I have been troubled by a segmentation fault when reloading from

a dumpall.  This has been happening when a second \connect is
encountered.

The faulty code was in fe-connect.c, where the memory for the user
password was freed, but the pointer itself was not set to NULL.
Later, the memory was reused and the password appeared not to be
empty, so that an attempt was made to reference it.

Oliver Elphick