Sema: validate `@intToEnum` int operand type

1 files changed, 22 insertions, 0 deletions

diff --git a/test/cases/compile_errors/duplicate_error_in_switch.zig b/test/cases/compile_errors/duplicate_error_in_switch.zig
new file mode 100644
index 0000000000..6e9b1e9099
--- /dev/null
+++ b/test/cases/compile_errors/duplicate_error_in_switch.zig
@@ -0,0 +1,22 @@
+export fn entry() void {
+    foo(452) catch |err| switch (err) {
+        error.Foo => {},
+        error.Bar => {},
+        error.Foo => {},
+        else => {},
+    };
+}
+fn foo(x: i32) !void {
+    switch (x) {
+        0 ... 10 => return error.Foo,
+        11 ... 20 => return error.Bar,
+        else => {},
+    }
+}
+
+// error
+// backend=llvm
+// target=native
+//
+// :5:9: error: duplicate switch value
+// :3:9: note: other value here