fix exit 3 when an error machine is generated
lhs_id/anonymous is not an error
id_expr/last : error
atom/contraint : error
tempo_expr/pre : error
tempo_expr/arrow : error
tempo_expr/times : error
tempo_expr/when : error
tempo_expr/merge : error
switch_expr/case : error
array_expr/dyn_proj : error
struct_expr/access : error
label_expr : error
mixed_constructor : error
fix clock & probe
tests for {map,fold}w{,i}
iterator/*/error
/operator/activate/*
operator/restart : error