Joseph Ferano
404c810958
The `inspect' verb had no coverage. The discriminating case is not a path step, it is the frame: dev-inspect.flan gives `mark' to a global holding 99 and to a local of the OUTER frame holding a Point, so evaluating the name and rooting at the frame answer differently and not even with the same type. One `eval-expr' and one `inspect' of that name is the bug and the fix in a pair. The slot index comes off the locals listing's fourth element rather than being written as a literal, which exercises the field the editor depends on and keeps the test from passing for the wrong reason if slot allocation shifts. The rest is what a path can and cannot do: a struct field, an array element, an option's payload and a union case's field — the last two having offsets but no accessor form in the language — and four refusals, each checked for naming the step and saying why. A `:path' of `nil' is read as the slot itself, because Emacs has no other spelling for an empty list. Two claims about the frame, since `stopped_frame' being shared is an assertion about code rather than about behaviour until something proves it: the frame whose body was redefined under it is refused, and so is the whole stack once the program resumes.
