bytes objects are by their definition immutable and read only. but when
passing one to a buffer api that tries to use the PyBUF_LOCK flag it raises
BufferError "Cannot lock this object." from PyBuffer_FillInfo in
Objects/abstract.c as called by Objects/bytesobject.c's bytes_getbuffer
method.
I think the problem is a >= 0 where a != 0 was intended in
PyBuffer_FillInfo:
--- Objects/abstract.c (revision 61375)
+++ Objects/abstract.c (working copy)
@@ -673,7 +673,7 @@
{
if (view == NULL) return 0;
if (((flags & PyBUF_LOCK) == PyBUF_LOCK) &&
- readonly >= 0) {
+ readonly != 0) {
PyErr_SetString(PyExc_BufferError,
"Cannot lock this object.");
return -1;
All tests pass for me with this patch applied.
-gps
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