This problem is being discussed at https://trac.sagemath.org/ticket/28008. 
As François says, you can touch matrix_rational_dense.pyx and do "sage -b", 
or you can do "sage -ba" to rebuild all of Sage's library files, in case 
other ones are also affected.


On Wednesday, June 19, 2019 at 5:52:19 PM UTC-7, François Bissey wrote:
>
> You shouldn't need two copies. It is more like a dependency issue. 
> sage/matrix/matrix_rational_dense.so (and may be other) should be 
> re-built during the incremental build but isn’t/aren't. 
> Touching the relevant .pyx file and using `./sage -b` should fix it. 
>
> > On 20/06/2019, at 12:48 PM, Paul Masson <paulm...@comcast.net 
> <javascript:>> wrote: 
> > 
> > In an incremental build from beta 7 on macOX Mojave (10.14.5), I'm still 
> encountering a crash-inducing issue with openblas. The relevant part of the 
> crash log is 
> > 
> > ImportError: 
> dlopen(/Users/Masson/Downloads/GitHub/sage/local/lib/python2.7/site-packages/sage/matrix/matrix_rational_dense.so,
>  
> 2): Library not loaded: 
> /Users/Masson/Downloads/GitHub/sage/local/lib/libopenblas_haswellp-r0.3.5.dylib
>  
>
> >   Referenced from: 
> /Users/Masson/Downloads/GitHub/sage/local/lib/python2.7/site-packages/sage/matrix/matrix_rational_dense.so
>  
>
> >   Reason: image not found 
> > 
> > I can work around it by creating a second copy of libopenblas and 
> changing its last digit to 5, but why would I need two copies of the 
> library? 
> > 
> > On Wednesday, June 19, 2019 at 2:54:06 PM UTC-7, Volker Braun wrote: 
> > As always, you can get the latest beta version from the "develop" git 
> branch. Alternatively, the self-contained source tarball is at 
> http://www.sagemath.org/download-latest.html 
> > 
> > 
> > 8084b69595 (tag: 8.8.rc2, trac/develop) Updated SageMath version to 
> 8.8.rc2 
> > ab2ee449bb Trac #27961: openblas 0.3.6 vs. OS X on some processors 
> > 57e1ba71f9 Trac #27950: Replace source activate by conda activate in 
> conda install guide 
> > 8df690fd2a (tag: 8.8.rc1) Updated SageMath version to 8.8.rc1 
> > 
> > 
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