diff --git a/bin/generate-function-metadata.php b/bin/generate-function-metadata.php
index 1de02f286e..a7e4ebd35a 100755
--- a/bin/generate-function-metadata.php
+++ b/bin/generate-function-metadata.php
@@ -4,6 +4,7 @@
 use PhpParser\Node;
 use PhpParser\NodeTraverser;
 use PhpParser\NodeVisitor\NameResolver;
+use PhpParser\NodeVisitor\NodeConnectingVisitor;
 use PhpParser\ParserFactory;
 
 (function () {
@@ -18,17 +19,34 @@
 		/** @var string[] */
 		public $functions = [];
 
+		/** @var string[] */
+		public $methods = [];
+
 		public function enterNode(Node $node)
 		{
-			if (!$node instanceof Node\Stmt\Function_) {
-				return;
+			if ($node instanceof Node\Stmt\Function_) {
+				foreach ($node->attrGroups as $attrGroup) {
+					foreach ($attrGroup->attrs as $attr) {
+						if ($attr->name->toString() === \JetBrains\PhpStorm\Pure::class) {
+							$this->functions[] = $node->namespacedName->toLowerString();
+							break;
+						}
+					}
+				}
 			}
 
-			foreach ($node->attrGroups as $attrGroup) {
-				foreach ($attrGroup->attrs as $attr) {
-					if ($attr->name->toString() === \JetBrains\PhpStorm\Pure::class) {
-						$this->functions[] = $node->namespacedName->toLowerString();
-						break;
+			if ($node instanceof Node\Stmt\ClassMethod) {
+				$class = $node->getAttribute('parent');
+				if (!$class instanceof Node\Stmt\ClassLike) {
+					throw new \PHPStan\ShouldNotHappenException($node->name->toString());
+				}
+				$className = $class->namespacedName->toString();
+				foreach ($node->attrGroups as $attrGroup) {
+					foreach ($attrGroup->attrs as $attr) {
+						if ($attr->name->toString() === \JetBrains\PhpStorm\Pure::class) {
+							$this->methods[] = sprintf('%s::%s', $className, $node->name->toString());
+							break;
+						}
 					}
 				}
 			}
@@ -41,6 +59,7 @@ public function enterNode(Node $node)
 		$path = $stubFile->getPathname();
 		$traverser = new NodeTraverser();
 		$traverser->addVisitor(new NameResolver());
+		$traverser->addVisitor(new NodeConnectingVisitor());
 		$traverser->addVisitor($visitor);
 
 		$traverser->traverse(
@@ -58,6 +77,15 @@ public function enterNode(Node $node)
 		$metadata[$functionName] = ['hasSideEffects' => false];
 	}
 
+	foreach ($visitor->methods as $methodName) {
+		if (array_key_exists($methodName, $metadata)) {
+			if ($metadata[$methodName]['hasSideEffects']) {
+				throw new \PHPStan\ShouldNotHappenException($methodName);
+			}
+		}
+		$metadata[$methodName] = ['hasSideEffects' => false];
+	}
+
 	ksort($metadata);
 
 	$template = <<<'php'
diff --git a/resources/functionMetadata.php b/resources/functionMetadata.php
index af134c51a3..de5e26f36b 100644
--- a/resources/functionMetadata.php
+++ b/resources/functionMetadata.php
@@ -1,6 +1,30 @@
 <?php declare(strict_types = 1);
 
 return [
+	'Cassandra\\Exception\\AlreadyExistsException::__construct' => ['hasSideEffects' => false],
+	'Cassandra\\Exception\\AuthenticationException::__construct' => ['hasSideEffects' => false],
+	'Cassandra\\Exception\\ConfigurationException::__construct' => ['hasSideEffects' => false],
+	'Cassandra\\Exception\\DivideByZeroException::__construct' => ['hasSideEffects' => false],
+	'Cassandra\\Exception\\DomainException::__construct' => ['hasSideEffects' => false],
+	'Cassandra\\Exception\\ExecutionException::__construct' => ['hasSideEffects' => false],
+	'Cassandra\\Exception\\InvalidArgumentException::__construct' => ['hasSideEffects' => false],
+	'Cassandra\\Exception\\InvalidQueryException::__construct' => ['hasSideEffects' => false],
+	'Cassandra\\Exception\\InvalidSyntaxException::__construct' => ['hasSideEffects' => false],
+	'Cassandra\\Exception\\IsBootstrappingException::__construct' => ['hasSideEffects' => false],
+	'Cassandra\\Exception\\LogicException::__construct' => ['hasSideEffects' => false],
+	'Cassandra\\Exception\\OverloadedException::__construct' => ['hasSideEffects' => false],
+	'Cassandra\\Exception\\ProtocolException::__construct' => ['hasSideEffects' => false],
+	'Cassandra\\Exception\\RangeException::__construct' => ['hasSideEffects' => false],
+	'Cassandra\\Exception\\ReadTimeoutException::__construct' => ['hasSideEffects' => false],
+	'Cassandra\\Exception\\RuntimeException::__construct' => ['hasSideEffects' => false],
+	'Cassandra\\Exception\\ServerException::__construct' => ['hasSideEffects' => false],
+	'Cassandra\\Exception\\TimeoutException::__construct' => ['hasSideEffects' => false],
+	'Cassandra\\Exception\\TruncateException::__construct' => ['hasSideEffects' => false],
+	'Cassandra\\Exception\\UnauthorizedException::__construct' => ['hasSideEffects' => false],
+	'Cassandra\\Exception\\UnavailableException::__construct' => ['hasSideEffects' => false],
+	'Cassandra\\Exception\\UnpreparedException::__construct' => ['hasSideEffects' => false],
+	'Cassandra\\Exception\\ValidationException::__construct' => ['hasSideEffects' => false],
+	'Cassandra\\Exception\\WriteTimeoutException::__construct' => ['hasSideEffects' => false],
 	'DateTime::add' => ['hasSideEffects' => true],
 	'DateTime::createFromFormat' => ['hasSideEffects' => false],
 	'DateTime::createFromImmutable' => ['hasSideEffects' => false],
@@ -33,6 +57,18 @@
 	'DateTimeImmutable::setTimestamp' => ['hasSideEffects' => false],
 	'DateTimeImmutable::setTimezone' => ['hasSideEffects' => false],
 	'DateTimeImmutable::sub' => ['hasSideEffects' => false],
+	'ErrorException::__construct' => ['hasSideEffects' => false],
+	'Exception::__construct' => ['hasSideEffects' => false],
+	'Exception::getCode' => ['hasSideEffects' => false],
+	'Exception::getFile' => ['hasSideEffects' => false],
+	'Exception::getLine' => ['hasSideEffects' => false],
+	'Exception::getMessage' => ['hasSideEffects' => false],
+	'Exception::getPrevious' => ['hasSideEffects' => false],
+	'Exception::getTrace' => ['hasSideEffects' => false],
+	'Exception::getTraceAsString' => ['hasSideEffects' => false],
+	'MemcachedException::__construct' => ['hasSideEffects' => false],
+	'SQLiteException::__construct' => ['hasSideEffects' => false],
+	'SoapFault::__construct' => ['hasSideEffects' => false],
 	'_' => ['hasSideEffects' => false],
 	'abs' => ['hasSideEffects' => false],
 	'acos' => ['hasSideEffects' => false],
diff --git a/tests/PHPStan/Rules/Methods/CallToMethodStamentWithoutSideEffectsRuleTest.php b/tests/PHPStan/Rules/Methods/CallToMethodStamentWithoutSideEffectsRuleTest.php
index 2796cc5a77..d368906420 100644
--- a/tests/PHPStan/Rules/Methods/CallToMethodStamentWithoutSideEffectsRuleTest.php
+++ b/tests/PHPStan/Rules/Methods/CallToMethodStamentWithoutSideEffectsRuleTest.php
@@ -28,6 +28,10 @@ public function testRule(): void
 				'Call to static method DateTimeImmutable::createFromFormat() on a separate line has no effect.',
 				16,
 			],
+			[
+				'Call to method Exception::getCode() on a separate line has no effect.',
+				21,
+			],
 		]);
 	}
 
diff --git a/tests/PHPStan/Rules/Methods/data/method-call-statement-no-side-effects.php b/tests/PHPStan/Rules/Methods/data/method-call-statement-no-side-effects.php
index b677e7c4bf..84b50bac5c 100644
--- a/tests/PHPStan/Rules/Methods/data/method-call-statement-no-side-effects.php
+++ b/tests/PHPStan/Rules/Methods/data/method-call-statement-no-side-effects.php
@@ -16,4 +16,9 @@ public function doBar(\DateTimeImmutable $dti)
 		$dti->createFromFormat('Y-m-d', '2019-07-24');
 	}
 
+	public function doBaz(\Exception $e)
+	{
+		$e->getCode();
+	}
+
 }