[INFO] fetching crate sierra 0.6.0...
[INFO] checking sierra-0.6.0 against master#8424f8e8cdf07010967a57584fd647b30e930d4d for pr-120095
[INFO] extracting crate sierra 0.6.0 into /workspace/builds/worker-0-tc1/source
[INFO] validating manifest of crates.io crate sierra 0.6.0 on toolchain 8424f8e8cdf07010967a57584fd647b30e930d4d
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8424f8e8cdf07010967a57584fd647b30e930d4d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate sierra 0.6.0
[INFO] finished tweaking crates.io crate sierra 0.6.0
[INFO] tweaked toml for crates.io crate sierra 0.6.0 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8424f8e8cdf07010967a57584fd647b30e930d4d" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] Blocking waiting for file lock on package cache
[INFO] [stderr] Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8424f8e8cdf07010967a57584fd647b30e930d4d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] Blocking waiting for file lock on package cache
[INFO] [stderr] Downloading crates ...
[INFO] [stderr] warning: spurious network error (3 tries remaining): failed to get successful HTTP response from `https://crates.io/api/v1/crates/bitsetium/0.0.2/download` (99.84.160.114), got 503
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[INFO] [stderr] warning: spurious network error (3 tries remaining): failed to get successful HTTP response from `https://crates.io/api/v1/crates/sierra-proc/0.6.0/download` (99.84.160.114), got 503
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[INFO] [stderr] warning: spurious network error (3 tries remaining): failed to get successful HTTP response from `https://crates.io/api/v1/crates/gpu-descriptor-erupt/0.4.0/download` (99.84.160.114), got 503
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[INFO] [stderr] warning: spurious network error (3 tries remaining): failed to get successful HTTP response from `https://crates.io/api/v1/crates/gpu-alloc-erupt/0.8.0/download` (99.84.160.114), got 503
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[INFO] [stderr] warning: spurious network error (3 tries remaining): failed to get successful HTTP response from `https://crates.io/api/v1/crates/moltenvk-sys/0.1.2/download` (99.84.160.114), got 503
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[INFO] [stderr] warning: spurious network error (3 tries remaining): failed to get successful HTTP response from `https://crates.io/api/v1/crates/proc-easy/0.2.3/download` (99.84.160.114), got 503
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[INFO] [stderr] Downloaded erupt v0.23.0+213
[INFO] [stderr] Downloaded scoped-arena v0.4.1
[INFO] [stderr] warning: spurious network error (2 tries remaining): failed to get successful HTTP response from `https://crates.io/api/v1/crates/gpu-alloc-erupt/0.8.0/download` (99.84.160.114), got 503
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[INFO] [stderr] warning: spurious network error (2 tries remaining): failed to get successful HTTP response from `https://crates.io/api/v1/crates/gpu-descriptor-erupt/0.4.0/download` (99.84.160.114), got 503
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[INFO] [stderr] warning: spurious network error (2 tries remaining): failed to get successful HTTP response from `https://crates.io/api/v1/crates/proc-easy/0.2.3/download` (99.84.160.114), got 503
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[INFO] [stderr] Downloaded array-fu v0.0.1-alpha
[INFO] [stderr] Downloaded raw-window-metal v0.3.2
[INFO] [stderr] warning: spurious network error (1 tries remaining): failed to get successful HTTP response from `https://crates.io/api/v1/crates/proc-easy/0.2.3/download` (99.84.160.114), got 503
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[INFO] [stderr] warning: spurious network error (1 tries remaining): failed to get successful HTTP response from `https://crates.io/api/v1/crates/gpu-descriptor-erupt/0.4.0/download` (99.84.160.114), got 503
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[INFO] [stderr] Downloaded bitsetium v0.0.2
[INFO] [stderr] Downloaded moltenvk-sys v0.1.2
[INFO] [stderr] Downloaded gpu-alloc-erupt v0.8.0
[INFO] [stderr] Downloaded sierra-proc v0.6.0
[INFO] [stderr] error: failed to download from `https://crates.io/api/v1/crates/gpu-descriptor-erupt/0.4.0/download`
[INFO] [stderr]
[INFO] [stderr] Caused by:
[INFO] [stderr] failed to get successful HTTP response from `https://crates.io/api/v1/crates/gpu-descriptor-erupt/0.4.0/download` (99.84.160.114), got 503
[INFO] [stderr] debug headers:
[INFO] [stderr] x-cache: Error from cloudfront
[INFO] [stderr] x-amz-cf-pop: ORD52-C2
[INFO] [stderr] x-amz-cf-id: _J8AjcVPhMSI7w6qRdV9r9LXdFn3zAfj1rVCscT6k3eKV9MlJeIy9w==
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[ERROR] this task or one of its parent failed!
[ERROR] command failed: exit status: 101
[ERROR] note: run with `RUST_BACKTRACE=1` to display a backtrace.