@bitCast() and meta.Vector components don't work together as expected

[Opioid]

Consider the following program:

const std = @import("std");
pub const Vec4f = std.meta.Vector(4, f32);

pub fn garbage(a: Vec4f) void {
    const b = Vec4f{
        @bitCast(f32, @bitCast(i32, a[0])),
        @bitCast(f32, @bitCast(i32, a[1])),
        @bitCast(f32, @bitCast(i32, a[2])),
        @bitCast(f32, @bitCast(i32, a[3])),
    };

    std.debug.print("{} {}\n", .{ a, b });
}

pub fn noGarbage(a: Vec4f) void {
    const b0 = @bitCast(f32, @bitCast(i32, a[0]));
    const b1 = @bitCast(f32, @bitCast(i32, a[1]));
    const b2 = @bitCast(f32, @bitCast(i32, a[2]));
    const b3 = @bitCast(f32, @bitCast(i32, a[3]));

    const b = Vec4f{ b0, b1, b2, b3 };

    std.debug.print("{} {}\n", .{ a, b });
}

pub fn main() void {
    const p = Vec4f{ 100.0, 100.0, 100.0, 100.0 };

    garbage(p);
    noGarbage(p);
}

The b vector does not print as expected when calling garbage(), it works as expected with noGarbage(). Example output:

{ 1.0e+02, 1.0e+02, 1.0e+02, 1.0e+02 } { 1.0e+02, 4.59121428e-41, 3.24416114e-03, 2.03188277e-43 }
{ 1.0e+02, 1.0e+02, 1.0e+02, 1.0e+02 } { 1.0e+02, 1.0e+02, 1.0e+02, 1.0e+02 }