Use of net/http causes build failures due to redeclaration [arm6l] [v1.12.5]

[rvprasad]

Please file a new issue at golang.org/issue/new using this template:

Please answer these questions before submitting your issue. Thanks!

What did you do?

If possible, provide a recipe for reproducing the error.
A complete runnable program is good.
A link on play.golang.org is best.

https://play.golang.org/p/wdFUb7EqkCh fails to build on Raspberry Pi 3B model. The issue occurred in go v1.12.5 but not in go v1.12.4 or v1.11.10.

What did you expect to see?

I expected the creation of an executable named temp in folder temp.

What did you see instead?

The build failed with the following errors.

$ go build
# crypto/rc4
/opt/go/src/crypto/rc4/rc4_asm.go:15:18: (*Cipher).XORKeyStream redeclared in this block
        previous declaration at /opt/go/src/crypto/rc4/rc4.go:61:6
# crypto/cipher
/opt/go/src/crypto/cipher/xor_generic.go:16:6: xorBytes redeclared in this block
        previous declaration at /opt/go/src/crypto/cipher/xor.go:58:33
/opt/go/src/crypto/cipher/xor_generic.go:27:15: too many arguments in call to fastXORBytes
        have ([]byte, []byte, []byte, int)
        want ([]byte, []byte, []byte)
/opt/go/src/crypto/cipher/xor_generic.go:34:15: too many arguments in call to safeXORBytes
        have ([]byte, []byte, []byte, int)
        want ([]byte, []byte, []byte)
/opt/go/src/crypto/cipher/xor_generic.go:39:7: wordSize redeclared in this block
        previous declaration at /opt/go/src/crypto/cipher/xor.go:12:44
/opt/go/src/crypto/cipher/xor_generic.go:40:7: supportsUnaligned redeclared in this block
        previous declaration at /opt/go/src/crypto/cipher/xor.go:13:161
/opt/go/src/crypto/cipher/xor_generic.go:45:6: fastXORBytes redeclared in this block
        previous declaration at /opt/go/src/crypto/cipher/xor.go:17:37
/opt/go/src/crypto/cipher/xor_generic.go:65:6: safeXORBytes redeclared in this block
        previous declaration at /opt/go/src/crypto/cipher/xor.go:45:37
/opt/go/src/crypto/cipher/xor_generic.go:73:6: fastXORWords redeclared in this block
        previous declaration at /opt/go/src/crypto/cipher/xor.go:73:31
/opt/go/src/crypto/cipher/xor_generic.go:85:6: xorWords redeclared in this block
        previous declaration at /opt/go/src/crypto/cipher/xor.go:83:27
# bytes
/opt/go/src/bytes/bytes_decl.go:10:6: IndexByte redeclared in this block
        previous declaration at /opt/go/src/bytes/bytes.go:101:34
/opt/go/src/bytes/bytes_decl.go:17:6: Equal redeclared in this block
        previous declaration at /opt/go/src/bytes/bytes.go:18:25
/opt/go/src/bytes/bytes_decl.go:24:6: Compare redeclared in this block
        previous declaration at /opt/go/src/bytes/bytes.go:37:27
# strings
/opt/go/src/strings/strings_decl.go:8:6: IndexByte redeclared in this block
        previous declaration at /opt/go/src/strings/strings.go:150:34

System details

go version go1.12.5 linux/arm
GOARCH="arm"
GOBIN=""
GOCACHE="/home/life/.cache/go-build"
GOEXE=""
GOFLAGS=""
GOHOSTARCH="arm"
GOHOSTOS="linux"
GOOS="linux"
GOPATH="/home/life/go"
GOPROXY=""
GORACE=""
GOROOT="/opt/go"
GOTMPDIR=""
GOTOOLDIR="/opt/go/pkg/tool/linux_arm"
GCCGO="gccgo"
GOARM="6"
CC="gcc"
CXX="g++"
CGO_ENABLED="1"
GOMOD=""
uname -sr: Linux 4.14.34-hypriotos-v7+
Distributor ID:	Raspbian
Description:	Raspbian GNU/Linux 9.9 (stretch)
Release:	9.9
Codename:	stretch
/lib/arm-linux-gnueabihf/libc.so.6: GNU C Library (Debian GLIBC 2.24-11+deb9u4) stable release version 2.24, by Roland McGrath et al.

[agnivade]

I am unable to reproduce this by cross-compiling.

These type of errors usually occur when you have multiple conflicting Go installations. Have you tried wiping your entire GOROOT (/opt/go) and try installing Go 1.12.5 again ?

[rvprasad]

Wiping the entire GOROOT and reinstalling fixed the issue. Sorry about the false alarm and thank you :)