From 843467bb8f76b5fbb1546f7f0216422031ab9860 Mon Sep 17 00:00:00 2001
From: Jeroen van Rijn <Kelimion@users.noreply.github.com>
Date: Sat, 5 Apr 2025 14:47:30 +0200
Subject: Fix #5004

Fixes constant NaN to constant NaN comparisons.
---
 src/exact_value.cpp | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'src/exact_value.cpp')

diff --git a/src/exact_value.cpp b/src/exact_value.cpp
index ceaed84c1..f4439688c 100644
--- a/src/exact_value.cpp
+++ b/src/exact_value.cpp
@@ -954,6 +954,10 @@ gb_internal bool compare_exact_values(TokenKind op, ExactValue x, ExactValue y)
 	case ExactValue_Float: {
 		f64 a = x.value_float;
 		f64 b = y.value_float;
+		if (isnan(a) || isnan(b)) {
+			return false; // Fixes #5004
+		}
+
 		switch (op) {
 		case Token_CmpEq: return cmp_f64(a, b) == 0;
 		case Token_NotEq: return cmp_f64(a, b) != 0;
-- 
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