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cmd/compile: internal compiler error: method receiver, when missing function type on anonymous function #22389

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anisus opened this issue Oct 23, 2017 · 4 comments
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cmd/compile: internal compiler error: method receiver, when missing function type on anonymous function #22389

anisus opened this issue Oct 23, 2017 · 4 comments
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Go1.10

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@anisus
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anisus commented Oct 23, 2017

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

go1.9.1 windows/amd64

Does this issue reproduce with the latest release?

Yes

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

windows/amd64

What did you do?

Missed typing the parameter type for an anonymous function which is using the same parameter name as a variable defined in surrounding function.

It is reproducible in play.golang.org

https://play.golang.org/p/AP3xRF11H4

What did you expect to see?

No internal compiler error

What did you see instead?

internal compiler error: method receiver
@ALTree
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ALTree commented Oct 23, 2017

Appears to be already fixed on tip

$ go version
go version go1.9 linux/amd64

$ go build test.go
# command-line-arguments
./test.go:16:14: f is not a type
./test.go:16:8: internal compiler error: method receiver

goroutine 1 [running]:
runtime/debug.Stack(0x0, 0x0, 0x0)
	/usr/local/go/src/runtime/debug/stack.go:24 +0xa7
cmd/compile/internal/gc.Fatalf(0xb5dd44, 0xf, 0x0, 0x0, 0x0)
	/usr/local/go/src/cmd/compile/internal/gc/subr.go:181 +0x230
cmd/compile/internal/gc.typecheck1(0xc4202f3800, 0x1, 0xc4202f3680)
	/usr/local/go/src/cmd/compile/internal/gc/typecheck.go:1285 +0x4a5d
cmd/compile/internal/gc.typecheck(0xc4202f3800, 0x1, 0xc4202f3680)
	/usr/local/go/src/cmd/compile/internal/gc/typecheck.go:201 +0x782
cmd/compile/internal/gc.typecheckslice(0xc420046d30, 0x2, 0x2, 0x1)
	/usr/local/go/src/cmd/compile/internal/gc/typecheck.go:55 +0x54
cmd/compile/internal/gc.Main(0xb73f90)
	/usr/local/go/src/cmd/compile/internal/gc/main.go:480 +0x1fd0
main.main()
	/usr/local/go/src/cmd/compile/main.go:49 +0x95

$ gotip version
go version devel +378de1ae43 Tue Oct 17 04:03:16 2017 +0000 linux/amd64

$ gotip build test.go
# command-line-arguments
./test.go:16:14: f is not a type

@griesemer griesemer added this to the Go1.10 milestone Oct 23, 2017
@odeke-em
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odeke-em commented Oct 31, 2017 •
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@mdempsky your CL https://go-review.googlesource.com/c/go/+/70850 and commit f3d4ff7#diff-4e8331dc0915d867dc05240b929434de fixed this issue. I'll mail a CL locking in a test for this issue and then we can close this issue.

@gopherbot
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Change https://golang.org/cl/74630 mentions this issue: cmd/compile: test for omitted ICE diagnostics after normal messages

@odeke-em odeke-em self-assigned this Oct 31, 2017
gopherbot pushed a commit that referenced this issue Nov 6, 2017
@odeke-em
cmd/compile: test for omitted ICE diagnostics after normal messages

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Learn about vigilant mode
0ba4eba 
Updates #22389

@mdempsky's CL 70850 fixed the unnecessary
compile stack trace printing during ICE diagnostics.

This CL adds a test to lock in this behavior.

Change-Id: I9ce49923c80b78cb8c0bb5dc4af3c860a43d63ba
Reviewed-on: https://go-review.googlesource.com/74630
Run-TryBot: Emmanuel Odeke <emm.odeke@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
@odeke-em
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odeke-em commented Nov 6, 2017 •
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Alright, closed with CL https://go-review.googlesource.com/c/go/+/74630 and commit 0ba4eba. Thanks for the report @anisus and for tracking it @ALTree and @mdempsky for the actual fix!

@odeke-em odeke-em closed this as completed Nov 6, 2017
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@mdempsky @anisus @ALTree @odeke-em @griesemer @gopherbot