From 490cafe2c5a62585fd80245a0f6fa5cff4f52dba Mon Sep 17 00:00:00 2001
From: LemonBoy <thatlemon@gmail.com>
Date: Sun, 25 Oct 2020 23:17:32 +0100
Subject: stage1: Error out when trying to execute `unreachable`

Closes #6802
---
 test/compile_errors.zig | 17 ++++++++++++++++-
 1 file changed, 16 insertions(+), 1 deletion(-)

(limited to 'test')

diff --git a/test/compile_errors.zig b/test/compile_errors.zig
index eb058bd0e7..47f3832526 100644
--- a/test/compile_errors.zig
+++ b/test/compile_errors.zig
@@ -2,6 +2,21 @@ const tests = @import("tests.zig");
 const std = @import("std");
 
 pub fn addCases(cases: *tests.CompileErrorContext) void {
+    cases.add("unreachable executed at comptime",
+        \\fn foo(comptime x: i32) i32 {
+        \\    comptime {
+        \\        if (x >= 0) return -x;
+        \\        unreachable;
+        \\    }
+        \\}
+        \\export fn entry() void {
+        \\    _ = foo(-42);
+        \\}
+    , &[_][]const u8{
+        "tmp.zig:4:9: error: reached unreachable code",
+        "tmp.zig:8:12: note: called from here",
+    });
+
     cases.add("indexing a undefined slice at comptime",
         \\comptime {
         \\    var slice: []u8 = undefined;
@@ -6208,7 +6223,7 @@ pub fn addCases(cases: *tests.CompileErrorContext) void {
         \\    if (!ok) unreachable;
         \\}
     , &[_][]const u8{
-        "tmp.zig:10:14: error: unable to evaluate constant expression",
+        "tmp.zig:10:14: error: reached unreachable code",
         "tmp.zig:6:20: note: referenced here",
     });
 
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