Debugger hooks can be used to implement a COMEFROM statement, as in the humorous Python goto module;[1] see below.
It was elaborated upon in a Datamation article by R. Lawrence Clark in 1973,[2] written in response to Edsger Dijkstra's letter Go To Statement Considered Harmful.
On 1 April 2004, Richie Hindle published an implementation of both GOTO and COMEFROM for the Python programming language.
[1] Despite being released on April Fools' Day and not being intended for serious use, the syntax is valid and the implementation fully works.
A fully runnable example in Python with the joke goto module installed (which uses debugger hooks to control program execution) looks like this: This is an implementation in Ruby of the Intercal COME FROM statement.