Formatter deletes a newline after content assist invocation

[trancexpress]

This has been occurring for a while now, but I've not been able to record it. Every time it occurs, when I retry the same steps, its not reproducible.

I don't have clear reproduction steps, but it seems to occur e.g. when I start Eclipse in my workspace and edit: org.eclipse.e4.ui.tests.workbench.PartOnTopManagerTest.test_PlaceholderOnTopStackSwitch()

I'm writing if (System.getenv, invoking content assist and an unexpected newline appears. See screen recording:

formatter_inserts_newline.mp4

The screen recording is missing the content assist pop-up with options for System.getenv() and System.getenv(String), I'm selecting the 2nd option (with the String argument). I'm only using the keyboard here, no mouse.

[trancexpress]

I'm not sure if its the formatter or the content assist invocation doing the deletion, but it looks like formatting...

[jjohnstn]

What are your formatting settings? I am unable to reproduce it on a simple project with default settings and it is only spurious for you. Does it only occur just after you start Eclipse? If that is the case, perhaps the issue occurs due to some start-up task that isn't completed yet.