Invocation() of a macro created via \let references original macro

[tkw1536]

Assume we are defining a macro then copy it via a \let into a second macro with something like

\def\dummymacro{}
\let\othermacro\dummymacro

If we now want to now have tokens representing the invocation of this macro, we should then be able to use

Invocation('\othermacro');

which we would expect to return a single T_CS('\othermacro'). When running this code however, we get T_CS('\dummymacro') instead.

This comes from a more complicated scenario I encountered while updating keyval bindings, but I have gotten it down to this very basic example. This caused an infinite loop, making debugging very hard.

[brucemiller]

This should be fixed now; thanks for the report!