Else capture allowed for boolean condition and it forces true branch

[leecannon]

Zig Version

0.10.0-dev.2860+c9006d947

Steps to Reproduce

const std = @import("std");

pub fn main() void {
    var the_answer: usize = 42;

    if (the_answer == 0) {
        std.debug.print("first: it's zero\n", .{});
    } else |n| { // with capture, it is broken
        std.debug.print("first: {}\n", .{n});
    }

    if (the_answer == 0) {
        std.debug.print("second: it's zero\n", .{});
    } else { // without capture, it is fine
        std.debug.print("second: {}\n", .{the_answer});
    }
}

Expected Behavior

first: 42
second: 42

Actual Behavior

first: it's zero
second: 42

It does not make sense for an if on a boolean expression to allow a capture on the else.

And even worse than that it causes the true branch to be executed even if the expression is false 😰

[Vexu]

Fixed by 58caed1