Fix #2363 - catch possible class not found errors when getting method

src/Psalm/Internal/Analyzer/TypeAnalyzer.php

@@ -1752,6 +1752,9 @@ public static function getCallableMethodIdFromObjectLike(
 
         if ($lhs->isSingleStringLiteral()) {
             $class_name = $lhs->getSingleStringLiteral()->value;
+            if ($class_name[0] === '\\') {
+                $class_name = substr($class_name, 1);
+            }
         } elseif ($lhs->isSingle()) {
             foreach ($lhs->getTypes() as $lhs_atomic_type) {
                 if ($lhs_atomic_type instanceof TNamedObject) {

src/Psalm/Internal/Codebase/Methods.php

@@ -913,7 +913,11 @@ public function getStorage($method_id)
     {
         list($fq_class_name, $method_name) = explode('::', $method_id);
 
-        $class_storage = $this->classlike_storage_provider->get($fq_class_name);
+        try {
+            $class_storage = $this->classlike_storage_provider->get($fq_class_name);
+        } catch (\InvalidArgumentException $e) {
+            throw new \UnexpectedValueException($e->getMessage());
+        }
 
         $method_name_lc = strtolower($method_name);
 

tests/CallableTest.php

@@ -973,6 +973,18 @@ public static function compare($a, $b): int {
                         }
                     }',
             ],
+            'noFatalErrorOnClassWithSlash' => [
+                '<?php
+                    class Func {
+                        public function __construct(string $name, callable $callable) {}
+                    }
+
+                    class Foo {
+                        public static function bar(): string { return "asd"; }
+                    }
+
+                    new Func("f", ["\Foo", "bar"]);',
+            ],
         ];
     }
 
@@ -1507,6 +1519,24 @@ function assertInt(int $int): int {
                     }',
                 'error_message' => 'MixedReturnStatement'
             ],
+            'noFatalErrorOnMissingClassWithSlash' => [
+                '<?php
+                    class Func {
+                        public function __construct(string $name, callable $callable) {}
+                    }
+
+                    new Func("f", ["\Foo", "bar"]);',
+                'error_message' => 'InvalidArgument'
+            ],
+            'noFatalErrorOnMissingClassWithoutSlash' => [
+                '<?php
+                    class Func {
+                        public function __construct(string $name, callable $callable) {}
+                    }
+
+                    new Func("f", ["Foo", "bar"]);',
+                'error_message' => 'InvalidArgument'
+            ],
         ];
     }
 }