It's a nitpick.
The place calling strcpy is just one line. It might reduce some bytes to change to memcpy().
diff --git a/src/codegen.c b/src/codegen.c
index daa5211..e032ec5 100644
--- a/src/codegen.c
+++ b/src/codegen.c
@@ -553,7 +553,7 @@ attrsym(codegen_scope *s, mrb_sym a)
name = mrb_sym2name_len(s->mrb, a, &len);
name2 = codegen_palloc(s, len+1);
- strcpy(name2, name);
+ memcpy(name2, name, len);
name2[len] = '=';
name2[len+1] = '\0';
It's a nitpick.
The place calling strcpy is just one line. It might reduce some bytes to change to memcpy().