[VarDumper] Fix dumping ThrowingCasterException

Author: nicolas-grekas

src/Symfony/Component/VarDumper/Caster/ExceptionCaster.php

@@ -71,27 +71,17 @@ public static function castThrowingCasterException(ThrowingCasterException $e, a
     {
         $b = (array) $a["\0Exception\0previous"];
 
-        array_splice($b["\0Exception\0trace"], count($a["\0Exception\0trace"]));
-
-        $t = static::$traceArgs;
-        static::$traceArgs = false;
-        $b = static::castException($a["\0Exception\0previous"], $b, $stub, $isNested);
-        static::$traceArgs = $t;
-
-        if (empty($a["\0*\0message"])) {
-            $a["\0*\0message"] = "Unexpected exception thrown from a caster: ".get_class($a["\0Exception\0previous"]);
-        }
-
         if (isset($b["\0*\0message"])) {
             $a["\0~\0message"] = $b["\0*\0message"];
         }
-        if (isset($b["\0*\0file"])) {
-            $a["\0~\0file"] = $b["\0*\0file"];
-        }
-        if (isset($b["\0*\0line"])) {
-            $a["\0~\0line"] = $b["\0*\0line"];
-        }
-        if (isset($b["\0Exception\0trace"])) {
+
+        if (isset($a["\0Exception\0trace"])) {
+            $b["\0Exception\0trace"][0] += array(
+                'file' => $b["\0*\0file"],
+                'line' => $b["\0*\0line"],
+            );
+            array_splice($b["\0Exception\0trace"], -1 - count($a["\0Exception\0trace"]));
+            static::filterTrace($b["\0Exception\0trace"], false);
             $a["\0~\0trace"] = $b["\0Exception\0trace"];
         }
 

src/Symfony/Component/VarDumper/Caster/PdoCaster.php

@@ -59,30 +59,30 @@ class PdoCaster
 
     public static function castPdo(\PDO $c, array $a, Stub $stub, $isNested)
     {
-        $a = array();
+        $attr = array();
         $errmode = $c->getAttribute(\PDO::ATTR_ERRMODE);
         $c->setAttribute(\PDO::ATTR_ERRMODE, \PDO::ERRMODE_EXCEPTION);
 
-        foreach (self::$pdoAttributes as $attr => $values) {
-            if (!isset($attr[0])) {
-                $attr = $values;
-                $values = array();
+        foreach (self::$pdoAttributes as $k => $v) {
+            if (!isset($k[0])) {
+                $k = $v;
+                $v = array();
             }
 
             try {
-                $a[$attr] = 'ERRMODE' === $attr ? $errmode : $c->getAttribute(constant("PDO::ATTR_{$attr}"));
-                if ($values && isset($values[$a[$attr]])) {
-                    $a[$attr] = new ConstStub($values[$a[$attr]], $a[$attr]);
+                $attr[$k] = 'ERRMODE' === $k ? $errmode : $c->getAttribute(constant('PDO::ATTR_'.$k));
+                if ($v && isset($v[$attr[$k]])) {
+                    $attr[$k] = new ConstStub($v[$attr[$k]], $attr[$k]);
                 }
-            } catch (\Exception $m) {
+            } catch (\Exception $e) {
             }
         }
 
         $m = "\0~\0";
-        $a = (array) $c + array(
+        $a += array(
             $m.'inTransaction' => method_exists($c, 'inTransaction'),
             $m.'errorInfo' => $c->errorInfo(),
-            $m.'attributes' => $a,
+            $m.'attributes' => $attr,
         );
 
         if ($a[$m.'inTransaction']) {

src/Symfony/Component/VarDumper/Cloner/AbstractCloner.php

@@ -267,7 +267,7 @@ private function callCaster($callback, $obj, $a, $stub, $isNested)
                 $a = $cast;
             }
         } catch (\Exception $e) {
-            $a["\0~\0⚠"] = new ThrowingCasterException($callback, $e);
+            $a[(Stub::TYPE_OBJECT === $stub->type ? "\0~\0" : '').'⚠'] = new ThrowingCasterException($callback, $e);
         }
 
         return $a;

src/Symfony/Component/VarDumper/Exception/ThrowingCasterException.php

@@ -16,21 +16,12 @@
  */
 class ThrowingCasterException extends \Exception
 {
-    private $caster;
-
     /**
      * @param callable   $caster The failing caster
      * @param \Exception $prev   The exception thrown from the caster
      */
     public function __construct($caster, \Exception $prev)
     {
-        if (is_array($caster)) {
-            if (isset($caster[0]) && is_object($caster[0])) {
-                $caster[0] = get_class($caster[0]);
-            }
-            $caster = implode('::', $caster);
-        }
-        $this->caster = $caster;
-        parent::__construct(null, 0, $prev);
+        parent::__construct('Unexpected exception thrown from a caster: '.get_class($prev), 0, $prev);
     }
 }

src/Symfony/Component/VarDumper/Tests/CliDumperTest.php

@@ -102,6 +102,58 @@ public function testGet()
   b"bin-key-é" => ""
 ]
 
+EOTXT
+            ,
+            $out
+        );
+    }
+
+    public function testThrowingCaster()
+    {
+        $out = fopen('php://memory', 'r+b');
+
+        $dumper = new CliDumper();
+        $dumper->setColors(false);
+        $cloner = new VarCloner();
+        $cloner->addCasters(array(
+            ':stream' => function () {
+                throw new \Exception('Foobar');
+            },
+        ));
+        $line = __LINE__ - 3;
+        $file = __FILE__;
+        $ref = (int) $out;
+
+        $data = $cloner->cloneVar($out);
+        $dumper->dump($data, $out);
+        rewind($out);
+        $out = stream_get_contents($out);
+
+        $this->assertStringMatchesFormat(
+            <<<EOTXT
+:stream {@{$ref}
+  wrapper_type: "PHP"
+  stream_type: "MEMORY"
+  mode: "w+b"
+  unread_bytes: 0
+  seekable: true
+  uri: "php://memory"
+  timed_out: false
+  blocked: true
+  eof: false
+  options: []
+  ⚠: Symfony\Component\VarDumper\Exception\ThrowingCasterException {#%d
+    #message: "Unexpected exception thrown from a caster: Exception"
+    message: "Foobar"
+    trace: array:1 [
+      0 => array:2 [
+        "call" => "%s{closure}()"
+        "file" => "{$file}:{$line}"
+      ]
+    ]
+  }
+}
+
 EOTXT
             ,
             $out