From e73eaf2d055707d5ecc0285f6375b41a451c109a Mon Sep 17 00:00:00 2001
From: Matthew Honnibal <honnibal@gmail.com>
Date: Fri, 8 May 2015 16:52:17 +0200
Subject: [PATCH] * Replace some assertions with proper errors

---
 spacy/vocab.pyx | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/spacy/vocab.pyx b/spacy/vocab.pyx
index feb609c0e..188fe7069 100644
--- a/spacy/vocab.pyx
+++ b/spacy/vocab.pyx
@@ -144,7 +144,8 @@ cdef class Vocab:
             raise IOError('LexemeCs file not found at %s' % loc)
         cdef bytes bytes_loc = loc.encode('utf8') if type(loc) == unicode else loc
         cdef FILE* fp = fopen(<char*>bytes_loc, b'rb')
-        assert fp != NULL
+        if fp == NULL:
+            raise IOError('lexemes data file present, but cannot open from ' % loc)
         cdef size_t st
         cdef LexemeC* lexeme
         cdef attr_t orth
@@ -161,7 +162,9 @@ cdef class Vocab:
             lexeme.repvec = EMPTY_VEC
             if st != 1:
                 break
-            assert orth == lexeme.orth
+            if orth != lexeme.orth:
+                # TODO: Improve this error message, pending resolution to Issue #64
+                raise IOError('Error reading from lexemes.bin. Integrity check fails.')
             py_str = self.strings[orth]
             key = hash_string(py_str)
             self._map.set(key, lexeme)