cmd/compile: compiler crash on valid code [1.18 backport]

[gopherbot]

@ianlancetaylor requested issue #52241 to be considered for backport to the next 1.18 minor release.

@gopherbot Please open backport to 1.18

This is a compiler crash on valid code.

[gopherbot]

Change https://go.dev/cl/404774 mentions this issue: [release-branch.go1.18] cmd/compile: allow exporting .rcvr ident

[toothrot]

Approved. Crash on valid code is a serious issue with no workaround.

[gopherbot]

Closed by merging e46ac38 to release-branch.go1.18.