gccgo: internal compiler error type_descriptor_backend_name building net/trace #68734
Description
Go version
go version go1.18 gccgo (Debian 14.1.0-5) 14.1.0 linux/arm64
Output of go env in your module/workspace:
GO111MODULE=""
GOARCH="arm64"
GOBIN=""
GOCACHE="/root/.cache/go-build"
GOENV="/root/.config/go/env"
GOEXE=""
GOEXPERIMENT="fieldtrack"
GOFLAGS=""
GOHOSTARCH="arm64"
GOHOSTOS="linux"
GOINSECURE=""
GOMODCACHE="/root/go/pkg/mod"
GONOPROXY=""
GONOSUMDB=""
GOOS="linux"
GOPATH="/root/go"
GOPRIVATE=""
GOPROXY="https://proxy.golang.org,direct"
GOROOT="/usr"
GOSUMDB="sum.golang.org"
GOTMPDIR=""
GOTOOLDIR="/usr/libexec/gcc/aarch64-linux-gnu/14"
GOVCS=""
GOVERSION="go1.18 gccgo (Debian 14.1.0-5) 14.1.0"
GCCGO="/usr/bin/aarch64-linux-gnu-gccgo-14"
AR="ar"
CC="aarch64-linux-gnu-gcc-14"
CXX="aarch64-linux-gnu-g++-14"
CGO_ENABLED="1"
GOMOD="/dev/null"
GOWORK=""
CGO_CFLAGS="-g -O2"
CGO_CPPFLAGS=""
CGO_CXXFLAGS="-g -O2"
CGO_FFLAGS="-g -O2"
CGO_LDFLAGS="-g -O2"
PKG_CONFIG="pkg-config"
GOGCCFLAGS="-fPIC -pthread -fmessage-length=0 -fdebug-prefix-map=/tmp/go-build2148568519=/tmp/go-build -gno-record-gcc-switches -funwind-tables"What did you do?
I've noticed that on the gccgo-14 release that the net/trace library no longer compiles. A simple docker setup:
from debian:sid
run apt-get update && apt-get install -y gccgo-go git
run cd /tmp && git clone https://github.com/golang/net.git && cd net && go build ./...What did you see happen?
When I build the project I get back the following stack-trace:
# go build ./...
go: downloading golang.org/x/term v0.22.0
go: downloading golang.org/x/text v0.16.0
go: downloading golang.org/x/sys v0.22.0
# golang.org/x/net/trace
go1: internal compiler error: in type_descriptor_backend_name, at go/gofrontend/names.cc:1099
0xd064ff internal_error(char const*, ...)
???:0
0xd065eb fancy_abort(char const*, int, char const*)
???:0
0x18ff0ef Gogo::type_descriptor_backend_name(Type const*, Named_type*, Backend_name*)
???:0
0x1928c1f Type::make_type_descriptor_var(Gogo*)
???:0
0x19292ef Type::type_descriptor_pointer(Gogo*, Location)
???:0
0x18a1f0f Interface_value_expression::do_get_backend(Translate_context*)
???:0
0x187e56f Type_conversion_expression::do_get_backend(Translate_context*)
???:0
0x1919cdf Temporary_statement::do_get_backend(Translate_context*)
???:0
0x18d932f Block::get_backend(Translate_context*)
???:0
0x1921e4f If_statement::do_get_backend(Translate_context*)
???:0
0x18d932f Block::get_backend(Translate_context*)
???:0
0x191a947 Block_statement::do_get_backend(Translate_context*)
???:0
0x18d932f Block::get_backend(Translate_context*)
???:0
0x18d9767 Function::build(Gogo*, Named_object*)
???:0
0x18dab63 Gogo::write_globals()
???:0
Please submit a full bug report, with preprocessed source (by using -freport-bug).
Please include the complete backtrace with any bug report.
See <file:///usr/share/doc/gcc-14/README.Bugs> for instructions.
What did you expect to see?
This seems to be some sort of regression. Using gccgo-13 I was able to build the project successfully.
This test was running from an arm macbook via docker, but I have also seen this issue running on linux/amd64, on an internally built version of gccgo-14 .
Note: I'm sure if this is the place to raise this issue, or if there is a better place in the gcc project to submit such issues. I will close the ticket if there is a more appropriate bug tracker to raise this issue.