Point at utop-full

[emillon]

A common support request for utop is that when using parts compiler-libs, the following error happens:

utop # #require "compiler-libs.common";;
utop # Location.report_warning;;
Line 1:
Error: Reference to undefined global `Location'

This is because the toplevel is expunged, and the correct fix is to use utop-full:

utop # #require "compiler-libs.common";;
utop # Location.report_warning;;
- : Warnings.loc -> Warnings.t -> Location.report option = <fun>

utop itself should hint at this, for example by displaying a warning at #require time or by installing an exception handler.