[squeak-dev] [5.2a] styled text in a class comment spawns endless subscript out-of-bounds

K K Subbu kksubbu.ml at gmail.com
Tue Jul 3 10:15:49 UTC 2018

On Tuesday 03 July 2018 04:40 AM, Tim Johnson wrote:
> ByteString(Object)>>error:
> ByteString(Object)>>errorSubscriptBounds:
> ByteString(Object)>>at:
> ByteString>>at:
> CharacterBlockScanner(CharacterScanner)>>basicScanByteCharactersFrom:to:in:rightX: 

The following code in basicScan... doesn't look right:
	lastIndex := startIndex.
	[lastIndex <= stopIndex]
		whileTrue: [
			"get the character value"
			char := sourceString at: lastIndex.
stopIndex can exceed sourceString size, so the comparison should be < 
and not <=. This may trigger an error when sourceString ends in styled text.

With the attached patch, I no longer get the error. But I am not sure if 
my diagnosis is right.

HTH .. Subbu
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