tree 8af03bbe09cb17c238909afe5971766ad5854778
parent 8ea36fc9f314e9de921044883457085b57c16045
author Tom Tromey <tom@tromey.com> 1755971208 -0600
committer Tom Tromey <tom@tromey.com> 1757463872 -0600

Make type_stack popping a bit safer

This changes type_stack so that an element that has an argument can't
be popped in isolation.  The idea is to make type stack use a little
safer, making it so that the stack can't end up in an invalid state.

This also fixes up a few related comments.

Approved-By: Simon Marchi <simon.marchi@efficios.com>