miscompilation conditional in fmt arg

[markfirmware]

pub fn main() void {
    show(T{});
}

const T = struct {
    b: bool = false,
};

fn show(t: T) void {
    @import("std").debug.warn("{}\n", .{if (t.b) @as(u32, 1) else 0});
}

This should print 0 but instead prints 1.

Related #3882

[lordnoriyuki]

Even simpler example:

var f = false;
std.log.info("{} {s}", .{ f, if (f) "TRUE " else "FALSE" });

Prints "false TRUE" when it should print "false FALSE"