I think also the compiler should add a check for illegal characters and report 
it as such. 

Bob


On Sep 19, 2011, at 9:10 AM, Richard Gaskin wrote:

> Good find.
> 
> If the recipe is consistently reproducible it should be easy and very 
> convenient for scripters to add the presence linefeed chars to the 
> circumstances that will trigger a compilation error.
> 
> Have you submitted a request for that?
> 
> --
> Richard Gaskin
> Fourth World
> LiveCode training and consulting: http://www.fourthworld.com
> Webzine for LiveCode developers: http://www.LiveCodeJournal.com
> LiveCode Journal blog: http://LiveCodejournal.com/blog.irv
> 
> Colin Holgate wrote:
>> A card script that I had made using 4.6.1 was causing a script error in a 
>> button when used in 4.6.4. The button script had no problem, but it did call 
>> into an unrelated handler in the same card script where the problem line was.
>> 
>> It turned out that one line in that card script had an invisible line feed 
>> character in it. The way line feeds is handled changed in 4.6.3, and whereas 
>> before scripts could have such line feed characters in them without a 
>> problem, now they can't.
>> 
>> There was a clue to where the problem was, in that on opening the stack 
>> there was a script error that showed for the line after the one that was the 
>> real problem. The line it claimed was wrong had no problems, but because of 
>> the line feed character the error was really referring to the second half of 
>> the line before the one that was referring to.
>> 
>> Aside from using a bit of abstract thinking to figure it all out, one clue 
>> to there being a rogue line feed character is that if you comment out the 
>> script, the letters after where the line feed is located don't turn green. 
>> If that happens, selecting the line and retyping exactly what you see will 
>> fix it.
>> 
>> So, if you have a stack that worked fine with 4.6.2, but shows problems in 
>> 4.6.3 or later, and the line that it's complaining about seems perfectly 
>> good, comment out the line before that one, and see if the text all turns 
>> green. If it doesn't, retype the line.
>> 
>> I suspect the line feed got in there in the first place by me copying and 
>> pasting an example line of code from the documentation. Not the Help 
>> perhaps, but the earlier iPhone docs.
> 
> 
> 
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