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    <p>Wow, people still use LCC... Last time I used it was ~10 years ago.</p> <p>I decompiled <code>wedit.exe</code> and can confirm there is no official way to disable this behavior.</p> <p>I patched the binary if that works for you. I uploaded it <a href="http://www.box.com/s/t2hygokia5y5g7qr4ehx" rel="nofollow noreferrer">here</a>.</p> <p>To those who concerned about viruses and such I patched <code>wedit</code> taken from <a href="http://www.cs.virginia.edu/~lcc-win32/lccwin32.exe" rel="nofollow noreferrer">here</a>. About box says it's version 4.0 compiled at Sep 16 2009.</p> <p>Here is patched function to those who interested:</p> <pre><code>int __cdecl sub_44CF0D(HANDLE hProcess) { int result; // eax@1 int v2; // ST0C_4@10 int v3; // eax@20 int v4; // eax@23 int v5; // eax@25 int v6; // [sp+10h] [bp-68h]@11 int v7; // [sp+14h] [bp-64h]@1 struct _DEBUG_EVENT DebugEvent; // [sp+18h] [bp-60h]@1 v7 = 1; result = WaitForDebugEvent(&amp;DebugEvent, dwMilliseconds); if ( result ) { sub_44C67A(&amp;DebugEvent); if ( DebugEvent.dwDebugEventCode == 1 ) { if ( DebugEvent.u.Exception.ExceptionRecord.ExceptionCode == EXCEPTION_ACCESS_VIOLATION &amp;&amp; !(dword_482860 &amp; 1) &amp;&amp; !dword_484328 &amp;&amp; DebugEvent.u.Exception.dwFirstChance ) { sub_44E1A5(0); sub_44CEB2(v2); return ContinueDebugEvent(DebugEvent.dwProcessId, DebugEvent.dwThreadId, 0x80010001u); } v6 = 0; v7 = sub_44D2C4((int)&amp;DebugEvent, hProcess, (int)&amp;v6); if ( v6 &amp;&amp; DebugEvent.u.Exception.dwFirstChance ) return ContinueDebugEvent(DebugEvent.dwProcessId, DebugEvent.dwThreadId, 0x80010001u); goto LABEL_41; } if ( DebugEvent.dwDebugEventCode == 3 ) { if ( dword_483C94 ) { dword_48428C = 1; LABEL_41: if ( dword_483C6C ) sub_44ECDC(); if ( v7 ) { result = ContinueDebugEvent(DebugEvent.dwProcessId, DebugEvent.dwThreadId, 0x10002u); } else { dword_49BF68 = 1; ResetEvent(dword_484AE4); dword_4843C8 = DebugEvent.dwThreadId; result = sub_4524CD(); } return result; } Sleep(0x32u); dword_49BF64 = 1; dword_49BF68 = 1; qword_483C74 = __PAIR__( (unsigned int)DebugEvent.u.Exception.ExceptionRecord.ExceptionAddress, DebugEvent.u.Exception.ExceptionRecord.ExceptionInformation[2]); if ( dword_484288 ) ::hProcess = (HANDLE)DebugEvent.u.Exception.ExceptionRecord.ExceptionFlags; else ::hProcess = hProcess; dword_483C84 = DebugEvent.dwProcessId; hThread = DebugEvent.u.Exception.ExceptionRecord.ExceptionRecord; dword_483C9C = (HANDLE)DebugEvent.u.Exception.ExceptionRecord.ExceptionCode; dwThreadId = DebugEvent.dwThreadId; dword_483C94 = 0; if ( sub_45A83A() ) { v4 = sub_4026A6(28); dword_484330 = v4; *(_DWORD *)(v4 + 4) = hThread; *(_DWORD *)(v4 + 8) = dwThreadId; if ( dword_484288 ) { sub_455B58(); } else { Sleep(0x64u); v5 = sub_45AAFC(); if ( !v5 ) return PostMessageA(dword_4849EC, 0x111u, 0x64u, 0); if ( dword_484354 ) goto LABEL_50; sub_455B58(); if ( dword_483C70 &amp;&amp; *(_DWORD *)(dword_483C70 + 52) ) *(_DWORD *)(*(_DWORD *)(dword_483C70 + 52) + 36) = sub_451577(**(_DWORD **)(dword_483C70 + 52), 1u); v5 = *(_DWORD *)(dword_483C70 + 52); if ( v5 &amp;&amp; *(_DWORD *)(v5 + 36) ) { LABEL_50: if ( !dword_483C6C ) sub_44E92A(v5); sub_44CC3D(); sub_451600(); PostMessageA(dword_4849EC, 0x111u, 0x154u, 0); } else { sub_4029CA("Imposible to find %s\nRunning without source display", *(_DWORD *)(dword_483C70 + 20)); dword_484344 = 1; v7 = 1; PostMessageA(dword_4849EC, 0x111u, 0x154u, 0); } } goto LABEL_41; } dword_484338 = 1; v3 = sub_44DB56(qword_483C74); if ( v3 ) *(_BYTE *)(v3 + 29) &amp;= 0xFDu; result = ContinueDebugEvent(DebugEvent.dwProcessId, DebugEvent.dwThreadId, 0x10002u); } else { if ( DebugEvent.dwDebugEventCode != 5 ) goto LABEL_41; if ( DebugEvent.dwProcessId != dword_483C84 ) { v7 = 1; goto LABEL_41; } dword_49BF64 = 0; dword_49BF68 = 1; dword_481614 = 0; result = sub_402A32(4520, SLOBYTE(DebugEvent.u.Exception.ExceptionRecord.ExceptionCode)); if ( !dword_483C6C ) result = sub_40B155(lpCmdLine); } } else { if ( dword_483C6C ) result = sub_44ECDC(); } return result; } </code></pre> <p><code>if</code> under <code>LABEL_50</code> is what I patched (from 0x75 to 0xEB).</p> <p>It was easy to spot the place because I expected <a href="http://msdn.microsoft.com/en-us/library/windows/desktop/ms681674%28v=vs.85%29.aspx" rel="nofollow noreferrer">WriteProcessMemory</a> to be used to write 0xCC at entry-point of application that is being debugged.</p>
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    1. COWell, I wanted to wait a while before marking this as the answer, just in case some other solution provided itself. This certainly solves the problem, just not as elegantly as I had hoped. Thanks for the solution!
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