To refer to the original cause of the crash ...
Unfortunately the compiler doesn't find such problems (negative array index
variable), this is a typical runtime problem. All what you can do is to write
"defensive" code, e.g. checking the value of an index variable, using error
handler, don't
Aloha,
Thanks for the tip. Tons and tons of errors in the first run of Check Syntax in
the compiler. It is nice that it highlights the line numbers/issues in an open
method. The errors though are mostly or all, “The Variable xxx has not been
explicitly declared in the typing methods.” As I
Aloha Sannyasin,
I probably sound like a broken record talking about the compiler so much, but I
really wanted to comment on this:
> As this is an internal database for our non-profits, it’s run in interpreted
> mode, so no compiler checking done.
> I do a decent amount of the programing (for
Thanks! I’ll be using both of those tips. I haven’t used On Error Call much,
but will look into it. At a minimum, I want: “On Error, don’t crash my server!"
Sannyasin Siddhanathaswami
On Apr 7, 2017, 9:12 AM -1000, wrote:
Sannyasin,
Two things:
I make it a habit to check for -1 anywhere I'm
Sannyasin,
Two things:
I make it a habit to check for -1 anywhere I'm using Find in array... it
just bites me if I don't.
For methods that run on the server, or even better for processes that run
on the server, wrap them in an On err call method that lets you manage the
errors yourself. Like not
Aloha,
Yes. The crash did happen when accessing an array with a negative index! If
that’s the only thing that causes the crash, I can be extra careful about that
and do checks. Thanks for pointing this out. And yes, I wrote that serious bug.
:)
As this is an internal database for our
> What compiler settings do you use?
Do you have the range checking ON (top option in the compiler settings)? If not
you should.
--
Neil Dennis
4D Developer since 1990
GreaText - Designing Software for the Way You Work
716 East 1850 N
North Ogden, UT 84414
mailto:npden...@greatext.com
Behalf Of Joshua Hunter
> via 4D_Tech
> Sent: Thursday, April 6, 2017 11:56 PM
> To: 4D iNug Technical <4d_tech@lists.4d.com>
> Cc: Joshua Hunter <jos...@dwdev.com>
> Subject: RE: 4D Server Crashes When Tracing Buggy Web Connection Code
>
> The web server proces
: Thursday, April 6, 2017 2:14 PM
To: 4D iNug Tech
Cc: Sannyasin Siddhanathaswami
Subject: 4D Server Crashes When Tracing Buggy Web Connection Code
Aloha,
If I trace On Web Connection code on 4D Server v15.3 Mac, and I goof and
reference an out of index array (I know I’m the first to ever do
Aloha,
If I trace On Web Connection code on 4D Server v15.3 Mac, and I goof and
reference an out of index array (I know I’m the first to ever do that), our
server crashes. It just quits to the Finder, no error message nothing. I view
the trace via screen sharing to the server machine.
This is
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