Fix #1384 - evaluate array fetches even when we don’t know function

src/Psalm/Internal/Analyzer/Statements/Expression/CallAnalyzer.php

@@ -422,6 +422,7 @@ class CallAnalyzer
             || $arg->value instanceof PhpParser\Node\Expr\FuncCall
             || $arg->value instanceof PhpParser\Node\Expr\MethodCall
             || $arg->value instanceof PhpParser\Node\Expr\Assign
+            || $arg->value instanceof PhpParser\Node\Expr\ArrayDimFetch
         ) {
             if (ExpressionAnalyzer::analyze($statements_analyzer, $arg->value, $context) === false) {
                 return false;

tests/UnusedVariableTest.php

@@ -866,6 +866,17 @@ class UnusedVariableTest extends TestCase
                     };
                     foo($listener);',
             ],
+            'newVariableConstructor' => [
+                '<?php
+                    /**
+                     * @param class-string<ArrayObject> $type
+                     */
+                    function bar(string $type) : ArrayObject {
+                        $data = [["foo"], ["bar"]];
+
+                        return new $type($data[0]);
+                    }',
+            ],
         ];
     }