** 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
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https://bugs.launchpad.net/bugs/1871451
Title:
powerpc segfault on exponential of negative in python
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