslog-ng.html

...
lib/pragma-grammar.y: In function 'pragma_parse':
lib/pragma-grammar.y:402:73: error: 'YYEMPTY' undeclared (first use in this function)
  402 |           stmt_and_eol                                  { if (yychar != YYEMPTY) { cfg_lexer_unput_token(lexer, &yylval); } PRAGMA_END(); YYACCEPT; }
      |                                                                         ^~~~~~~
lib/pragma-grammar.y:402:73: note: each undeclared identifier is reported only once for each function it appears in
make[3]: *** [Makefile:15459: lib/libsyslog_ng_la-pragma-grammar.lo] Error 1