diff --git a/bindings/README.md b/bindings/README.md
index da01865a3..a2faea44d 100644
--- a/bindings/README.md
+++ b/bindings/README.md
@@ -40,8 +40,12 @@ The `zencode-data-keys-conf` is a file or stream with a newline separated list o
 2. zencode script (string -> base64) *newline*
 3. keys (json -> base64) *newline*
 4. data (json -> base64) *newline*
+5. extra (json -> base64) *newline*
+6. context (json -> base64) *newline*
 
-Each line should start directly with the base64 string without any prefix and should end with a newline. Anything else will likely be rejected.
+Each line should start directly with the base64 string without any prefix and should end with a newline.
+
+Empty lines can be a newline (or CRLF) and will be skipped, but should never be omitted: the zencode-exec expects 6 input lines in total, not less, including empty ones, all newline terminated. 
 
 This executes and returns two streams:
 1. `stdout` with the `json` formatted results of the execution
diff --git a/src/zen_parse.c b/src/zen_parse.c
index 91e2aee44..281bdbafe 100644
--- a/src/zen_parse.c
+++ b/src/zen_parse.c
@@ -191,6 +191,11 @@ static int lua_unserialize_json(lua_State* L) {
 	return 0;
 }
 
+// removed because of unexplained segfault when used inside pcall to
+// parse zencode: set_rule and set_scenario will explode, also seems
+// to perform worse than pure Lua (see PR #709)
+
+#if 0
 char* strtok_single(char* str, char const* delims)
 {
     static char* src = NULL;
@@ -249,6 +254,7 @@ static int lua_strtok(lua_State* L) {
 	}
 	return 1;
 }
+#endif
 
 void zen_add_parse(lua_State *L) {
 	// override print() and io.write()
@@ -258,7 +264,6 @@ void zen_add_parse(lua_State *L) {
 		  {"trim", lua_trim_spaces},
 		  {"trimq", lua_trim_quotes},
 		  {"jsontok", lua_unserialize_json},
-//		  {"strtok", lua_strtok},
 		  {NULL, NULL} };
 	lua_getglobal(L, "_G");
 	luaL_setfuncs(L, custom_parser, 0);  // for Lua versions 5.2 or greater
diff --git a/test/zencode/zencode_exec.bats b/test/zencode/zencode_exec.bats
index 0c3c44926..c62b00e53 100644
--- a/test/zencode/zencode_exec.bats
+++ b/test/zencode/zencode_exec.bats
@@ -14,12 +14,11 @@ EOF
     echo >> zencode_exec_stdin # data
     echo >> zencode_exec_stdin # extra
     echo >> zencode_exec_stdin # context
-    echo >> zencode_exec_stdin
 
 	cat zencode_exec_stdin | ${TR}/zencode-exec > $TMP/out
     save_output empty.json
 }
-@test "Execute zencode-exec with all stdin inputs" {
+@test "Execute zencode-exec with keys and data stdin inputs" {
 
 	# empty conf
 	echo > zencode_exec_stdin
@@ -120,3 +119,79 @@ EOF
 	save_output trace.json
 	assert_output '["Given nothing","When I create the random object of '"'"'256'"'"' bits","and debug"]'
 }
+
+@test "Execute zencode-exec with all stdin inputs including extra" {
+
+	# empty conf
+	echo > zencode_exec_stdin
+
+    # zencode
+	cat <<EOF | base64 -w0 >> zencode_exec_stdin
+rule check version 3.0.0
+Scenario 'ecdh': Bob verifies the signature from Alice
+# Here we load the pubkey we'll verify the signature against
+Given I have a 'public key' from 'Alice'
+# Here we load the objects to be verified
+Given I have a 'string' named 'myMessage'
+Given I have a 'string array' named 'myStringArray'
+
+# Here we load the objects's signatures
+Given I have a 'signature' named 'myStringArray.signature'
+Given I have a 'signature' named 'myMessage.signature'
+
+# Here we perform the verifications
+When I verify the 'myMessage' has a ecdh signature in 'myMessage.signature' by 'Alice'
+When I verify the 'myStringArray' has a ecdh signature in 'myStringArray.signature' by 'Alice'
+
+# Here we print out the result: if the verifications succeeded, a string will be printed out
+# if the verifications failed, Zenroom will throw an error
+Then print the string 'Zenroom certifies that signatures are all correct!'
+Then print the 'myMessage'
+
+EOF
+	echo >> zencode_exec_stdin
+
+    # keys
+	cat <<EOF | base64 -w0 >> zencode_exec_stdin
+{
+	"Alice": {
+		"public_key": "BBCQg21VcjsmfTmNsg+I+8m1Cm0neaYONTqRnXUjsJLPa8075IYH+a9w2wRO7rFM1cKmv19Igd7ntDZcUvLq3xI="
+	}
+}
+EOF
+	echo >> zencode_exec_stdin
+
+    # data
+	cat <<EOF | base64 -w0 >> zencode_exec_stdin
+{
+	"myMessage": "Dear Bob, your name is too short, goodbye - Alice.",
+	"myMessage.signature": {
+		"r": "vWerszPubruWexUib69c7IU8Dxy1iisUmMGC7h7arDw=",
+		"s": "nSjxT+JAP56HMRJjrLwwB6kP+mluYySeZcG8JPBGcpY="
+	}
+}
+EOF
+
+    # extra
+cat <<EOF | base64 -w0 >> zencode_exec_stdin
+{
+	"myStringArray": [
+		"Hello World! This is my string array, element [0]",
+		"Hello World! This is my string array, element [1]",
+		"Hello World! This is my string array, element [2]"
+	],
+	"myStringArray.signature": {
+		"r": "B8qrQqYSWaTf5Q16mBCjY1tfsD4Cf6ZSMJTHCCV8Chg=",
+		"s": "S1/Syca6+XozVr5P9fQ6/AkQ+fJTMfwc063sbKmZ5B4="
+	}
+}
+EOF
+    echo >> zencode_exec_stdin
+
+    # empty context
+    echo >> zencode_exec_stdin
+
+	cat zencode_exec_stdin | ${TR}/zencode-exec > $TMP/out
+	save_output verified.json
+	assert_output '{"myMessage":"Dear Bob, your name is too short, goodbye - Alice.","output":["Zenroom_certifies_that_signatures_are_all_correct!"]}'
+}