what can be wrong? backport plpgpsm to 8.1

Hello

I am working on backport plpgpsm to 8.1. This interpret is based on plpgsql
8.2. There is some strange. Where I do rollback transaction, then on 8.1
postgresql go down on segfault. 8.2 and 8.3 works well.

I don't see any important difference, why 8.1. have to down.

#0 0x081564f1 in AlterDomainDropConstraint (names=0x876eb2c,
constrName=0x871d4f8 "", behavior=3213261032) at typecmds.c:1399
#1 0x00d97c9c in ?? ()
#2 0x0876eb2c in ?? ()
#3 0x0871d4f8 in ?? ()
#4 0xbf8678e8 in ?? ()
#5 0x080b0d81 in btree_redo (lsn={xlogid = 0, xrecoff = 0}, record=0x0) at
nbtxlog.c:431
#6 0x080b0d81 in btree_redo (lsn={xlogid = 5, xrecoff = 0}, record=0x1) at
nbtxlog.c:431
#7 0x080b49a8 in PrepareTransaction () at xact.c:1847
#8 0x080b4c06 in AbortSubTransaction () at xact.c:3806
#9 0x081d7c3a in dovec (v=0x873fc50, cv=0x875196c, lp=0x0, rp=0x875196c) at
regcomp.c:1721
#10 0x081d891a in parsebranch (v=0x875196c, stopper=0, type=135311595,
left=0xbf867be8, right=0x0, partial=0) at regcomp.c:717
#11 0x081da153 in pg_regcomp (re=0x4, string=0x86ff4b8, len=141554824,
flags=137272710) at regcomp.c:366
#12 0x081ade68 in make_rels_by_joins (root=0x19, level=1, joinrels=0x0) at
../../../../src/include/nodes/pg_list.h:87
#13 0x081aed66 in find_mergeclauses_for_pathkeys (root=0x3,
pathkeys=0x86fd4e0, restrictinfos=0xbf868e98) at pathkeys.c:1357
#14 0x0816d559 in ExecEvalParam (exprstate=0x10, econtext=0x0,
isNull=0xbf868ef8 "", isDone=0x0) at execQual.c:732
#15 0x007aaf2c in ?? ()
#16 0x00791ca0 in ?? ()
#17 0x082773d0 in SearchSysCacheCopy (cacheId=135713552, key1=3,
key2=3213266724, key3=136803280, key4=136803264) at syscache.c:645
#18 0x08078981 in ?? ()

any ideas?

Thank you
Pavel Stehule

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