No GPG found when building Swift

[xis19]

This step occasionally fails for unknown reasons. Rebuilding everything sometimes fixes the issue for unknown reasons.

Step 47/48 : RUN if [ ! "$(uname -m)" == "aarch64" ]; then         set -e;         export $(curl -s ${SWIFT_WEBROOT}/latest-build.yml | grep 'download:' | sed 's/:[^:\/\/]/=/g')          && export $(curl -s ${SWIFT_WEBROOT}/latest-build.yml | grep 'download_signature:' | sed 's/:[^:\/\/]/=/g')          && export DOWNLOAD_DIR=$(echo $download | sed "s/-${OS_VER}.tar.gz//g")         && echo $DOWNLOAD_DIR > .swift_tag         && export GNUPGHOME="$(mktemp -d)"         && curl -fL ${SWIFT_WEBROOT}/${DOWNLOAD_DIR}/${download} -o latest_toolchain.tar.gz         ${SWIFT_WEBROOT}/${DOWNLOAD_DIR}/${download_signature} -o latest_toolchain.tar.gz.sig         && curl -fL https://swift.org/keys/all-keys.asc | gpg --import -          && gpg --batch --verify latest_toolchain.tar.gz.sig latest_toolchain.tar.gz         && tar -xzf latest_toolchain.tar.gz --directory / --strip-components=1         && chmod -R o+r /usr/lib/swift         && rm -rf "$GNUPGHOME" latest_toolchain.tar.gz.sig latest_toolchain.tar.gz;     fi
 ---> Running in a158ee48729a
�[91m  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
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100  612M  100  612M    0     0  31.5M      0  0:00:19  0:00:19 --:--:-- 39.1M
�[0m�[91m
100   833  100   833    0     0   4881      0 --:--:-- --:--:-- --:--:--  4881
�[0m�[91m  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
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  0     0    0     0    0�[0m�[91m     0      0    �[0m�[91m  0 -�[0m�[91m-:--:--�[0m�[91m --:--:�[0m�[91m-- --:�[0m�[91m--:-- �[0m�[91m    0�[0m�[91mgpg: keyring `/tmp/tmp.aNUBOk4shq/secring.gpg' created
�[0m�[91mgpg: keyring `/tmp/tmp.aNUBOk4shq/pubring.gpg' created
�[0m�[91m
100   257  100   257    0     0   1492      0 �[0m�[91m--:--:-- --:--:-�[0m�[91m- --:--�[0m�[91m:--  1494�[0m�[91m
�[0m�[91m
  0  9845    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0�[0m�[91m
100  9845  100  9845    0     0  12527      0 --:--:-- --:--:-- --:--:-- 2403k
�[0m�[91mgpg: no valid OpenPGP data found.
gpg: Total number processed: 0
�[0mThe command '/bin/sh -c if [ ! "$(uname -m)" == "aarch64" ]; then         set -e;         export $(curl -s ${SWIFT_WEBROOT}/latest-build.yml | grep 'download:' | sed 's/:[^:\/\/]/=/g')          && export $(curl -s ${SWIFT_WEBROOT}/latest-build.yml | grep 'download_signature:' | sed 's/:[^:\/\/]/=/g')          && export DOWNLOAD_DIR=$(echo $download | sed "s/-${OS_VER}.tar.gz//g")         && echo $DOWNLOAD_DIR > .swift_tag         && export GNUPGHOME="$(mktemp -d)"         && curl -fL ${SWIFT_WEBROOT}/${DOWNLOAD_DIR}/${download} -o latest_toolchain.tar.gz         ${SWIFT_WEBROOT}/${DOWNLOAD_DIR}/${download_signature} -o latest_toolchain.tar.gz.sig         && curl -fL https://swift.org/keys/all-keys.asc | gpg --import -          && gpg --batch --verify latest_toolchain.tar.gz.sig latest_toolchain.tar.gz         && tar -xzf latest_toolchain.tar.gz --directory / --strip-components=1         && chmod -R o+r /usr/lib/swift         && rm -rf "$GNUPGHOME" latest_toolchain.tar.gz.sig latest_toolchain.tar.gz;     fi' returned a non-zero code: 2