Values of variables are not displayed
lazarus / 12-Debugger

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Flomo · 2023-08-24 19:21

Hi,

working with Lazarus IDE 2.2.4, developing for Windows.

When letting the program stop at a breakpoint, I can hover the mouse
over a variable name or an object property like TEdit.Text.
My problem: Instead of the value, the tooltip only shows three
question marks. When using the debugging window instead to display the
value for TEdit.Text, it shows an error <Error: Member not found:
Text>

I have searched various forums and wikis but can't find anthing
helpful.

Any help is greatly appreciated.

Florian

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Lulu · 2023-08-24 19:41

Hi,
TEdit.Text is a property with getter/setter (a procedure and function
to read and write the content), the debugger can't directly access its
value.
You can use a workaround using an intermediary variable like this:
Code: Pascal  [Select][+][-]window.onload = function(){var x1 =
document.getElementById("main_content_section"); if (x1) { var x =
document.getElementsByClassName("geshi");for (var i = 0; i var
debugStr: string;...debugStr := Edit1.Text; // put a breakpoint here
When your program stops its execution, press F8 and move your mouse
over debugStr, the IDE will show you its content.

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Martin_fr · 2023-08-25 05:12

Quote from: Flomo on August 24, 2023, 09:21:37 pm
When letting the program stop at a breakpoint, I can hover the mouse
over a variable name or an object property like TEdit.Text.
My problem: Instead of the value, the tooltip only shows three
question marks. When using the debugging window instead to display the
value for TEdit.Text, it shows an error <Error: Member not found:
Text>

Unfortunately an issue with the FPC compiler.

Equally, many methods will not work with the "function evaluation"
feature of the debugger. The FPC team so far has not reacted to a
proposal to resolve this
https://gitlab.com/freepascal.org/fpc/source/-/merge_requests/448
And this is a first required step to eventually (maybe) solve the
property issue.

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Flomo · 2023-08-25 06:04

Martin and Lulu,

thanks for this piece of information. Coming from Delphi, I thought
Lazarus would behave similar.

Florian