[INFO] fetching crate postcard-cobs 0.1.5-pre...
[INFO] checking postcard-cobs-0.1.5-pre against master#dfd7b8d03fb93d0e03147d28b3be6d93260fa94d for pr-87050
[INFO] extracting crate postcard-cobs 0.1.5-pre into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate postcard-cobs 0.1.5-pre on toolchain dfd7b8d03fb93d0e03147d28b3be6d93260fa94d
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate postcard-cobs 0.1.5-pre
[INFO] finished tweaking crates.io crate postcard-cobs 0.1.5-pre
[INFO] tweaked toml for crates.io crate postcard-cobs 0.1.5-pre written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5ff94c13023e9d97bb4d115df8c09a8a3a56ce80d5a12d9bf89aa1336063b4ed
[INFO] running `Command { std: "docker" "start" "-a" "5ff94c13023e9d97bb4d115df8c09a8a3a56ce80d5a12d9bf89aa1336063b4ed", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5ff94c13023e9d97bb4d115df8c09a8a3a56ce80d5a12d9bf89aa1336063b4ed", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5ff94c13023e9d97bb4d115df8c09a8a3a56ce80d5a12d9bf89aa1336063b4ed", kill_on_drop: false }`
[INFO] [stdout] 5ff94c13023e9d97bb4d115df8c09a8a3a56ce80d5a12d9bf89aa1336063b4ed
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 085bfa7330779ce536a69935730368e48ec6b9fc5b2876dc880b96a1ad18bf99
[INFO] running `Command { std: "docker" "start" "-a" "085bfa7330779ce536a69935730368e48ec6b9fc5b2876dc880b96a1ad18bf99", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.4.0
[INFO] [stderr]    Compiling libc v0.2.98
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling regex v0.2.11
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking ucd-util v0.1.8
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking utf8-ranges v1.0.4
[INFO] [stderr]     Checking postcard-cobs v0.1.5-pre (/opt/rustwide/workdir)
[INFO] [stderr]     Checking thread_local v0.3.6
[INFO] [stderr]     Checking regex-syntax v0.5.6
[INFO] [stderr]     Checking log v0.3.9
[INFO] [stderr]     Checking aho-corasick v0.6.10
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking rand v0.3.23
[INFO] [stderr]     Checking env_logger v0.4.3
[INFO] [stderr]     Checking quickcheck v0.5.0
[INFO] [stderr] error: could not compile `postcard-cobs`
[INFO] [stdout] error[E0463]: can't find crate for `cobs`
[INFO] [stdout]  --> tests/test.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | extern crate cobs;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stdout] For more information about this error, try `rustc --explain E0463`.
[INFO] [stdout] 
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "085bfa7330779ce536a69935730368e48ec6b9fc5b2876dc880b96a1ad18bf99", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "085bfa7330779ce536a69935730368e48ec6b9fc5b2876dc880b96a1ad18bf99", kill_on_drop: false }`
[INFO] [stdout] 085bfa7330779ce536a69935730368e48ec6b9fc5b2876dc880b96a1ad18bf99