how to handle the last_error of wl_display

[zou lan]

Dear pekka & All:

I find a wayland application report error about allocate memory fail.
I check the code, after request to weston to allocate dma buffer, it call
wl_display_roundtrip().
But this function return very fast, it doesn't block until the create
events back.

I suspect the display->last_error is not 0. Then the wl_display_roundtrip()
return fast because of the last_error. Does it right?

I find the following log:

wl_display at 1: error 0: invalid object 10

Does the application need to handle the display errors? How could I make
the last_error not impact wl_display_roundtrip?

Thank you.

Best Regards
Nancy
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