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

[Ebuka Ezike via lldb-commits]

================
@@ -273,6 +281,10 @@ def test_auto_completions(self):
             ],
         )
 
+        # TODO: Note we are not checking the result because the `expression --` command adds an extra character
----------------
da-viper wrote:

there is currently a bug in the `expression --` completion in the normal cli. 

```cpp
int main() { 
    int ƒake_f = 100;
    return 0; // breakpoint
}
```
stopping at the breakpoint type 
`expression -- f|` the cursor is after the f press tab. you will see it adds another `ƒ` character.  

you can also try it from the python script 
```py
(lldb) script
>>> matches = lldb.SBStringList()
>>> desc = lldb.SBStringList()
>>> inter = lldb.debugger.GetCommandInterpreter()
>>> line = "expression -- ƒ"
>>> cursor = len(line) + 1 # because ƒ is two bytes long
>>> inter.HandleCompletionWithDescriptions(line, cursor, 0, 10, matches, desc)
1
>>> for match in matches:
...     print(match)
... 
ƒake_f   # the common prefix
ƒƒake_f 
```

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