[INFO] cloning repository https://github.com/cheme/tunnel
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/cheme/tunnel" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcheme%2Ftunnel", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcheme%2Ftunnel'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c695e507295424520f56d62841574c321ccb8cea
[INFO] testing cheme/tunnel against 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcheme%2Ftunnel" "/workspace/builds/worker-55/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-55/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/cheme/tunnel on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/cheme/tunnel
[INFO] finished tweaking git repo https://github.com/cheme/tunnel
[INFO] tweaked toml for git repo https://github.com/cheme/tunnel written to /workspace/builds/worker-55/source/Cargo.toml
[INFO] crate git repo https://github.com/cheme/tunnel already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "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-55/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-55/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6e250783cf447093e58b3473d820edbcc6d21eea2c225df8c2f2a6477c0a7aa1
[INFO] running `Command { std: "docker" "start" "-a" "6e250783cf447093e58b3473d820edbcc6d21eea2c225df8c2f2a6477c0a7aa1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6e250783cf447093e58b3473d820edbcc6d21eea2c225df8c2f2a6477c0a7aa1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6e250783cf447093e58b3473d820edbcc6d21eea2c225df8c2f2a6477c0a7aa1", kill_on_drop: false }`
[INFO] [stdout] 6e250783cf447093e58b3473d820edbcc6d21eea2c225df8c2f2a6477c0a7aa1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-55/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-55/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9dd43342fbe454da185d322937615606d5dad8fc4a93dc20ff6affc6d8ddb955
[INFO] running `Command { std: "docker" "start" "-a" "9dd43342fbe454da185d322937615606d5dad8fc4a93dc20ff6affc6d8ddb955", kill_on_drop: false }`
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling cfg-if v0.1.2
[INFO] [stderr]    Compiling libc v0.2.39
[INFO] [stderr]    Compiling num-traits v0.2.2
[INFO] [stderr]    Compiling byteorder v1.1.0
[INFO] [stderr]    Compiling serde v1.0.33
[INFO] [stderr]    Compiling readwrite-comp v0.0.1 (https://github.com/cheme/readwrite-comp.git#a7dd09c9)
[INFO] [stderr]    Compiling log v0.4.1
[INFO] [stderr]    Compiling proc-macro2 v0.2.3
[INFO] [stdout] error[E0713]: borrow may still be in use when destructor runs
[INFO] [stdout]    --> /opt/rustwide/cargo-home/git/checkouts/readwrite-comp-98a72d5ffd3148ea/a7dd09c/readwrite-comp/src/lib.rs:369:9
[INFO] [stdout]     |
[INFO] [stdout] 353 | impl<'a, 'b, W : 'a + Write, EW : 'b + ExtWrite> CompW<'a,'b,W,EW> {
[INFO] [stdout]     |          -- lifetime `'b` defined here
[INFO] [stdout] ...
[INFO] [stdout] 369 |     Ok((self.1,self.2.clone()))
[INFO] [stdout]     |     ----^^^^^^----------------- returning this value requires that `*self.1` is borrowed for `'b`
[INFO] [stdout] 370 |   }
[INFO] [stdout]     |   - here, drop of `self` needs exclusive access to `*self.1`, because the type `CompW<'_, '_, W, EW>` implements the `Drop` trait
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0713]: borrow may still be in use when destructor runs
[INFO] [stdout]    --> /opt/rustwide/cargo-home/git/checkouts/readwrite-comp-98a72d5ffd3148ea/a7dd09c/readwrite-comp/src/lib.rs:436:9
[INFO] [stdout]     |
[INFO] [stdout] 422 | impl<'a, 'b, R : 'a + Read, ER : 'b + ExtRead> CompR<'a,'b,R,ER> {
[INFO] [stdout]     |          -- lifetime `'b` defined here
[INFO] [stdout] ...
[INFO] [stdout] 436 |     Ok((self.1,self.2.clone()))
[INFO] [stdout]     |     ----^^^^^^----------------- returning this value requires that `*self.1` is borrowed for `'b`
[INFO] [stdout] 437 |   }
[INFO] [stdout]     |   - here, drop of `self` needs exclusive access to `*self.1`, because the type `CompR<'_, '_, R, ER>` implements the `Drop` trait
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0713`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `readwrite-comp` due to 3 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "9dd43342fbe454da185d322937615606d5dad8fc4a93dc20ff6affc6d8ddb955", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9dd43342fbe454da185d322937615606d5dad8fc4a93dc20ff6affc6d8ddb955", kill_on_drop: false }`
[INFO] [stdout] 9dd43342fbe454da185d322937615606d5dad8fc4a93dc20ff6affc6d8ddb955