When cooking the DDC key for a material layers parameter set may become invalid which causes issues reading/writing to the global material shader map and can lead to a crash. See original UDN post for a detailed explanation.

Steps to Reproduce

Create a material using material layers feature.

Cook package.

Cook task may crash.

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Affects Versions4.194.204.21
Target Fix4.22
Fix Commit4734852
CreatedOct 5, 2018
ResolvedJan 16, 2019
UpdatedAug 9, 2019