diff options
| -rw-r--r-- | Modules/_io/fileio.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/Modules/_io/fileio.c b/Modules/_io/fileio.c index d5bf328..5d9d87d 100644 --- a/Modules/_io/fileio.c +++ b/Modules/_io/fileio.c @@ -1094,6 +1094,12 @@ _io_FileIO_truncate_impl(fileio *self, PyTypeObject *cls, PyObject *posobj) return NULL; } + /* Sometimes a large file is truncated. While estimated_size is used as a + estimate, that it is much larger than the actual size can result in a + significant over allocation and sometimes a MemoryError / running out of + memory. */ + self->estimated_size = pos; + return posobj; } #endif /* HAVE_FTRUNCATE */ |