Editor will crash if a material uses ImposterCaptureSwitch material function after build lighting

1. Download the project !ImposterDebug.zip|width=7,height=7,align=absmiddle!which enabled the Imposter Baker plugin and used the ImposterCaptureSwitch material function.
2. Open the project with 5.4 and build lighting.

It will crash(see the attachments)

[UE-23848] Bug Status

i have this problem UE4CC-Windows-58DC12AF4B97F057BD108FBFF569B2E9_0000

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