debug golang project, breakpoint is invalid

[Jerry-yz]

What version of Go, VS Code & VS Code Go extension are you using?

Version Information

• Run go version to get version of Go from the VS Code integrated terminal.
  • <go1.22>
• Run gopls -v version to get version of Gopls from the VS Code integrated terminal.
• Run code -v or code-insiders -v to get version of VS Code or VS Code Insiders.
  • <v1.91>
• Check your installed extensions to get the version of the VS Code Go extension
  • <v0.41.4>
• Run Ctrl+Shift+P (Cmd+Shift+P on Mac OS) > Go: Locate Configured Go Tools command.
  • <{
    "debug.allowBreakpointsEverywhere": true,
    "go.alternateTools": {}
    }>

Share the Go related settings you have added/edited

Run Preferences: Open Settings (JSON) command to open your settings.json file.
Share all the settings with the go. or ["go"] or gopls prefixes.

Describe the bug

A clear and concise description of what the bug.
A clear and concise description of what you expected to happen.

Steps to reproduce the behavior:

1. Go to '...'
2. Click on '....'
3. See error
   Steps to Reproduce:
   breakpoint main.go line fmt.Println(i), it invalid
   func main() {
   for i := 0; i < 10; i++ {
   fmt.Println(i)
   }
   }
   2.terminal immediate output

Screenshots or recordings

If applicable, add screenshots or recordings to help explain your problem.

[hyangah]

@Jerry-yz thanks for reaching out. I cannot reproduce it myself.

Can you capture the log and share it with us? Here is the instruction:
https://github.com/golang/vscode-go/wiki/debugging#collect-logs

And, please let us know how exactly you launched the debug session - pressing F5? or clicking "Run and Debug" button in the debug view, or having launch.json?

[Jerry-yz]

> @Jerry-yz thanks for reaching out. I cannot reproduce it myself.

Can you capture the log and share it with us? Here is the instruction: https://github.com/golang/vscode-go/wiki/debugging#collect-logs

And, please let us know how exactly you launched the debug session - pressing F5? or clicking "Run and Debug" button in the debug view, or having launch.json?

this is my launch.json:
{ // 使用 IntelliSense 了解相关属性。 // 悬停以查看现有属性的描述。 // 欲了解更多信息，请访问: https://go.microsoft.com/fwlink/?linkid=830387 "version": "0.2.0", "configurations": [ { "name": "Launch Package", "type": "go", "request": "launch", "mode": "auto", "program": "${fileDirname}" }, ] }
and terminal is output:
Starting: /home/yz/work/go/bin/dlv dap --listen=127.0.0.1:60749 --log-dest=3 from /home/yz/learn/test
DAP server listening at: 127.0.0.1:60749
Type 'dlv help' for list of commands.
3
Process 1632 has exited with status 0
Detaching
dlv dap (1456) exited with code: 0

[Jerry-yz]

i edit launch.json:
{
"name": "Launch Package",
"type": "go",
"request": "launch",
"mode": "auto",
"program": "${fileDirname}",
"logOutput": "dap",
"showLog": true,
"stopOnEntry": true
}
then, terminal log:
2024-07-11T21:52:55+08:00 debug layer=dap [-> to client]{"seq":0,"type":"event","event":"initialized"}
2024-07-11T21:52:55+08:00 debug layer=dap [-> to client]{"seq":0,"type":"response","request_seq":2,"success":true,"command":"launch"}
2024-07-11T21:52:56+08:00 debug layer=dap [<- from client]{"seq":3,"type":"request","command":"setBreakpoints","arguments":{"source":{"name":"main.go","path":"/home/yz/learn/test/mysql/main.go"},"breakpoints":[{"line":14}],"lines":[14]}}
2024-07-11T21:52:56+08:00 debug layer=dap [-> to client]{"seq":0,"type":"response","request_seq":3,"success":true,"command":"setBreakpoints","body":{"breakpoints":[{"verified":false,"message":"could not find file /home/yz/learn/test/mysql/main.go"}]}}
2024-07-11T21:52:56+08:00 debug layer=dap [<- from client]{"seq":4,"type":"request","command":"setBreakpoints","arguments":{"source":{"name":"main.go","path":"/home/yz/learn/test/main.go"},"breakpoints":[{"line":25}],"lines":[25]}}
2024-07-11T21:52:56+08:00 debug layer=dap [-> to client]{"seq":0,"type":"response","request_seq":4,"success":true,"command":"setBreakpoints","body":{"breakpoints":[{"verified":false,"message":"could not find statement at /home/yz/learn/test/main.go:25, please use a line with a statement"}]}}
2024-07-11T21:52:56+08:00 debug layer=dap [<- from client]{"seq":5,"type":"request","command":"setFunctionBreakpoints","arguments":{"breakpoints":[]}}
2024-07-11T21:52:56+08:00 debug layer=dap [-> to client]{"seq":0,"type":"response","request_seq":5,"success":true,"command":"setFunctionBreakpoints","body":{"breakpoints":[]}}
2024-07-11T21:52:56+08:00 debug layer=dap [<- from client]{"seq":6,"type":"request","command":"setInstructionBreakpoints","arguments":{"breakpoints":[]}}
2024-07-11T21:52:56+08:00 debug layer=dap [-> to client]{"seq":0,"type":"response","request_seq":6,"success":true,"command":"setInstructionBreakpoints","body":{"breakpoints":[]}}

[hyangah]

Thanks. It's a bit confusing that there are two different breakpoints involving main.go and neither worked.

Let's try what path the binary is built with.

1. Since you already have "stopOnEntry": true, the debugging should stop at the beginning, right?
2. When the debugging stops, open "DEBUG CONSOLE", enter "dlv sources main.go"
   

What source code path does it show?

[Jerry-yz]

Thanks. It's a bit confusing that there are two different breakpoints involving main.go and neither worked.

Let's try what path the binary is built with.

1. Since you already have "stopOnEntry": true, the debugging should stop at the beginning, right?
2. When the debugging stops, open "DEBUG CONSOLE", enter "dlv sources main.go"
   

What source code path does it show?

the log output source code path
/home/yz/learn/test/mysql/main.go

[hyangah]

That is strange. Then, if line 14 is indeed fmt.Println(i), that should work.

2024-07-11T21:52:55+08:00 debug layer=dap [-> to client]{"seq":0,"type":"event","event":"initialized"}
2024-07-11T21:52:55+08:00 debug layer=dap [-> to client]{"seq":0,"type":"response","request_seq":2,"success":true,"command":"launch"}
2024-07-11T21:52:56+08:00 debug layer=dap [<- from client]{"seq":3,"type":"request","command":"setBreakpoints","arguments":{"source":{"name":"main.go","path":"/home/yz/learn/test/mysql/main.go"},"breakpoints":[{"line":14}],"lines":[14]}}
2024-07-11T21:52:56+08:00 debug layer=dap [-> to client]{"seq":0,"type":"response","request_seq":3,"success":true,"command":"setBreakpoints","body":{"breakpoints":[{"verified":false,"message":"could not find file /home/yz/learn/test/mysql/main.go"}]}}

The launch request arguments and the following build messages were redacted, so I don't know exactly how you built the binary. Do you use any non-default build flags added in the launch arg or environment variables? (go env)

I am running out of ideas and cannot reproduce.

Can you try if dlv command line tool works?

$ cd /home/yz/learn/test/mysql
$ dlv debug
Type 'help' for list of commands.
(dlv) b /home/yz/learn/test/mysql/main.go:14
Breakpoint 1 set at 0x10ae6ca for main.main() ./main.go:14
(dlv) c
> [Breakpoint 1] main.main() ./main.go:14 (hits goroutine(1):1 total:1) (PC: 0x10ae6ca)
     9: )
    10:
    11: // main
    12: func main() {
    13:         for i := 0; i < 10; i++ {
=>  14:                 fmt.Println(i)
    15:         }
    16: }

Does it work for you?

[Jerry-yz]

That is strange. Then, if line 14 is indeed fmt.Println(i), that should work.

2024-07-11T21:52:55+08:00 debug layer=dap [-> to client]{"seq":0,"type":"event","event":"initialized"}
2024-07-11T21:52:55+08:00 debug layer=dap [-> to client]{"seq":0,"type":"response","request_seq":2,"success":true,"command":"launch"}
2024-07-11T21:52:56+08:00 debug layer=dap [<- from client]{"seq":3,"type":"request","command":"setBreakpoints","arguments":{"source":{"name":"main.go","path":"/home/yz/learn/test/mysql/main.go"},"breakpoints":[{"line":14}],"lines":[14]}}
2024-07-11T21:52:56+08:00 debug layer=dap [-> to client]{"seq":0,"type":"response","request_seq":3,"success":true,"command":"setBreakpoints","body":{"breakpoints":[{"verified":false,"message":"could not find file /home/yz/learn/test/mysql/main.go"}]}}

The launch request arguments and the following build messages were redacted, so I don't know exactly how you built the binary. Do you use any non-default build flags added in the launch arg or environment variables? (go env)

I am running out of ideas and cannot reproduce.

Can you try if dlv command line tool works?

$ cd /home/yz/learn/test/mysql
$ dlv debug
Type 'help' for list of commands.
(dlv) b /home/yz/learn/test/mysql/main.go:14
Breakpoint 1 set at 0x10ae6ca for main.main() ./main.go:14
(dlv) c
> [Breakpoint 1] main.main() ./main.go:14 (hits goroutine(1):1 total:1) (PC: 0x10ae6ca)
     9: )
    10:
    11: // main
    12: func main() {
    13:         for i := 0; i < 10; i++ {
=>  14:                 fmt.Println(i)
    15:         }
    16: }

Does it work for you?

it not workl:
dlv debug
Type 'help' for list of commands.
(dlv) b /home/yz/learn/test/mysql/main.go:14
Command failed: could not find statement at /home/yz/learn/test/mysql/main.go:14, please use a line with a statement
(dlv)