cmd/asm: panic for duplicated TEXT

[WojciechMula]

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

$ go version
go version go1.18.1 linux/amd64

Does this issue reproduce with the latest release?

Don't know

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

go env Output

$ go env
GO111MODULE=""
GOARCH="amd64"
GOBIN=""
GOCACHE="/home/wojtek/.cache/go-build"
GOENV="/home/wojtek/.config/go/env"
GOEXE=""
GOEXPERIMENT=""
GOFLAGS=""
GOHOSTARCH="amd64"
GOHOSTOS="linux"
GOINSECURE=""
GOMODCACHE="/home/wojtek/go/pkg/mod"
GONOPROXY=""
GONOSUMDB=""
GOOS="linux"
GOPATH="/home/wojtek/go"
GOPRIVATE=""
GOPROXY="https://proxy.golang.org,direct"
GOROOT="/usr/lib/go-1.18"
GOSUMDB="sum.golang.org"
GOTMPDIR=""
GOTOOLDIR="/usr/lib/go-1.18/pkg/tool/linux_amd64"
GOVCS=""
GOVERSION="go1.18.1"
GCCGO="gccgo"
GOAMD64="v1"
AR="ar"
CC="gcc"
CXX="g++"
CGO_ENABLED="1"
GOMOD="/dev/null"
GOWORK=""
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-build1603123293=/tmp/go-build -gno-record-gcc-switches"

What did you do?

Assemble a program with duplicated procedures.

TEXT foo(SB), 0, $0
    RET

TEXT foo(SB), 0, $0
    RET

What did you expect to see?

A descriptive error message.

What did you see instead?

Panic

~/tmp$ go build
# main
asm: InitTextSym double init for foo
panic: invalid use of LSym - NewFuncInfo with Extra of type *obj.FuncInfo

goroutine 1 [running]:
cmd/internal/obj.(*LSym).NewFuncInfo(0x5c1f6a?)
	/usr/lib/go-1.18/src/cmd/internal/obj/link.go:498 +0xf4
cmd/internal/obj.(*Link).InitTextSym(0xc000100200, 0xc0000e8100, 0x0)
	/usr/lib/go-1.18/src/cmd/internal/obj/plist.go:170 +0xf6
cmd/asm/internal/asm.(*Parser).asmText(0xc0000cbe78, {0xc0000cbd18, 0x3, 0x0?})
	/usr/lib/go-1.18/src/cmd/asm/internal/asm/asm.go:180 +0x4fd
cmd/asm/internal/asm.(*Parser).pseudo(0xc0000cbe78?, {0xc0000bc170?, 0xc0000bc167?}, {0xc0000cbd18?, 0x0?, 0x0?})
	/usr/lib/go-1.18/src/cmd/asm/internal/asm/parse.go:297 +0x54
cmd/asm/internal/asm.(*Parser).Parse(0xc0000cbe78)
	/usr/lib/go-1.18/src/cmd/asm/internal/asm/parse.go:105 +0xd6
main.main()
	/usr/lib/go-1.18/src/cmd/asm/main.go:92 +0x7b6