zig/test/incremental/remove_invalid_union_backing_enum

#target=x86_64-linux-selfhosted
#target=x86_64-windows-selfhosted
#target=x86_64-linux-cbe
#target=x86_64-windows-cbe
#target=wasm32-wasi-selfhosted
#update=initial version
#file=main.zig
const E = enum { a, b, c };
const U = union(E) {
    a: i32,
    b: f64,
    c: f64,
    d: f64,
};
pub fn main() void {
    const u: U = .{ .a = 123 };
    _ = u;
}
#expect_error=main.zig:6:5: error: no field named 'd' in enum 'main.E'
#expect_error=main.zig:1:11: note: enum declared here
#update=remove invalid backing enum
#file=main.zig
const U = union {
    a: i32,
    b: f64,
    c: f64,
    d: f64,
};
pub fn main() void {
    const u: U = .{ .a = 123 };
    _ = u;
}
#expect_stdout=""