gst-convert fails with "Invalid index 1: index out of range" when trying to convert methods have a '*' in their category to squeak. The reason is that since b44ebba00d36fe7a3d112811f4617f5630ee55f4 escapeRegex is called on the methodCategory.

As 'escapeRegex' should simply put backslashes in Front of regex characters, why not use a simple

 String>>escapeRegex [
    ^ '[][?*+\\()^$|]' 
       inject: self 
       into: [:str :char | 
          str 
             copyReplaceAll: char asString 
             with: '\', char asString].
 ]

instead of the call to "copyFrom:to:replacingAllRegex:with:"? Wouldn't that solve the problem?