pprof: Channel error on amd64 and arm64 with web UI

[shawndx]

Please answer these questions before submitting your issue. Thanks!

What version of pprof are you using?

If you are using pprof via go tool pprof, what's your go env output?
If you run pprof from GitHub, what's the Git revision?

GO111MODULE=""
GOARCH="amd64"
GOBIN=""
GOCACHE="/home/xiaji01/.cache/go-build"
GOENV="/home/xiaji01/.config/go/env"
GOEXE=""
GOFLAGS=""
GOHOSTARCH="amd64"
GOHOSTOS="linux"
GOINSECURE=""
GONOPROXY=""
GONOSUMDB=""
GOOS="linux"
GOPATH="/home/xiaji01/.go"
GOPRIVATE=""
GOPROXY="https://proxy.golang.org,direct"
GOROOT="/home/xiaji01/src/bench/go.x86"
GOSUMDB="sum.golang.org"
GOTMPDIR="/home/xiaji01/data/depot/tmpdir"
GOTOOLDIR="/home/xiaji01/src/bench/go.x86/pkg/tool/linux_amd64"
GCCGO="gccgo"
AR="ar"
CC="gcc"
CXX="g++"
CGO_ENABLED="1"
GOMOD="/home/xiaji01/src/bench/go.x86/src/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=/home/xiaji01/data/depot/tmpdir/go-build568507879=/tmp/go-build -gno-record-gcc-switches"

What operating system and processor architecture are you using?

$ cat /proc/version
Linux version 4.4.0-154-generic (buildd@lgw01-amd64-049) (gcc version 5.4.0 20160609 (Ubuntu 5.4.0-6ubuntu1~16.04.10) ) #181-Ubuntu SMP Tue Jun 25 05:29:03 UTC 2019

$ lscpu
Architecture: x86_64
CPU op-mode(s): 32-bit, 64-bit
Byte Order: Little Endian

What did you do?

If possible, provide a recipe for reproducing the error.
Attaching a profile you are trying to analyze is good.

go tool pprof -http=127.0.0.1:2222 <prof.out>

What did you expect to see?

everything works fine

What did you see instead?

browser (firefox) crashes, and the following error message were shown in server side:

Serving web UI on http://127.0.0.1:2222
ExceptionHandler::GenerateDump cloned child 25517
ExceptionHandler::SendContinueSignalToChild sent continue signal to child
ExceptionHandler::WaitForContinueSignal waiting for continue signal...
[Parent 25275, Gecko_IOThread] WARNING: pipe error (52): Connection reset by peer: file /build/firefox-ubqoiK/firefox-67.0.4+build1/ipc/chromium/src/chrome/common/ipc_channel_posix.cc, line 357
[Parent 25275, Gecko_IOThread] WARNING: pipe error (54): Connection reset by peer: file /build/firefox-ubqoiK/firefox-67.0.4+build1/ipc/chromium/src/chrome/common/ipc_channel_posix.cc, line 357

###!!! [Parent][MessageChannel] Error: (msgtype=0x1F0088,name=PBrowser::Msg_Destroy) Channel error: cannot send/recv

[shawndx]

I got the issue on both arm64 and amd64 platforms, error messages are nearly identical. Thanks.