Fix func_decl_0: correctly set interpreter's opcode counter.

src/libcoreint/interpreter.c

@@ -205,3 +205,12 @@ get_number_by_idx(T_IDX idx) /**< literal id */
 
   return num;
 } /* get_number_by_idx */
+
+/**
+ * Get specified opcode from the program.
+ */
+OPCODE
+read_opcode(opcode_counter_t counter) /**< opcode counter */
+{
+  return __program[ counter ];
+} /* read_opcode */

src/libcoreint/interpreter.h

@@ -43,5 +43,7 @@ ecma_completion_value_t run_int_from_pos (opcode_counter_t start_pos,
 ssize_t try_get_string_by_idx( T_IDX idx, ecma_char_t *buffer_p, ssize_t buffer_size);
 ecma_number_t get_number_by_idx(T_IDX idx);
 
+OPCODE read_opcode(opcode_counter_t counter);
+
 #endif	/* INTERPRETER_H */
 

src/libcoreint/opcodes.c

@@ -1338,8 +1338,9 @@ opfunc_func_decl_0(OPCODE opdata, /**< operation data */
   TODO( Iterate vargs );
 
   const opcode_counter_t jmp_down_opcode_idx = (opcode_counter_t) (int_data->pos);
-
+  OPCODE jmp_down_opcode = read_opcode( jmp_down_opcode_idx );
-  TODO( ASSERT( Current opcode is jmp_down ) );
+  JERRY_ASSERT( jmp_down_opcode.op_idx == __op__idx_jmp_down );
+  int_data->pos = (opcode_counter_t) ( jmp_down_opcode_idx + jmp_down_opcode.data.jmp_down.opcode_count );
 
   const opcode_counter_t function_code_opcode_idx = (opcode_counter_t) (jmp_down_opcode_idx + 1);