[Libreoffice-bugs] [Bug 127960] New: BASIC - variables of calling procedure zeroed after class method call

[bugzilla-daemon at bugs.documentfoundation.org]

https://bugs.documentfoundation.org/show_bug.cgi?id=127960

            Bug ID: 127960
           Summary: BASIC - variables of calling procedure zeroed after
                    class method call
           Product: LibreOffice
           Version: 6.1.0.3 release
          Hardware: All
                OS: All
            Status: UNCONFIRMED
          Severity: normal
          Priority: medium
         Component: BASIC
          Assignee: libreoffice-bugs at lists.freedesktop.org
          Reporter: ingpaolo at msoft.it

Description:
I've written some basic code to read, modify and write some binary data from my
Garmin Forerunner 10.
I didn't use this macro since a long time. Now I needed to made some change on
a file and the macro stopped working on LibreOffice 6 (I got errors using LO
6.1.0.3, 6.2.5.2, 6.2.7.1, 6.3.1.2).
It continues working perfectly on LibreOffice 5.3.4.2.

The problem comes when the macro calls some Class method: before the call some
internal variables has the expected value (current byte id and current sheet
row). After the call variables are zeroed and so BASIC goes in error state.
This happens with both reading and wrinting file (on different classes)

In the zip attached there are, the ods file with the macros, a txt whit a short
description of the macro usage, some screenshots of the problem as well as the
correct end reading message box, the input and output .FIT files.

Note that with LO 6 is not possible (with this macro) to use F8 to do the
proper debugging, because when the cursor enter the class method, it is
impossible to do anything else. The only way to show you the screeshots with
the modified variable values has been that of using SHIFT+F8

Steps to Reproduce:
Read the file ShortMacroDescription.txt, inside attached zip file


Actual Results:
BASIC error

Expected Results:
Calc sheet compiled with the whole read bynary data converted in human readable
information and modified information written into binary data file


Reproducible: Always


User Profile Reset: No



Additional Info:
I've made test on 5 different computers:
- Ubuntu Linux real PC with LO 6.3.1.2 (ko)
- Suse Linux on VirtualBox with LO 6.2.5.2 (ko)
- Windows 10 real PC with LO 6.1.0.3 (ko)
- Windows 10 on VirtualBox with LO 6.2.7.1 (ko)
- Windows XP on VirtuaBox with LO 5.3.4.2 (the only one working)

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