Joseph Ferano
86d0c14a45
An index expression inside a place, a place under addr, and a restart-case clause body are each the only route to a function in reach-walk.flan. Drop any one of the three from the walk and the function is not emitted, so the program stops linking rather than answering wrong; each mutation was planted and watched fail here. The addr case goes through a deref place on purpose, so the index case cannot stand in for it.
