Fix null assert check in codemeta

libr/anal/codemeta.c

@@ -1,4 +1,4 @@
-/* radare2 - LGPL - Copyright 2020-2023 - nimmumanoj, pancake */
+/* radare2 - LGPL - Copyright 2020-2024 - nimmumanoj, pancake */
 
 #include <r_core.h>
 #include <r_codemeta.h>
@@ -42,7 +42,9 @@ R_API RCodeMeta *r_codemeta_clone(RCodeMeta *code) {
 }
 
 R_API RCodeMeta *r_codemeta_new(const char *code) {
+#if R2_600
 	R_RETURN_VAL_IF_FAIL (code, NULL);
+#endif
 	RCodeMeta *r = R_NEW0 (RCodeMeta);
 	if (r) {
 		r->tree = r_crbtree_new (NULL);

test/db/cmd/cmd_interpret

@@ -8,6 +8,17 @@ EXPECT=<<EOF
 EOF
 RUN
 
+NAME=interpret dollar file
+FILE=-
+CMDS=<<EOF
+?e ?e hello > $cmd
+. $cmd
+EOF
+EXPECT=<<EOF
+hello
+EOF
+RUN
+
 NAME=.?e ?e
 FILE=--
 CMDS=<<EOF