Iterative evaluation executes old versions of the code

[ctrueden]

It seems that old versions of Java code get executed, in a sort of strange pattern.

Here is my recipe to demonstrate. Unexpected behavior is noted with bold bangs (!!!).

1. Launch ImageJ
2. Open the Script Editor ([)
3. Templates > Java > Bare Plugin
4. Save to Desktop
5. Add import ij.IJ; at line 2
6. Insert IJ.showMessage("Hello world!"); at line 18
7. Save then Run, and note that "Hello world!" is shown
8. Change world to there
9. Save then Run, and note that "Hello there!" is shown
10. Change there to my friend
11. Save then Run, and note that "Hello world!" is shown again (!!!)
12. Run again (without further changes), and note that "Hello there!" is now shown (!!!)
13. Run a third time (again, no changes), and note that it is back to "Hello world!" again (!!!)

It seems to alternate between the first and second iterations of the class. At no point are the third or later iterations of the code executed.

[ctrueden]

I can no longer reproduce this problem using an up-to-date Java-8 version of Fiji. Presuming fixed. Please reopen if you are able to reproduce.