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 Touch seeded packages, which is subscribed to python3-defaults in Ubuntu. https://bugs.launchpad.net/bugs/1871451 Title: powerpc segfault on exponential of negative in python Status in cloud-images: New Status in python3-defaults package in Ubuntu: New Bug description: When calculating the exponential of a negative number in python 3.6 with the Ubuntu 18.04 Docker image (ppcle64), I receive a segfault. ``` 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 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 ``` Cross-posted to StackOverflow: https://stackoverflow.com/questions/61084969/python-segfault- calculating-exponential-of-negative-ppc64le To manage notifications about this bug go to: https://bugs.launchpad.net/cloud-images/+bug/1871451/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
