Hi, I've just updated my raspberry pi 3 from postgresql-13.3 on bullseye/armv6 to postgresq-15.5 on debian-bookworm/armv8. However after the upgrade, I experience reproducable crashes quering the following table: CREATE TABLE public.smartmeter ( leistungsfaktor real, momentanleistung integer, spannungl1 real, spannungl2 real, spannungl3 real, stroml1 real, stroml2 real, stroml3 real, wirkenergien real, wirkenergiep real, ts timestamp with time zone NOT NULL ); CREATE INDEX smartmeter_ts_idx ON public.smartmeter USING brin (ts); with the following query: SELECT floor(extract(epoch from ts)/60)*60 AS "time", AVG(spannungL1) as l1, AVG(spannungL2) as l2, AVG(spannungL3) as l3 FROM smartmeter WHERE ts BETWEEN '2023-12-01T13:01:30.514Z' AND '2023-12-25T19:01:30.514Z' GROUP BY time order by time; any ideas how to diagnose the issue further? is this a known problem? Thanks & best regards, Clemens Using host libthread_db library "/lib/aarch64-linux-gnu/libthread_db.so.1". 0x0000007ff6eb7fe0 in __GI_epoll_pwait (epfd=4, events=0x5555ea2d20, maxevents=1, timeout=timeout@entry=-1, set=set@entry=0x0) at ../sysdeps/unix/sysv/linux/epoll_pwait.c:40 40 ../sysdeps/unix/sysv/linux/epoll_pwait.c: No such file or directory. (gdb) c Continuing. Program received signal SIGUSR1, User defined signal 1. 0x0000007ff6ea7f58 in __libc_pread64 (fd=25, buf=buf@entry=0x7feb754880, count=count@entry=8192, offset=offset@entry=16384) at ../sysdeps/unix/sysv/linux/pread64.c:25 25 ../sysdeps/unix/sysv/linux/pread64.c: No such file or directory. (gdb) c Continuing. Program received signal SIGSEGV, Segmentation fault. 0x0000007fe5e6a9f0 in ?? () from /lib/aarch64-linux-gnu/libLLVM-14.so.1 (gdb) bt full #0 0x0000007fe5e6a9f0 in ?? () from /lib/aarch64-linux-gnu/libLLVM-14.so.1 No symbol table info available. #1 0x0000007fe59bb49c in llvm::raw_ostream::write(char const*, unsigned long) () from /lib/aarch64-linux-gnu/libLLVM-14.so.1 No symbol table info available. #2 0x0000007fe6d71048 in llvm::MCContext::createTempSymbol(llvm::Twine const&, bool) () from /lib/aarch64-linux-gnu/libLLVM-14.so.1 No symbol table info available. #3 0x0000007fe6d713f0 in llvm::MCContext::createTempSymbol() () from /lib/aarch64-linux-gnu/libLLVM-14.so.1 No symbol table info available. #4 0x0000007fe6d95c6c in llvm::MCObjectStreamer::emitCFIEndProcImpl(llvm::MCDwarfFrameInfo&) () from /lib/aarch64-linux-gnu/libLLVM-14.so.1 No symbol table info available. #5 0x0000007fe619f4c0 in ?? () from /lib/aarch64-linux-gnu/libLLVM-14.so.1 No symbol table info available. #6 0x0000007fe6180b6c in llvm::AsmPrinter::emitFunctionBody() () from /lib/aarch64-linux-gnu/libLLVM-14.so.1 No symbol table info available. #7 0x0000007fe72a4ba4 in ?? () from /lib/aarch64-linux-gnu/libLLVM-14.so.1 No symbol table info available. #8 0x0000007fe5d3122c in llvm::MachineFunctionPass::runOnFunction(llvm::Function&) () from /lib/aarch64-linux-gnu/libLLVM-14.so.1 No symbol table info available. #9 0x0000007fe5b14390 in llvm::FPPassManager::runOnFunction(llvm::Function&) () from /lib/aarch64-linux-gnu/libLLVM-14.so.1 No symbol table info available. #10 0x0000007fe5b1af70 in llvm::FPPassManager::runOnModule(llvm::Module&) () from /lib/aarch64-linux-gnu/libLLVM-14.so.1 No symbol table info available. #11 0x0000007fe5b14d98 in llvm::legacy::PassManagerImpl::run(llvm::Module&) () from /lib/aarch64-linux-gnu/libLLVM-14.so.1 No symbol table info available. #12 0x0000007fe7187d70 in llvm::orc::SimpleCompiler::operator()(llvm::Module&) () from /lib/aarch64-linux-gnu/libLLVM-14.so.1 No symbol table info available. #13 0x0000007fe71dc138 in ?? () from /lib/aarch64-linux-gnu/libLLVM-14.so.1 No symbol table info available. #14 0x0000007fe71dbf44 in llvm::orc::IRCompileLayer::emit(std::unique_ptr<llvm::orc::MaterializationResponsibility, std::default_delete<llvm::orc::MaterializationResponsibility> >, llvm::orc::ThreadSafeModule) () from /lib/aarch64-linux-gnu/libLLVM-14.so.1 No symbol table info available. #15 0x0000007fe71dc634 in llvm::orc::IRTransformLayer::emit(std::unique_ptr<llvm::orc::MaterializationResponsibility, std::default_delete<llvm::orc::MaterializationResponsibility> >, llvm::orc::ThreadSafeModule) () from /lib/aarch64-linux-gnu/libLLVM-14.so.1 No symbol table info available. #16 0x0000007fe71dc634 in llvm::orc::IRTransformLayer::emit(std::unique_ptr<llvm::orc::MaterializationResponsibility, std::default_delete<llvm::orc::MaterializationResponsibility> >, llvm::orc::ThreadSafeModule) () from /lib/aarch64-linux-gnu/libLLVM-14.so.1 No symbol table info available. #17 0x0000007fe71e2648 in llvm::orc::BasicIRLayerMaterializationUnit::materialize(std::unique_ptr<llvm::orc::MaterializationResponsibility, std::default_delete<llvm::orc::MaterializationResponsibility> >) () from /lib/aarch64-linux-gnu/libLLVM-14.so.1 No symbol table info available. #18 0x0000007fe7199c18 in llvm::orc::MaterializationTask::run() () from /lib/aarch64-linux-gnu/libLLVM-14.so.1 No symbol table info available. #19 0x0000007fe71a4ea0 in ?? () from /lib/aarch64-linux-gnu/libLLVM-14.so.1 No symbol table info available. #20 0x0000007fe719bad0 in llvm::orc::ExecutionSession::dispatchOutstandingMUs() () from /lib/aarch64-linux-gnu/libLLVM-14.so.1 No symbol table info available. #21 0x0000007fe719ea84 in llvm::orc::ExecutionSession::OL_completeLookup(std::unique_ptr<llvm::orc::InProgressLookupState, std::default_delete<llvm::orc::InProgressLookupState> >, std::shared_ptr<llvm::orc::AsynchronousSymbolQuery>, std::funct ion<void (llvm::DenseMap<llvm::orc::JITDylib*, llvm::DenseSet<llvm::orc::SymbolStringPtr, llvm::DenseMapInfo<llvm::orc::SymbolStringPtr, void> >, llvm::DenseMapInfo<llvm::orc::JITDylib*, void>, llvm::detail::DenseMapPair<llvm::orc::JITDylib*, llvm::DenseSet<llvm::orc::SymbolStringPtr, llvm::DenseMapInfo<llvm::orc::SymbolStringPtr, void> > > > const&)>) () from /lib/aarch64-linux-gnu/libLLVM-14.so.1 No symbol table info available. #22 0x0000007fe71ab544 in ?? () from /lib/aarch64-linux-gnu/libLLVM-14.so.1 No symbol table info available. #23 0x0000007fe718dd90 in llvm::orc::ExecutionSession::OL_applyQueryPhase1(std::unique_ptr<llvm::orc::InProgressLookupState, std::default_delete<llvm::orc::InProgressLookupState> >, llvm::Error) () from /lib/aarch64-linux-gnu/libLLVM-14.so.1 No symbol table info available. #24 0x0000007fe718bf34 in llvm::orc::ExecutionSession::lookup(llvm::orc::LookupKind, std::vector<std::pair<llvm::orc::JITDylib*, llvm::orc::JITDylibLookupFlags>, std::allocator<std::pair<llvm::orc::JITDylib*, llvm::orc::JITDylibLookupFlags> > --Type <RET> for more, q to quit, c to continue without paging-- > const&, llvm::orc::SymbolLookupSet, llvm::orc::SymbolState, llvm::unique_function<void (llvm::Expected<llvm::DenseMap<llvm::orc::SymbolStringPtr, llvm::JITEvaluatedSymbol, llvm::DenseMapInfo<llvm::orc::SymbolStringPtr, void>, llvm::detail::D enseMapPair<llvm::orc::SymbolStringPtr, llvm::JITEvaluatedSymbol> > >)>, std::function<void (llvm::DenseMap<llvm::orc::JITDylib*, llvm::DenseSet<llvm::orc::SymbolStringPtr, llvm::DenseMapInfo<llvm::orc::SymbolStringPtr, void> >, llvm::DenseMap Info<llvm::orc::JITDylib*, void>, llvm::detail::DenseMapPair<llvm::orc::JITDylib*, llvm::DenseSet<llvm::orc::SymbolStringPtr, llvm::DenseMapInfo<llvm::orc::SymbolStringPtr, void> > > > const&)>) () from /lib/aarch64-linux-gnu/libLLVM-14.so.1 No symbol table info available. #25 0x0000007fe719bce0 in llvm::orc::ExecutionSession::lookup(std::vector<std::pair<llvm::orc::JITDylib*, llvm::orc::JITDylibLookupFlags>, std::allocator<std::pair<llvm::orc::JITDylib*, llvm::orc::JITDylibLookupFlags> > > const&, llvm::orc::Sy mbolLookupSet const&, llvm::orc::LookupKind, llvm::orc::SymbolState, std::function<void (llvm::DenseMap<llvm::orc::JITDylib*, llvm::DenseSet<llvm::orc::SymbolStringPtr, llvm::DenseMapInfo<llvm::orc::SymbolStringPtr, void> >, llvm::DenseMapInfo <llvm::orc::JITDylib*, void>, llvm::detail::DenseMapPair<llvm::orc::JITDylib*, llvm::DenseSet<llvm::orc::SymbolStringPtr, llvm::DenseMapInfo<llvm::orc::SymbolStringPtr, void> > > > const&)>) () from /lib/aarch64-linux-gnu/libLLVM-14.so.1 No symbol table info available. Backtrace stopped: previous frame identical to this frame (corrupt stack?)