- Problem solved again

From: Martin, Marc <"Martin,>
Date: Wed, 6 Sep 2006 10:11:13 -0700

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Hi Alexander,

> The only thing I can imagine is that "SetDC" that I removed from
> HostWindows. To check whether it is the trouble, please, combine
> HostWindows from the old patch with HostPorts and Services from the
> new patch.

Yes, I don't get a trap when I combined HostWindows from the first
fix with HostPorts and Services from the second fix.


> What's interesting about this trap is that it doesn't point to a
> modified code. It points to Ports module instead of HostPorts.
> What is the exact position of NIL dereference?

The error is shown to be in Ports, in the PROCEDURE (f: Frame) Input*,
at the very first line:

  f.rider.Input(x, y, modifiers, isDown);

> As I can see from above, "f" is assigned. "f.unit", "f.gx" and
> "f.gy" are all INTEGERs, so nothing to dereference here. The
> only thing that may be NIL is "f.rider" which is not shown
> in this trap.

Yes indeed, f.rider is NIL:

  Ports.Frame.Input:f^

  [0114DFB0H] Views.StdFrame^
.unit INTEGER 0
.dot INTEGER 9525
.rider Ports.Rider NIL
.gx INTEGER 63500
.gy INTEGER 63500
.l INTEGER 0
.t INTEGER 0
.r INTEGER 0
.b INTEGER 0
.view Views.View NIL
.front BOOLEAN FALSE
.mark BOOLEAN FALSE
.state BYTE 2
.x INTEGER 63500
.y INTEGER 63500
.gx0 INTEGER 63500
.gy0 INTEGER 63500
.sx INTEGER 0
.sy INTEGER 0
.next Views.Frame NIL
.down Views.Frame NIL
.up Views.Frame NIL
.focus Views.Frame NIL
.level INTEGER 0

Marc

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Received on Wed Sep 06 2006 - 19:11:13 UTC