symfony
diff --git a/‎src/Symfony/Component/DependencyInjection/Compiler/ResolveBindingsPass.php
Copy file name to clipboardExpand all lines: src/Symfony/Component/DependencyInjection/Compiler/ResolveBindingsPass.php
+15-3Lines changed: 15 additions & 3 deletions b/‎src/Symfony/Component/DependencyInjection/Compiler/ResolveBindingsPass.php
Copy file name to clipboardExpand all lines: src/Symfony/Component/DependencyInjection/Compiler/ResolveBindingsPass.php
+15-3Lines changed: 15 additions & 3 deletions
diff --git a/‎src/Symfony/Component/DependencyInjection/Tests/Compiler/ResolveBindingsPassTest.php
Copy file name to clipboardExpand all lines: src/Symfony/Component/DependencyInjection/Tests/Compiler/ResolveBindingsPassTest.php
+16Lines changed: 16 additions & 0 deletions b/‎src/Symfony/Component/DependencyInjection/Tests/Compiler/ResolveBindingsPassTest.php
Copy file name to clipboardExpand all lines: src/Symfony/Component/DependencyInjection/Tests/Compiler/ResolveBindingsPassTest.php
+16Lines changed: 16 additions & 0 deletions
@@ -112,6 +112,8 @@ protected function processValue($value, $isRoot = false)
             return parent::processValue($value, $isRoot);
         }
 
+        $bindingNames = [];
+
         foreach ($bindings as $key => $binding) {
             list($bindingValue, $bindingId, $used, $bindingType, $file) = $binding->getValues();
             if ($used) {
@@ -121,7 +123,11 @@ protected function processValue($value, $isRoot = false)
                 $this->unusedBindings[$bindingId] = [$key, $this->currentId, $bindingType, $file];
             }
 
-            if (preg_match('/^(?:(?:array|bool|float|int|string) )?\$/', $key)) {
+            if (preg_match('/^(?:(?:array|bool|float|int|string|([^ $]++)) )\$/', $key, $m)) {
+                $bindingNames[substr($key, \strlen($m[0]))] = $binding;
+            }
+
+            if (!isset($m[1])) {
                 continue;
             }
 
@@ -182,11 +188,17 @@ protected function processValue($value, $isRoot = false)
                     continue;
                 }
 
-                if (!$typeHint || '\\' !== $typeHint[0] || !isset($bindings[$typeHint = substr($typeHint, 1)])) {
+                if ($typeHint && '\\' === $typeHint[0] && isset($bindings[$typeHint = substr($typeHint, 1)])) {
+                    $arguments[$key] = $this->getBindingValue($bindings[$typeHint]);
+
                     continue;
                 }
 
-                $arguments[$key] = $this->getBindingValue($bindings[$typeHint]);
+                if (isset($bindingNames[$parameter->name])) {
+                    $bindingKey = array_search($binding, $bindings, true);
+                    $argumentType = substr($bindingKey, 0, strpos($bindingKey, ' '));
+                    $this->errorMessages[] = sprintf('Did you forget to add the type "%s" to argument "$%s" of method "%s::%s()"?', $argumentType, $parameter->name, $reflectionMethod->class, $reflectionMethod->name);
+                }
             }
 
             if ($arguments !== $call[1]) {
 
@@ -18,6 +18,7 @@
 use Symfony\Component\DependencyInjection\Compiler\ResolveBindingsPass;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 use Symfony\Component\DependencyInjection\Definition;
+use Symfony\Component\DependencyInjection\Exception\InvalidArgumentException;
 use Symfony\Component\DependencyInjection\Reference;
 use Symfony\Component\DependencyInjection\Tests\Fixtures\CaseSensitiveClass;
 use Symfony\Component\DependencyInjection\Tests\Fixtures\NamedArgumentsDummy;
@@ -157,4 +158,19 @@ public function testSyntheticServiceWithBind()
 
         $this->assertSame([1 => 'bar'], $container->getDefinition(NamedArgumentsDummy::class)->getArguments());
     }
+
+    public function testEmptyBindingTypehint()
+    {
+        $this->expectException(InvalidArgumentException::class);
+        $this->expectExceptionMessage('Did you forget to add the type "string" to argument "$apiKey" of method "Symfony\Component\DependencyInjection\Tests\Fixtures\NamedArgumentsDummy::__construct()"?');
+
+        $container = new ContainerBuilder();
+        $bindings = [
+            'string $apiKey' => new BoundArgument('foo'),
+        ];
+        $definition = $container->register(NamedArgumentsDummy::class, NamedArgumentsDummy::class);
+        $definition->setBindings($bindings);
+        $pass = new ResolveBindingsPass();
+        $pass->process($container);
+    }
 }