From 7d0b2b433fcd29f9311035eba2449d8b2f312d09 Mon Sep 17 00:00:00 2001
From: Hila Friedman <red.black.liquorice@gmail.com>
Date: Fri, 20 Sep 2024 10:02:23 +0300
Subject: [PATCH] Add compile error for bad types

---
 lib/std/math/gcd.zig | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/lib/std/math/gcd.zig b/lib/std/math/gcd.zig
index f35d81125f75..16ca7846f19a 100644
--- a/lib/std/math/gcd.zig
+++ b/lib/std/math/gcd.zig
@@ -9,7 +9,9 @@ pub fn gcd(a: anytype, b: anytype) @TypeOf(a, b) {
         comptime_int => std.math.IntFittingRange(@min(a, b), @max(a, b)),
         else => |T| T,
     };
-    comptime std.debug.assert(@typeInfo(N).Int.signedness == .unsigned);
+    if (@typeInfo(N) != .int or @typeInfo(N).int.signedness != .unsigned) {
+        @compileError("`a` and `b` must be usigned integers");
+    }
 
     // using an optimised form of Stein's algorithm:
     // https://en.wikipedia.org/wiki/Binary_GCD_algorithm