https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102831
--- Comment #3 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec dot Uni-Bielefeld.DE> --- > --- Comment #2 from Thomas Schwinge <tschwinge at gcc dot gnu.org> --- > Are you guys able to reliably reproduce the problem? Asking because for me, > it > was very flaky: some (seemingly random) change elsewhere in the compiler, and > PR101574 often didn't reproduce anymore (but came back later). (But really > have not anymore seen it since the aforementioned commit.) In my case the errors were anything but reliable: they started to show on Solaris 11.3 builds only, sometimes sparc, sometimes x86, at others (from the identical source tree) Solaris 11.4/SPARC only. In the end (not having made progress to figure out what's wrong), I ended up with a local patch to disable -Wparentheses for lra-constraints.c and sparseset.c as those failures didn't have any other effect on the build or testsuite results, but just had become a nuisance.