I have run into an issue where doxygen crashes on an *incorrectly* formatted doxygen tag within a source file instead of providing the user with a helpful error message.  See code below to reproduce the issue with doxygen release v1.8.6, on Windows 7.

/**
 * @file file.c
 * 
 * @addtogroup SomeGroup
 * @{
 */

/**
 * Some function.
 */
void	someFunction( void )
{
}

/**< @} */

Note the incorrect addition of the less than ("<") symbol causes doxygen to crash.

Problem signature:
  Problem Event Name:	APPCRASH
  Application Name:	doxygen.exe
  Application Version:	0.0.0.0
  Application Timestamp:	52b9cc74
  Fault Module Name:	doxygen.exe
  Fault Module Version:	0.0.0.0
  Fault Module Timestamp:	52b9cc74
  Exception Code:	c0000005
  Exception Offset:	000000000018801f
  OS Version:	6.1.7601.2.1.0.256.48
  Locale ID:	4105
  Additional Information 1:	d13f
  Additional Information 2:	d13f983471b1fc894b4a912a00edd2b8
  Additional Information 3:	6acc
  Additional Information 4:	6acc7bd8799c565455f744451906a0f3