Hello, I have found a bug in the gcc preprocessor which causes gcc to hang. The smallest input to gcc which causes this hang is,
#line 1 "/dev/stdout" #def xy The bug report to gcc is here, https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90034 bison will produce such an output when invoked like, bison -o /dev/stdout parser.y I hesitate to even file a bug report with bison, except that it seems to be a regression. That is, recent version(s) of bison produce such an output, but I have used bison in this fashion for years without a problem. I believe this is a recent behavior change in bison. I tried to build bison from historical tags (v3.0 and v3.2) to check the previous behavior, but was not able to produce a binary that worked on my system. Thanks -Todd
