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Issue #15381: Try to fix refcount bug. Empty and 1-byte buffers are always shared.

This commit is contained in:
Serhiy Storchaka 2015-02-03 14:57:49 +02:00
parent ab53ab0a84
commit b9765eec5c
1 changed files with 3 additions and 1 deletions
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4
Modules/_io/bytesio.c
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@ -38,7 +38,8 @@ typedef struct {
return NULL; \
}
#define SHARED_BUF(self) (Py_REFCNT((self)->buf) > 1)
#define SHARED_BUF(self) (Py_REFCNT((self)->buf) > 1 || \
PyBytes_GET_SIZE((self)->buf) <= 1)
/* Internal routine to get a line from the buffer of a BytesIO
@ -308,6 +309,7 @@ read_bytes(bytesio *self, Py_ssize_t size)
char *output;
assert(self->buf != NULL);
assert(size <= self->string_size);
if (size > 1 &&
self->pos == 0 && size == PyBytes_GET_SIZE(self->buf) &&
self->exports == 0) {