On Sat, Apr 02, 2022 at 06:41:30PM +0700, John Naylor wrote: > On Sat, Apr 2, 2022 at 5:27 PM Thomas Munro <thomas.mu...@gmail.com> wrote: > > Reproduced locally, using the same few lines from the cluster.sql > > test. I'll try to dig more tomorrow... > > Thanks! Unfortunately I can't reproduce locally with clang 13/gcc 11, > with -Og or -O2 with CFLAGS="-fsanitize=undefined,alignment" ...
Like Thomas just said, I had to use: CFLAGS="-Og -fsanitize=undefined,alignment -fno-sanitize-recover=all I'm a couple few steps out of my league here, but it may be an issue with: commit 4ea51cdfe85ceef8afabceb03c446574daa0ac23 Author: Robert Haas <rh...@postgresql.org> Date: Mon Jan 19 15:20:31 2015 -0500 Use abbreviated keys for faster sorting of text datums. This is enough to avoid the crash, which might be a useful hint.. @@ -4126,22 +4126,23 @@ copytup_cluster(Tuplesortstate *state, SortTuple *stup, void *tup) /* * set up first-column key value, and potentially abbreviate, if it's a * simple column */ + stup->isnull1 = false; if (state->indexInfo->ii_IndexAttrNumbers[0] == 0) return; original = heap_getattr(tuple, state->indexInfo->ii_IndexAttrNumbers[0], state->tupDesc, &stup->isnull1);