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I am trying to debug go-ethereum code inside the Visual Studio Code. So far I was able to build debug version of binaries by modifying the Makefile and run the project inside the VS Code with "Rich Go" extension installed.

Entry to the MakeFile:

debug:
 # https://ethereum.stackexchange.com/questions/41489/how-to-debug-geth-with-delve?rq=1
 @echo building debug version
 build/env.sh go build -o ./build/bin/geth -gcflags=all='-N -l' -v ./cmd/geth
 @echo end building debug version
 @echo "Run "$(GOBIN)/geth" to launch geth."

My launch.json file is:

 
 "name": "Launch",
 "type": "go",
 "request": "launch",
 "mode": "exec",
 "trace": "verbose",
 "remotePath": "$workspaceRoot",
 "port": 2345,
 "host": "127.0.0.1",
 "program": "$workspaceRoot/build/bin/geth",
 "sources": "$workspaceRoot",
 "args": [

 ],
 "showLog": true
 ,

I am able to run the project inside the Visual Studio Code but all breakpoints are ignored.

Creating on: /Users/work/go/efsn/core/blockchain.go (/Users/work/go/efsn/core/blockchain.go) :256
Error on CreateBreakpoint: could not find /Users/work/go/efsn/core/blockchain.go:256

This is printout from my debug console:

Verbose logs are written to:
/var/folders/f0/8kqy01l55s3f5b642wc2w47w0000gp/T/vscode-go-debug.txt
10:18:57 AM, 11/14/2018
InitializeRequest
InitializeResponse
Using GOPATH: /Users/work/go
Current working directory: /Users/work/go/efsn/build/bin
Running: /Users/work/go/bin/dlv exec /Users/work/go/efsn/build/bin/geth --headless=true --listen=127.0.0.1:2345 --api-version=2 --log=true --
API server listening at: 127.0.0.1:2345
time="2018-11-14T10:18:57-05:00" level=info msg="launching process with args: [/Users/work/go/efsn/build/bin/geth]" layer=debugger
InitializeEvent
SetBreakPointsRequest
All cleared
Creating on: /Users/work/go/efsn/core/blockchain.go (/Users/work/go/efsn/core/blockchain.go) :256
Error on CreateBreakpoint: could not find /Users/work/go/efsn/core/blockchain.go:256
All set:[null]
SetBreakPointsResponse
ConfigurationDoneRequest
ContinueRequest
ContinueResponse
time="2018-11-14T10:18:58-05:00" level=debug msg=continuing layer=debugger
INFO [11-14|10:18:59.171] Maximum peer count ETH=25 LES=0 total=25
INFO [11-14|10:18:59.184] Starting peer-to-peer node instance=Geth/v1.8.16-unstable/darwin-amd64/go1.11.2

I have installed following packages needed by Rich Go extension:

go get -u github.com/derekparker/delve/cmd/dlv
go get -u -v github.com/nsf/gocode
go get -u -v github.com/rogpeppe/godef
go get -u -v github.com/golang/lint/golint
go get -u -v github.com/lukehoban/go-outline
go get -u -v sourcegraph.com/sqs/goreturns
go get -u -v golang.org/x/tools/cmd/gorename
go get -u -v github.com/tpng/gopkgs
go get -u -v github.com/newhook/go-symbols
go get -u -v golang.org/x/tools/cmd/guru

Any help would be greatly appreciated.
Thanks