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cmd/link: panic with empty or short -B argument #14636

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rhysh opened this issue Mar 4, 2016 · 1 comment
Closed

cmd/link: panic with empty or short -B argument #14636

rhysh opened this issue Mar 4, 2016 · 1 comment
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Go1.7

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@rhysh
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rhysh commented Mar 4, 2016

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

go version go1.6 darwin/amd64

What did you do?
What did you see instead?

$ go tool link -B ''
panic: runtime error: index out of range

goroutine 1 [running]:
panic(0x236380, 0x82040e0f0)
    /usr/local/go/src/runtime/panic.go:464 +0x3e6
cmd/link/internal/ld.addbuildinfo(0x7fff5fbffb50, 0x0)
    /usr/local/go/src/cmd/link/internal/ld/elf.go:1205 +0x98d
cmd/internal/obj.fn1.Set(0x2dc1f0, 0x7fff5fbffb50, 0x0, 0x0, 0x0)
    /usr/local/go/src/cmd/internal/obj/flag.go:116 +0x3c
flag.(*FlagSet).parseOne(0x82047c000, 0x8204a0b80, 0x0, 0x0)
    /usr/local/go/src/flag/flag.go:881 +0xdd9
flag.(*FlagSet).Parse(0x82047c000, 0x8204a0b90, 0x2, 0x3, 0x0, 0x0)
    /usr/local/go/src/flag/flag.go:900 +0x6e
flag.Parse()
    /usr/local/go/src/flag/flag.go:928 +0x6f
cmd/internal/obj.Flagparse(0x2dc2a0)
    /usr/local/go/src/cmd/internal/obj/flag.go:49 +0x2d
cmd/link/internal/ld.Ldmain()
    /usr/local/go/src/cmd/link/internal/ld/pobj.go:149 +0x14cc
cmd/link/internal/amd64.Main()
    /usr/local/go/src/cmd/link/internal/amd64/obj.go:44 +0x19
main.main()
    /usr/local/go/src/cmd/link/main.go:27 +0x36f

What did you expect to see?

I'd expect no panic, and an error message of -B argument must start with 0x:.
@minux minux added this to the Go1.7 milestone Mar 4, 2016
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CL https://golang.org/cl/20211 mentions this issue.

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