Make array_map argument take into account unpack

Author: ryium

src/Reflection/ParametersAcceptorSelector.php

@@ -103,7 +103,20 @@ public static function selectFromArgs(
 				$parameters = $acceptor->getParameters();
 				$callbackParameters = [];
 				foreach ($arrayMapArgs as $arg) {
-					$callbackParameters[] = new DummyParameter('item', $scope->getIterableValueType($scope->getType($arg->value)), false, PassedByReference::createNo(), false, null);
+					$argType = $scope->getType($arg->value);
+					if ($arg->unpack) {
+						$constantArrays = $argType->getConstantArrays();
+						if (count($constantArrays) > 0) {
+							foreach ($constantArrays as $constantArray) {
+								$valueTypes = $constantArray->getValueTypes();
+								foreach ($valueTypes as $valueType) {
+									$callbackParameters[] = new DummyParameter('item', $scope->getIterableValueType($valueType), false, PassedByReference::createNo(), false, null);
+								}
+							}
+						}
+					} else {
+						$callbackParameters[] = new DummyParameter('item', $scope->getIterableValueType($argType), false, PassedByReference::createNo(), false, null);
+					}
 				}
 				$parameters[0] = new NativeParameterReflection(
 					$parameters[0]->getName(),

tests/PHPStan/Rules/Functions/CallToFunctionParametersRuleTest.php

@@ -1627,6 +1627,15 @@ public function testDiscussion10454(): void
 		]);
 	}
 
+	public function testBug10527(): void
+	{
+		if (PHP_VERSION_ID < 70400) {
+			$this->markTestSkipped('Test requires PHP 7.4');
+		}
+
+		$this->analyse([__DIR__ . '/data/bug-10527.php'], []);
+	}
+
 	public function testBug10626(): void
 	{
 		$this->analyse([__DIR__ . '/data/bug-10626.php'], [

tests/PHPStan/Rules/Functions/data/bug-10527.php

@@ -0,0 +1,14 @@
+<?php declare(strict_types=1);
+
+namespace Bug10527;
+
+class HelloWorld
+{
+	/**
+	 * @param array{0: list<string>, 1: list<string>} $tuple
+	 */
+	public function sayHello(array $tuple): void
+	{
+		array_map(fn (string $first, string $second) => $first . $second, ...$tuple);
+	}
+}