Editor adds number sequence when line contains a 206 (DEFFN) code

[lippmaje]

The editor adds a number sequence (#14 plus 5 more bytes) in front of a comma whenever the source code contains the number 206. It also happens when the line number itself is made up from a 206 (lowbyte). See the sample below. Saving this sample and reloading it causes the unwanted number sequence(s) to reappear.

   5 REM False number bytes after a 206 data field.
   6 REM Does not happen with 205 or other numbers.
  10 DATA 206: REM a,b,c
  20 DATA 205: REM a,b,c
  30 DATA 206: REM a,
  40 DATA 206: REM ,b
  50 DATA 206: DATA "z,x",z,x: REM z,x
  60 DATA 207: DATA "z,","x,","z,x"
8900 REM Also happens if line nr contains 206, like
8901 REM with 8910 which is 34*256 + 206
8909 DATA "z,x"
8910 DATA "z,z,x"
8911 DATA "z,x"
9998 REM The number bytes prefix all commas of that line.
9999 REM If removed, they reappear after reload.

[lippmaje]

Hint: When you add a DEF FN statement to a program, the ZX basic system adds an empty number sequence (#14 plus 5 zeroes) to any parameter in the comma-separated parameter list. See ROM at $1F86. My assumption is that Basinc tries to mimick this behavior but fails to determine if the 206 is indeed a DEFFN or something else.

The issue may be caused by FindDEFFN() / ProcessDEFFN() in BASSupport.pas. I still have no clue how to compile the sources.

[ref-xx]

I could not be able to replicate the issue here (tested in 1.75, 1.78, 1.79).
(btw. please use latest version, 1.77 is outdated)

[lippmaje]

It would be great to be able to submit defects against the latest version. However, the last commit here is from Oct 21 v1.77. Do you update the GitHub project?

[ref-xx]

ok, I finally confirm and understand the problem. as you have perfectly pinpoint, both FindDEFFN() / ProcessDEFFN() was to blame.

[lippmaje]

v1.794

It looks like it happens again. Line 9422 is 36*256+206 and BasinC happily inserts 6 bytes into the DATA statement. Removing the chars and saving does not work because it gets added again as soon as you reload the program.

BAS file:
deffnbug.zip