Add another regression test

Author: herndlm

tests/PHPStan/Rules/Functions/CallToFunctionParametersRuleTest.php

@@ -531,6 +531,11 @@ public function testBug3608(): void
 		$this->analyse([__DIR__ . '/data/bug-3608.php'], []);
 	}
 
+	public function testBug3631(): void
+	{
+		$this->analyse([__DIR__ . '/data/bug-3631.php'], []);
+	}
+
 	public function testBug3920(): void
 	{
 		$this->analyse([__DIR__ . '/data/bug-3920.php'], []);

tests/PHPStan/Rules/Functions/data/bug-3631.php

@@ -0,0 +1,27 @@
+<?php declare(strict_types = 1);
+
+namespace Bug3631;
+
+/**
+ * @return array<string>
+ */
+function someFunc(bool $flag): array
+{
+	$ids = [
+		['fa', 'foo', 'baz']
+	];
+
+	if ($flag) {
+		$ids[] = ['foo', 'bar', 'baz'];
+
+	}
+
+	if (count($ids) > 1) {
+		return array_intersect(...$ids);
+	}
+
+	return $ids[0];
+}
+
+var_dump(someFunc(true));
+var_dump(someFunc(false));