GoRun shows a blank line in quickfix window when panic is received

[preslavmihaylov]

What did you do? (required: The issue will be closed when not provided)

Given the following source file:

package main

import "fmt"

func main() {
	fmt.Println("vim-go")
	panic("err")
}

I typed :GoRun.

What did you expect to happen?

Quickfix window opens with line that failed + output showing the panic.

What happened instead?

Quickfix window opens with a blank line & pointer to line that failed.

Configuration (MUST fill this out):

vim-go version:

vim-go @ 3e9a292

vimrc you used to reproduce (use a minimal vimrc with other plugins disabled; do not link to a 2,000 line vimrc):

vimrc

""" -------------------- vim-go -------------------------
" all errors are shown in the quickfix window
let g:go_list_type = "quickfix"
" automatically add import paths when saving file

"let g:go_fmt_command = "goimports"
" enable syntax highlighting

let g:go_highlight_types = 1

let g:go_highlight_fields = 1

let g:go_highlight_functions = 1

let g:go_highlight_function_calls = 1

let g:go_highlight_operators = 1

let g:go_highlight_extra_types = 1

let g:go_highlight_build_constraints = 1

let g:go_highlight_generate_tags = 1
" enable go metalinter

let g:go_metalinter_enabled = ['vet', 'golint', 'errcheck']
" let g:go_metalinter_autosave_enabled = ['vet', 'golint', 'errcheck']

let g:go_metalinter_autosave_enabled = ['vet', 'errcheck']

let g:go_metalinter_autosave = 1
" automatically show GoInfo output

" let g:go_auto_type_info = 1
" automatically highlight variable your cursor is on

let g:go_auto_sameids = 1
" adjust quickfix window height

let g:go_list_height = 8
" terminal opens as a horizontal split below the main window

let g:go_term_mode = "split above"
" More verbose output on failed tests in quickfix window

let g:go_test_show_name = 1

Vim version (first three lines from :version):

NVIM v0.3.4
Build type: Release
LuaJIT 2.1.0-beta3

Go version (go version):

go version go1.11.4 linux/amd64

Go environment

go env Output:

GOARCH="amd64"
GOBIN=""
GOCACHE="/home/pmihaylov/.cache/go-build"
GOEXE=""
GOFLAGS=""
GOHOSTARCH="amd64"
GOHOSTOS="linux"
GOOS="linux"
GOPATH="/home/pmihaylov/programming/go"
GOPROXY=""
GORACE=""
GOROOT="/usr/local/go"
GOTMPDIR=""
GOTOOLDIR="/usr/local/go/pkg/tool/linux_amd64"
GCCGO="gccgo"
CC="gcc"
CXX="g++"
CGO_ENABLED="1"
GOMOD=""
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-build861316129=/tmp/go-build -gno-record-gcc-switches"

[bhcleek]

vim-go won't parse the panic output, because there isn't a reliable way to tell non-panic output from the panic output, especially if there's a substantial output.

vim-go really shouldn't show any errors unless the exit code from go run is 2; that's the exit code when there's a problem compiling what's being go run. If the exit code is 1, then there was an error at runtime.

[preslavmihaylov]

Can we at least then show a generic message in the quickfix window line, such as runtime error occurred.

I actually noticed that vim-go showed the line, where the runtime error occurred while writing this issue.
I believe an explicit message will make it easier for users to detect where the problem is rather than a blank line.

[bhcleek]

Yes. I'm planning to refactor the :GoRun so that it will parse compilation errors if there are any, but leave the runtime errors as output in the usual window that holds the output.