delete[] operator fails (and aborts) in certain cases (C6000 7.4.14)

Preconditions:

1. Class must be formed in a way which causes the compiler to call __cxa_vec_new with a prefix size of 8 when performing an array allocation
   1. Unclear what conditions cause this.  In my sample, the class contains only two member variables, a std::string and a long long.  If either of these is removed, or their types are changed, the compiler uses a prefix size of 4, which does not provoke the failure.
2. Typedef alias created to said class
3. Array of objects allocated via the typedef

Result:

Given the above scenario, calling delete[] on the pointer returned by new[] will cause SYS/BIOS to abort.

Cause:

The compiler generated a call to __cxa_vec_new with a prefix size of 8.  However, for the delete, it generates the __cxa_vec_delete call with a prefix size of 4.  The mismatched prefix sizes causes __cxa_vec_delete to calculate the incorrect array_ptr to delete/free.

Workaround:

Use the original class definition, not the typedef.  In which case, both the new and the delete calls are made with the same prefix size of 8.

Tested Compilers:

Present in both 7.4.13 and 7.4.14.

Not present in 7.3.15 (does not generate calls to __cxa_vec_new/__cxa_vec_delete).

Sample Code:

#include <string>

class MyClass
{
private:
  std::string mString;
  long long   mLongLong;
};
typedef class MyClass MyTypeDef;

void testFunc()
{
  MyClass* myClass_ = new MyClass[2];       // Calls __cxa_vec_new w/ prefix = 8
  delete[] myClass_;                        // Calls __cxa_vec_delete w/ prefix = 8; Succeeds
  MyTypeDef* myTypeDef = new MyTypeDef[2];  // Calls __cxa_vec_new w/ prefix = 8
  delete[] myTypeDef;                       // Calls __cxa_vec_delete w/ prefix = 4; ABORTS
}

Compiler Options:

-pden -mv6600 -qq -pds383 -@ C:\Git\in-sight-vision\In-Sight_FW\br\tools\build\\..\..\bin\SYSBios-elf-tda2xx_c66x-is8000-debug\generated/compiler.opt -as -mi10000 -mr1 -ms1 -qq -pds303 -pds238 -s -mi10000 -ml2 -mr1 -ms1 -pds112 -g -pds188 -eo=.obj