Fix

Author: ondrejmirtes

composer.json

@@ -7,7 +7,7 @@
 	],
 	"require": {
 		"php": "~7.1",
-		"phpstan/phpstan": "^0.12"
+		"phpstan/phpstan": "^0.12.26"
 	},
 	"conflict": {
 		"nette/application": "<2.3.0",

src/Rule/Nette/RethrowExceptionRule.php

@@ -66,6 +66,7 @@ public function processNode(Node $node, Scope $scope): array
 					count($catch->stmts) === 1
 					&& $catch->stmts[0] instanceof Node\Stmt\Throw_
 					&& $catch->stmts[0]->expr instanceof Variable
+					&& $catch->var !== null
 					&& is_string($catch->var->name)
 					&& is_string($catch->stmts[0]->expr->name)
 					&& $catch->var->name === $catch->stmts[0]->expr->name