Julia Crash on GTK combo

[rossati]

Hi
This issue is about a crash on Julia.
the attached file contains:

• crash.txt
• quotes.txt
• sandbox.jl
• formgen.jl

versioninfo()

Julia Version 1.8.1
Commit afb6c60d69 (2022-09-06 15:09 UTC)
Platform Info:
OS: Windows (x86_64-w64-mingw32)
CPU: 4 × 11th Gen Intel(R) Core(TM) i3-1115G4 @ 3.00GHz
WORD_SIZE: 64
LIBM: libopenlibm
LLVM: libLLVM-13.0.1 (ORCJIT, tigerlake)
Threads: 1 on 4 virtual cores

Minimum reproducible example

Julia> include("sandbox.jl")
This creates a form.

• Choose from the menu Examples Events.
• It appears a second form, choose an Author, for example Alan Perlis.
• The crash appens when the Reset button is clicked.

The statement in the 229 line of formgen.jl generates the crash:
set_gtk_property!(wdgHandles[key],:active,indx)

Best regards
Giovanni Rossati
scripts.zip

[tknopp]

The issue is that change the UI from within a callback, wich is not allowed. You need call it this way:

@idle_add set_gtk_property!(wdgHandles[key],:active,indx)

But actually you can/should do this much higher in the call stack. For instance

id = signal_connect(reset, "button-press-event") do widget, event
       @idle_add setValues()
end

It's important to note that the code after the @idle_add will be postponed and executed after the callback has finished. This may lead to differences.

[rossati]

Thanks