The Print is broken when I use a single line If statement

[haz00]

Zig Version

0.10.0-dev.3559+d2342370f

Steps to Reproduce

This is broken, prints: ...

const std = @import("std");

pub fn main() !void {
    const arr = [_]u8{0} ** 3;

    for (arr) |_, idx| {
        std.debug.print("{s}", .{ if (idx % 2 == 0) "." else "-"});
    }
}

Expected Behavior

The valid result must be .-.

This is valid code:

const std = @import("std");

pub fn main() !void {
    const arr = [_]u8{0} ** 3;

    for (arr) |_, idx| {
        var str = if (idx % 2 == 0) "." else "-";
        std.debug.print("{s}", .{ str });
    }
}

Actual Behavior

No errors, just incorrect result from If expression.

[tauoverpi]

duplicate of #5230, note that this works with -fno-stage1