From a UDN thread:

When cooking, we are seeing hundreds of warnings of the format "Compiler Warning A node that generated no code of it's own ( X ) tried to inject code into Y". There isn't anything that seems obviously wrong with the blueprint logic. The node is often a Select, but sometimes it is a Get or a structure Break. The target is often a Return Node, but sometimes other functions.

I noticed that these warnings only appear when packaging with the new nativize blueprints feature. The simple project I posted ... has a few warnings like this.

I've attached the sample project the user shared.

Steps to Reproduce

Cook (with nativization enabled) the the attached project, see the log for warnings:
"A node that generated no code of it's own (@@) tried to inject code into @@. %s"

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There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-33021 in the post.

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Fix Commit3232437
Main Commit3236017
CreatedJul 11, 2016
ResolvedDec 13, 2016
UpdatedFeb 5, 2017