tuple created with wrong value

[marler8997]

Reproduce this issue with:

bug.zig:

const std = @import("std");

pub fn main() void {
    const val : u8 = blk: {
        if (false) break :blk 42;
        break :blk 93;
    };
    std.debug.warn("val is {}\n", .{val});
    const val2 = if (val == 42) @as(u8, 42) else @as(u8, 93);
    std.debug.warn("val2 = {}\n", .{val2});
    const tuple = .{if (val == 42) @as(u8, 42) else @as(u8, 93)};
    std.debug.warn("tuple[0] is {}\n", .{tuple[0]});
    // This assert fails!!!
    //std.debug.assert(val == tuple[0]);
}

$ zig run bug.zig 
val is 93
val2 is 93
tuple[0] is 42

This one boggles my mind. There are alot of places that can be changed that will make this error go away. I'm am perplexed by what combination of sorcery has caused this to happen and now I'm going to be very hesitant at how I use tuples (i.e. what I pass to print/format functions).

[rohlem]

Probably duplicate/related to #4491, #5230, #6444, #7097, although their names aren't the most descriptive.
To me it seems that branching expressions in tuples / anonymous-list-literals are generally broken/flaky in stage 1.

[marler8997]

yup looks like a duplicate of at least one of those :)