* rust/compile/bad_as_bool_char.rs:
Updated comment to pass test case.
* rust/compile/cast1.rs: likewise.
* rust/compile/cast4.rs: likewise.
* rust/compile/cast5.rs: likewise.
* rust/compile/all-cast.rs: New test for all error codes.
Signed-off-by: Muhammad Mahad <mahadtxt@gmail.com>