Confirmed fixed in r13195 as tested with the application in which this
was originally discovered, thanks Jonas.
Bruce Tulloch wrote:
> I've reported this as an FPC bug:
>
> http://bugs.freepascal.org/view.php?id=13820
>
> Cheers, Bruce.
>
___
fpc-pa
Frank,
I think the crux of the matter here is how to make the distinction between a
pointer with 'no value' and one that is initialized or set to the 'lowest
possible value in the range'. The quote I mentioned comes directly from
Borland's Object Pascal Langage Manual
You can check on this, but
Prince Riley wrote:
Hello,
I had a chance to go to a reference and check on what the reserved word
'nil' , a special constant, seems to mean. According to the Object
Pascal manual (Borland) ...
"The reserved word nil is a special constant that can be assigned to any
pointer. When nil is ass
On Mon, 25 May 2009 21:09:44 +
Prince Riley wrote:
> Type checking for valid
> pointer arithmetic and the difference between a 'null' or empty pointer
> and one that has the lowest value of it's type.
Maybe the use of 'nil' in an expression should not be allowed at all
(except comparisons).
Jonas
Thank you Jonas, for clearing that up. I agree.
You have more courage than I my friend to say that, for down that path lies
monsters. For while I must agree with your point, in theory it raises a
bigger concern.
The 'nil' for a pointer constant is problematic in two ways. Fixing this
'bug
On 25 May 2009, at 22:39, Prince Riley wrote:
That's a very interesting answer. So am I understanding you to say
that the
expression of the form
var := constant + numeric literal ;
is an invalid expression (syntax) in Object Pascal?
No, I meant that there was a bug (error) in the compiler
Jonas,
Thanks for the reply.
That's a very interesting answer. So am I understanding you to say that the
expression of the form
var := constant + numeric literal ;
is an invalid expression (syntax) in Object Pascal?
Why would the expression adding a numeric literal and a numeric constant
creat
Hello,
I had a chance to go to a reference and check on what the reserved word
'nil' , a special constant, seems to mean. According to the Object Pascal
manual (Borland) ...
"The reserved word nil is a special constant that can be assigned to any
pointer. When nil is assigned to a pointer, the po
On 25 May 2009, at 19:48, Prince Riley wrote:
There seems to be a bigger issue on this... but perhaps someone else
confirm
that the following programs, similar to the failing one, work.
That's because the error was in the constant evaluation (nil and 1 are
both constants).
Jonas
__
I get an internal error 200502052 when building a library on fc10 with
lazarus 0.9.26.2/fpc 2.2.2 and a recent nightly build with fpc 2.2.4.
It is raised by the following procedure from aasmtai.pas:
procedure tai_cpu_abstract.loadref(opidx:longint;const r:treference);
begin
alloca
Hello,
There seems to be a bigger issue on this... but perhaps someone else confirm
that the following programs, similar to the failing one, work.
program test1;
var
p: Pointer;
begin
p := nil;
p := p + 1;
end.
Does work and the following program
program test2;
var
I've reported this as an FPC bug:
http://bugs.freepascal.org/view.php?id=13820
Cheers, Bruce.
Bruce Tulloch wrote:
> I think I've nailed and example of the problem; when Copy() is called
> with the result of another Copy() the reference count for the returned
> array is not managed correctly w
I think I've nailed and example of the problem; when Copy() is called
with the result of another Copy() the reference count for the returned
array is not managed correctly when compiled with -MDelphi.
A trivial example program, copytest.pas:
program copytest;
var
S, D : array of Inte
On 25 May 2009, at 10:30, Bruce Tulloch wrote:
PS: does the attribute "compilerproc" mean the function is defined
to be
called by the compiler implicitly? We have rebuilt the FPC RTL with
debug enabled to further diagnose what's happening here (which is
why we
came across it).
It means t
On 25 May 2009, at 07:04, César Espinoza wrote:
how can I use mysql 5.0 in mac OS X 10.5 Intel?
I did it in OSX 10.4 ppc, but not in 10.5 Intel
I get the message ld: library not found for -llmysqlclient
Install the MySQL libraries. They are not installed by default on
either Mac OS X 10.4
Ok, I don't think that caveat does not applies in this case, we neither
call halt nor share these particular variables between threads (we do
have threads in this application however). What we do see when freeing
(ie, assigning to nil) some of these variables is a jump from recount =
1 (as we expec
On 25 May 2009, at 07:38, Bruce Tulloch wrote:
Are we correct to assume that as soon as no variable in our program,
be
it global, static, object field or property, refers to a dynamic
array,
the dynamic array will be released. Are we also correct to assume that
the reassignment of any varia
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