From 93d66117d0f7a19aa0153b3708f98eaeec51babe Mon Sep 17 00:00:00 2001
From: Brown <github@muglug.com>
Date: Sat, 19 Sep 2020 13:58:29 -0400
Subject: [PATCH] func_num_args is pure

fixes #4215
---
 src/Psalm/Internal/Codebase/Functions.php | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/Psalm/Internal/Codebase/Functions.php b/src/Psalm/Internal/Codebase/Functions.php
index 1755b4970..fdaf2767a 100644
--- a/src/Psalm/Internal/Codebase/Functions.php
+++ b/src/Psalm/Internal/Codebase/Functions.php
@@ -393,6 +393,10 @@ class Functions
             return true;
         }
 
+        if ($function_id === 'func_num_args' || $function_id === 'func_get_args') {
+            return true;
+        }
+
         if ($function_id === 'count' && isset($args[0]) && $type_provider) {
             $count_type = $type_provider->getType($args[0]->value);