[DrJava] [ drjava-Bugs-2612917 ] Corrupt ASCII text can be pasted into Definitions pane

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Bugs item #2612917, was opened at 2009-02-18 15:03
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Category: Definitions (source editor)
Group: None
Status: Open
Resolution: None
Priority: 7
Private: No
Submitted By: Robert Cartwright (rcartwright)
Assigned to: Nobody/Anonymous (nobody)
Summary: Corrupt ASCII text can be pasted into Definitions pane

Initial Comment:
I created a trvial Elementary level program (.dj0) by copying text for a class from a Powerpoint slide.  That text contained a hidden ^K.  When I compiled the code, the Elementary language level erroneously reports:

Error: This cannot appear in a method declaration! that 

Since the code did not contain any errors other than the hidden ^K, I initially interpreted "This" as referring to the keyword "this" which puzzled me because "this" did not appear in my trivial program.

I now realized that "This" refers to the hidden ^K character.  This behavior reveals two bugs:
(i) the fact that pasting can corrupt the invariants DrJava maintains on definitions pane text (the attached program does not even indent properly because of the embedded, hidden ^K character.
(ii) error reporting in the Language Levels compiler for unrecognized text is so weak that it doesn't even say what the text is.

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You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=438935&aid=2612917&group_id=44253