From 3125ad371d2b635d04e6726d54d00f93702bc6c3 Mon Sep 17 00:00:00 2001
From: raskad <32105367+raskad@users.noreply.github.com>
Date: Sat, 18 Feb 2023 22:34:37 +0100
Subject: [PATCH] Fix string to number conversion for `infinity`

---
 boa_engine/src/string/mod.rs | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/boa_engine/src/string/mod.rs b/boa_engine/src/string/mod.rs
index e517d0fdd9b..1e365a5b99f 100644
--- a/boa_engine/src/string/mod.rs
+++ b/boa_engine/src/string/mod.rs
@@ -403,6 +403,10 @@ impl JsString {
             (Some(b'0'), Some(b'b' | b'B')) => Some(2),
             (Some(b'0'), Some(b'o' | b'O')) => Some(8),
             (Some(b'0'), Some(b'x' | b'X')) => Some(16),
+            // Make sure that no further variants of "infinity" are parsed.
+            (Some(b'i' | b'I'), _) => {
+                return f64::NAN;
+            }
             _ => None,
         };
 
@@ -430,11 +434,7 @@ impl JsString {
             return value;
         }
 
-        match string {
-            // Handle special cases so `fast_float` does not return infinity.
-            "inf" | "+inf" | "-inf" => f64::NAN,
-            string => fast_float::parse(string).unwrap_or(f64::NAN),
-        }
+        fast_float::parse(string).unwrap_or(f64::NAN)
     }
 
     /// Abstract operation `StringToBigInt ( str )`