Vulkan: Better pipeline creation error handling #16357
Merged
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Fixes #16341 .
See #16341 (comment) for the reason - it's basically a failed compile when the fragment shader has an unconditional
discard;
in it, and some followup problems.Fixes mailbox (used by Promise) to accept and keep null values which avoids hanging on null pipelines.
Avoids drawing using null pipelines - we can now survive pipeline creation failures better.
This also somewhat awkwardly lifts the length limit on Android logging by splitting (should really split on line breaks but doesn't yet).