Error return trace incorrect when the function returning the error is called multiple times

[quid256]

Zig Version

0.14.0-dev.1820+ea527f7a8

Steps to Reproduce and Observed Behavior

$ touch main.zig

Then edit main.zig to contain

pub fn check_number(num: u8) !void {
    switch (num) {
        0 => return error.IsZero,
        10 => return error.IsTen,
        else => {},
    }
}

pub fn main() !void {
    const num1 = check_number(0);
    _ = num1 catch {} // discard error.IsZero

    const num2 = check_number(10);
    try num2;
}

Then

$ zig run main.zig
error: IsTen
.../main.zig:3:14: 0x10381e4 in check_number (main)
        0 => return error.IsZero,
             ^
.../main.zig:4:15: 0x10381f7 in check_number (main)
        10 => return error.IsTen,
              ^
.../main.zig:14:5: 0x10382d0 in main (main)
    try num2;
    ^

Expected Behavior

The first entry in the error return trace should have pointed me to test.zig:4:15, the line that generated the error that was returned from main. Instead, it pointed to test.zig:3:15, even though that error was generated by the first call to check_number and discarded.

(Sorry if I'm missing something obvious here -- I'm new to Zig)

[nemoos0]

Apparently enclosing the failing function in a block solves the issue, I have no idea why this works.

pub fn check_number(num: u8) !void {
    switch (num) {
        0 => return error.IsZero,
        10 => return error.IsTen,
        else => {},
    }
}

pub fn main() !void {
    {
        const num1 = check_number(0);
        _ = num1 catch {}; // discard error.IsZero
    }

    const num2 = check_number(10);
    try num2;
}

Shoutout to castholm for pointing this out in the discord server https://discord.com/channels/605571803288698900/1325785607469010975