From 7a340e8899126d83b5ccb36b0aac2d98dcdb328a Mon Sep 17 00:00:00 2001
From: Gordon Williams <gw@pur3.co.uk>
Date: Mon, 23 Sep 2024 10:58:27 +0100
Subject: [PATCH] Ensure x%Infinity===x (fix #2542)

---
 ChangeLog         | 1 +
 src/jswrap_math.c | 1 +
 2 files changed, 2 insertions(+)

diff --git a/ChangeLog b/ChangeLog
index 617b27e74..ffabdc2d7 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -18,6 +18,7 @@
             Ensure that 1%0.0===NaN (fix #2556)
             Ensure Number("1A")==NaN, previously we just parsed the digits we could (fix #2555)
             First argument of operators is now dereferenced before parsing second argument (fix #2547)
+            Ensure x%Infinity===x (fix #2542)
 
      2v24 : Bangle.js2: Add 'Bangle.touchRd()', 'Bangle.touchWr()'
             Bangle.js2: After Bangle.showTestScreen, put Bangle.js into a hard off state (not soft off)
diff --git a/src/jswrap_math.c b/src/jswrap_math.c
index 9185f8569..0a7d77792 100644
--- a/src/jswrap_math.c
+++ b/src/jswrap_math.c
@@ -267,6 +267,7 @@ double jswrap_math_mod(double x, double y) {
 
   if (!isfinite(x) || isnan(y) || y==0)
     return NAN;
+  if (y==INFINITY)  return x;
 
   if (0 > c) {
     x = -x;