osltoy QLayout error when you hit the "Recompile" button

[etheory]

Hi there!

When I compile OpenShadingLanguage-1.10.9 with the following dependencies:

• OpenImageIO-2.1.11.0
• Qt_vfx-5.12.6
• OpenEXR-2.4.0

on CentOS Linux release 7.4.1708 (Core)

When I launch it like so:

• gdb --args osltoy shaders/mandelbrot.osl

and then hit "Recompile", I get the following error/segfault:

QLayout: Attempting to add QLayout "" to OSL_v1_10::OSLToyMainWindow "", which already has a layout
Thread 2 "osltoy" received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7fffd7557700 (LWP 215165)]
0x000000000041b6e4 in std::_Function_handler<void (int), OpenImageIO_v2_1::thread_pool::push<OSL_v1_10::OSLToyMainWindow::timed_rerender_trigger()::$_0>(OSL_v1_10::OSLToyMainWindow::timed_rerender_trigger()::$_0&&)::{lambda(int)#1}>::_M_invoke(std::_Any_data const&, int&&) ()

Is anyone else getting a similar issue, and if so, any ideas how to solve it?

Thanks!

Luke

[Sam Hodge at GMail]

Let me google that for you Luke

https://forum.qt.io/topic/53814/qlayout-attempting-to-add-qlayout-to-mainwindow-which-already-has-a-layout-solved

Seems you need a QWidget in between the QMainWindow and the QLayout.

Does it do the same thing with all shaders you throw at otoy, or is it specific to Mandelbrot?

I haven’t tried it out but it sounds interesting, I will see if I can spin up a development context similar to yours and give it a try.

Sam

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[Luke Emrose]

Hi Sam!

Nice to hear from you.

Yes of course I googled it. I even tried to fix it in the source code but I wasn't successful. Since this is in the OSL source itself I assumed I'd done something wrong and other people had this working.

All shaders show this behavior in my setup that was just my example case.

Cheers,

L

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