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cmd/compile: internal compiler error: 'New': can't find source #32681

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chanxuehong opened this issue Jun 19, 2019 · 2 comments
Closed

cmd/compile: internal compiler error: 'New': can't find source #32681

chanxuehong opened this issue Jun 19, 2019 · 2 comments
Labels
FrozenDueToAge NeedsInvestigation Someone must examine and confirm this is a valid issue and not a duplicate of an existing one. release-blocker
Milestone
Go1.13

Comments

@chanxuehong
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chanxuehong commented Jun 19, 2019 •
edited

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

go version go1.12.6 darwin/amd64

Does this issue reproduce with the latest release?

Yes

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

go env Output
GOARCH="amd64"
GOBIN=""
GOCACHE="/Users/chan/Library/Caches/go-build"
GOEXE=""
GOFLAGS=""
GOHOSTARCH="amd64"
GOHOSTOS="darwin"
GOOS="darwin"
GOPATH="/Users/chan/gopath"
GOPROXY=""
GORACE=""
GOROOT="/usr/local/go"
GOTMPDIR=""
GOTOOLDIR="/usr/local/go/pkg/tool/darwin_amd64"
GCCGO="gccgo"
CC="clang"
CXX="clang++"
CGO_ENABLED="1"
GOMOD="/dev/null"
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 -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=/var/folders/qw/ddvmdjjd35xcj6823_nz3z780000gn/T/go-build028699097=/tmp/go-build -gno-record-gcc-switches -fno-common"

What did you do?

package main

import (
	"fmt"
)

func main() {
	fmt.Println(New().info)
}

type interfaceImpl struct {
	info [256]uint32
}

func New() *interfaceImpl {
	p := interfaceImpl{}
	for k := 0; k < 256; k++ {
		i := k*8 + 4
		if k == 0 {
			fmt.Println("debug")
		}
		p.info[k] = readLittleEndian32(data[i], data[i+1], data[i+2], data[i+3])
	}
	return &p
}

func readLittleEndian32(a, b, c, d byte) uint32 {
	return uint32(a) | (uint32(b) << 8) | (uint32(c) << 16) | (uint32(d) << 24)
}

var data = []byte{
	112, 1, 250, 10, 146, 254, 150, 46, 114, 115, 40, 141, 42, 144, 93, 5, 124, 166, 33, 115, 46, 36, 167, 13, 104, 240, 64, 6, 72, 10, 56, 108,
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	83, 241, 54, 85, 96, 66, 200, 157, 182, 48, 232, 139, 122, 158, 16, 239, 67, 103, 100, 225, 121, 28, 221, 158, 191, 234, 125, 9, 215, 80, 167, 138,
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	187, 170, 33, 198, 206, 8, 110, 170, 218, 189, 235, 181, 141, 120, 51, 190, 133, 44, 109, 150, 11, 105, 154, 241, 249, 200, 223, 116, 154, 66, 209, 240,
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	75, 32, 93, 150, 192, 207, 173, 29, 81, 139, 245, 116, 126, 93, 7, 196, 107, 205, 192, 214, 175, 25, 54, 246, 7, 226, 64, 85, 166, 28, 205, 89,
	124, 90, 133, 18, 112, 81, 30, 36, 170, 37, 229, 174, 118, 213, 86, 143, 75, 242, 176, 48, 245, 229, 13, 26, 103, 162, 49, 26, 223, 254, 59, 212,
	153, 223, 21, 58, 17, 171, 42, 66, 203, 185, 249, 74, 66, 63, 177, 7, 184, 25, 130, 29, 162, 34, 17, 118, 192, 110, 4, 247, 158, 169, 103, 38,
	91, 90, 16, 105, 205, 70, 230, 224, 94, 37, 14, 27, 175, 171, 23, 67, 180, 44, 79, 2, 142, 130, 205, 72, 208, 99, 78, 77, 185, 137, 70, 160,
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	101, 101, 65, 8, 23, 18, 7, 62, 150, 190, 111, 164, 212, 78, 219, 114, 175, 166, 53, 61, 231, 19, 6, 143, 160, 225, 61, 106, 12, 182, 93, 106,
	14, 186, 59, 80, 134, 221, 38, 90, 152, 15, 132, 7, 58, 89, 191, 140, 173, 49, 140, 200, 59, 149, 110, 49, 139, 97, 24, 242, 110, 209, 13, 252,
	219, 120, 40, 160, 73, 44, 81, 203, 207, 247, 83, 45, 34, 171, 140, 143, 102, 238, 163, 139, 254, 28, 65, 230, 59, 94, 187, 238, 39, 240, 95, 113,
	201, 22, 67, 176, 223, 244, 98, 175, 114, 79, 133, 105, 244, 29, 216, 128, 23, 58, 234, 232, 124, 199, 62, 25, 216, 213, 94, 216, 184, 230, 57, 54,
	81, 206, 1, 156, 58, 231, 134, 16, 32, 39, 63, 97, 148, 159, 245, 146, 218, 227, 87, 170, 191, 233, 147, 37, 62, 62, 172, 106, 214, 103, 64, 125,
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	161, 185, 192, 100, 134, 248, 177, 168, 172, 149, 211, 172, 238, 166, 12, 46, 171, 230, 130, 43, 51, 205, 186, 90, 199, 37, 197, 86, 181, 235, 203, 127,
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	139, 20, 172, 241, 246, 114, 194, 234, 14, 205, 44, 137, 13, 253, 252, 101, 250, 170, 36, 68, 199, 229, 69, 32, 74, 167, 218, 225, 145, 246, 220, 39,
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}

What did you expect to see?

build success

What did you see instead?

./main.go:17:2: internal compiler error: 'New': can't find source for b10->b6: v26 = MOVWloadidx1 <uint32> [4] v130 v37 v66 : CX


Please file a bug report including a short program that triggers the error.
https://golang.org/issue/new

if remove the code below, it will be ok.

		if k == 0 {
			fmt.Println("debug")
		}
@ALTree
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ALTree commented Jun 19, 2019 •
edited

Thanks for the report.

I can reproduce this with tip and with 1.12.5 (so it's not a 1.12.6 regression).

cc @randall77

@ALTree ALTree added this to the Go1.13 milestone Jun 19, 2019
@ALTree ALTree added NeedsInvestigation Someone must examine and confirm this is a valid issue and not a duplicate of an existing one. release-blocker labels Jun 19, 2019
@ALTree ALTree changed the title build failed for go1.12.6 cmd/compile: 'New': can't find source Jun 19, 2019
@ALTree ALTree changed the title cmd/compile: 'New': can't find source cmd/compile: internal compiler error: 'New': can't find source Jun 19, 2019
@agnivade
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Fixed at tip now.

@golang golang locked and limited conversation to collaborators Jun 21, 2020
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