libgfortan appears to force downgrade

[tpdownes]

Solution to issue cannot be found in the documentation.

• I checked the documentation.

Issue

When I issue a conda update after installing go, it forces a downgrade. It appears libgfortan may be part of the issie.

~❯❯❯ conda update -n default --all --yes
Channels:
 - conda-forge
Platform: osx-64
Collecting package metadata (repodata.json): done
Solving environment: done

## Package Plan ##

  environment location: /Users/tpdownes/local/miniconda3/envs/default


The following packages will be downloaded:

    package                    |            build
    ---------------------------|-----------------
    go-1.20.7                  |       h480a608_0        81.3 MB  conda-forge
    libblas-3.9.0              |17_osx64_openblas          14 KB  conda-forge
    libcblas-3.9.0             |17_osx64_openblas          14 KB  conda-forge
    libgfortran-5.0.0          |11_3_0_h97931a8_32         158 KB  conda-forge
    libgfortran5-12.2.0        |      he409387_32         1.5 MB  conda-forge
    liblapack-3.9.0            |17_osx64_openblas          14 KB  conda-forge
    libopenblas-0.3.23         |openmp_h429af6e_0         5.7 MB  conda-forge
    ------------------------------------------------------------
                                           Total:        88.7 MB

The following packages will be UPDATED:

  libgfortran                       5.0.0-13_2_0_h97931a8_1 --> 5.0.0-11_3_0_h97931a8_32

The following packages will be DOWNGRADED:

  go                                      1.21.6-hb60353b_0 --> 1.20.7-h480a608_0
  libblas                           3.9.0-20_osx64_openblas --> 3.9.0-17_osx64_openblas
  libcblas                          3.9.0-20_osx64_openblas --> 3.9.0-17_osx64_openblas
  libgfortran5                            13.2.0-h2873a65_1 --> 12.2.0-he409387_32
  liblapack                         3.9.0-20_osx64_openblas --> 3.9.0-17_osx64_openblas
  libopenblas                      0.3.25-openmp_hfef2a42_0 --> 0.3.23-openmp_h429af6e_0

Installed packages

# packages in environment at /Users/tpdownes/local/miniconda3/envs/default:
#
# Name                    Version                   Build  Channel
_go_select                2.3.0                       cgo    conda-forge
bzip2                     1.0.8                h10d778d_5    conda-forge
c-ares                    1.25.0               h10d778d_0    conda-forge
ca-certificates           2023.11.17           h8857fd0_0    conda-forge
coreutils                 9.4                  h0dc2134_0    conda-forge
curl                      8.5.0                h726d00d_0    conda-forge
findutils                 4.6.0             hb7f2c08_1001    conda-forge
gettext                   0.21.1               h8a4c099_0    conda-forge
gh                        2.42.1               h990441c_0    conda-forge
git                       2.42.0          pl5321hbb4c4ee_0    conda-forge
go                        1.20.7               h480a608_0    conda-forge
google-cloud-sdk          460.0.0         py311h6eed73b_0    conda-forge
grep                      3.11                 h912d4ce_0    conda-forge
krb5                      1.21.2               hb884880_0    conda-forge
libblas                   3.9.0           17_osx64_openblas    conda-forge
libcblas                  3.9.0           17_osx64_openblas    conda-forge
libcurl                   8.5.0                h726d00d_0    conda-forge
libcxx                    16.0.6               hd57cbcb_0    conda-forge
libedit                   3.1.20191231         h0678c8f_2    conda-forge
libev                     4.33                 h10d778d_2    conda-forge
libexpat                  2.5.0                hf0c8a7f_1    conda-forge
libffi                    3.4.2                h0d85af4_5    conda-forge
libgfortran               5.0.0           11_3_0_h97931a8_32    conda-forge
libgfortran5              12.2.0              he409387_32    conda-forge
libiconv                  1.17                 hd75f5a5_2    conda-forge
liblapack                 3.9.0           17_osx64_openblas    conda-forge
libnghttp2                1.58.0               h64cf6d3_1    conda-forge
libopenblas               0.3.23          openmp_h429af6e_0    conda-forge
libsqlite                 3.44.2               h92b6c6a_0    conda-forge
libssh2                   1.11.0               hd019ec5_0    conda-forge
libzlib                   1.2.13               h8a1eda9_5    conda-forge
llvm-openmp               17.0.6               hb6ac08f_0    conda-forge
ncurses                   6.4                  h93d8f39_2    conda-forge
numpy                     1.26.3          py311hc43a94b_0    conda-forge
openssl                   3.2.0                hd75f5a5_1    conda-forge
packer                    1.10.0               h990441c_0    conda-forge
pcre2                     10.40                h1c4e4bc_0    conda-forge
perl                      5.32.1          7_h10d778d_perl5    conda-forge
pip                       23.3.2             pyhd8ed1ab_0    conda-forge
python                    3.11.7          h9f0c242_1_cpython    conda-forge
python_abi                3.11                    4_cp311    conda-forge
readline                  8.2                  h9e318b2_1    conda-forge
sed                       4.7               h3efe00b_1000    conda-forge
setuptools                69.0.3             pyhd8ed1ab_0    conda-forge
terraform                 1.6.6                h990441c_0    conda-forge
tk                        8.6.13               h1abcd95_1    conda-forge
tzdata                    2023d                h0c530f3_0    conda-forge
wheel                     0.42.0             pyhd8ed1ab_0    conda-forge
xz                        5.2.6                h775f41a_0    conda-forge
zstd                      1.5.5                h829000d_0    conda-forge

Environment info

active environment : default
    active env location : /Users/tpdownes/local/miniconda3/envs/default
            shell level : 1
       user config file : /Users/tpdownes/.condarc
 populated config files : /Users/tpdownes/local/miniconda3/.condarc
                          /Users/tpdownes/.condarc
          conda version : 23.11.0
    conda-build version : not installed
         python version : 3.10.12.final.0
                 solver : libmamba (default)
       virtual packages : __archspec=1=skylake
                          __conda=23.11.0=0
                          __osx=14.2.1=0
                          __unix=0=0
       base environment : /Users/tpdownes/local/miniconda3  (writable)
      conda av data dir : /Users/tpdownes/local/miniconda3/etc/conda
  conda av metadata url : None
           channel URLs : https://conda.anaconda.org/conda-forge/osx-64
                          https://conda.anaconda.org/conda-forge/noarch
          package cache : /Users/tpdownes/local/miniconda3/pkgs
                          /Users/tpdownes/.conda/pkgs
       envs directories : /Users/tpdownes/local/miniconda3/envs
                          /Users/tpdownes/.conda/envs
               platform : osx-64
             user-agent : conda/23.11.0 requests/2.31.0 CPython/3.10.12 Darwin/23.2.0 OSX/14.2.1 solver/libmamba conda-libmamba-solver/23.12.0 libmambapy/1.5.5
                UID:GID : 828971:89939
             netrc file : None
           offline mode : False

[tpdownes]

I can kinda workaround this by deliberately installing gfortran=13.2

[beckermr]

Yes I've seen this too without using go. It appears the solver moves back and forth, which means there are two equal priority solutions. Maybe @jaimergp can help us diagnose what about the packages the solver is reacting to?

[tpdownes]

Somehow getting even worse. I installed gfortan=13.2 but then issued another update and it's downgrading libgfortran5 and gfortan and go to ancient versions:

The following NEW packages will be INSTALLED:

  go-nocgo           conda-forge/osx-64::go-nocgo-1.13.5-h8b2e17f_0
  go-nocgo_osx-64    conda-forge/osx-64::go-nocgo_osx-64-1.13.5-he44337e_0

The following packages will be UPDATED:

  _go_select                                    2.2.0-nocgo --> 2.3.0-cgo
  libgfortran                       5.0.0-13_2_0_h97931a8_1 --> 5.0.0-11_3_0_h97931a8_32

The following packages will be DOWNGRADED:

  gfortran                                13.2.0-h2c809b3_1 --> 9.3.0-h768ea0c_15
  gfortran_impl_osx~                      13.2.0-h7643cbd_1 --> 9.3.0-h86db474_7
  gfortran_osx-64                         13.2.0-h18f7dce_1 --> 9.3.0-h268312c_8
  go                                      1.21.6-h85e1960_0 --> 1.13.5-hb30d042_0
  isl                                       0.25-hb486fe8_0 --> 0.22.1-hb1e8313_2
  libgfortran5                            13.2.0-h2873a65_1 --> 12.2.0-he409387_32

[tpdownes]

I suspect something may also be going on with _go_select as it's going up and down and between cgo / nocgo

[tpdownes]

As another data point, I removed everything related to go and also removed gfortran and then ran conda install go. It believes the following is a downgrade

~❯❯❯ conda install go
Channels:
 - conda-forge
Platform: osx-64
Collecting package metadata (repodata.json): done
Solving environment: done

## Package Plan ##

  environment location: /Users/tpdownes/local/miniconda3/envs/default

  added / updated specs:
    - go


The following packages will be downloaded:

    package                    |            build
    ---------------------------|-----------------
    libgfortran-5.0.0          |13_2_0_h97931a8_2         108 KB  conda-forge
    libgfortran5-13.2.0        |       h2873a65_2         1.5 MB  conda-forge
    ------------------------------------------------------------
                                           Total:         1.6 MB

The following NEW packages will be INSTALLED:

  _go_select         conda-forge/osx-64::_go_select-2.3.0-cgo
  go                 conda-forge/osx-64::go-1.21.6-hb60353b_0

The following packages will be UPDATED:

  libgfortran5                           12.2.0-he409387_32 --> 13.2.0-h2873a65_2

The following packages will be DOWNGRADED:

  libgfortran                      5.0.0-11_3_0_h97931a8_32 --> 5.0.0-13_2_0_h97931a8_2

[beckermr]

The build number decrease is considered a downgrade.