cmd/link: panic: slice bounds out of range

[crawshaw]

At tip, this program does not link:

package main

import "words_words_words"

var M map[words_words_words.WordWord]struct {
    possibleFirstWord          words_words_words.WordWord
    wordsAndWords              int32
    initiatingAbWord           words_words_words.AbWord
    isWordsWordsWords          bool
    cancelWordToWord           bool
    isWordWordWordWordWordWord bool
    isWordWordWord             bool
}

var I interface{}

func main() {
    I = M
}

Where package words_words_words is defined as:

package words_words_words

type WordWord int32

type AbWord int32

The linker panics:

panic: runtime error: slice bounds out of range

goroutine 52 [running]:
panic(0x184760, 0xc820012140)
    /Users/crawshaw/go/src/runtime/panic.go:500 +0x18c
cmd/link/internal/ld.decodetype_str(0xc820500380, 0xc820d4200b, 0x3)
    /Users/crawshaw/go/src/cmd/link/internal/ld/decodesym.go:229 +0xad
cmd/link/internal/ld.dodataSect(0x13, 0xc820ca8000, 0x1b7, 0x1b7, 0x0, 0x0, 0x0, 0x0)
    /Users/crawshaw/go/src/cmd/link/internal/ld/data.go:1835 +0x1c7
cmd/link/internal/ld.dodata.func1(0xc820c90000, 0x13, 0xc8206c6a20, 0xc820b8fc30)
    /Users/crawshaw/go/src/cmd/link/internal/ld/data.go:1318 +0x63
created by cmd/link/internal/ld.dodata
    /Users/crawshaw/go/src/cmd/link/internal/ld/data.go:1320 +0x6bb

[robpike]

That's a lot of words.