Issue in copy and past

[Rafael Dipold 0]

 

Hi,

Can anyone explain to me why this specific sequence of characters, when copying to clipboard and pasting to notepad, windows pastes memory garbage?

 

If I change '42' to '32', for example, this issue not happen

procedure TForm1.Button1Click(Sender: TObject);
var
  C, R: TArray<String>;
begin
  C := [];
  C := C + ['42'];
  C := C + ['N'];
  C := C + ['N'];
  C := C + ['=DOLLAR(4967.32, 2)'];
  C := C + ['=DOLLAR(1515.61, 2)'];
  C := C + ['=DOLLAR(0, 2)'];
  C := C + ['=DOLLAR(58054.89, 2)'];
  C := C + ['=DOLLAR(4084.55, 2)'];

  R := R + [''.Join(#9, C)];

  Clipboard.AsText := ''.Join(#13#10, R);

  ShowMessage('Copy to Clipboard!');
end;

 

[Uwe Raabe 2057]

10 minutes ago, Rafael Dipold said:

when copying to clipboard and pasting to notepad, windows pastes memory garbage?

What does that garbage look like?

[Lajos Juhász 293]

I get:

42    N    N    =DOLLAR(4967.32, 2)    =DOLLAR(1515.61, 2)    =DOLLAR(0, 2)    =DOLLAR(58054.89, 2)    =DOLLAR(4084.55, 2)

 

I cannot spot the garbage.

[Rafael Dipold 0]

42    N    N    =DOLLAR(4967.32, 2)    =DOLLAR(1515.61, 2)    =DOLLAR(0, 2)    =DOLLAR(58054.89, 2)    =DOLLAR(4084.55, 2)
42    N    N    =DOLLAR(4B8r3B4p7yhRXuBWLqsQ546WR43cqQwrbXMDFnBi6vSJBeif8tPW85a7r7DM961Jvk4hdryZoByEp8GC8HzsqJpRN4FxGM9, 2)

For me, even if I copy and paste here on the Forum, it pastes garbage from memory... see second line above.

I will try to install the latest windows updates.. seems to be a windows bug

[Anders Melander 1783]

I would start by examining what it is you put onto the clipboard. You can use a simple clipboard viewer for this but it needs to be able to display the data as hex to be of much use.

The Drag and Drop Component Suite has a Drop Source Analyzer application that can do it. If you're brave you can use the one I have attached.

SourceAnalyzer.zip

[Rafael Dipold 0]

I updated Windows to 22H2, no programs running in the background, and even copying this string from notepad, my string has only memory garbage..

 

Initially I thought it was a bug in Delphi, that's why I posted it here, but now I see that my computer has some glitch, as I tested it on another computer and the bug doesn't happen

 

[Anders Melander 1783]

22 minutes ago, Rafael Dipold said:

no programs running in the background

You might not have started anything manually but there are always programs running in the background. This isn't DOS after all.

I would suggest you run a virus scanner on that system ASAP. My guess is that "something" has hooked into the clipboard chain and is corrupting the clipboard.

 

If the list contains CF_UNICODETEXT then it should also contain CF_TEXT because the clipboard internally synthesizes between the two formats automatically. It is impossible to only have one of them on the clipboard.

[Rafael Dipold 0]

In fact there was a trojan installed, it must have been a few days ago when I tried to install software downloaded via torrent

 

Thank you, problem solved