diff options
Diffstat (limited to 'Modules/_io/bufferedio.c')
| -rw-r--r-- | Modules/_io/bufferedio.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/Modules/_io/bufferedio.c b/Modules/_io/bufferedio.c index 5816a93432..144aea20d8 100644 --- a/Modules/_io/bufferedio.c +++ b/Modules/_io/bufferedio.c @@ -1810,7 +1810,7 @@ bufferedwriter_write(buffered *self, PyObject *args) avail = Py_SAFE_DOWNCAST(self->buffer_size - self->pos, Py_off_t, Py_ssize_t); if (buf.len <= avail) { memcpy(self->buffer + self->pos, buf.buf, buf.len); - if (!VALID_WRITE_BUFFER(self)) { + if (!VALID_WRITE_BUFFER(self) || self->write_pos > self->pos) { self->write_pos = self->pos; } ADJUST_POSITION(self, self->pos + buf.len); |