From 7640b006350b0f7731e47100c8d5f8f9981c2ab3 Mon Sep 17 00:00:00 2001
From: Matt Brown <github@muglug.com>
Date: Mon, 9 Apr 2018 18:49:11 -0400
Subject: [PATCH] Only check functionlike arguments match if we know params

---
 .../Statements/Expression/Call/FunctionCallChecker.php       | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/Psalm/Checker/Statements/Expression/Call/FunctionCallChecker.php b/src/Psalm/Checker/Statements/Expression/Call/FunctionCallChecker.php
index e5f16a053..5b01916cd 100644
--- a/src/Psalm/Checker/Statements/Expression/Call/FunctionCallChecker.php
+++ b/src/Psalm/Checker/Statements/Expression/Call/FunctionCallChecker.php
@@ -270,11 +270,12 @@ class FunctionCallChecker extends \Psalm\Checker\Statements\Expression\CallCheck
             }
 
             // do this here to allow closure param checks
-            if (self::checkFunctionLikeArgumentsMatch(
+            if ($function_params !== null
+                && self::checkFunctionLikeArgumentsMatch(
                 $statements_checker,
                 $stmt->args,
                 $function_id,
-                $function_params ?: [],
+                $function_params,
                 $function_storage,
                 null,
                 $generic_params,