Fix exception on empty argument

rfm · rfm · commit e45aa5c68b23 · 2025-11-13T18:30:32.000Z
diff --git a/Tools/autogsdoc.m b/Tools/autogsdoc.m
@@ -885,7 +885,7 @@ standard PropertyList format (not the XML format of OS X), using
   for (i = 0; i < [argsGiven count]; i++)
     {
       arg = [argsGiven objectAtIndex: i];
-      if ([arg characterAtIndex: 0] == '-')
+      if ([arg length] > 0 && [arg characterAtIndex: 0] == '-')
 	{
 	  opt = ([arg characterAtIndex: 1] == '-')
 	    ? [arg substringFromIndex: 2] : [arg substringFromIndex: 1];

Original file line number	Diff line number	Diff line change
`@@ -885,7 +885,7 @@ standard PropertyList format (not the XML format of OS X), using`
`885`	`885`	`for (i = 0; i < [argsGiven count]; i++)`
`886`	`886`	`{`
`887`	`887`	`arg = [argsGiven objectAtIndex: i];`
`888`		`- if ([arg characterAtIndex: 0] == '-')`
	`888`	`+ if ([arg length] > 0 && [arg characterAtIndex: 0] == '-')`
`889`	`889`	`{`
`890`	`890`	`opt = ([arg characterAtIndex: 1] == '-')`
`891`	`891`	`? [arg substringFromIndex: 2] : [arg substringFromIndex: 1];`