BUG: failure to unpack empty archive #5854
Description
Checklist
- I added a descriptive title
- I searched open reports and couldn't find a duplicate
What happened?
In conda-forge/linux-sysroot-feedstock#93, I've tried switching our RPMs from Alma to Rocky Linux, and it turns out I ended up downloading an RPM that's empty (though with the correct hash).
$ curl -LO https://dl.rockylinux.org/pub/rocky/10.0/BaseOS/x86_64/os/Packages/k/kernel-6.12.0-55.41.1.el10_0.x86_64.rpm
$ rpm -qlp kernel-6.12.0-55.41.1.el10_0.x86_64.rpm
warning: kernel-6.12.0-55.41.1.el10_0.x86_64.rpm: Header V4 RSA/SHA256 Signature, key ID 6fedfc85: NOKEY
(contains no files)However, conda-build falls over on that
Downloading https://dl.rockylinux.org/pub/rocky/10.0/BaseOS/x86_64/os/Packages/k/kernel-6.12.0-55.41.1.el10_0.x86_64.rpm
Extracting download
Traceback (most recent call last):
File "/opt/conda/bin/conda-build", line 11, in <module>
sys.exit(execute())
^^^^^^^^^
File "/opt/conda/lib/python3.12/site-packages/conda_build/cli/main_build.py", line 622, in execute
api.build(
File "/opt/conda/lib/python3.12/site-packages/conda_build/api.py", line 211, in build
return build_tree(
^^^^^^^^^^^
File "/opt/conda/lib/python3.12/site-packages/conda_build/build.py", line 3669, in build_tree
packages_from_this = build(
^^^^^^
File "/opt/conda/lib/python3.12/site-packages/conda_build/build.py", line 2461, in build
try_download(m, no_download_source=False, raise_error=True)
File "/opt/conda/lib/python3.12/site-packages/conda_build/render.py", line 835, in try_download
source.provide(metadata)
File "/opt/conda/lib/python3.12/site-packages/conda_build/source.py", line 1041, in provide
unpack(
File "/opt/conda/lib/python3.12/site-packages/conda_build/source.py", line 197, in unpack
folder = os.path.join(tmpdir, flist[0])
~~~~~^^^
IndexError: list index out of range
Conda Info
Details
++ conda info
active environment : base
active env location : /opt/conda
shell level : 1
user config file : /home/conda/.condarc
populated config files : /opt/conda/.condarc
/home/conda/.condarc
conda version : 25.9.1
conda-build version : 25.9.0
python version : 3.12.12.final.0
solver : libmamba (default)
virtual packages : __archspec=1=zen2
__conda=25.9.1=0
__glibc=2.39=0
__linux=6.11.0=0
__unix=0=0
base environment : /opt/conda (writable)
conda av data dir : /opt/conda/etc/conda
conda av metadata url : None
channel URLs : https://conda.anaconda.org/conda-forge/linux-64
https://conda.anaconda.org/conda-forge/noarch
package cache : /home/conda/feedstock_root/build_artifacts/pkg_cache
/opt/conda/pkgs
envs directories : /opt/conda/envs
/home/conda/.conda/envs
platform : linux-64
user-agent : conda/25.9.1 requests/2.32.5 CPython/3.12.12 Linux/6.11.0-1018-azure almalinux/10.0 glibc/2.39 solver/libmamba conda-libmamba-solver/25.4.0 libmambapy/2.3.3
UID:GID : 1001:1001
netrc file : None
offline mode : FalseConda Config
Details
++ conda config --env --show-sources
==> /opt/conda/.condarc <==
add_pip_as_python_dependency: False
auto_update_conda: False
aggressive_update_packages:
- ca-certificates
- certifi
channel_priority: strict
channels:
- conda-forge
show_channel_urls: True
conda_build:
pkg_format: 2
zstd_compression_level: 19
==> /home/conda/.condarc <==
pkgs_dirs:
- /home/conda/feedstock_root/build_artifacts/pkg_cache
- /opt/conda/pkgs
solver: libmamba
conda-build:
root-dir: /home/conda/feedstock_root/build_artifacts
==> envvars <==
allow_softlinks: False
bld_path: /home/conda/feedstock_root/build_artifactsConda list
Details
++ conda list --show-channel-urls
# packages in environment at /opt/conda:
#
# Name Version Build Channel
_libgcc_mutex 0.1 conda_forge conda-forge
_openmp_mutex 4.5 2_gnu conda-forge
anaconda-cli-base 0.6.0 pyhd8ed1ab_0 conda-forge
anaconda-client 1.13.0 pyh29332c3_1 conda-forge
annotated-types 0.7.0 pyhd8ed1ab_1 conda-forge
archspec 0.2.5 pyhd8ed1ab_0 conda-forge
attrs 25.4.0 pyh71513ae_0 conda-forge
beautifulsoup4 4.14.2 pyha770c72_0 conda-forge
boltons 25.0.0 pyhd8ed1ab_0 conda-forge
brotli-python 1.2.0 py312h67db365_0 conda-forge
bzip2 1.0.8 hda65f42_8 conda-forge
c-ares 1.34.5 hb9d3cd8_0 conda-forge
ca-certificates 2025.11.12 hbd8a1cb_0 conda-forge
certifi 2025.11.12 pyhd8ed1ab_0 conda-forge
cffi 2.0.0 py312h460c074_1 conda-forge
chardet 5.2.0 pyhd8ed1ab_3 conda-forge
charset-normalizer 3.4.4 pyhd8ed1ab_0 conda-forge
click 8.1.8 pyh707e725_0 conda-forge
colorama 0.4.6 pyhd8ed1ab_1 conda-forge
conda 25.9.1 py312h7900ff3_0 conda-forge
conda-build 25.9.0 py312ha128529_1 conda-forge
conda-env 2.6.0 1 conda-forge
conda-forge-ci-setup 4.23.1 py312hef7310e_100 conda-forge
conda-forge-metadata 0.12.0 pyhcf101f3_1 conda-forge
conda-index 0.7.0 pyhd8ed1ab_0 conda-forge
conda-libmamba-solver 25.4.0 pyhd8ed1ab_0 conda-forge
conda-oci-mirror 0.2.3 pyhd8ed1ab_0 conda-forge
conda-package-handling 2.4.0 pyh7900ff3_2 conda-forge
conda-package-streaming 0.12.0 pyhd8ed1ab_0 conda-forge
cpp-expected 1.3.1 h171cf75_0 conda-forge
defusedxml 0.7.1 pyhd8ed1ab_0 conda-forge
deprecated 1.3.1 pyhd8ed1ab_0 conda-forge
distro 1.9.0 pyhd8ed1ab_1 conda-forge
evalidate 2.0.5 pyhe01879c_0 conda-forge
filelock 3.20.0 pyhd8ed1ab_0 conda-forge
fmt 12.0.0 h2b0788b_0 conda-forge
frozendict 2.4.7 py312h4c3975b_0 conda-forge
git 2.51.2 pl5321h28be001_0 conda-forge
h2 4.3.0 pyhcf101f3_0 conda-forge
hpack 4.1.0 pyhd8ed1ab_0 conda-forge
hyperframe 6.1.0 pyhd8ed1ab_0 conda-forge
icu 75.1 he02047a_0 conda-forge
idna 3.11 pyhd8ed1ab_0 conda-forge
jinja2 3.1.6 pyhd8ed1ab_0 conda-forge
joblib 1.5.2 pyhd8ed1ab_0 conda-forge
jq 1.8.1 h73b1eb8_0 conda-forge
jsonpatch 1.33 pyhd8ed1ab_1 conda-forge
jsonpointer 3.0.0 py312h7900ff3_2 conda-forge
jsonschema 4.25.1 pyhe01879c_0 conda-forge
jsonschema-specifications 2025.9.1 pyhcf101f3_0 conda-forge
jupyter_core 5.9.1 pyhc90fa1f_0 conda-forge
keyutils 1.6.3 hb9d3cd8_0 conda-forge
krb5 1.21.3 h659f571_0 conda-forge
lcms2 2.17 h717163a_0 conda-forge
ld_impl_linux-64 2.45 h1aa0949_0 conda-forge
lerc 4.0.0 h0aef613_1 conda-forge
libarchive 3.8.2 gpl_h7be2006_100 conda-forge
libcurl 8.17.0 h4e3cde8_0 conda-forge
libdeflate 1.25 h17f619e_0 conda-forge
libedit 3.1.20250104 pl5321h7949ede_0 conda-forge
libev 4.33 hd590300_2 conda-forge
libexpat 2.7.1 hecca717_0 conda-forge
libffi 3.5.2 h9ec8514_0 conda-forge
libfreetype 2.14.1 ha770c72_0 conda-forge
libfreetype6 2.14.1 h73754d4_0 conda-forge
libgcc 15.2.0 h767d61c_7 conda-forge
libgcc-ng 15.2.0 h69a702a_7 conda-forge
libgomp 15.2.0 h767d61c_7 conda-forge
libiconv 1.18 h3b78370_2 conda-forge
libjpeg-turbo 3.1.2 hb03c661_0 conda-forge
liblief 0.16.6 hecca717_1 conda-forge
liblzma 5.8.1 hb9d3cd8_2 conda-forge
liblzma-devel 5.8.1 hb9d3cd8_2 conda-forge
libmamba 2.3.3 h09abcb8_1 conda-forge
libmambapy 2.3.3 py312h9b917ee_1 conda-forge
libnghttp2 1.67.0 had1ee68_0 conda-forge
libnsl 2.0.1 hb9d3cd8_1 conda-forge
libpng 1.6.50 h421ea60_1 conda-forge
libsolv 0.7.35 h9463b59_0 conda-forge
libsqlite 3.51.0 hee844dc_0 conda-forge
libssh2 1.11.1 hcf80075_0 conda-forge
libstdcxx 15.2.0 h8f9b012_7 conda-forge
libstdcxx-ng 15.2.0 h4852527_7 conda-forge
libtiff 4.7.1 h9d88235_1 conda-forge
libuuid 2.41.2 he9a06e4_0 conda-forge
libwebp-base 1.6.0 hd42ef1d_0 conda-forge
libxcb 1.17.0 h8a09558_0 conda-forge
libxcrypt 4.4.36 hd590300_1 conda-forge
libxml2 2.15.1 h26afc86_0 conda-forge
libxml2-16 2.15.1 ha9997c6_0 conda-forge
libzlib 1.3.1 hb9d3cd8_2 conda-forge
lz4-c 1.10.0 h5888daf_1 conda-forge
lzo 2.10 h280c20c_1002 conda-forge
mamba 2.3.3 heaf8479_1 conda-forge
markdown-it-py 4.0.0 pyhd8ed1ab_0 conda-forge
markupsafe 3.0.3 py312h8a5da7c_0 conda-forge
mbedtls 3.6.3.1 h5888daf_0 conda-forge
mdurl 0.1.2 pyhd8ed1ab_1 conda-forge
menuinst 2.4.1 py312h7900ff3_0 conda-forge
msgpack-python 1.1.2 py312hd9148b4_1 conda-forge
nbformat 5.10.4 pyhd8ed1ab_1 conda-forge
ncurses 6.5 h2d0b736_3 conda-forge
nlohmann_json-abi 3.12.0 h0f90c79_1 conda-forge
oniguruma 6.9.10 hb9d3cd8_0 conda-forge
openjpeg 2.5.4 h55fea9a_0 conda-forge
openssl 3.6.0 h26f9b46_0 conda-forge
oras-py 0.1.14 pyhd8ed1ab_0 conda-forge
packaging 25.0 pyh29332c3_1 conda-forge
patch 2.8 hb03c661_1002 conda-forge
patchelf 0.17.2 h58526e2_0 conda-forge
pcre2 10.46 h1321c63_0 conda-forge
perl 5.32.1 7_hd590300_perl5 conda-forge
pillow 12.0.0 py312h0889fd4_0 conda-forge
pip 25.3 pyh8b19718_0 conda-forge
pixi 0.59.0 ha759004_0 conda-forge
pkginfo 1.12.1.2 pyhd8ed1ab_0 conda-forge
platformdirs 4.5.0 pyhcf101f3_0 conda-forge
pluggy 1.6.0 pyhd8ed1ab_0 conda-forge
psutil 7.1.3 py312h5253ce2_0 conda-forge
pthread-stubs 0.4 hb9d3cd8_1002 conda-forge
py-lief 0.16.6 py312h1289d80_1 conda-forge
pybind11-abi 4 hd8ed1ab_3 conda-forge
pycosat 0.6.6 py312h4c3975b_3 conda-forge
pycparser 2.22 pyh29332c3_1 conda-forge
pydantic 2.12.4 pyh3cfb1c2_0 conda-forge
pydantic-core 2.41.5 py312h868fb18_1 conda-forge
pydantic-settings 2.12.0 pyh3cfb1c2_0 conda-forge
pygments 2.19.2 pyhd8ed1ab_0 conda-forge
pysocks 1.7.1 pyha55dd90_7 conda-forge
python 3.12.12 hd63d673_1_cpython conda-forge
python-dateutil 2.9.0.post0 pyhe01879c_2 conda-forge
python-dotenv 1.2.1 pyhcf101f3_0 conda-forge
python-fastjsonschema 2.21.2 pyhe01879c_0 conda-forge
python-libarchive-c 5.3 pyhe01879c_1 conda-forge
python_abi 3.12 8_cp312 conda-forge
pytz 2025.2 pyhd8ed1ab_0 conda-forge
pyyaml 6.0.3 py312h8a5da7c_0 conda-forge
rattler-build 0.49.0 he64ecbb_0 conda-forge
rattler-build-conda-compat 1.4.9 pyhd8ed1ab_0 conda-forge
readchar 4.2.1 pyhe01879c_0 conda-forge
readline 8.2 h8c095d6_2 conda-forge
referencing 0.37.0 pyhcf101f3_0 conda-forge
reproc 14.2.5.post0 hb9d3cd8_0 conda-forge
reproc-cpp 14.2.5.post0 h5888daf_0 conda-forge
requests 2.32.5 pyhd8ed1ab_0 conda-forge
requests-toolbelt 1.0.0 pyhd8ed1ab_1 conda-forge
rich 14.2.0 pyhcf101f3_0 conda-forge
ripgrep 15.1.0 hdab8a38_0 conda-forge
rpds-py 0.28.0 py312h868fb18_2 conda-forge
ruamel.yaml 0.18.16 py312h4c3975b_0 conda-forge
ruamel.yaml.clib 0.2.14 py312h4c3975b_0 conda-forge
setuptools 80.9.0 pyhff2d567_0 conda-forge
shellingham 1.5.4 pyhd8ed1ab_2 conda-forge
shyaml 0.6.2 pyhd3deb0d_0 conda-forge
simdjson 4.0.7 hb700be7_0 conda-forge
six 1.17.0 pyhe01879c_1 conda-forge
soupsieve 2.8 pyhd8ed1ab_0 conda-forge
su-exec 0.2 h166bdaf_1003 conda-forge
tini 0.19.0 h166bdaf_1 conda-forge
tk 8.6.13 noxft_ha0e22de_103 conda-forge
tomli 2.3.0 pyhcf101f3_0 conda-forge
tqdm 4.67.1 pyhd8ed1ab_1 conda-forge
traitlets 5.14.3 pyhd8ed1ab_1 conda-forge
truststore 0.10.3 pyhe01879c_0 conda-forge
typer 0.20.0 pyhefaf540_1 conda-forge
typer-slim 0.20.0 pyhcf101f3_1 conda-forge
typer-slim-standard 0.20.0 h4daf872_1 conda-forge
typing-extensions 4.15.0 h396c80c_0 conda-forge
typing-inspection 0.4.2 pyhd8ed1ab_0 conda-forge
typing_extensions 4.15.0 pyhcf101f3_0 conda-forge
tzdata 2025b h78e105d_0 conda-forge
urllib3 2.5.0 pyhd8ed1ab_0 conda-forge
wheel 0.45.1 pyhd8ed1ab_1 conda-forge
wrapt 1.17.3 py312h4c3975b_1 conda-forge
xorg-libxau 1.0.12 hb03c661_1 conda-forge
xorg-libxdmcp 1.1.5 hb03c661_1 conda-forge
xz 5.8.1 hbcc6ac9_2 conda-forge
xz-gpl-tools 5.8.1 hbcc6ac9_2 conda-forge
xz-tools 5.8.1 hb9d3cd8_2 conda-forge
yaml 0.2.5 h280c20c_3 conda-forge
yaml-cpp 0.8.0 h59595ed_0 conda-forge
zlib-ng 2.2.5 hde8ca8f_0 conda-forge
zstandard 0.25.0 py312h5253ce2_1 conda-forge
zstd 1.5.7 hb8e6e7a_2 conda-forgeAdditional Context
No response