[INFO] cloning repository https://github.com/ahmedraza90/Basic-Substrate
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ahmedraza90/Basic-Substrate" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fahmedraza90%2FBasic-Substrate", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fahmedraza90%2FBasic-Substrate'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 65623cf8d335c5cc2077b4277addd34216fc502d
[INFO] checking ahmedraza90/Basic-Substrate against try#901e6d56697c79b2e80df6a487b2318ec6f57ee3 for pr-142287
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fahmedraza90%2FBasic-Substrate" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ahmedraza90/Basic-Substrate on toolchain 901e6d56697c79b2e80df6a487b2318ec6f57ee3
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+901e6d56697c79b2e80df6a487b2318ec6f57ee3" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ahmedraza90/Basic-Substrate
[INFO] finished tweaking git repo https://github.com/ahmedraza90/Basic-Substrate
[INFO] tweaked toml for git repo https://github.com/ahmedraza90/Basic-Substrate written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/ahmedraza90/Basic-Substrate already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+901e6d56697c79b2e80df6a487b2318ec6f57ee3" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
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[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+901e6d56697c79b2e80df6a487b2318ec6f57ee3" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f4420c13111bc866e13cbccd6ec20054105e303808bf5ed96ce5eddf803d47bc
[INFO] running `Command { std: "docker" "start" "-a" "f4420c13111bc866e13cbccd6ec20054105e303808bf5ed96ce5eddf803d47bc", kill_on_drop: false }`
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[INFO] [stdout] 1876a911320fbe285f236db62bcdb6540033bf03ca58e324a356eefb132cd106
[INFO] running `Command { std: "docker" "start" "-a" "1876a911320fbe285f236db62bcdb6540033bf03ca58e324a356eefb132cd106", kill_on_drop: false }`
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[INFO] [stdout] error[E0515]: cannot return value referencing temporary value
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/trie-db-0.30.0/src/node.rs:324:3
[INFO] [stdout]     |
[INFO] [stdout] 324 |         self.0.iter().chain(iter::repeat(&None)).take(nibble_ops::NIBBLE_LENGTH)
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^----^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |         |                                 |
[INFO] [stdout]     |         |                                 temporary value created here
[INFO] [stdout]     |         returns a value referencing data owned by the current function
[INFO] [stdout]     |
[INFO] [stdout]     = help: use `.collect()` to allocate the iterator
[INFO] [stdout] 
[INFO] [stdout] 
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[INFO] [stdout] For more information about this error, try `rustc --explain E0515`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `trie-db` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "1876a911320fbe285f236db62bcdb6540033bf03ca58e324a356eefb132cd106", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1876a911320fbe285f236db62bcdb6540033bf03ca58e324a356eefb132cd106", kill_on_drop: false }`
[INFO] [stdout] 1876a911320fbe285f236db62bcdb6540033bf03ca58e324a356eefb132cd106