BUG #1542: pg_dump seg fault

The following bug has been logged online:

Bug reference: 1542
Logged by: Andrew Slobodyanyk
Email address: slob(at)ukr(dot)net
PostgreSQL version: 8.0.1
Operating system: linux 2.4.26, gcc 3.2.2
Description: pg_dump seg fault
Details:

After power failure any operation with tbl_test return "ERROR: could not
open relation 1663/17242/40429: No such file or directory". I try to get
information from other tables, but with or without (after deleting that
table) pg_dump crashes with seg. fault. Backtrace is:
pg_dump: reading rewrite rules

Program received signal SIGSEGV, Segmentation fault.
getRules (numRules=0x0) at pg_dump.c:3159
3159 ruleinfo[i].dobj.namespace =
ruleinfo[i].ruletable->dobj.namespace;

(gdb) bt
#0 getRules (numRules=0x0) at pg_dump.c:3159
#1 0x080585e9 in getSchemaData (numTablesPtr=0x0, schemaOnly=0 '\0',
dataOnly=0 '\0') at common.c:142
#2 0x0804a88e in main (argc=3, argv=0xbffffd34) at pg_dump.c:559
#3 0x40138b57 in __libc_start_main () from /lib/libc.so.6

(gdb) p i
$3 = 62

(gdb) p ruleinfo[i]
$4 = {dobj = {objType = DO_RULE, catId = {tableoid = 16410, oid = 40941},
dumpId = 1237, name = 0x80785f8 "_RETURN", namespace = 0x0,
dependencies = 0x0, nDeps = 0, allocDeps = 0}, ruletable = 0x0,
ev_type = 55 '7', is_instead = 0 '\0', separate = 8 '\b'}