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Kris Austin
7e545651bb
VS 2026's ARM64 code generator needs about 27 GB for _PyUnicode_ToNumeric, a switch with 1951 cases in Objects/unicodetype_db.h; the same file takes under 1 GB on x64. The 16 GB CI runner has an 18.9 GB commit limit and only gets through when Windows grows the pagefile on the temp disk in time, so cold arm64 dependency builds fail at random with C1002 "compiler is out of heap space". build_release_vs.bat returns 0 on failure, so the job still reports success and the incomplete dependencies are cached. A property sheet compiles that one file with optimisation off on arm64; the rest stays whole-program optimised and x64 is unchanged. MSBuild reads it from PCbuild/msbuild.rsp, which is now written at configure time and copied in, so a checkout path with spaces works too.