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gccgo: go1: internal compiler error: in type_index, at go/gofrontend/export.cc:1284 #51291

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zhsj opened this issue Feb 21, 2022 · 2 comments
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gccgo: go1: internal compiler error: in type_index, at go/gofrontend/export.cc:1284 #51291

zhsj opened this issue Feb 21, 2022 · 2 comments
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FrozenDueToAge NeedsInvestigation Someone must examine and confirm this is a valid issue and not a duplicate of an existing one.
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Gccgo

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@zhsj
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zhsj commented Feb 21, 2022

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

$ go version
go version go1.16.5 gccgo (Debian 11.2.0-16) 11.2.0 linux/amd64

Does this issue reproduce with the latest release?

Yes. Also verified with gcc snapshot 20220126.

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

go env Output
$ go env
GO111MODULE=""
GOARCH="amd64"
GOBIN=""
GOCACHE="/home/zhsj/.cache/go-build"
GOENV="/home/zhsj/.config/go/env"
GOEXE=""
GOFLAGS=""
GOHOSTARCH="amd64"
GOHOSTOS="linux"
GOINSECURE=""
GOMODCACHE="/home/zhsj/go/pkg/mod"
GONOPROXY=""
GONOSUMDB=""
GOOS="linux"
GOPATH="/home/zhsj/go"
GOPRIVATE=""
GOPROXY="https://goproxy.cn"
GOROOT="/usr"
GOSUMDB="sum.golang.google.cn"
GOTMPDIR=""
GOTOOLDIR="/usr/lib/gcc/x86_64-linux-gnu/11"
GOVCS=""
GOVERSION="go1.16.5 gccgo (Debian 11.2.0-16) 11.2.0"
GCCGO="/usr/bin/x86_64-linux-gnu-gccgo-11"
AR="ar"
CC="x86_64-linux-gnu-gcc-11"
CXX="x86_64-linux-gnu-g++-11"
CGO_ENABLED="1"
GOMOD="/tmp/t/go.mod"
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 -fmessage-length=0 -fdebug-prefix-map=/tmp/go-build2634712924=/tmp/go-build -gno-record-gcc-switches -funwind-tables"

What did you do?

Build following code.

==> ./test.go <==
package t

import "t/t2"

type TypeA string

const StrA TypeA = TypeA(t2.StrB)

==> ./t2/test.go <==
package t2

type TypeB string

const StrB TypeB = "s"

==> ./go.mod <==
module t

go 1.16

What did you expect to see?

No error

What did you see instead?

go1: internal compiler error: in type_index, at go/gofrontend/export.cc:1284
0xd79611 internal_error(char const*, ...)
        ???:0
0xd768d0 fancy_abort(char const*, int, char const*)
        ???:0
0x1423cd2 Expression::export_constant_type(Export_function_body*, Type*)
        ???:0
0x1423db5 String_expression::do_export(Export_function_body*) const
        ???:0
0x1423fc7 Type_conversion_expression::do_export(Export_function_body*) const
        ???:0
0x1488c7a Named_constant::export_const(Export*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&) const
        ???:0
0x146e7e6 go_parse_input_files(char const**, unsigned int, bool, bool)
        ???:0
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <file:///usr/share/doc/gcc-11/README.Bugs> for instructions.
@gopherbot gopherbot added this to the Gccgo milestone Feb 21, 2022
@ianlancetaylor ianlancetaylor added the NeedsInvestigation Someone must examine and confirm this is a valid issue and not a duplicate of an existing one. label Feb 21, 2022
@ianlancetaylor ianlancetaylor self-assigned this Feb 21, 2022
@gopherbot
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Change https://go.dev/cl/405976 mentions this issue: compiler: traverse expressions when exporting constants

@gopherbot
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Change https://go.dev/cl/406916 mentions this issue: test: add test that caused a gofrontend crash

gopherbot pushed a commit that referenced this issue May 18, 2022
@ianlancetaylor
test: add test that caused a gofrontend crash
1c6706c 
For #51291

Change-Id: If47e4cbf899853ade5050852c3870b9500da4c63
Reviewed-on: https://go-review.googlesource.com/c/go/+/406916
Run-TryBot: Ian Lance Taylor <[email protected]>
Reviewed-by: Cherry Mui <[email protected]>
TryBot-Result: Gopher Robot <[email protected]>
Reviewed-by: Than McIntosh <[email protected]>
xionghul pushed a commit to xionghul/gcc that referenced this issue May 19, 2022
@ianlancetaylor
compiler: traverse expressions when exporting constants
b8944f0 
When exporting a constant A that is expressed through a constant
B from another package, it is necessary to traverse an expression
representing the constant A to generate a sequence of type casts
from the constant B. Current implementation doesn't collect types
of constants contained in such expressions. This change fetches
these types.

Fixes golang/go#51291

Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/405976
realqhc pushed a commit to realqhc/gofrontend that referenced this issue Aug 4, 2022
@realqhc
compiler: traverse expressions when exporting constants
b6ad3a5 
When exporting a constant A that is expressed through a constant
B from another package, it is necessary to traverse an expression
representing the constant A to generate a sequence of type casts
from the constant B. Current implementation doesn't collect types
of constants contained in such expressions. This change fetches
these types.

Fixes golang/go#51291

Change-Id: I0f0922a4fa3dd82c18d8cfce7eb83ed98a642505
Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/405976
Reviewed-by: Ian Lance Taylor <[email protected]>
Reviewed-by: Than McIntosh <[email protected]>
Reviewed-by: Ian Lance Taylor <[email protected]>
@golang golang locked and limited conversation to collaborators Jun 22, 2023
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