TYPO3 Core

If it is included using an <INCLUDE> directive, certain other TS (Plugin rendering definitions) is not included. The problematic commit is
3ce53655a3739dadd732556e1902e7686ef59260 (https://review.typo3.org/#/c/27587/).

Steps to reproduce:

1. Create a new TYPO3 installation using the current master branch.
2. Install the development branch of EXT:flux (https://github.com/FluidTYPO3/flux)
3. Install the development branch of EXT:fluidcontent (https://github.com/FluidTYPO3/fluidcontent)

Create a new root page with the following root template:

Constants:

<INCLUDE_TYPOSCRIPT: source="FILE:EXT:css_styled_content/static/constants.txt">

Setup:

<INCLUDE_TYPOSCRIPT: source="FILE:EXT:css_styled_content/static/setup.txt">
page = PAGE
page.10 < styles.content.get

4. Check out commit 3ce53655a3739dadd732556e1902e7686ef59260 of the TYPO3 core and view the full Typoscript Template in the Analyzer. There is no object tt_content.fluidcontent_content being defined.
5. When using the previous commit 85d88e4f9d0efe4443bace89ce98c585255cacfd, tt_content.fluidcontent_content is defined correctly.