The version of gfortran I use is 10.1.0. Via Homebrew, it seems impossible to 
install only gfortran (i.e., without gcc).

> 2020/07/12 11:52、Dima Pasechnik <[email protected]>のメール:
> 
>    gfortran:f77: scipy/sparse/linalg/eigen/arpack/ARPACK/UTIL/icopy.f
>    error: Command "gfortran -Wall -g -ffixed-form
> -fno-second-underscore -fPIC -O3 -funroll-loops
> -Iscipy/sparse/linalg/eigen/arpack/ARPACK/SRC
> -I/Users/iohara/Desktop/sage-9.2.beta4/local/lib/python3.7/site-packages/numpy/core/include
> -c -c scipy/sparse/linalg/eigen/arpack/ARPACK/SRC/dsaitr.f -o
> build/temp.macosx-10.14-x86_64-3.7/scipy/sparse/linalg/eigen/arpack/ARPACK/SRC/dsaitr.o"
> failed with exit status 1
> 
> what is the version of gfortran you use?
> 
> It is by any chance gfortran-10 (from Homebrew) ?
> (unfortunately scipy log does not say)
> In this case please uninstall package gcc and install package gfortran
> https://formulae.brew.sh/cask/gfortran#default 
> <https://formulae.brew.sh/cask/gfortran#default>
> 
> On Sun, Jul 12, 2020 at 8:22 AM Kenji Iohara <[email protected] 
> <mailto:[email protected]>> wrote:
>> 
>> I couldn’t compile it; it stops at scipy-1.2.3.  I am using Mac OS X.15.5 
>> with Intel Core i5,
>> and the log-file is attached to this email.
>> 
>> --
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>>  
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>> 
>> 
>> 2020/07/11 16:31、Dima Pasechnik <[email protected]>のメール:
>> 
>> perhaps we should update notebook to 5.7.10 ?
>> 
>> On Sat, 11 Jul 2020, 15:10 'Jonathan Kliem' via sage-release, 
>> <[email protected]> wrote:
>>> 
>>> Ok, I think it has nothing to do with #30030.
>>> 
>>> Running
>>> 
>>> make build
>>> 
>>> leads to the blank screen for the notebook (also with "./configure" before).
>>> 
>>> Running
>>> 
>>> sage -b
>>> 
>>> fixes it (but only until you run `make build` again).
>>> 
>>> Am Samstag, 11. Juli 2020 15:35:56 UTC+2 schrieb Dima Pasechnik:
>>>> 
>>>> I can confirm that it does break things for me too (and reverting fixes)
>>>> on Linux/Firefox.
>>>> 
>>>> But if I re-revert back, everything works. So this is some kind  of
>>>> caching issue, I gather.
>>>> 
>>>> On Sat, Jul 11, 2020 at 1:40 PM 'Jonathan Kliem' via sage-release
>>>> <[email protected]> wrote:
>>>>> 
>>>>> https://trac.sagemath.org/ticket/30030 broke the jupyter notebook for me.
>>>>> 
>>>>> Please wait while the Sage Jupyter Notebook server starts...
>>>>> [I 14:23:35.535 NotebookApp] Using MathJax: 
>>>>> nbextensions/mathjax/MathJax.js
>>>>> [I 14:23:35.655 NotebookApp] Serving notebooks from local directory: 
>>>>> /home/mi/kliem
>>>>> [I 14:23:35.655 NotebookApp] The Jupyter Notebook is running at:
>>>>> [I 14:23:35.655 NotebookApp] 
>>>>> http://localhost:8888/?token=13410c6dbd032a2e31784207d69dcb1bbf54374b475a6449
>>>>> [I 14:23:35.656 NotebookApp] Use Control-C to stop this server and shut 
>>>>> down all kernels (twice to skip confirmation).
>>>>> [C 14:23:35.658 NotebookApp]
>>>>> 
>>>>>    To access the notebook, open this file in a browser:
>>>>>        file:///run/user/284784/jupyter/nbserver-12512-open.html
>>>>>    Or copy and paste one of these URLs:
>>>>>        
>>>>> http://localhost:8888/?token=13410c6dbd032a2e31784207d69dcb1bbf54374b475a6449
>>>>> [I 14:23:47.500 NotebookApp] 302 GET 
>>>>> /?token=13410c6dbd032a2e31784207d69dcb1bbf54374b475a6449 (127.0.0.1) 
>>>>> 0.33ms
>>>>> [I 14:23:55.390 NotebookApp] Creating new notebook in
>>>>> [W 14:23:55.908 NotebookApp] 404 GET 
>>>>> /nbextensions/mathjax/MathJax.js?config=TeX-AMS-MML_HTMLorMML-full,Safe&delayStartupUntil=configured
>>>>>  (127.0.0.1) 5.67ms 
>>>>> referer=http://localhost:8888/notebooks/Untitled2.ipynb?kernel_name=sagemath
>>>>> [W 14:24:54.535 NotebookApp] 404 GET 
>>>>> /nbextensions/mathjax/MathJax.js?config=TeX-AMS-MML_HTMLorMML-full,Safe&delayStartupUntil=configured
>>>>>  (127.0.0.1) 1.72ms 
>>>>> referer=http://localhost:8888/notebooks/Dokumente/SageDays109/CombinatorialPolyhedron.ipynb
>>>>> 
>>>>> All I'm seeing is something like this. I can navigate the folders, but 
>>>>> when I open a file I just see a blank page in the browser.
>>>>> 
>>>>> It worked just fine on debian buster and ubuntu bionic. Reverting the 
>>>>> commit it works fine again. I'm using firefox, but I cannot get it to 
>>>>> work on chromium either.
>>>>> 
>>>>> Am Donnerstag, 9. Juli 2020 00:50:33 UTC+2 schrieb Volker Braun:
>>>>>> 
>>>>>> 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
>>>>>> 
>>>>>> 02b0be1ff8 Updated SageMath version to 9.2.beta4
>>>>>> 3e65aa67cc Trac #29878: Remove `sage -twistd` from `src/bin/sage`
>>>>>> 
>>>>>> a3308ffb43 Trac #29862: Installation guide: change python version in 
>>>>>> conda instructions
>>>>>> a6215602a5 Trac #29828: Broken conversion from ZZ['x'] to Qp['y']
>>>>>> 5d2577a0ce Trac #29746: Document integer overflow bug in 
>>>>>> vector_space_dimension()
>>>>>> d0e1751d76 Trac #30050: add even more missing empty lines in the doc
>>>>>> 87d9811918 Trac #30048: get rid of python2 mentioned in 
>>>>>> .github/workflows and README.md
>>>>>> aaa2bdf045 Trac #30042: clarify docs of nauty_geng
>>>>>> 381891c57c Trac #30028: remove some traces of __cmp__
>>>>>> 917f8de0eb Trac #30021: FPLLL 5.3.3
>>>>>> 837e9ad07a Trac #30005: Small documentation fixes in combinat
>>>>>> 063c266cbf Trac #29997: a bunch of typos
>>>>>> ac7ee1abe6 Trac #29994: Add integral curves over QQ
>>>>>> 55556612f2 Trac #29917: Move ChainComplexes from 
>>>>>> sage.categories.category_types to a separate module
>>>>>> 736ceffc41 Trac #29910: sage.rings.finite_rings.element_givaro: Remove 
>>>>>> dependency on NTL
>>>>>> 2bb470b2f2 Trac #29897: database_stein_watkins_mini installation is 
>>>>>> broken
>>>>>> ad109e3649 Trac #29851: tox.ini: debian-bullseye, -sid have Python3.8 
>>>>>> instead of 3.7
>>>>>> 8de8febcb6 Trac #29808: fix left and right actions of permutations on 
>>>>>> matrices
>>>>>> 76f6767a09 Trac #29794: spring cleanup in modsym/space.py
>>>>>> f62fb5f99e Trac #29787: 1 optional internet oeis doctest failing (busy 
>>>>>> beaver ordering)
>>>>>> 1f983640f6 Trac #29733: Create gitattributes file specifying proper line 
>>>>>> endings
>>>>>> bed0bc6493 Trac #29714: some micro optimisations in comparison to empty 
>>>>>> list
>>>>>> d000965b0a Trac #29668: map_coefficients for Laurent polynomials
>>>>>> 5ef2540085 Trac #29605: plotting function for forests
>>>>>> 98a1c9be6d Trac #29514: implement formatting of elements in RDF/CDF
>>>>>> 6629f4c3a9 Trac #12074: real nth root function
>>>>>> 8cb2f93213 Trac #8111: gcd of rationals is trouble
>>>>>> 55663b6cc7 Trac #30057: remove some old "known bug" tags about log
>>>>>> 48a6328304 Trac #30047: add missing empty lines in the doc
>>>>>> 8aebea9275 Trac #30034: Description of ramification_index in 
>>>>>> local_generic is wrong
>>>>>> aa4e325083 Trac #30030: Prevent JSmol from phoning home
>>>>>> 20ea231df1 Trac #30019: 1 internet doctest failing in 
>>>>>> combinat/quickref.py
>>>>>> 030a4794fe Trac #30009: using coprime_integers in more places
>>>>>> 1cecf97864 Trac #30007: Allow regular partition tuples to have different 
>>>>>> \ell values on different components
>>>>>> 684446ab04 Trac #30006: implement multiplicative_order for elements of AA
>>>>>> 1a9e4473b1 Trac #30004: Added new constructions for BIBDs
>>>>>> a01f419522 Trac #30003: some details in Kloosterman sums
>>>>>> d4caf56bd2 Trac #29987: build/make/install: Do not depend on 
>>>>>> src/bin/sage-version.sh
>>>>>> 02e6a8d2bd Trac #29959: Extended the construction of BIBDs to allow for 
>>>>>> \lambda different from 1
>>>>>> 7d65facffb Trac #29955: Reduction from dancing links instance to MILP 
>>>>>> instance
>>>>>> 9b8c6b24d7 Trac #29953: Let diff() act on chart functions and 
>>>>>> differentiable forms
>>>>>> aba874e2bc Trac #29952: simplify Seifert matrix code
>>>>>> 0feaa365b4 Trac #29940: sage.doctest: Remove handling of sagenb
>>>>>> 1c1284c0f5 Trac #29937: remove deprecated things in plot3d and structure
>>>>>> 08f24ca812 Trac #29933: refresh faq-contribute
>>>>>> cf4d9ff8ae Trac #29928: implement action of DifferentialWeylAlgebra on 
>>>>>> polynomials
>>>>>> 568d80a378 Trac #29926: shifting issue in padic function: preprocess_list
>>>>>> 0e4aa016a8 Trac #29925: shifting issue in padic function: 
>>>>>> _polynomial_list
>>>>>> 2de06fc429 Trac #29920: Remove deprecated scripts sage-list-optional, 
>>>>>> sage-list-experimental, sage-list-standard
>>>>>> df41dca2b0 Trac #29916: sage.structure, sage.misc: Replace import of 
>>>>>> sage.categories.all by more specific imports
>>>>>> f9fdd736af Trac #29914: cython code for Moebius and Coxeter matrices of 
>>>>>> posets
>>>>>> bfacdd6bdf Trac #29909: Add tox as a type=optional, source=pip package
>>>>>> b0e01a3202 Trac #29906: Run tests for `an_affine_basis`
>>>>>> 12eddec434 Trac #29903: Run many test suite examples for polyhedra
>>>>>> c6e56b30f2 Trac #29883: sage.structure: Remove some module-level imports
>>>>>> a70567b122 Trac #29894: add minimal interface for using ZZ[x]-matrices 
>>>>>> from flint
>>>>>> a061db04bc Trac #29893: Another speedup of hypergeometric trace formula
>>>>>> 62b405c4f3 Trac #29892: Move sage.misc.misc.coeff_repr, repr_lincomb to 
>>>>>> new module sage.misc.repr
>>>>>> 699bf78e8c Trac #29867: Remove __div__ methods from cython modules
>>>>>> 5eaa10e139 Trac #29855: sagelib setup.py: Fix dependencies on header 
>>>>>> files of packages gmp, ntl
>>>>>> 184cd6cc13 Trac #29723: inverses of ring homomorphisms
>>>>>> fc1f2cce4c Trac #29615: Fusion Ring Operations; Central Charge
>>>>>> 128a94d513 Trac #27934: Implement efficient all eccentricity computation 
>>>>>> for undirected graphs
>>>>>> 9ed0896af5 Trac #27036: FusionRing enhancements
>>>>>> 1af2945a15 Trac #20104: sage --package: Add commands "list :standard:", 
>>>>>> "update-latest" (for packages from PyPI), "upload"
>>>>>> 7e1f35fb32 Trac #15496: Incorrect result for divergent integral
>>>>>> b5858f5710 Trac #30014: freetype version comparison in spkg-configure.m4 
>>>>>> is wrong
>>>>>> 1e9f325d06 Trac #30002: force C locale in docbuild and remove some 
>>>>>> obsolete stuff
>>>>>> 5deea3dc41 Trac #29192: MR41: Add option to persist camera state to 
>>>>>> three.js viewer.
>>>>>> a79b0fc01d Updated SageMath version to 9.2.beta3
>>>>>> 
>>>>>> 
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