cmd/compile: internal error on complex comparison

[gazerro]

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

$ go version
go version devel +44c9354c5a Fri Jun 21 05:21:30 2019 +0000 darwin/amd64

Does this issue reproduce with the latest release?

Yes.

What did you do?

_ = 1i < 2i

https://play.golang.org/p/syOtlxxmrya

What did you expect to see?

invalid operation: 1i < 2i (operator < not defined on complex128)

What did you see instead?

internal compiler error: compareOp: bad comparison: 1i < 2i

[agnivade]

Not a regression from 1.12. So adding to 1.14.

And seems to happen only while directly comparing literals. If I compare complex variables, I get the correct error.

[gopherbot]

Change https://golang.org/cl/183459 mentions this issue: cmd/compile: fix internal error on complex comparison

[fgm]

A very similar error happens on bit operations, as shown on https://play.golang.org/p/hYUAK-ex6tQ (#33458 closed as dup), except it is not an internal error on comparison but on operation. .