diff options
Diffstat (limited to 'Modules/mmapmodule.c')
| -rw-r--r-- | Modules/mmapmodule.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/Modules/mmapmodule.c b/Modules/mmapmodule.c index 4b0c1e2..8ff63f5 100644 --- a/Modules/mmapmodule.c +++ b/Modules/mmapmodule.c @@ -351,12 +351,17 @@ mmap_gfind(mmap_object *self, Py_ssize_t res; CHECK_VALID_OR_RELEASE(NULL, view); - if (reverse) { + if (end < start) { + res = -1; + } + else if (reverse) { + assert(0 <= start && start <= end && end <= self->size); res = _PyBytes_ReverseFind( self->data + start, end - start, view.buf, view.len, start); } else { + assert(0 <= start && start <= end && end <= self->size); res = _PyBytes_Find( self->data + start, end - start, view.buf, view.len, start); |