Upstream flex has added a yynoreturn macro, so this diff is no longer
needed. Partially reverts r181269.
Reviewed By: jkim
Differential Revision: https://reviews.freebsd.org/D29679
I missed the review comment to commit the changes separately, will
reland in multiple smaller commits.
Requested By: jkim
This reverts commit bbd421cdf6.
Upstream flex has added a yynoreturn, so this diff is no longer needed.
Partially reverts r181269. Also regenerate the pre-generated files that
are used for bootstrapping.
Reviewed By: jkim
Differential Revision: https://reviews.freebsd.org/D29679
Importing flex 2.6.4 has introduced a regression: input() now returns 0
instead of EOF to indicate that the end of input was reached, just like
traditional AT&T and POSIX lex. Note the behavior contradicts flex(1).
See "INCOMPATIBILITIES WITH LEX AND POSIX" section for information.
This incompatibility traces back to the original version and documented
in its manual page by the Vern Paxson.
Apparently, it has been reported in a few places, e.g.,
https://github.com/westes/flex/issues/448https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=911415
Unfortunately, this also breaks the scanner used by libdtrace and
dtrace is unable to resolve some probe argument types as a result. See
PR253440 for more information.
Note the regression was introduced by the following upstream commit
without any explanation or documentation change:
f863c9490e
Now we restore the traditional flex behavior unless lex-compatibility
mode is set with "-l" option because I believe the author originally
wanted to make it more lex and POSIX compatible.
PR: 253440
Reported by: markj
