[PATCH 0/4] reftable: fix out-of-memory errors on NonStop

Hi,

this small patch series fixes out-of-memory errors on NonStop with the reftable backend. These errors are caused by zero-sized allocations, which return `NULL` pointers on NonStop.

Thanks!

Patrick

---
Patrick Steinhardt (4):
      reftable/stack: don't perform auto-compaction with less than two tables
      reftable/merged: fix zero-sized allocation when there are no readers
      reftable/stack: fix zero-sized allocation when there are no readers
      reftable/basics: return NULL on zero-sized allocations

 reftable/basics.c |  7 +++++++
 reftable/merged.c | 12 +++++++-----
 reftable/stack.c  | 47 ++++++++++++++++++++++++++---------------------
 3 files changed, 40 insertions(+), 26 deletions(-)

--- base-commit: ff795a5c5ed2e2d07c688c217a615d89e3f5733b change-id: 20241220-b4-pks-reftable-oom-fix-without-readers-c7d8fda0694d