cmd/compile: internal compiler error: panic with range over integer value [1.22 backport]

[gopherbot]

@griesemer requested issue #67141 to be considered for backport to the next 1.22 minor release.

@gopherbot please consider this for backport to 1.22 and 1.21.

[gopherbot]

Change https://go.dev/cl/586161 mentions this issue: [release-branch.go1.22] cmd/compile: initialize posBaseMap correctly

[cagedmantis]

Approved as this is a bug with no workaround.

[gopherbot]

Closed by merging 6b89e7d to release-branch.go1.22.