internal compiler error: mismatched types

[zllangct]

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

$ go version
go version devel go1.18-9e6ad46bcc Sun Nov 7 04:57:22 2021 +0000 windows/amd64

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

go env Output

$ go env
set GOTOOLDIR=C:\xxxxxxxxx
set GOVCS=
set GOVERSION=devel go1.18-9e6ad46bcc Sun Nov 7 04:57:22 2021 +0000
set GCCGO=gccgo
set GOAMD64=v1
set AR=ar
set CC=gcc
set CXX=g++
set CGO_ENABLED=1
set GOMOD=xxxxxxxxxx
set GOWORK=
set CGO_CFLAGS=-g -O2
set CGO_CPPFLAGS=
set CGO_CXXFLAGS=-g -O2
set CGO_FFLAGS=-g -O2
set CGO_LDFLAGS=-g -O2
set PKG_CONFIG=pkg-config
set GOGCCFLAGS=-m64 -mthreads -fmessage-length=0 -fdebug-prefix-map=xxxxxxxxxxx

What did you do?

package main

type Handler func(in ...interface{})

type Foo[T any] struct{}

func (b *Foo[T]) Bar(in ...interface{}) {}

func (b *Foo[T]) Init() {
	_ = Handler(b.Bar)
}

func main() {
	c := &Foo[int]{}
	c.Init()
}

What did you see?

.\main.go:10:15: internal compiler error: mismatched types: (*Foo[go.shape.int_0]).Init.func1

goroutine 1 [running]:
runtime/debug.Stack()
	C:/sdk/gotip/src/runtime/debug/stack.go:24 +0x65
cmd/compile/internal/base.FatalfAt({0x4a3ce0?, 0xc0?}, {0x17c3b7f, 0x14}, {0xc00009d090, 0x1, 0x1})
	C:/sdk/gotip/src/cmd/compile/internal/base/print.go:227 +0x1ca
cmd/compile/internal/ir.UseClosure(0xc0004aaa50, 0xc0004140c0)
	C:/sdk/gotip/src/cmd/compile/internal/ir/func.go:413 +0x1e9
cmd/compile/internal/noder.(*genInst).buildClosure(0x1e37f20, 0xc000488840, {0x1933220, 0xc000035320?})
	C:/sdk/gotip/src/cmd/compile/internal/noder/stencil.go:532 +0x1735
cmd/compile/internal/noder.(*genInst).scanForGenCalls.func2({0x1933220, 0xc000035320})
	C:/sdk/gotip/src/cmd/compile/internal/noder/stencil.go:277 +0x1f4
cmd/compile/internal/ir.(*ConvExpr).editChildren(0xc0004aa820, 0xc0004a5110?)
	C:/sdk/gotip/src/cmd/compile/internal/ir/node_gen.go:445 +0x5d
cmd/compile/internal/ir.EditChildren(...)
	C:/sdk/gotip/src/cmd/compile/internal/ir/visit.go:185
cmd/compile/internal/noder.(*genInst).scanForGenCalls.func2({0x1931ab0, 0xc0004aa820})
	C:/sdk/gotip/src/cmd/compile/internal/noder/stencil.go:270 +0x113
cmd/compile/internal/ir.(*AssignStmt).editChildren(0xc0004aa7d0, 0xc00048f080)
	C:/sdk/gotip/src/cmd/compile/internal/ir/node_gen.go:163 +0xc8
cmd/compile/internal/ir.EditChildren(...)
	C:/sdk/gotip/src/cmd/compile/internal/ir/visit.go:185
cmd/compile/internal/noder.(*genInst).scanForGenCalls.func2({0x1931150, 0xc0004aa7d0})
	C:/sdk/gotip/src/cmd/compile/internal/noder/stencil.go:270 +0x113
cmd/compile/internal/ir.editNodes(...)
	C:/sdk/gotip/src/cmd/compile/internal/ir/node_gen.go:1521
cmd/compile/internal/ir.(*Func).editChildren(0xc000380000?, 0xc00048f080?)
	C:/sdk/gotip/src/cmd/compile/internal/ir/func.go:153 +0x74
cmd/compile/internal/ir.EditChildren(...)
	C:/sdk/gotip/src/cmd/compile/internal/ir/visit.go:185
cmd/compile/internal/noder.(*genInst).scanForGenCalls.func2({0x1931e98, 0xc000488840})
	C:/sdk/gotip/src/cmd/compile/internal/noder/stencil.go:270 +0x113
cmd/compile/internal/noder.(*genInst).scanForGenCalls(0x1e37f20, {0x1931e98, 0xc000488840})
	C:/sdk/gotip/src/cmd/compile/internal/noder/stencil.go:281 +0x2cb
cmd/compile/internal/noder.(*genInst).buildInstantiations(0x1e37f20, 0x1)
	C:/sdk/gotip/src/cmd/compile/internal/noder/stencil.go:65 +0x407
cmd/compile/internal/noder.BuildInstantiations(...)
	C:/sdk/gotip/src/cmd/compile/internal/noder/stencil.go:47
cmd/compile/internal/noder.(*irgen).generate(0xc00049e000, {0xc000088860, 0x2, 0xc000490000?})
	C:/sdk/gotip/src/cmd/compile/internal/noder/irgen.go:320 +0x3db
cmd/compile/internal/noder.check2({0xc000088860, 0x2, 0x2})
	C:/sdk/gotip/src/cmd/compile/internal/noder/irgen.go:92 +0x16d
cmd/compile/internal/noder.LoadPackage({0xc0000de120, 0x2, 0x0?})
	C:/sdk/gotip/src/cmd/compile/internal/noder/noder.go:90 +0x335
cmd/compile/internal/gc.Main(0x17e8f78)
	C:/sdk/gotip/src/cmd/compile/internal/gc/main.go:191 +0xb13
main.main()
	C:/sdk/gotip/src/cmd/compile/main.go:55 +0xdd

[gopherbot]

Change https://golang.org/cl/361961 mentions this issue: cmd/compile: fix irgen mis-handling of ... argument when creating closure