On Fri, May 15, 2026 at 9:09 AM Tom Lane <[email protected]> wrote: > (b) the failure only appeared on buildfarm members running on ppc64 > or s390x. I determined by examining assembly code that ppc64 uses > about 3X as much stack per call level in this function as x86_64; > probably s390x is similar. That was enough to overrun our default > max_stack_depth on these architectures, even though the same case > passed on the machines we'd tested on.
FWIW, I tried to reproduce with the former new tests un-reverted, and didn't see stack overflow on the following, so unless I fat-fingered that I wonder if there's something more specific on the previously failing members: ppc64le / gcc 8.5 / Linux kernel 4.18 S390X / gcc 13.3 / Linux kernel 6.8 -- John Naylor Amazon Web Services
