`env export --from-history` fails with a JSON parse error on history entries with comma-range specs (regression in 2.9.0)

[mathbunnyru]

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

comma

Latest version of Mamba

• My problem is not solved with the latest version

Tried in Conda?

I didn't try

Describe your issue

$ mamba --version
2.8.1
$ mamba install --yes 'ripgrep>=14,<20'
$ grep 'update specs' /opt/conda/conda-meta/history | tail -1
# update specs: ["ripgrep[version=\">=14,<20\"]"]
$ mamba env export --no-build --json --from-history >/dev/null; echo $?
0
$ mamba install --yes 'mamba=2.9.0'
$ mamba env export --no-build --json --from-history >/dev/null; echo $?
1

mamba info / micromamba info

reproduced on linux-aarch64; our CI hit the same failure on linux-64

       libmamba version : 2.9.0
          mamba version : 2.9.0
           curl version : libcurl/8.21.0 OpenSSL/3.6.3 zlib/1.3.2 zstd/1.5.7 libpsl/0.23.0 libssh2/1.11.1 nghttp2/1.68.1 mit-krb5/1.22.2
     libarchive version : libarchive 3.8.9 zlib/1.3.2 liblzma/5.8.3 bz2lib/1.0.8 liblz4/1.10.0 libzstd/1.5.7 liblzo2/2.10 openssl/3.5.7 libb2/bundled
       envs directories : /opt/conda/envs
          package cache : /opt/conda/pkgs
                          /home/jovyan/.mamba/pkgs
            environment : base
           env location : /opt/conda
      user config files : /home/jovyan/.mambarc
 populated config files : /opt/conda/.condarc
       virtual packages : __unix=0=0
                          __linux=6.12.76=0
                          __glibc=2.39=0
                          __archspec=1=aarch64
               channels : https://conda.anaconda.org/conda-forge/linux-aarch64
                          https://conda.anaconda.org/conda-forge/noarch
       base environment : /opt/conda
               platform : linux-aarch64

Logs

{
    "log_history": [
        {
            "level": "critical",
            "location": "/home/conda/feedstock_root/build_artifacts/bld/rattler-build_mamba_1786125681/work/micromamba/src/main.cpp:235:9 int main(int, char**)",
            "message": "[json.exception.parse_error.101] parse error at line 6, column 23: syntax error while parsing array - invalid literal; last read: '\"ripgrep[version=\">'; expected ']'",
            "source": "libmamba"
        }
    ]
}

environment.yml

~/.condarc