Delphi: why breakpoints from time to time are not usable (green highlighted line on IDE)?

Question

From time to time I lose breakpoint functionality in Delphi.

I thought this to be a Delphi 2009 issue but now I have also it in Delphi XE.

In Delphi 2009 by

Answer 1

Here's one more reason to misaligned code vs breakpoint markers (blue/red "pill" in the gutter).

The editor recognices three different line endings,

• CRLF (Carriage Return - Line Feed pair)
• CR only
• LF only

Of these, CRLF is the default in the editor.

The compiler however, doesn't seem to consider CR only as a line ending, only CRLF and LF only. Thus if your source file happens to have one or more CR only, the "blue pills" will be offset from the source.

You might have got source files with CR only EOL (end of line) character from e.g. the internet. I recall MAC OS used CR only as EOL.

To verify the EOL's in your file, you can turn on the displaying of EOL's in the editor

( Tools - Options - Editor options - Source options - Show line breaks).

The symbols look weird (see images below), but are just C on top of L for CRLF, C on top of R for CR and L on top of F for LF.

The following images show the normal EOL's (CRLF) and the EOLS's after I forced CR only for one line and LF only for another line in a hex editor. As said above, it is the CR only that offsets the break point markers from the source code.

Normal CRLF EOL's:

One line with CR only and one with LF only:

Fix
To reset all EOL's to CRLF, untick Preserve line ends in Editor Options

( Tools - Options - Editor options),

make a trivial change, so that the file is marked as modified, close the file, save changes to XYZ.pas? YES, and reopen.
Now all line endings are CRLF. Rebuilt the project and all the breakpoint balls will be in the correct locations.