runtime: "fatal error: unexpected signal" 0xC0000005 on Windows for a small program with a large allocation [1.13 backport]

[dmitshur]

@aclements requested issue #37470 to be considered for backport to the next 1.13 minor release.

@gopherbot, ple​ase open a backport to Go 1.14 and Go 1.15 1.13.

[dmitshur]

Approving because this is a serious problem (crash in rare but specific cases) with no workaround.

[gopherbot]

Change https://golang.org/cl/224418 mentions this issue: [release-branch.go1.13] runtime: fix rounding in materializeGCProg

[gopherbot]

Closed by merging 3a275aa to release-branch.go1.13.