delphifreepascallazarus

Project raised exception class 'External: SIGSEGV' with blank Lazarus App

I see that other people have gotten similar errors in both Delphi (#1, #2) and Lazarus (#1, #2, #3, #4) on StackOverflow, but none of them have it using just a new blank app.

I have a completely brand new blank app in Lazarus, but I keep getting the following error when I close the compiled app:

Project project1 raised exception class 'External: SIGSEGV'. At address 75BFC86FA39E

This errors pops up every time I close the app.

My Form is empty:

Lazarus Empty Form

And nothing in my Unit except the empty form:

unit Unit1;

{$mode objfpc}{$H+}

interface

uses
  Classes, SysUtils, Forms, Controls, Graphics, Dialogs, StdCtrls;

type

  { TForm1 }

  TForm1 = class(TForm)
  private

  public

  end;

var
  Form1: TForm1;

implementation

{$R *.lfm}

{ TForm1 }

end.

None of the other questions on StackOverflow are the same as mine, because they're getting errors after doing certain code whereas I have not written any code yet. This is literally just a new blank app.

What could be the cause of this? It's just a standard blank app.

This is my Lazarus Version: Lazarus 4.0 (rev Unknown) FPC 3.2.2 x86_64-linux-qt6

Solution

  • Thanks @zeljan for answering my question in the comments.

    Looks like this is a bug in the Lazarus 4.0 IDE with QT6 backend.

    It'll be fixed in Lazarus 4.2 Stable: https://gitlab.com/freepascal.org/lazarus/lazarus/-/issues/41470

    So if anyone has this issue in the future, just update your Lazarus IDE to the latest version.