mathicgb F4 algorithm sometimes killed or gives wrong results on s390x and armhf
@mikestillman is already working on this.
Since Jun 27, 2021.
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Description
I got the following on PPA builds of the `development` branch in every Ubuntu release ([18.04](https://launchpadlibrarian.net/545736949/buildlog_ubuntu-bionic-s390x.macaulay2_1.18.0.1+git202106261928-0ppa202106241300~ubuntu18.04.1_BUILDING.txt.gz), [20.04](https://launchpadlibrarian.net/545737061/buildlog_ubuntu-focal-s390x.macaulay2_1.18.0.1+git202106261928-0ppa202106241300~ubuntu20.04.1_BUILDING.txt.gz), [20.10](https://launchpadlibrarian.net/545736796/buildlog_ubuntu-groovy-s390x.macaulay2_1.18.0.1+git202106261928-0ppa202106241300~ubuntu20.10.1_BUILDING.txt.gz), [21.04](https://launchpadlibrarian.net/545736948/buildlog_ubuntu-hirsute-s390x.macaulay2_1.18.0.1+git202106261928-0ppa202106241259~ubuntu21.04.1_BUILDING.txt.gz), and [21.10](https://launchpadlibrarian.net/545736981/buildlog_ubuntu-impish-s390x.macaulay2_1.18.0.1+git202106261928-0ppa202106241259~ubuntu21.10.1_BUILDING.txt.gz)) in s390x:
```m2
-- capturing example results for "randomKRationalPoint" Killed
make[3]: *** [Makefile:94: /<>/macaulay2-1.18.0.1+git202106261928/M2/usr-dist/s390x-Linux-Ubuntu-21.04/lib/s390x-linux-gnu/Macaulay2/Macaulay2Doc/.installed] Error 137
```
This example has never been a problem before. Does it use any memtailor/mathic/mathicgb code? The only major thing I think that has changed since the last set of builds is #2160.
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