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$ go version go version devel +ea8d7a370d Wed Feb 21 20:32:36 2018 +0000 darwin/amd64 $ GOOS=linux GOARCH=arm64 go build -a -v -gcflags="all=-d=ssa/check/on=1" std cmd errors internal/race unicode/utf8 runtime/internal/sys runtime/internal/atomic sync/atomic unicode math/bits internal/cpu math container/list # unicode/utf8 unicode/utf8/utf8.go:247:12: internal compiler error: likeliness prediction 1 for block b20 with 0 successors goroutine 1 [running]: runtime/debug.Stack(0x0, 0x0, 0x0) /Users/josh/go/tip/src/runtime/debug/stack.go:24 +0xa7 cmd/compile/internal/gc.Fatalf(0x183ea3e, 0x38, 0xc000353e60, 0x3, 0x3) /Users/josh/go/tip/src/cmd/compile/internal/gc/subr.go:182 +0x1fc cmd/compile/internal/gc.(*ssafn).Fatalf(0xc000353620, 0xf70c00000002, 0x183ea3e, 0x38, 0xc000353e60, 0x3, 0x3) /Users/josh/go/tip/src/cmd/compile/internal/gc/ssa.go:5357 +0x67 cmd/compile/internal/ssa.(*Func).Fatalf(0xc0004ac500, 0x183ea3e, 0x38, 0xc000353e60, 0x3, 0x3) /Users/josh/go/tip/src/cmd/compile/internal/ssa/func.go:498 +0x73 cmd/compile/internal/ssa.checkFunc(0xc0004ac500) /Users/josh/go/tip/src/cmd/compile/internal/ssa/check.go:106 +0x22d4 cmd/compile/internal/ssa.Compile(0xc0004ac500) /Users/josh/go/tip/src/cmd/compile/internal/ssa/compile.go:110 +0x36a cmd/compile/internal/gc.buildssa(0xc000078c00, 0x0, 0x0) /Users/josh/go/tip/src/cmd/compile/internal/gc/ssa.go:222 +0xb2f cmd/compile/internal/gc.compileSSA(0xc000078c00, 0x0) /Users/josh/go/tip/src/cmd/compile/internal/gc/pgen.go:238 +0x39 cmd/compile/internal/gc.compile(0xc000078c00) /Users/josh/go/tip/src/cmd/compile/internal/gc/pgen.go:217 +0x1ef cmd/compile/internal/gc.funccompile(0xc000078c00) /Users/josh/go/tip/src/cmd/compile/internal/gc/dcl.go:1040 +0xad cmd/compile/internal/gc.Main(0x1843048) /Users/josh/go/tip/src/cmd/compile/internal/gc/main.go:617 +0x270e main.main() /Users/josh/go/tip/src/cmd/compile/main.go:49 +0x95 container/ring internal/testlog crypto/subtle # math/bits math/bits/bits.go:295:10: internal compiler error: likeliness prediction 1 for block b3 with 0 successors goroutine 1 [running]: runtime/debug.Stack(0x0, 0x0, 0x0) /Users/josh/go/tip/src/runtime/debug/stack.go:24 +0xa7 cmd/compile/internal/gc.Fatalf(0x183ea3e, 0x38, 0xc0002ed5c0, 0x3, 0x3) /Users/josh/go/tip/src/cmd/compile/internal/gc/subr.go:182 +0x1fc cmd/compile/internal/gc.(*ssafn).Fatalf(0xc0002ece70, 0x1270a00000002, 0x183ea3e, 0x38, 0xc0002ed5c0, 0x3, 0x3) /Users/josh/go/tip/src/cmd/compile/internal/gc/ssa.go:5357 +0x67 cmd/compile/internal/ssa.(*Func).Fatalf(0xc00000f400, 0x183ea3e, 0x38, 0xc0002ed5c0, 0x3, 0x3) /Users/josh/go/tip/src/cmd/compile/internal/ssa/func.go:498 +0x73 cmd/compile/internal/ssa.checkFunc(0xc00000f400) /Users/josh/go/tip/src/cmd/compile/internal/ssa/check.go:106 +0x22d4 cmd/compile/internal/ssa.Compile(0xc00000f400) /Users/josh/go/tip/src/cmd/compile/internal/ssa/compile.go:110 +0x36a cmd/compile/internal/gc.buildssa(0xc0003b6300, 0x0, 0x0) /Users/josh/go/tip/src/cmd/compile/internal/gc/ssa.go:222 +0xb2f cmd/compile/internal/gc.compileSSA(0xc0003b6300, 0x0) /Users/josh/go/tip/src/cmd/compile/internal/gc/pgen.go:238 +0x39 cmd/compile/internal/gc.compile(0xc0003b6300) /Users/josh/go/tip/src/cmd/compile/internal/gc/pgen.go:217 +0x1ef cmd/compile/internal/gc.funccompile(0xc0003b6300) /Users/josh/go/tip/src/cmd/compile/internal/gc/dcl.go:1040 +0xad cmd/compile/internal/gc.Main(0x1843048) /Users/josh/go/tip/src/cmd/compile/internal/gc/main.go:617 +0x270e main.main() /Users/josh/go/tip/src/cmd/compile/main.go:49 +0x95 crypto/internal/cipherhw vendor/golang_org/x/crypto/cryptobyte/asn1 internal/nettrace encoding runtime unicode/utf16 image/color internal/syscall/windows internal/syscall/windows/registry internal/syscall/windows/sysdll plugin runtime/race vendor/golang_org/x/text/secure vendor/golang_org/x/text/unicode cmd/compile/internal/test cmd/vendor/github.com/google/pprof/third_party/d3 cmd/vendor/github.com/google/pprof/third_party/d3tip cmd/vendor/github.com/google/pprof/third_party/d3flamegraph cmd/vendor/github.com/google/pprof/third_party/svgpan cmd/vet/internal/whitelist image/color/palette math/cmplx # runtime runtime/env_posix.go:31:17: internal compiler error: likeliness prediction 1 for block b5 with 0 successors goroutine 1 [running]: runtime/debug.Stack(0x0, 0x0, 0x0) /Users/josh/go/tip/src/runtime/debug/stack.go:24 +0xa7 cmd/compile/internal/gc.Fatalf(0x183ea3e, 0x38, 0xc000b4b8f0, 0x3, 0x3) /Users/josh/go/tip/src/cmd/compile/internal/gc/subr.go:182 +0x1fc cmd/compile/internal/gc.(*ssafn).Fatalf(0xc000b4b200, 0x1f1100000018, 0x183ea3e, 0x38, 0xc000b4b8f0, 0x3, 0x3) /Users/josh/go/tip/src/cmd/compile/internal/gc/ssa.go:5357 +0x67 cmd/compile/internal/ssa.(*Func).Fatalf(0xc0029b6000, 0x183ea3e, 0x38, 0xc000b4b8f0, 0x3, 0x3) /Users/josh/go/tip/src/cmd/compile/internal/ssa/func.go:498 +0x73 cmd/compile/internal/ssa.checkFunc(0xc0029b6000) /Users/josh/go/tip/src/cmd/compile/internal/ssa/check.go:106 +0x22d4 cmd/compile/internal/ssa.Compile(0xc0029b6000) /Users/josh/go/tip/src/cmd/compile/internal/ssa/compile.go:110 +0x36a cmd/compile/internal/gc.buildssa(0xc000db9200, 0x0, 0x0) /Users/josh/go/tip/src/cmd/compile/internal/gc/ssa.go:222 +0xb2f cmd/compile/internal/gc.compileSSA(0xc000db9200, 0x0) /Users/josh/go/tip/src/cmd/compile/internal/gc/pgen.go:238 +0x39 cmd/compile/internal/gc.compile(0xc000db9200) /Users/josh/go/tip/src/cmd/compile/internal/gc/pgen.go:217 +0x1ef cmd/compile/internal/gc.funccompile(0xc000db9200) /Users/josh/go/tip/src/cmd/compile/internal/gc/dcl.go:1040 +0xad cmd/compile/internal/gc.Main(0x1843048) /Users/josh/go/tip/src/cmd/compile/internal/gc/main.go:617 +0x270e main.main() /Users/josh/go/tip/src/cmd/compile/main.go:49 +0x95
Probably due to https://go-review.googlesource.com/c/go/+/55670, but I haven't checked.
cc @philhofer
The text was updated successfully, but these errors were encountered:
Seems likely. Investigating.
Sorry, something went wrong.
Yeah, the fix is simple:
diff --git a/src/cmd/compile/internal/ssa/branchelim.go b/src/cmd/compile/internal/ssa/branchelim.go index a37b8f06e1..54508985b3 100644 --- a/src/cmd/compile/internal/ssa/branchelim.go +++ b/src/cmd/compile/internal/ssa/branchelim.go @@ -139,6 +139,7 @@ func clobberBlock(b *Block) { b.Succs = nil b.Aux = nil b.SetControl(nil) + b.Likely = BranchUnknown b.Kind = BlockInvalid }
ssacheck is looking at an unreachable block, which the branchelim pass doesn't clobber effectively enough
I'll send a CL
Change https://golang.org/cl/96075 mentions this issue: cmd/compile/internal/ssa: clear branch likeliness in clobberBlock
cmd/compile/internal/ssa: clear branch likeliness in clobberBlock
8178664
No branches or pull requests
Probably due to https://go-review.googlesource.com/c/go/+/55670, but I haven't checked.
cc @philhofer
The text was updated successfully, but these errors were encountered: