[Pharo-project] Debugger problem with pragmas

I don't know if it's only me, but I sometimes can't open the debugger... I've got a problem with this code (eem): MethodProperties>>analogousCodeTo: aMethodProperties pragmas ifNil: [aMethodProperties pragmas notEmpty ifTrue: [^false]] ifNotNil: [aMethodProperties pragmas empty ifTrue: [^false]. snip... What is this #empty message? Shouldn't it be isEmpty or ifEmpty: [] ? If I correct it, I have further problems because #analogousCodeTo: is not implemented in Pragma Nicolas