https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114617
--- Comment #3 from Gaius Mulley <gaius at gcc dot gnu.org> --- With the patch the reported failure examples above pass: $ gm2 -g -c BasicFileSys.mod -I../../../../Sandpit/gm2-outside-tree-tests/build/source/m2pp/src/ -fsources Compiling: BasicFileSys.mod Pass 0: lexical analysis, parsing, modules and associated filenames Module SYSTEM : /home/gaius/opt/lib/gcc/x86_64-pc-linux-gnu/14.0.1/m2/m2cor/SYSTEM.def [m2cor] Module M2RTS : /home/gaius/opt/lib/gcc/x86_64-pc-linux-gnu/14.0.1/m2/m2pim/M2RTS.def [m2pim] Module RTExceptions : /home/gaius/opt/lib/gcc/x86_64-pc-linux-gnu/14.0.1/m2/m2pim/RTExceptions.def [m2pim] Module BasicFileSys : ../../../../Sandpit/gm2-outside-tree-tests/build/source/m2pp/src/BasicFileSys.def Module BasicFileSys : BasicFileSys.mod Module COROUTINES : /home/gaius/opt/lib/gcc/x86_64-pc-linux-gnu/14.0.1/m2/m2pim/COROUTINES.def [m2pim] (for C) Module Size : ./Size.def Module stat : ./stat.def Module stdio : ./stdio.def (for C) Module unistd : ./unistd.def (for C) Module fcntl : ./fcntl.def (for C) Module stat0 : ./stat0.def (for C) Module SysTypes : ./SysTypes.def Pass 1: scopes, enumerated types, imports and exports Pass 2: constants and types Pass C: aggregate constants Pass 3: quadruple generation Pass 4: gcc tree generation symbols to gcc trees statements to gcc trees gcc trees given to the gcc backend and $ gm2 -c -fiso constbool3.mod