title: Access violation while the program was idle - not trace information to track down the bug
body: <p>I have a program that just popped up an AV. Until now the Eureka Log could find the source code line that generated the error but now it displays only this: </p>
  
  <pre><code>Access violation at address 7E452E4E in module 'USER32.dll'. Read of address 00000015.
  
  Call Stack Information:
  --------------------------------------------------------------------------------------------
  |Address |Module          |Unit         |Class|Procedure/Method                     |Line  |
  --------------------------------------------------------------------------------------------
  |Running Thread: ID=2640; Priority=0; Class=; [Main]                                       |
  |------------------------------------------------------------------------------------------|
  |77F16A7E|GDI32.dll       |             |     |IntersectClipRect                    |      |
  |7E433000|USER32.dll      |             |     |EditWndProc                          |      |
  |7E42A993|USER32.dll      |             |     |CallWindowProcA                      |      |
  |7E42A97D|USER32.dll      |             |     |CallWindowProcA                      |      |
  |7E429011|USER32.dll      |             |     |OffsetRect                           |      |
  |7E4196C2|USER32.dll      |             |     |DispatchMessageA                     |      |
  |7E4196B8|USER32.dll      |             |     |DispatchMessageA                     |      |
  |00625E13|Amper.exe       |Amper.DPR    |     |                                     |76[16]|
  |7C915511|ntdll.dll       |             |     |RtlFindActivationContextSectionString|      |
  |7C915D61|ntdll.dll       |             |     |RtlFindCharInUnicodeString           |      |
  |7C910466|ntdll.dll       |             |     |RtlFreeUnicodeString                 |      |
  |7C80B87C|kernel32.dll    |             |     |IsDBCSLeadByte                       |      |
  |7C9113ED|ntdll.dll       |             |     |RtlDeleteCriticalSection             |      |
  |7C80EEF5|kernel32.dll    |             |     |FindClose                            |      |
  |7C901000|ntdll.dll       |             |     |RtlEnterCriticalSection              |      |
  |7C912CFF|ntdll.dll       |             |     |LdrLockLoaderLock                    |      |
  |7C9010E0|ntdll.dll       |             |     |RtlLeaveCriticalSection              |      |
  |7C912D19|ntdll.dll       |             |     |LdrUnlockLoaderLock                  |      |
  |7C9166C1|ntdll.dll       |             |     |LdrGetDllHandleEx                    |      |
  |7C9166B3|ntdll.dll       |             |     |LdrGetDllHandle                      |      |
  |7C9166A0|ntdll.dll       |             |     |LdrGetDllHandle                      |      |
  |7C912A8D|ntdll.dll       |             |     |RtlUnicodeToMultiByteN               |      |
  |7C912C21|ntdll.dll       |             |     |RtlUnicodeStringToAnsiString         |      |
  |7C901000|ntdll.dll       |             |     |RtlEnterCriticalSection              |      |
  |7C912CC9|ntdll.dll       |             |     |LdrLockLoaderLock                    |      |
  |7C912CFF|ntdll.dll       |             |     |LdrLockLoaderLock                    |      |
  |7C9010E0|ntdll.dll       |             |     |RtlLeaveCriticalSection              |      |
  |7C912D19|ntdll.dll       |             |     |LdrUnlockLoaderLock                  |      |
  |7C90CF78|ntdll.dll       |             |     |ZwAllocateVirtualMemory              |      |
  |7C90CF6E|ntdll.dll       |             |     |ZwAllocateVirtualMemory              |      |
  |7C9010E0|ntdll.dll       |             |     |RtlLeaveCriticalSection              |      |
  |7C80BA57|kernel32.dll    |             |     |VirtualQueryEx                       |      |
  |7C80BA40|kernel32.dll    |             |     |VirtualQueryEx                       |      |
  |7C80BA81|kernel32.dll    |             |     |VirtualQuery                         |      |
  |7C901000|ntdll.dll       |             |     |RtlEnterCriticalSection              |      |
  |7C912CC9|ntdll.dll       |             |     |LdrLockLoaderLock                    |      |
  |7C912CFF|ntdll.dll       |             |     |LdrLockLoaderLock                    |      |
  |7C9010E0|ntdll.dll       |             |     |RtlLeaveCriticalSection              |      |
  --------------------------------------------------------------------------------------------
  </code></pre>
  
  <p>The program was totally idle while I got the error and its window was hidden by other windows. FastMM is active and set to full debug but it indicates no memory overwrite.
  Any hints about how to find the origin of this AV?</p>
  
  <hr>
  
  <p>Win XP, Delphi 7</p>