This closes patch:
[ 960406 ] unblock signals in threads
although the changes do not correspond exactly to any patch attached to
that report.
Non-main threads no longer have all signals masked.
A different interface to readline is used.
The handling of signals inside calls to PyOS_Readline is now rather
different.
These changes are all a bit scary! Review and cross-platform testing
much appreciated.
diff --git a/Python/pythonrun.c b/Python/pythonrun.c
index 113ff2d..d89e5e9 100644
--- a/Python/pythonrun.c
+++ b/Python/pythonrun.c
@@ -1435,7 +1435,8 @@
msg = "EOL while scanning single-quoted string";
break;
case E_INTR:
- PyErr_SetNone(PyExc_KeyboardInterrupt);
+ if (!PyErr_Occurred())
+ PyErr_SetNone(PyExc_KeyboardInterrupt);
Py_XDECREF(v);
return;
case E_NOMEM: