How to debug division by zero exception in Internet Explorer?
Exception EZeroDivide in module mshtml.dll at 00378B89.
Floating point division by zero.

Exception raised by object: TEmbeddedWB


Full Exception Details:
EZeroDivide
ExceptionCode: 0xC000008E (EXCEPTION_FLT_DIVIDE_BY_ZERO)
The thread tried to divide a floating-point value by a floating-point divisor of zero.
ExceptionFlags: 0x00000002
ExceptionAddress: 0x574C8B89
Parameters: (0x00000000)
EXCEPTION_RECORD: nil
Message: Floating point division by zero


Stack Trace:
[574C8B89] Unknown function at DllGetClassObject + $FF033
[004CA61E] OleCtrls.TOleControl.WndProc (Line 2171, "olectrls.pas" + 12) + $10
[006CF62A] EmbeddedWB.TEmbeddedWB.WBWndProc (Line 1492, "EmbeddedWB.pas" + 31) + $8
[0046200C] Forms.StdWndProc (Line 1459, "Forms.pas" + 8) + $0
[0046D2A2] Forms.TApplication.IsKeyMsg (Line 6588, "Forms.pas" + 20) + $1E
[0046D43F] Forms.TApplication.ProcessMessage (Line 6626, "Forms.pas" + 9) + $2A
[0046D4AB] Forms.TApplication.HandleMessage (Line 6649, "Forms.pas" + 1) + $6
[0046938C] Forms.TCustomForm.ShowModal (Line 4692, "Forms.pas" + 22) + $5
[007D72AD] FMain.TfrmMain.actControlPanelExecute (Line 566, "FMain.pas" + 5) + $5
[00424AF5] Classes.TBasicAction.Execute (Line 8077, "Classes.pas" + 3) + $9
[00455369] ActnList.TContainedAction.Execute + $31
[0045B6AE] Menus.TMenuItem.Click (Line 1738, "Menus.pas" + 9) + $8
[0045CD71] Menus.TMenu.DispatchCommand (Line 2446, "Menus.pas" + 5) + $5

ModLoad: 00000000`75360000 00000000`75372000   C:Windowssyswow64DEVOBJ.dll
ModLoad: 00000000`71940000 00000000`719fa000   C:WindowsSysWOW64d2d1.dll
ModLoad: 00000000`715e0000 00000000`716ea000   C:WindowsSysWOW64DWrite.dll
ModLoad: 00000000`71870000 00000000`718f3000   C:WindowsSysWOW64dxgi.dll
ModLoad: 00000000`74fb0000 00000000`74fdd000   C:Windowssyswow64WINTRUST.dll
ModLoad: 00000000`71db0000 00000000`71ddc000   C:WindowsSysWOW64d3d10_1.dll
ModLoad: 00000000`71900000 00000000`7193a000   C:WindowsSysWOW64d3d10_1core.dll
ModLoad: 00000000`6e5c0000 00000000`6e6ec000   C:WindowsSysWOW64D3D10Warp.dll
ModLoad: 00000000`6d480000 00000000`6d63b000   C:WindowsSysWOW64jscript9.dll
ModLoad: 00000000`714f0000 00000000`714fb000   C:WindowsSysWOW64msimtf.dll
ModLoad: 00000000`6f080000 00000000`6f0ab000   C:WindowsSysWOW64msls31.dll
ModLoad: 00000000`082c0000 00000000`082fc000   C:WindowsSysWOW64Oleacc.dll
ModLoad: 00000000`613e0000 00000000`6140e000   C:WindowsSysWOW64MLANG.dll
ModLoad: 00000000`62bb0000 00000000`62cb2000   C:WindowsSysWOW64d3d10.dll
ModLoad: 00000000`62b70000 00000000`62ba3000   C:WindowsSysWOW64d3d10core.dll
(834.d04): Unknown exception - code c000008e (first chance)

procedure TfrmControlPanel.FormCreate(Sender: TObject);
begin
FSaved8087CW := Default8087CW;  // Save this because Set8087CW changes it.
Set8087CW($027F); //restore later using Set8087CW(FSaved8087CW);
       //$027F comes from http://msdn.microsoft.com/en-us/library/ms235300.aspx

   {
      Scrolling in browser was causing floating point exceptions

      http://stackoverflow.com/questions/9472265/how-to-debug-division-by-zero-exception-in-internet-explorer

      What it boils down to is that MS habitually compile their code with FP exceptions masked.
      Embarcadero tools habitually unmask them. Thus the MS code is written assuming that FP exceptions
      will not be raised and is not resilient to them. To deal with that you have to mask the exceptions
      before calling into the MS code. If your app does not floating point then just mask the exceptions
      at start up and be done with it. Call Set8087CW($027F) at start up and you are good to go.

            Default8087CW: $1332  = 0001 0011 0011 0010
            New 8087CW:    $027F  = 0000 0010 0111 1111
                                    ...I RCPC ..MM MMMM

        Bit  0: Invalid Operation (IM)  |
        Bit  1: Denormal Operand (DM)   |
        Bit  2: Zero Divide (ZM)        | Exception Masks (Bits 0..5)
        Bit  3: Overflow (OM)           | When one of these mask bits is set, its corresponding x87 FPU
        Bit  4: Underflow (UM)          | floating-point exception is blocked from being generated
        Bit  5: Precision (PM)          |
        Bit  6:  (reserved)
        Bit  7:  (reserved)
        Bit  8: +Precision Control (PC) 00=Single Precision (24 bits), 10=Double Precision (53 bits), 11=Double Extended Precision (64 bits), 01=reserved
        Bit  9: /
        Bit 10: + Rounding Control (RC)
        Bit 11: /
        Bit 12: Infinity Control        | not meaningful for anything past the 80287 math coprocessor
        Bit 13:  (reserved)
        Bit 14:  (reserved)
        Bit 15:  (reserved)
    }