Initialize conn->Pfdebug to NULL when creating a connection
Failing to do this can cause a crash, and I suspect is what has happened
with a buildfarm member reporting mysterious failures.
This is an ancient bug, but I'm not backpatching since evidently nobody
cares about PQtrace in older releases.
Discussion:
@@ -3952,6 +3952,7 @@ makeEmptyPGconn(void)
conn->verbosity = PQERRORS_DEFAULT;
conn->show_context = PQSHOW_CONTEXT_ERRORS;
conn->sock = PGINVALID_SOCKET;
+ conn->Pfdebug = NULL;
/*
* We try to send at least 8K at a time, which is the usual size of pipe
