Tomcat source code is precisely correct version but Bytecode still does not match

[Akito Kitsune]

I am trying to debug an application using JAAS authentication. Because this framework is so extremely mulish, I need to debug what the Tomcat is doing internally when trying to use JAAS.

The Tomcat I am trying to debug is of the version `9.0.14.0` and was built on `Dec 6 2018 21:13:53 UTC`.

The source code of the Tomcat I am using for debugging is finalised at the following commit:

```
commit 90583be4f77c92d8e8ac4a48e63b3cdc31e45890 (HEAD, tag: 9.0.14)
Author: Mark Thomas <[e-mail]>
Date:   Thu Dec 6 21:09:34 2018 +0000

   Tag 9.0.14
   
   git-svn-id: https://svn.apache.org/repos/asf/tomcat/tags/TOMCAT_9_0_14@1848363 13f79535-47bb-0310-9956-ffa450edef68
```

Committed 4 minutes, before it was built. It's literally the same server version. It must be the same source code, as used for the server.

However, when I use IntelliJ to debug the Tomcat, then I get crossed out breakpoints. I almost nowhere can put breakpoints, because they are greyed & crossed out. Sometimes a message appears, telling me that the source code does not match the Bytecode.

How does it not match? Why can I not debug the Tomcat server?

[Akito Kitsune]

Turns out, I had to explicitly mark the sources in the IDE, so it wouldn't pick some self-selected ones. Now, it seems to pick the right sources and the debugging process works, as expected.