[Lldb-commits] [lldb] [lldb-dap] Fix Completions Request crash (PR #176211)

[Ebuka Ezike via lldb-commits]

da-viper wrote:

I just noticed we do not produce the right completion. 

For example 
| Input | Current  | 
| ------------- | ------------- |
| mem | label: memory</br>text: memory | 

we end up with the full completion of `memmemory` when the user accepts the completion. 

```jsonc
(stdio) --> {"command":"completions","arguments": {"frameId":524288,"text":"mem","column":4,"line":1},"type":"request","seq":41}
(stdio) <-- {"body":{"targets":[{"label":"memory -- Commands for operating on memory in the current target process.","text":"memory"}]},"command":"completions","request_seq":41,"seq":59,"success":true,"type":"response"}
```
It existed before this PR. 
Tracking it here https://github.com/llvm/llvm-project/issues/176424

https://github.com/llvm/llvm-project/pull/176211