zig/test/incremental/remove_invalid_union_backing_enum

#exe {
-Mroot=main.zig
#}

#write 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;
}
#}
#update
#check errors {
main.zig:6:5: error: no field named 'd' in enum 'main.E'
main.zig:1:11: note: enum declared here
#}

#write main.zig {
const U = union {
    a: i32,
    b: f64,
    c: f64,
    d: f64,
};
pub fn main() void {
    const u: U = .{ .a = 123 };
    _ = u;
}
#}
#update {
remove invalid backing enum#}
#check stdout {
#}