Revert "alloca seems buggy on M4"

This reverts commit 4b1e9d8f92aa948f8ecccf364edcb911a135f2c8.

1 files changed, 1 insertions, 1 deletions

diff --git a/extmod/modure.c b/extmod/modure.c
index 3358b8e21..78de4706d 100644
--- a/extmod/modure.c
+++ b/extmod/modure.c
@@ -144,7 +144,7 @@ STATIC mp_obj_t re_split(size_t n_args, const mp_obj_t *args) {
     }
 
     mp_obj_t retval = mp_obj_new_list(0, NULL);
-    const char* caps[caps_num];
+    const char **caps = alloca(caps_num * sizeof(char*));
     while (true) {
         // cast is a workaround for a bug in msvc: it treats const char** as a const pointer instead of a pointer to pointer to const char
         memset((char**)caps, 0, caps_num * sizeof(char*));