Expected Behavior

When building a library containing components there should be component-preloads for each component included in the library-preload.

Current Behavior

When building the library a library-preload is generated including the content of the included components.
When interpreting the library-preload n Error occures (See log section).

Subsequent to this error at runtime of the consuming application the framework tries to get the component's-preload. As this fails the framework is requesting the single source files (as it would be without a build).

Steps to reproduce the issue

1. Build a library with webIDE Template including Components for reuse
   Good description at Nabi's blog:
   https://www.nabisoft.com/tutorials/sapui5/implementing-re-use-components-in-sapui5-libraries-and-consuming-them-in-sapui5-apps
2. Build it
3. Consume it (also described step by step in the blog)

At the moment I only have a example for this in our company namespace which I am not allowed to share. In case this would be necessary I could build a example on github for this.

Context

• OS/Platform: SAP Web IDE Full-Stack - Version: 181025
• Node.js Version: {...}
• npm Version: {...}
• Browser (if relevant): {...}
• Other information: Tested on SAPUI5 1.52.16 on a SAP Netweaver 7.50 with SAP_UI 7.52

Affected components

• ui5-builder
• ui5-server
• ui5-cli
• ui5-fs
• ui5-project
• ui5-logger

Stack trace/log output

When starting consuming application I encounter a error with the generated library preload:

"Uncaught TypeError: sap.ui.require.preload is not a function
    at library-preload.js:1"

Find the generated Library-Preload here:

[library_preload.txt](https://github.com/SAP/ui5-tooling/files/2525282/library_preload.txt)

Consuming Application requests component-preload for Compnent WorkcenterInput from:

/sap/bc/ui5_ui5/<customernamespace>/<libraryname>/<cachebustertoken>/components/WorkcenterInput/Component-preload.js

@bendkt : Marker for you as we discussed this topic at TechEd. In case of analysis by official SAP I could provide our applications directly. If necessary I can create a public version.