runtime: "fatal error: unexpected signal" 0xC0000005 on Windows for a small program with a large allocation [1.15 backport]

[gopherbot]

@aclements requested issue #37470 to be considered for backport to the next 1.15 minor release.

@gopherbot, please open a backport to Go 1.14 and Go 1.15.

[aclements]

I typoed a version.