[lldb] [windows] `operator bool() const` on struct not being resolved in breakpoint condition

[k4lizen]

Using lldb and clang on 01f0425 using windows.

#include <iostream>

struct Boolish {
    operator bool() const { return false; }
};
int main() {
    Boolish bol;
    if (!(bool)bol) {
        puts("operator resolved correctly!");
    }
    puts("break");
    puts("done");
    return 0;
}

Compiling with latest clang++ main.cpp -g3 -o main.exe.
Running ./main.exe gives the expected:

operator resolved correctly!
break
done

But trying the condition in lldb gives:

[snip]
(lldb) breakpoint set -f main.cpp -l 11 --condition "!(bool)bol"
(lldb) run
Process 5476 stopped
* thread #1, stop reason = breakpoint 1.1
    frame #0: 0x00007ff7e3e57186 main.exe`main at main.cpp:52
   49       if (!(bool)bol) {
   50           puts("operator resolved correctly!");
   51       }
-> 52       puts("break");
   53       puts("done");
   54       return 0;
   55   }
error: stopped due to an error evaluating condition of breakpoint 1.1: "!(bool)bol"
Couldn't parse conditional expression:
error: Couldn't look up symbols:
  bool Boolish::operator bool(void)
Hint: The expression tried to call a function that is not present in the target, perhaps because it was optimized out by the compiler.

(lldb)

If we remove the const, everything works as expected.

[llvmbot]

@llvm/issue-subscribers-lldb

Author: None (k4lizen)

Using lldb and clang on 01f0425 . Using windows (haven't tried it on linux but I'd assume it reproduces). ```cpp #include <iostream>

struct Boolish {
operator bool() const { return false; }
};
int main() {
Boolish bol;
if (!(bool)bol) {
puts("operator resolved correctly!");
}
puts("break");
puts("done");
return 0;
}

Compiling with latest `clang++ main.cpp -g3 -o main.exe`.
Running `./main.exe` gives the expected:

operator resolved correctly!
break
done

But trying the condition in lldb gives:

[snip]
(lldb) breakpoint set -f main.cpp -l 11 --condition "!(bool)bol"
(lldb) run
Process 5476 stopped

• thread #1, stop reason = breakpoint 1.1
  frame #0: 0x00007ff7e3e57186 main.exe`main at main.cpp:52
  49 if (!(bool)bol) {
  50 puts("operator resolved correctly!");
  51 }
  -> 52 puts("break");
  53 puts("done");
  54 return 0;
  55 }
  error: stopped due to an error evaluating condition of breakpoint 1.1: "!(bool)bol"
  Couldn't parse conditional expression:
  error: Couldn't look up symbols:
  bool Boolish::operator bool(void)
  Hint: The expression tried to call a function that is not present in the target, perhaps because it was optimized out by the compiler.

(lldb)

If we remove the `const`, everything works as expected.
</details>

[Michael137]

Doesn't repro on macOS for me. Perhaps a pdb plugin issue?

[k4lizen]

@Michael137 oh damn, yeah just tested it on linux and it doesn't reproduce, pdb-related issue would make sense