go: cmd/compile: excessively slow compile for 60K lines function

The go 1.6 compiler panics on this 2.25 Mbyte source file containing a slice with 13240 elements: https://drive.google.com/file/d/0B2AF520HhpuzdzZhSVpPZGZkTUU/view

go1.6 linux/amd64 GOARCH=“amd64” GOOS=“linux”

$ go build buildme.go
# command-line-arguments
panic: runtime error: makeslice: len out of range

goroutine 1 [running]:
panic(0x804f60, 0xc86085dd70)
        /usr/lib/google-golang/src/runtime/panic.go:483 +0x3ef
cmd/compile/internal/gc.newliveness(0xc82018b9e0, 0xc8200a0000, 0xc865c44000, 0x2d416, 0x2e400, 0xc866950000, 0xcee1, 0xf000, 0xc9cda4b11aac74db)
        /usr/lib/google-golang/src/cmd/compile/internal/gc/plive.go:687 +0x161
cmd/compile/internal/gc.liveness(0xc82018b9e0, 0xc8200a0000, 0xc848dee900, 0xc848dee980)
        /usr/lib/google-golang/src/cmd/compile/internal/gc/plive.go:1782 +0x2cf
cmd/compile/internal/gc.compile(0xc82018b9e0)
        /usr/lib/google-golang/src/cmd/compile/internal/gc/pgen.go:541 +0xdf2
cmd/compile/internal/gc.funccompile(0xc82018b9e0)
        /usr/lib/google-golang/src/cmd/compile/internal/gc/dcl.go:1450 +0x1c0
cmd/compile/internal/gc.Main()
        /usr/lib/google-golang/src/cmd/compile/internal/gc/lex.go:472 +0x2116
cmd/compile/internal/amd64.Main()
        /usr/lib/google-golang/src/cmd/compile/internal/amd64/galign.go:127 +0x58d
main.main()
        /usr/lib/google-golang/src/cmd/compile/main.go:32 +0x395