py: Free non-interned strings in the parser when not needed.

mp_parse_node_free now frees the memory associated with non-interned
strings.  And the parser calls mp_parse_node_free when discarding a
non-used node (such as a doc string).

Also, the compiler now frees the parse tree explicitly just before it
exits (as opposed to relying on the caller to do this).

Addresses issue #708 as best we can.

1 files changed, 0 insertions, 1 deletions

diff --git a/bare-arm/main.c b/bare-arm/main.c
index 286e41cd4..983810c89 100644
--- a/bare-arm/main.c
+++ b/bare-arm/main.c
@@ -35,7 +35,6 @@ void do_str(const char *src) {
     qstr source_name = mp_lexer_source_name(lex);
     mp_lexer_free(lex);
     mp_obj_t module_fun = mp_compile(pn, source_name, MP_EMIT_OPT_NONE, true);
-    mp_parse_node_free(pn);
 
     if (module_fun == mp_const_none) {
         // compile error