Wrong parameters for Exception([string $message [, long $code [, Throwable $previous = NULL]]]).

Author: prwater

src/FormattedException.php

@@ -79,7 +79,7 @@ public static function formattedConstruct($args): array
   {
     $code     = 0;
     $previous = null;
-    $format   = array_shift($args);
+    $format   = array_shift($args) ?? '';
 
     if (is_array($format))
     {

test/FormattedExceptionTestBase.php

@@ -104,6 +104,42 @@ public function testFormattingMissingArgs1(): void
     }
   }
 
+  //--------------------------------------------------------------------------------------------------------------------
+  /**
+   * Test formatting null string.
+   */
+  public function testFormattingNull1(): void
+  {
+    try
+    {
+      $format = null;
+
+      throw new self::$class($format);
+    }
+    catch (Exception $e)
+    {
+      self::assertSame('', $e->getMessage());
+    }
+  }
+
+  //--------------------------------------------------------------------------------------------------------------------
+  /**
+   * Test formatting null string and bogus arguments.
+   */
+  public function testFormattingNull2(): void
+  {
+    try
+    {
+      $format = null;
+
+      throw new self::$class($format, 'bogus', 123);
+    }
+    catch (Exception $e)
+    {
+      self::assertSame('', $e->getMessage());
+    }
+  }
+
   //--------------------------------------------------------------------------------------------------------------------
   /**
    * Test formatting string with missing arguments.