Do anybody know what this error means?
It comes and goes in one of my units. Adding a space or a lineshift will sometime solve it, sometime not...
I'm using Delphi 2007.
Here is a Delphi internal error guide that will perhaps help you. Internal error often can be resolved by deleting DCU files, restarting the IDE or not using a tool that speeds up Delphi start (like DelphiSpeedUp).
But in most cases, this is some weird bug in the Delphi compiler and if you know to work around it and this won't be to costy, do this and be happy. I once had the console version dcc32 crashing (IDE compiled fine) when I increased a variable with Inc and using addition instead of Inc solved the problem...
Best thing to do is report this to CodeGear. It really helps if you can find a way to consistently cause the bug on purpose, so they can track it down more easily.
One simple way to get an internal error is to use cut&paste to create a new routine. I moved all code within an IF block to a new procedure and got internal error T2335 at the End of the new proc (in Delphi 7).
The error was caused by the line "If (Something) then Break;". The problem was, this code was no longer within a loop, so there was nothing to break from. Changing 'Break' to 'Exit' fixed the problem.
So look for Break and Continue statements.
All internal errors are things that shouldn't have happened, but did. Check QC and if it isn't there report it. If you can provide a way to reproduce it that will make it more likely they can fix it.
Usually for internal erros I do a full build or restart Delphi.
I've had this problem too, and i've tested many solutions, but non of them helped me.
then i've found this cause of error:
in error occurring function, i had an Inc() func that was trying to inc a String Variable!!
so i've fixed that bug and everything turned to normal :)
I had another case today (D2010), everything perfectly legal syntax since good ol' Turbo Pascal days:
type
TValueRec = record
selector : (int,str,unk);
intVal : Integer;
strVal : WideString;
unkVal : IUnknown;
end;
Using this record in a method of a generics-based class brought me an "F2084 internal error: AV0661CFEF-R0000000C-0" somewhere in the middle of another unit.
Changing it this way did the trick for me:
type
TValueRecSelector = (int,str,unk);
TValueRec = record
selector : TValueRecSelector;
intVal : Integer;
strVal : WideString;
unkVal : IUnknown;
end;
However, very annoying that such things produce such errors at completely unrelated places in the code.
I got this error in one instance:
procedure TDMData.SetValue(AValue: Word);
var
prevValue: Word;
method: TMethod;
begin
if FValue = AValue then
Exit;
prevValue := FValue;
FValue := AValue;
for method in FValueChangeEvent.Notifications do
TDMDataValueChangeNotification(method)(Self, AValue, prevValue);
end; // <--- Fatal: F2084 Internal Error: T2575
Both the GetNotifications Notifications property and the GetEnumerator method of the record returned by GetNotifications had an inline directive. Only by removing the inline from GetEnumerator the problem went away.
Note: similar functions were not causing this internal error!
Related
In my project, i'm trying to connect one more UNIT, named Lang_Unit.pas with some classes and procedures, but, while compiling the Project, Delphi gives unknown error called "[dcc32 Fatal Error] Lang_Unit.pas(5): F2084 Internal Error: AV07953449-R26D7474C-0".
And the point is that, what if i will close my project, or remove this connected UNIT, error is not getting away.
And if i will create clear default VCL Application, its still gives this error.
And only when i'm restarting my Delphi 2010, error is getting away.
But, if i will try to edit something in the code, this error is comes again...
What is problem ? Everything was works fine, im not touched nothing.
I've just turned off my PC, then after some time turned it ON and opened my Project and edited my code, then i see this error...
If Its will help, here is my Lang_Unit.pas code :
unit Languages_UNIT;
interface
Uses
System.Generics.Collections, IniFiles;
Type
TLanguages_List = Class
private
LangType:string;
LangDescription:string;
LangFile:TIniFile;
public
Constructor Create(LType,LDes:string; LFile:TiniFile);
Function GetLangType:string;
Function GetDescription:string;
Function GetStructure:TIniFile;
End;
TLanguages_Controller = Class
public
Function GetStructureByType(RequestedType:string; LangList:TObjectList<TLanguages_List>):TIniFile;
Function TypeExists(RequestedType:string; LangList:TObjectList<TLanguages_List>):Boolean;
Procedure LoadLanguage(RequestedType:string; LangList:TObjectList<TLanguages_List>);
End;
implementation
uses Unit1;
Constructor TLanguages_List.Create(LType,LDes:string; LFile:TiniFile);
Begin
LangType:=LType;
LangDescription:=LDes;
LangFile:=LFile;
End;
Function TLanguages_List.GetLangType:string;
Begin
Result:=LangType;
End;
Function TLanguages_List.GetDescription:string;
Begin
Result:=LangDescription;
End;
Function TLanguages_List.GetStructure:TIniFile;
Begin
Result:=LangFile;
End;
Function TLanguages_Controller.GetStructureByType(RequestedType:string; LangList:TObjectList<TLanguages_List>):TIniFile;
var
i:integer;
Begin
For i := 0 to LangList.Count-1 Do
Begin
IF(LangList[i].GetLangType=RequestedType) Then
Begin
Result:=LangList[i].GetStructure;
Break;
End;
End;
End;
Function TLanguages_Controller.TypeExists(RequestedType:string; LangList:TObjectList<TLanguages_List>):Boolean;
var
i:integer;
GOTYA:Boolean;
Begin
GOTYA:=False;
For i := 0 to LangList.Count-1 Do
Begin
IF(LangList[i].GetLangType=RequestedType) Then
Begin
GOTYA:=True;
Break;
End;
End;
IF(GOTYA) Then
Result:=True
Else
Result:=False;
End;
Procedure TLanguages_Controller.LoadLanguage(RequestedType:string; LangList:TObjectList<TLanguages_List>);
var
i:integer;
SLS:TIniFile;//SELECTED LANGUAGE STRUCTURE
CS:string;//CURRENT SECTION
Begin
//GET SELECTED LANGUAGE STRUCTURE
For i := 0 to LangList.Count-1 Do
Begin
IF(LangList[i].GetLangType=RequestedType) Then
Begin
SLS:=LangList[i].GetStructure;
Break;
End;
End;
//START LOADING SELECTED LANGUAGE
//TABS SECTION LOAD
CS:='TABS';
SD_DEFNAME:=SLS.ReadString(CS,'Speed_Dials','Speed_Dials');
Form1.goleft.Hint:=SLS.ReadString(CS,'Back','Back');
Form1.goright.Hint:=SLS.ReadString(CS,'Forward','Forward');
REFLESHBTN_TEXT:=SLS.ReadString(CS,'Reflesh','Reflesh');
STOPBTN_TEXT:=SLS.ReadString(CS,'Stop','Stop');
//PAGE_POPUP SECTION LOAD
CS:='PAGE_POPUP';
Form1.ChromiumPopup.Items[0].Caption:=SLS.ReadString(CS,'Forward','Forward');
Form1.ChromiumPopup.Items[1].Caption:=SLS.ReadString(CS,'Back','Back');
Form1.ChromiumPopup.Items[2].Caption:=SLS.ReadString(CS,'Reflesh','Reflesh');
Form1.ChromiumPopup.Items[3].Caption:=SLS.ReadString(CS,'Copy_Link','Copy Link');
Form1.ChromiumPopup.Items[4].Caption:=SLS.ReadString(CS,'Save','Save');
Form1.ChromiumPopup.Items[5].Caption:=SLS.ReadString(CS,'Print','Print');
Form1.ChromiumPopup.Items[6].Caption:=SLS.ReadString(CS,'view_source','View Source');
Form1.ChromiumPopup.Items[7].Caption:=SLS.ReadString(CS,'code_debug','Code Debug');
End;
end.
Internal error means that the compiler itself is in a 'confused' state.
The way to get out of this is to:
Save your code in a safe location for later reference.
Restart Delphi
Revert the source code to the last known good state by undoing your last edits, or by loading a temp save file.
You can find the previous files in the _backup folder.
Make sure to set file type to any file.
In order to have Delphi generate a save file upon compilation you need to enable autosave
It's a good idea to have Delphi keep more than the default 10 saves. I like to set it to the max: 90.
Just keep restarting Delphi, and compile a previous version, until the internal error goes away.
Then you just recreate the code in a slightly different manner.
(You did save the original code right?)
I also had this problem (in Delphi 10 Berlin). It started shortly after I changed the name of a component in a frame. It also seemed very persistent. However I found the by right clicking the project and selecting 'Clean' followed by 'Build' solved the problem.
I had this issue with my system drive's memory less than 300mb left. It was especially choking in the cache folder. Prior to this error I had a sensible error (fatal error DBG) when I was attempting to recurse already async functions into a larger async function in a big multi threaded application. The compiler just gave up!(perhaps for circular references and too many subfunctions of a function) The two errors may not be related. But after freeing the system drive to about 2 Gigs upon restart and correcting the above mistake, I did a clean then it compiled just fine.
In my case, the solution for the F2084 error code was to change the encoding from ANSI to UTF8.
In my case, I made several packages that related one to another, and all were built as design and run time packages. But one day, I changed some of them to run-time only packages. After that I experienced this kind of error. It took me hours to realize that I should rebuilt all other related packages. After doing that, the error was away eventually.
Working on a project which uses factories to construct objects. I keep the pointers to the factory functions in vars globally (bad I know) and register them on initialization.
I recently was interested in seeing if the project had memory leaks so decided to download FastMM4 and have a look through. It came up with a few errors that I could fix but this one I'm a bit stumped on seems by me not freeing the memory related to the factory as shown in the code below I'm getting a small memory leak. Not ridiculous but annoying nevertheless.
What would I use to free the memory (if it is that) i've tried dispose(#factoryfunction) but seems to mangle everything. I'm not too good with low level pointer stuff always confuses the hell out of me so if someone could help that would be great.
I've included an example below that i've just written off the top of my head that illustrates the problem I'm having.
Cheers,
Barry
unit Test;
interface
uses classes;
type
TAFactoryFunction = reference to function (const aType : integer): TObject;
function testfunction (const aType : integer) : TObject;
implementation
function testfunction(const aType: integer) : TObject;
begin
result := TObject.Create;
end;
var
FactoryFunction : TAFactoryFunction
initialization
FactoryFunction := testfunction;
finalization
// possibly some freemem code here?
end.
I just tested this in Delphi 2010 and it appears to be a bug. The compiler should generate code to clean that up, but it isn't. Even writing FactoryFunction := nil, as David suggested, doesn't work.
You should report this in QC as an error.
I've added some of the new Generics into my Delphi 2009 program.
In the Structure window of the Delphi IDE, I'm getting a bunch of errors of the form:
'TList` 1' does not contain a member named 'JumpID' at line 1031 (1031:57)
My declarations and lines seem fine to me. And my program Builds without any errors and runs without problems.
The relevent declarations are:
uses
Generics.Collections;
type
TLocJump = record
LocID: string;
JumpID: string;
end;
var
LocJumpList: TList<TLocJump>;
CurCursorID: string;
I: integer;
And this is line 1031 that the message is referring to:
CurCursorID := LocJumpList[I].JumpID;
Could anyone explain what this message is, and what I can do to fix it?
It's a glitch in Error Insight. Really the only thing you can do to fix it is to turn Error Insight off. Or ignore it. It's not fixed in D2010 either. Hopefully it will be in the next version...
you can use like this
CurCursorID := LocJumpList.Items[I].JumpID;
Im not sure if i have explaned this the best i can but, here we go...
I have 2 Custom components on a form, Which are link together at design time through the IDE. Whenever i call a procedure from on of the Component i get the Access violation,
Access violation at address 0049A614
in module 'Project2.exe'. Read of
address 00000034.
This is a small section of my code
TMyClient = class(TClientSocket)
{...}
end;
and...
TPresence = class(TComponent)
private
ftheClient: TMyClient
public
procedure SetStatus(status: string);
published
property UserName : string read fUserName write fUserName;
property theClient: TMyClient read ftheClient write ftheClient;
end;
procedure TPresence.SetStatus(status: string);
begin
try
***** if theClient = nil then
Exception.Create('theClient is Nil');
except
on e:Exception do
MessageDlg(e.classname+', '+e.message, mtWarning, [mbOK], 0);
end;
{...}
end;
0049A614 is at the *****, and the IDE stops here.
I Have also tried to do the assign at run time with
Presence1.theClient := MyClient1;
with no luck
using procedures from Presence1 or MyClient1 that do not rely on each other work fine.
Delphi 7
Follow Up:
from mghie comments, i rethought about it.
I removed the TPresence Component from the form (which caused some strange IDE errors, that might have had something to do with it) and created it design time, assigning everything that was needed. Now it works, but putting the TPresence Component back on the from brings the error back.
Thankyou for your help guys, i should be able to work this one out now, if i can't ill reopen another question :)
You seem to be thinking that the exception is raised because the client field of Presence1 is not set - if you do however get the exception "Read of address 00000034" it means that the Self pointer in the SetStatus() call is nil. That would indicate that you call SetStatus() on an unassigned TPresence reference. It is not really possible to tell the reason for that from the snippet you posted, but it should get you started debugging.
I would still advise you to write a proper setter method for all component references in your own custom components - first because you have a better hook when debugging such problems (you can set a breakpoint there), and second because you should always call TComponent.FreeNotification() on such linked components to be able to track their destruction and set the internal reference to nil.
We probably need more of your code. It is possible you are not correctly creating an instance of TPresence which would give you the error you are experiencing. Try to give us a simple as possible code snippet that causes your error.
I have a function that gives me the following warning:
[DCC Warning] filename.pas(6939): W1035 Return value of function 'function' might be undefined
The function, however, is clean, small, and does have a known, expected, return value. The first statement in the function is:
Result := '';
and there is no local variable or parameter called Result either.
Is there any kind of pragma-like directive I can surround this method with to remove this warning? This is Delphi 2007.
Unfortunately, the help system on this Delphi installation is not working, therefore i can't pop up the help for that warning right now.
Anyone know off the top of their head what i can do?
Are you sure you have done everything to solve the warning? Maybe you could post the code for us to look at?
You can turn off the warning locally this way:
{$WARN NO_RETVAL OFF}
function func(...): string;
begin
...
end;
{$WARN NO_RETVAL ON}
I am not sure that I want to see the code for this unit... after all, the error occurs at line 6939 ... Maybe some internal compiler table have been exceeded?
There seems to be some sort of bug in Delphi. Read this post, the last comment links to other bug-reports that may be the one that you have got:
http://qc.codegear.com/wc/qcmain.aspx?d=8144
The {$WARN NO_RETVAL OFF} is what you are looking for, but generally I like to find out why stuff like this happens. You might consider formatting it differently and seeing if that helps.
Do you have any flow altering commands like Exit in there? Do you directly raise exceptions, etc? Does your case statement have an else at the end that sets a value on Result?
Might try tweaking those elements and see if that eliminates the warning too.
In order to get a good answer for this, you'll have to post the code. In general, the Delphi compiler will give this warning if there is a possible code path that could result in the Result not being defined. Sometimes that code path is less than obvious.
There is such a bug in Delphi compiler since, at least, Delphi4: if sum of numbers of function's parameters (including Self and Result) and local variables exceeds 31, it causes problems. For example, it can write W1035 warnings (result might be undefined). It can miss not used variables. Just try this project:
program TestCompilerProblems;
procedure Proc;
var
a01, a02, a03, a04, a05, a06, a07, a08, a09, a10,
a11, a12, a13, a14, a15, a16, a17, a18, a19, a20,
a21, a22, a23, a24, a25, a26, a27, a28, a29, a30,
a31, a32, a33, a34, a35, a36, a37, a38, a39, a40: Integer;
begin
end;
begin
Proc;
end.
It would cause 31 hint, not 40.