[Bug 1871451] Re: powerpc segfault on exponential of negative in python
Oh I just read "Docker on Mac" plus the qemulation layer I assume through qemu-static, but it even isn't "our" qemu of Ubuntu then :-/ Not sure what to suggest, but just generally doe this trigger with all qemu's? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1871451 Title: powerpc segfault on exponential of negative in python To manage notifications about this bug go to: https://bugs.launchpad.net/cloud-images/+bug/1871451/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1871451] Re: powerpc segfault on exponential of negative in python
Hi, to be sure - this is qemu-tcg (emulation) for ppc64 right? We hit quite some issues when glibc added new instructions, that qemu- tcg could not run it anymore. Newer qemu fixed that just to see 20.04 added even more instrcutions that now fail now. But the lessons learned is that TCG on ppc64 is often a bit behind, so trying the very latest qemu often helps. Which qemu did you use - I assume just the one of 18.04. If you can try the builds from Ubuntu cloud archive which are for 18.04: $ add-apt-repository cloud-archive:ussuri-proposed ** Changed in: qemu (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1871451 Title: powerpc segfault on exponential of negative in python To manage notifications about this bug go to: https://bugs.launchpad.net/cloud-images/+bug/1871451/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1871451] Re: powerpc segfault on exponential of negative in python
This would be an issue for the package, I will close the track for cloud-images. ** Also affects: qemu (Ubuntu) Importance: Undecided Status: New ** Changed in: cloud-images Status: New => Invalid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1871451 Title: powerpc segfault on exponential of negative in python To manage notifications about this bug go to: https://bugs.launchpad.net/cloud-images/+bug/1871451/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1871451] Re: powerpc segfault on exponential of negative in python
Thank you. I have posted this as an issue on moby/qemu https://github.com/moby/qemu/issues/10 ** Bug watch added: github.com/moby/qemu/issues #10 https://github.com/moby/qemu/issues/10 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1871451 Title: powerpc segfault on exponential of negative in python To manage notifications about this bug go to: https://bugs.launchpad.net/cloud-images/+bug/1871451/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1871451] Re: powerpc segfault on exponential of negative in python
Hi, I tested this on a real ppc64le machine: root@1325f5985861:/# python3 -c "import math; print(math.exp(-1))" 0.36787944117144233 root@1325f5985861:/# uname -a Linux 1325f5985861 5.4.0-21-generic #25+lp1866909v202004031128-Ubuntu SMP Fri Apr 3 18:38:30 UTC 202 ppc64le ppc64le ppc64le GNU/Linux It looks like it's a qemu bug. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1871451 Title: powerpc segfault on exponential of negative in python To manage notifications about this bug go to: https://bugs.launchpad.net/cloud-images/+bug/1871451/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1871451] Re: powerpc segfault on exponential of negative in python
** Also affects: python3-defaults (Ubuntu) Importance: Undecided Status: New ** Description changed: When calculating the exponential of a negative number in python 3.6 with the Ubuntu 18.04 Docker image (ppcle64), I receive a segfault. ``` - python -c "import math; math.exp(-1)" + python3 -c "import math; math.exp(-1)" qemu: uncaught target signal 11 (Segmentation fault) - core dumped Segmentation fault ``` I am running this in Docker on macOS. Here are the steps to reproduce the error. ``` docker run --rm -it --platform linux/ppc64le ubuntu:18.04 apt-get update -qq && apt-get install -y -qq python3 python3 -c "import math; print(math.exp(0))" # 1.0 python3 -c "import math; print(math.exp(-0))" # 1.0 python3 -c "import math; print(math.exp(1))" # 2.718281828459045 python3 -c "import math; print(math.exp(-1))" ``` This error does not happen when using the debian:10 or alpine images. Here is the output of docker version on my machine: ``` Client: Docker Engine - Community - Version: 19.03.8 - API version: 1.40 - Go version:go1.12.17 - Git commit:afacb8b - Built: Wed Mar 11 01:21:11 2020 - OS/Arch: darwin/amd64 - Experimental: true + Version: 19.03.8 + API version: 1.40 + Go version:go1.12.17 + Git commit:afacb8b + Built: Wed Mar 11 01:21:11 2020 + OS/Arch: darwin/amd64 + Experimental: true Server: Docker Engine - Community - Engine: - Version: 19.03.8 - API version: 1.40 (minimum version 1.12) - Go version: go1.12.17 - Git commit: afacb8b - Built:Wed Mar 11 01:29:16 2020 - OS/Arch: linux/amd64 - Experimental: true - containerd: - Version: v1.2.13 - GitCommit:7ad184331fa3e55e52b890ea95e65ba581ae3429 - runc: - Version: 1.0.0-rc10 - GitCommit:dc9208a3303feef5b3839f4323d9beb36df0a9dd - docker-init: - Version: 0.18.0 - GitCommit:fec3683 + Engine: + Version: 19.03.8 + API version: 1.40 (minimum version 1.12) + Go version: go1.12.17 + Git commit: afacb8b + Built:Wed Mar 11 01:29:16 2020 + OS/Arch: linux/amd64 + Experimental: true + containerd: + Version: v1.2.13 + GitCommit:7ad184331fa3e55e52b890ea95e65ba581ae3429 + runc: + Version: 1.0.0-rc10 + GitCommit:dc9208a3303feef5b3839f4323d9beb36df0a9dd + docker-init: + Version: 0.18.0 + GitCommit:fec3683 ``` Cross-posted to StackOverflow: https://stackoverflow.com/questions/61084969/python-segfault- calculating-exponential-of-negative-ppc64le -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1871451 Title: powerpc segfault on exponential of negative in python To manage notifications about this bug go to: https://bugs.launchpad.net/cloud-images/+bug/1871451/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
