Fixed a crashing issue when a different version of a class from the a…

…utoloaded one is analyzed

composer.json

@@ -35,6 +35,6 @@
 		"psr-4": {"PHPStan\\": "src/"}
 	},
 	"autoload-dev": {
-		"classmap": ["tests/"]
+		"classmap": ["tests/PHPStan", "tests/TestCase.php"]
 	}
 }

phpstan.neon

@@ -1,6 +1,7 @@
 parameters:
 	excludes_analyse:
 		- %rootDir%/tests/*/data/*
+		- %rootDir%/tests/notAutoloaded/*
 	ignoreErrors:
 		- '#PHPUnit_Framework_MockObject_MockObject::method\(\)#'
 services:

src/Reflection/ClassReflection.php

@@ -93,6 +93,10 @@ public function getMethod(string $methodName): MethodReflection
 			}
 		}
 
+		if (!isset($this->methods[$methodName])) {
+			throw new \PHPStan\Reflection\MissingMethodFromReflectionException($this->getName(), $methodName);
+		}
+
 		return $this->methods[$methodName];
 	}
 
@@ -112,6 +116,10 @@ public function getProperty(string $propertyName, Scope $scope = null): Property
 			}
 		}
 
+		if (!isset($this->properties[$propertyName])) {
+			throw new \PHPStan\Reflection\MissingPropertyFromReflectionException($this->getName(), $propertyName);
+		}
+
 		return $this->properties[$propertyName];
 	}
 

src/Reflection/MissingMethodFromReflectionException.php

@@ -0,0 +1,19 @@
+<?php declare(strict_types = 1);
+
+namespace PHPStan\Reflection;
+
+class MissingMethodFromReflectionException extends \PHPStan\AnalysedCodeException
+{
+
+	public function __construct(string $className, string $methodName)
+	{
+		parent::__construct(
+			sprintf(
+				'Method %s() was not found in reflection of class %s - probably the wrong version of class is autoloaded.',
+				$methodName,
+				$className
+			)
+		);
+	}
+
+}

src/Reflection/MissingPropertyFromReflectionException.php

@@ -0,0 +1,19 @@
+<?php declare(strict_types = 1);
+
+namespace PHPStan\Reflection;
+
+class MissingPropertyFromReflectionException extends \PHPStan\AnalysedCodeException
+{
+
+	public function __construct(string $className, string $propertyName)
+	{
+		parent::__construct(
+			sprintf(
+				'Property $%s was not found in reflection of class %s - probably the wrong version of class is autoloaded.',
+				$propertyName,
+				$className
+			)
+		);
+	}
+
+}

tests/PHPStan/Analyser/AnalyserIntegrationTest.php

@@ -17,4 +17,16 @@ public function testUndefinedVariableFromAssignErrorHasLine()
 		$this->assertSame(3, $error->getLine());
 	}
 
+	public function testMissingPropertyAndMethod()
+	{
+		$file = __DIR__ . '/../../notAutoloaded/Foo.php';
+		$analyser = $this->getContainer()->getByType(Analyser::class);
+		$errors = $analyser->analyse([$file]);
+		$this->assertCount(1, $errors);
+		$error = $errors[0];
+		$this->assertSame('Property $fooProperty was not found in reflection of class PHPStan\Tests\Foo - probably the wrong version of class is autoloaded.', $error->getMessage());
+		$this->assertSame($file, $error->getFile());
+		$this->assertNull($error->getLine());
+	}
+
 }

tests/PHPStan/Analyser/data/Foo.php

@@ -0,0 +1,8 @@
+<?php declare(strict_types = 1);
+
+namespace PHPStan\Tests;
+
+class Foo
+{
+
+}

tests/notAutoloaded/Foo.php

@@ -0,0 +1,18 @@
+<?php declare(strict_types = 1);
+
+namespace PHPStan\Tests;
+
+class Foo
+{
+
+	/** @var string */
+	private $fooProperty;
+
+	public function doFoo(): string
+	{
+		$this->fooProperty = 'test';
+
+		return $this->fooProperty;
+	}
+
+}