Package: libjudydebian1 Version: 1.0.5-1.1 Severity: grave Tags: upstream Justification: renders package unusable
Dear Maintainer, gcc-4.8.3+ miscompile libjudy on AMD64. Workarounds: * use -fno-aggressive-loop-optimizations * compile witn gcc-4.7 * compile with clang :-) Judy's quite obscure; I've not seen any obvious bug, but it's a challenge to compilers... And -fno-aggressive-loop-optimizations works around the bug so I hesitate to fill a PR on https://gcc.gnu.org/bugzilla/. Oh yes, GCC upstream doesn't work either (tested w/pristine 4.8.3 and 4.9.1). Here's a testcase: ---><--- // testj1.cc #include <cstdint> #include <stdexcept> #include <Judy.h> using namespace std; namespace { uint64_t Items[] = { 39895168241613, 72383693324832, 395899889036069, 847472082254022, 946081064318053, 1037167590154045, 1633874457044695, 1693551557777793, 1699866756097333, 2297933432179674, 2340748542246111, 2490696201066604, 2928757784612027, 3419613478295142, 3477583438964521, 3487665594607298, 3714788097418699, 3721974488148864, 3758589574777127, 4156020789217938, 4459711081140573, 4682530741276476, 4731624807195863, 4846840683894723, 4857387254864689, 4873346723597917, 4966839149608974, 5631406002858271, 5722255428668219, 5820718729024077, 6209639118315956, 6406299749329887, 6454295835737737, 6503048444249319, 6520786252857121, 6906836761168795, 6926132865086029, 6954533820994232 }; } int main(int /*argc*/, char const * /*argv*/[]) { int Rc_int; // boolean values returned (0 or 1) Pvoid_t PJ1Array = nullptr; // initialize Judy1 array for (auto item: Items) { // set item J1S(Rc_int, PJ1Array, item); // get last (with value <= ii) auto ii = item; J1L(Rc_int, PJ1Array, ii); if (ii != item) throw runtime_error("J1L: ii != item"); } return 0; } ---><--- This program inserts increasing int64_t's into a Judy1 array. After each insert, it checks whether the last item is what was just added. $ g++ -O3 -g -W -Wall -pipe -std=c++11 testj1.cc -o testj1 -lJudy Expected result: $ ./testj1 $ Actual result: $ ./testj1 terminate called after throwing an instance of 'std::runtime_error' what(): J1L: ii != item Aborted (core dumped) $ Thanks! Yves -- System Information: Debian Release: jessie/sid APT prefers testing-updates APT policy: (500, 'testing-updates'), (500, 'testing') Architecture: amd64 (x86_64) Kernel: Linux 3.16.0-3-generic (SMP w/4 CPU cores) Locale: LANG=C, LC_CTYPE=C (charmap=ANSI_X3.4-1968) Shell: /bin/sh linked to /bin/dash Versions of packages libjudydebian1 depends on: ii libc6 2.19-7 libjudydebian1 recommends no packages. libjudydebian1 suggests no packages. -- no debconf information -- To UNSUBSCRIBE, email to [email protected] with a subject of "unsubscribe". Trouble? Contact [email protected]
