From a7dd34bfc57f4f84bb5290177f26e2d1f0bdc27e Mon Sep 17 00:00:00 2001
From: mlugg <mlugg@mlugg.co.uk>
Date: Wed, 16 Oct 2024 14:21:13 +0100
Subject: [PATCH] incremental: add new test case

This isn't exactly the case provided in #11290, but is a slightly
simpler case which I know would have triggered the same bug in the old
implementation of incremental compilation.

Resolves: #11290
---
 .../remove_invalid_union_backing_enum         | 30 +++++++++++++++++++
 1 file changed, 30 insertions(+)
 create mode 100644 test/incremental/remove_invalid_union_backing_enum

diff --git a/test/incremental/remove_invalid_union_backing_enum b/test/incremental/remove_invalid_union_backing_enum
new file mode 100644
index 0000000000..ded6304531
--- /dev/null
+++ b/test/incremental/remove_invalid_union_backing_enum
@@ -0,0 +1,30 @@
+#target=x86_64-linux-selfhosted
+#target=x86_64-linux-cbe
+#target=x86_64-windows-cbe
+#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=ignored
+#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=""