| <!-- |
| Please read this! |
| |
| Before opening a new issue, make sure to search for keywords in the issues |
| filtered by "bug::confirmed" or "bug::unconfirmed" and "bugzilla" label: |
| |
| - https://gitlab.com/libeigen/eigen/-/issues?scope=all&utf8=%E2%9C%93&state=opened&label_name[]=bug%3A%3Aconfirmed |
| - https://gitlab.com/libeigen/eigen/-/issues?scope=all&utf8=%E2%9C%93&state=opened&label_name[]=bug%3A%3Aunconfirmed |
| - https://gitlab.com/libeigen/eigen/-/issues?scope=all&utf8=%E2%9C%93&state=opened&label_name[]=bugzilla |
| |
| and verify the issue you're about to submit isn't a duplicate. --> |
| |
| ### Summary |
| <!-- Summarize the bug encountered concisely. --> |
| |
| ### Environment |
| <!-- Please provide your development environment here --> |
| - **Operating System** : Windows/Linux |
| - **Architecture** : x64/Arm64/PowerPC ... |
| - **Eigen Version** : 3.3.9 |
| - **Compiler Version** : Gcc7.0 |
| - **Compile Flags** : -O3 -march=native |
| - **Vector Extension** : SSE/AVX/NEON ... |
| |
| ### Minimal Example |
| <!-- If possible, please create a minimal example here that exhibits the problematic behavior. |
| You can also link to [godbolt](https://godbolt.org). But please note that you need to click |
| the "Share" button in the top right-hand corner of the godbolt page where you reproduce the sample |
| code to get the share link instead of in your browser address bar. |
| |
| You can read [the guidelines on stackoverflow](https://stackoverflow.com/help/minimal-reproducible-example) |
| on how to create a good minimal example. --> |
| |
| ```cpp |
| //show your code here |
| ``` |
| |
| ### Steps to reproduce |
| <!-- Describe how one can reproduce the issue - this is very important. Please use an ordered list. --> |
| |
| 1. first step |
| 2. second step |
| 3. ... |
| |
| ### What is the current *bug* behavior? |
| <!-- Describe what actually happens. --> |
| |
| ### What is the expected *correct* behavior? |
| <!-- Describe what you should see instead. --> |
| |
| ### Relevant logs |
| <!-- Add relevant code snippets or program output within blocks marked by " ``` " --> |
| |
| <!-- OPTIONAL: remove this section if you are not reporting a compilation warning issue.--> |
| ### Warning Messages |
| <!-- Show us the warning messages you got! --> |
| |
| <!-- OPTIONAL: remove this section if you are not reporting a performance issue. --> |
| ### Benchmark scripts and results |
| <!-- Please share any benchmark scripts - either standalone, or using [Google Benchmark](https://github.com/google/benchmark). --> |
| |
| ### Anything else that might help |
| <!-- It will be better to provide us more information to help narrow down the cause. |
| Including but not limited to the following: |
| - lines of code that might help us diagnose the problem. |
| - potential ways to address the issue. |
| - last known working/first broken version (release number or commit hash). --> |
| |
| - [ ] Have a plan to fix this issue. |
