extensibility fix, at least
diff --git a/tests/126-per-extensions-OK.asn1 b/tests/126-per-extensions-OK.asn1
new file mode 100644
index 0000000..c4729d3
--- /dev/null
+++ b/tests/126-per-extensions-OK.asn1
@@ -0,0 +1,20 @@
+
+-- OK: Everything is fine
+
+-- iso.org.dod.internet.private.enterprise (1.3.6.1.4.1)
+-- .spelio.software.asn1c.test (9363.1.5.1)
+-- .126
+
+ModulePERExtensions
+ { iso org(3) dod(6) internet (1) private(4) enterprise(1)
+ spelio(9363) software(1) asn1c(5) test(1) 126 }
+ DEFINITIONS AUTOMATIC TAGS ::=
+BEGIN
+
+ PDU ::= SEQUENCE {
+ ...,
+ str-o IA5String OPTIONAL,
+ str-m IA5String
+ }
+
+END
diff --git a/tests/126-per-extensions-OK.asn1.-Pgen-PER b/tests/126-per-extensions-OK.asn1.-Pgen-PER
new file mode 100644
index 0000000..8517c02
--- /dev/null
+++ b/tests/126-per-extensions-OK.asn1.-Pgen-PER
@@ -0,0 +1,89 @@
+
+/*** <<< INCLUDES [PDU] >>> ***/
+
+#include <IA5String.h>
+#include <constr_SEQUENCE.h>
+
+/*** <<< TYPE-DECLS [PDU] >>> ***/
+
+typedef struct PDU {
+ /*
+ * This type is extensible,
+ * possible extensions are below.
+ */
+ IA5String_t *str_o /* OPTIONAL */;
+ IA5String_t *str_m;
+
+ /* Context for parsing across buffer boundaries */
+ asn_struct_ctx_t _asn_ctx;
+} PDU_t;
+
+/*** <<< FUNC-DECLS [PDU] >>> ***/
+
+extern asn_TYPE_descriptor_t asn_DEF_PDU;
+
+/*** <<< STAT-DEFS [PDU] >>> ***/
+
+static asn_TYPE_member_t asn_MBR_PDU_1[] = {
+ { ATF_POINTER, 2, offsetof(struct PDU, str_o),
+ .tag = (ASN_TAG_CLASS_CONTEXT | (0 << 2)),
+ .tag_mode = -1, /* IMPLICIT tag at current level */
+ .type = &asn_DEF_IA5String,
+ .memb_constraints = 0, /* Defer constraints checking to the member type */
+ .per_constraints = 0, /* No PER visible constraints */
+ .default_value = 0,
+ .name = "str-o"
+ },
+ { ATF_POINTER, 1, offsetof(struct PDU, str_m),
+ .tag = (ASN_TAG_CLASS_CONTEXT | (1 << 2)),
+ .tag_mode = -1, /* IMPLICIT tag at current level */
+ .type = &asn_DEF_IA5String,
+ .memb_constraints = 0, /* Defer constraints checking to the member type */
+ .per_constraints = 0, /* No PER visible constraints */
+ .default_value = 0,
+ .name = "str-m"
+ },
+};
+static int asn_MAP_PDU_oms_1[] = { 0, 1 };
+static ber_tlv_tag_t asn_DEF_PDU_tags_1[] = {
+ (ASN_TAG_CLASS_UNIVERSAL | (16 << 2))
+};
+static asn_TYPE_tag2member_t asn_MAP_PDU_tag2el_1[] = {
+ { (ASN_TAG_CLASS_CONTEXT | (0 << 2)), 0, 0, 0 }, /* str-o at 16 */
+ { (ASN_TAG_CLASS_CONTEXT | (1 << 2)), 1, 0, 0 } /* str-m at 17 */
+};
+static asn_SEQUENCE_specifics_t asn_SPC_PDU_specs_1 = {
+ sizeof(struct PDU),
+ offsetof(struct PDU, _asn_ctx),
+ asn_MAP_PDU_tag2el_1,
+ 2, /* Count of tags in the map */
+ asn_MAP_PDU_oms_1, /* Optional members */
+ 0, 2, /* Root/Additions */
+ -1, /* Start extensions */
+ 3 /* Stop extensions */
+};
+asn_TYPE_descriptor_t asn_DEF_PDU = {
+ "PDU",
+ "PDU",
+ SEQUENCE_free,
+ SEQUENCE_print,
+ SEQUENCE_constraint,
+ SEQUENCE_decode_ber,
+ SEQUENCE_encode_der,
+ SEQUENCE_decode_xer,
+ SEQUENCE_encode_xer,
+ SEQUENCE_decode_uper,
+ SEQUENCE_encode_uper,
+ 0, /* Use generic outmost tag fetcher */
+ asn_DEF_PDU_tags_1,
+ sizeof(asn_DEF_PDU_tags_1)
+ /sizeof(asn_DEF_PDU_tags_1[0]), /* 1 */
+ asn_DEF_PDU_tags_1, /* Same as above */
+ sizeof(asn_DEF_PDU_tags_1)
+ /sizeof(asn_DEF_PDU_tags_1[0]), /* 1 */
+ 0, /* No PER visible constraints */
+ asn_MBR_PDU_1,
+ 2, /* Elements count */
+ &asn_SPC_PDU_specs_1 /* Additional specs */
+};
+