Function args show up twice in VS debugger's Locals view

[vvuk]

Any function args show up twice in the VS debugger's Locals view. Local variables show up only once.

[Mark-Simulacrum]

Could someone with access to Visual Studio and an MSVC environment take a look at this today?

[vvuk]

Sure! I'll take a look in the morning. Has something gone in that might have improved this?

[Mark-Simulacrum]

Not that I know of, but it never hurts to check. I wasn't actually quite aware I had strayed into November of 2016 already with issue triage, which is actually a good thing in some ways -- it means we've updated most of our ~2800 issues in the last 7 months.

[wesleywiser]

I just tested a basic scenario in both VS 2019 and Windbg. I was able to see function arguments in the Locals view correctly (each argument only showed once with the correct name, type and value).

Test code

fn add_two_numbers(x: usize, y: usize) -> usize {
  x + y
}

struct Options {
  add_numbers: bool,
  left: usize,
  right: usize,
}

fn do_it(options: Options) -> usize {
  if options.add_numbers {
    add_two_numbers(options.left, options.right)
  } else {
    options.left - options.right
  }
}

fn main() {
    let result = do_it(Options { add_numbers: true, left: 10, right: 3 });
    let result_2 = do_it(Options { add_numbers: false, left: 9, right: 5 });

    println!("result = {}, result_2 = {}", result, result_2);
}

Since this is working and this issue is rather old, I'm going to close.