Panic when checking if receiver is nil for nested pointer

[noamlerner]

What version of Go are you using (go version)?

$ go 1.20

Does this issue reproduce with the latest release?

Yes

What operating system and processor architecture are you using (go env)?

go env Output

$ go env
GO111MODULE="on"
GOARCH="arm64"
GOOS="darwin"

What did you do?

https://go.dev/play/p/5Gf2pDNgCgS

What did you expect to see?

I expect to be able to check if a recieving pointer is nil.

What did you see instead?

panic: runtime error: invalid memory address or nil pointer dereference

[seankhliao]

working as intended.
b.IsNil() is equivalent to Foo.IsNil(b.Foo), which is a nil pointer dereference

see also #18617