mamba create --json produces no output for empty environment

[maresb]

Troubleshooting docs

• My problem is not solved in the Troubleshooting docs

Anaconda default channels

• I do NOT use the Anaconda default channels (pkgs/* etc.)

How did you install Mamba?

Micromamba

Search tried in issue tracker

--json

Latest version of Mamba

• My problem is not solved with the latest version

Tried in Conda?

I do not have this problem with Conda, just with Mamba

Describe your issue

The following produces no output:

mamba create --prefix /tmp/blah --json --dry-run

I expect output similar to conda's:

{
  "actions": {
    "FETCH": [],
    "PREFIX": "/tmp/blah"
  },
  "dry_run": true,
  "prefix": "/tmp/blah",
  "success": true
}

mamba info / micromamba info

libmamba version : 2.0.2
          mamba version : 2.0.2
           curl version : libcurl/8.10.1 OpenSSL/3.3.2 zlib/1.3.1 zstd/1.5.6 libssh2/1.11.0 nghttp2/1.64.0
     libarchive version : libarchive 3.7.4 zlib/1.2.13 liblzma/5.2.6 bz2lib/1.0.8 liblz4/1.9.3 libzstd/1.5.6
       envs directories : ~/micromamba/envs
          package cache : ~/micromamba/pkgs
                          ~/.mamba/pkgs
            environment : conda-lock-dev (active)
           env location : ~/micromamba/envs/conda-lock-dev
      user config files : ~/.mambarc
 populated config files : ~/.condarc
       virtual packages : __unix=0=0
                          __linux=5.15.0=0
                          __glibc=2.31=0
                          __archspec=1=x86_64_v3
               channels : https://conda.anaconda.org/conda-forge/linux-64
                          https://conda.anaconda.org/conda-forge/noarch
                          https://conda.anaconda.org/nodefaults/linux-64
                          https://conda.anaconda.org/nodefaults/noarch
       base environment : ~/micromamba
               platform : linux-64

Logs

No response

environment.yml

No response

~/.condarc

No response

[maresb]

This seems very similar to #3582

[mathbunnyru]

I'm sorry, I accidentally put fix: https://github.com/mamba-org/mamba/issues/3583 to the description of my PR (I copied the wrong link).
And when my PR was merged, this issue was automatically wrongly closed.

Please, reopen this issue @jjerphan @maresb