From 5555f147dfb23d76bab4fcb688a5a254bc487a63 Mon Sep 17 00:00:00 2001
From: Jim Mussared <jim.mussared@gmail.com>
Date: Wed, 18 Aug 2021 11:51:10 +1000
Subject: [PATCH] py/lexer: Clear fstring_args vstr on lexer free.

This was missed in 692d36d779192f32371f7f9daa845b566f26968d.  It's not
strictly necessary as the GC will clean it anyway, but it's good to
pre-emptively gc_free() all the blocks used in lexing/parsing.

Signed-off-by: Jim Mussared <jim.mussared@gmail.com>
---
 py/lexer.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/py/lexer.c b/py/lexer.c
index ba118c9d2f..69c7d14a77 100644
--- a/py/lexer.c
+++ b/py/lexer.c
@@ -878,6 +878,9 @@ void mp_lexer_free(mp_lexer_t *lex) {
     if (lex) {
         lex->reader.close(lex->reader.data);
         vstr_clear(&lex->vstr);
+        #if MICROPY_PY_FSTRINGS
+        vstr_clear(&lex->fstring_args);
+        #endif
         m_del(uint16_t, lex->indent_level, lex->alloc_indent_level);
         m_del_obj(mp_lexer_t, lex);
     }