expander: tree-bind: fix incorrect param env.

* eval.c (do_expand): A wrong thing is being done here:
the macro is extended using the original parameter
syntax, that has not been processed by expand_params.
The body is then expanded using that environment.
This subtly breaks support for parameter macros in tree-bind.
They work, but there are spurious warnings about undefined
variables during expansion, and the wrong scope handling
can introduce bugs. The right thing is to derive new_menv
by pulling the parameter symbols from params_ex.

0 files changed, 0 insertions, 0 deletions