fails:Encoding.compatible? String, Regexp returns US-ASCII if both are US-ASCII
fails:Encoding.compatible? String, Regexp returns the String's Encoding if it is not US-ASCII but both are ASCII only
fails:Encoding.compatible? String, Regexp returns the String's Encoding if the String is not ASCII only
fails:Encoding.compatible? Regexp, String returns US-ASCII if both are US-ASCII
fails:Encoding.compatible? Regexp, Regexp returns US-ASCII if both are US-ASCII
fails:Encoding.compatible? Regexp, Regexp returns the first's Encoding if it is not US-ASCII and not ASCII only
fails:Encoding.compatible? Regexp, Symbol returns US-ASCII if both are US-ASCII
fails:Encoding.compatible? Regexp, Symbol returns the first's Encoding if it is not US-ASCII and not ASCII only
fails:Encoding.compatible? Symbol, Regexp returns US-ASCII if both are US-ASCII
fails:Encoding.compatible? Object, Object returns nil for Object, String
fails:Encoding.compatible? Object, Object returns nil for Object, Regexp
fails:Encoding.compatible? Object, Object returns nil for Object, Symbol
fails:Encoding.compatible? Object, Object returns nil for String, Object
fails:Encoding.compatible? Object, Object returns nil for Regexp, Object
fails:Encoding.compatible? Object, Object returns nil for Symbol, Object
