cmd/compile: failed to build modernc.org/libc with internal compiler error: walkExpr: switch 1 unknown op RECOVER

[johejo]

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

$ go version
go version devel go1.18-48dfddbab3 Sun Aug 15 02:18:46 2021 +0000 linux/amd64

Does this issue reproduce with the latest release?

No, tip only

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

go env Output

$ go env
GO111MODULE=""
GOARCH="amd64"
GOBIN=""
GOCACHE="/home/johejo/.cache/go-build"
GOENV="/home/johejo/.config/go/env"
GOEXE=""
GOEXPERIMENT=""
GOFLAGS=""
GOHOSTARCH="amd64"
GOHOSTOS="linux"
GOINSECURE=""
GOMODCACHE="/home/johejo/go/pkg/mod"
GONOPROXY=""
GONOSUMDB=""
GOOS="linux"
GOPATH="/home/johejo/go"
GOPRIVATE=""
GOPROXY="https://proxy.golang.org,direct"
GOROOT="/home/johejo/ghq/github.com/golang/go"
GOSUMDB="sum.golang.org"
GOTMPDIR=""
GOTOOLDIR="/home/johejo/ghq/github.com/golang/go/pkg/tool/linux_amd64"
GOVCS=""
GOVERSION="devel go1.18-48dfddbab3 Sun Aug 15 02:18:46 2021 +0000"
GCCGO="gccgo"
AR="ar"
CC="gcc"
CXX="g++"
CGO_ENABLED="1"
GOMOD="/home/johejo/ghq/gitlab.com/cznic/libc/go.mod"
CGO_CFLAGS="-g -O2"
CGO_CPPFLAGS=""
CGO_CXXFLAGS="-g -O2"
CGO_FFLAGS="-g -O2"
CGO_LDFLAGS="-g -O2"
PKG_CONFIG="pkg-config"
GOGCCFLAGS="-fPIC -m64 -pthread -fmessage-length=0 -fdebug-prefix-map=/tmp/go-build680021489=/tmp/go-build -gno-record-gcc-switches"

What did you do?

git clone https://gitlab.com/cznic/libc.git
cd libc/
go build ./...

What did you expect to see?

Build succeds

What did you see instead?

# modernc.org/libc
walk
.   RECOVER tc(1) INTER-interface {} # libc.go:90:21 INTER-interface {}
./libc.go:90:21: internal compiler error: walkExpr: switch 1 unknown op RECOVER

goroutine 1 [running]:
runtime/debug.Stack()
        /home/johejo/ghq/github.com/golang/go/src/runtime/debug/stack.go:24 +0x65
cmd/compile/internal/base.FatalfAt({0xecefc0, 0xc0}, {0xd0277c, 0x21}, {0xc0006555f8, 0x1, 0x1})
        /home/johejo/ghq/github.com/golang/go/src/cmd/compile/internal/base/print.go:227 +0x154
cmd/compile/internal/base.Fatalf(...)
        /home/johejo/ghq/github.com/golang/go/src/cmd/compile/internal/base/print.go:196
cmd/compile/internal/walk.walkExpr1({0xe5e878, 0xc000ecefc0}, 0xc000ecefc0)
        /home/johejo/ghq/github.com/golang/go/src/cmd/compile/internal/walk/expr.go:82 +0x1136
cmd/compile/internal/walk.walkExpr({0xe5e878, 0xc000ecefc0}, 0xc000655a80)
        /home/johejo/ghq/github.com/golang/go/src/cmd/compile/internal/walk/expr.go:55 +0x428
cmd/compile/internal/walk.walkAssign(0xc000655a80, {0xe5e490, 0xc000eeac30})
        /home/johejo/ghq/github.com/golang/go/src/cmd/compile/internal/walk/assign.go:72 +0x9dc
cmd/compile/internal/walk.walkExpr1({0xe5e490, 0xc000eeac30}, 0xc000eeac30)
        /home/johejo/ghq/github.com/golang/go/src/cmd/compile/internal/walk/expr.go:179 +0x43f
cmd/compile/internal/walk.walkExpr({0xe5e490, 0xc000eeac30}, 0xc000655a80)
        /home/johejo/ghq/github.com/golang/go/src/cmd/compile/internal/walk/expr.go:55 +0x428
cmd/compile/internal/walk.walkStmt({0xe5e490, 0xc000eeac30})
        /home/johejo/ghq/github.com/golang/go/src/cmd/compile/internal/walk/stmt.go:57 +0x5da
cmd/compile/internal/walk.walkStmtList({0xc002770680, 0x3, 0xc000d1de40})
        /home/johejo/ghq/github.com/golang/go/src/cmd/compile/internal/walk/stmt.go:167 +0x5b
cmd/compile/internal/walk.Walk(0xc000d1de40)
        /home/johejo/ghq/github.com/golang/go/src/cmd/compile/internal/walk/walk.go:43 +0xef
cmd/compile/internal/gc.prepareFunc(0xc000d1de40)
        /home/johejo/ghq/github.com/golang/go/src/cmd/compile/internal/gc/compile.go:92 +0x6d
cmd/compile/internal/gc.enqueueFunc(0xc000d1de40)
        /home/johejo/ghq/github.com/golang/go/src/cmd/compile/internal/gc/compile.go:66 +0x2f7
cmd/compile/internal/gc.Main(0xd19b28)
        /home/johejo/ghq/github.com/golang/go/src/cmd/compile/internal/gc/main.go:292 +0xe5f
main.main()
        /home/johejo/ghq/github.com/golang/go/src/cmd/compile/main.go:55 +0xdd

[gopherbot]

Change https://golang.org/cl/342350 mentions this issue: cmd/compile: fix panic with dead hidden closures