From d505ea6cafe8bf6549eb2c56396b0a94d8109859 Mon Sep 17 00:00:00 2001
From: Vexu <git@vexu.eu>
Date: Wed, 26 Feb 2020 01:03:58 +0200
Subject: fix `@tagName` on extern and non-exhaustive enums

---
 test/compile_errors.zig | 9 +++++++++
 1 file changed, 9 insertions(+)

(limited to 'test/compile_errors.zig')

diff --git a/test/compile_errors.zig b/test/compile_errors.zig
index 138f7a7633..0260160dca 100644
--- a/test/compile_errors.zig
+++ b/test/compile_errors.zig
@@ -3,6 +3,15 @@ const builtin = @import("builtin");
 const Target = @import("std").Target;
 
 pub fn addCases(cases: *tests.CompileErrorContext) void {
+    cases.addTest("@tagName on invalid value of non-exhaustive enum",
+        \\test "enum" {
+        \\    const E = enum(u8) {A, B, _};
+        \\    _ = @tagName(@intToEnum(E, 5));
+        \\}
+    , &[_][]const u8{
+        "tmp.zig:3:18: error: no tag by value 5",
+    });
+
     cases.addTest("@ptrToInt with pointer to zero-sized type",
         \\export fn entry() void {
         \\    var pointer: ?*u0 = null;
-- 
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