https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91440
--- Comment #1 from R Copley <rcopley at gmail dot com> --- The recipe isn't as stable as I thought. The same recipe on a different machine doesn't reproduce the issue. Apologies. On that machine with a real project (sorry, no minimal example) I'm now seeing this error: internal error in mingw32_gt_pch_use_address, at config/i386/host-mingw32.c:186: MapViewOfFileEx: Attempt to access invalid address. <command-line>: fatal error: had to relocate PCH As this is in mingw32-specific code it's probably for them to look at; also note that the MSYS2 package-build script also has a patch in this area <https://github.com/msys2/MINGW-packages/blob/master/mingw-w64-gcc/0010-Fix-using-large-PCH.patch> I tried the obvious experiment of editing the binaries to disable ASLR. Sure enough, this makes the problem go away. Note though that this didn't change between 9.1 and 9.2. The MSYS2 binaries for both versions have ASLR enabled.
