[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] checking cheme/tunnel against master#5e3f1b148db5bfa27fee52464ae1f5d34c49d77b for pr-75502
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcheme%2Ftunnel" "/workspace/builds/worker-2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/cheme/tunnel on toolchain 5e3f1b148db5bfa27fee52464ae1f5d34c49d77b
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5e3f1b148db5bfa27fee52464ae1f5d34c49d77b" "read-manifest" "--manifest-path" "Cargo.toml", 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-2/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" "+5e3f1b148db5bfa27fee52464ae1f5d34c49d77b" "fetch" "--locked" "--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-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+5e3f1b148db5bfa27fee52464ae1f5d34c49d77b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b1d366dcb55ea789128d62a627f0194164f244e225e1c2ef2fed177a52961a49
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "b1d366dcb55ea789128d62a627f0194164f244e225e1c2ef2fed177a52961a49", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b1d366dcb55ea789128d62a627f0194164f244e225e1c2ef2fed177a52961a49", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b1d366dcb55ea789128d62a627f0194164f244e225e1c2ef2fed177a52961a49", kill_on_drop: false }`
[INFO] [stdout] b1d366dcb55ea789128d62a627f0194164f244e225e1c2ef2fed177a52961a49
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+5e3f1b148db5bfa27fee52464ae1f5d34c49d77b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f2fbc2649b079079e9d8e50266c5a2faf7dffa77c5f94c4d47d40c38b988aacd
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "f2fbc2649b079079e9d8e50266c5a2faf7dffa77c5f94c4d47d40c38b988aacd", kill_on_drop: false }`
[INFO] [stderr]     Checking serde v1.0.33
[INFO] [stderr]     Checking readwrite-comp v0.0.1 (https://github.com/cheme/readwrite-comp.git#a7dd09c9)
[INFO] [stderr]     Checking futures v0.1.18
[INFO] [stderr]     Checking itoa v0.4.0
[INFO] [stderr]     Checking bit-vec v0.4.1 (https://github.com/cheme/bit-vec.git#084e672d)
[INFO] [stderr]     Checking uuid v0.6.1
[INFO] [stderr]    Compiling context v1.0.1
[INFO] [stderr]     Checking num_cpus v1.8.0
[INFO] [stderr]     Checking net2 v0.2.32
[INFO] [stderr]     Checking time v0.1.39
[INFO] [stderr]     Checking rand v0.3.22
[INFO] [stderr]     Checking parking_lot_core v0.2.13
[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`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "f2fbc2649b079079e9d8e50266c5a2faf7dffa77c5f94c4d47d40c38b988aacd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f2fbc2649b079079e9d8e50266c5a2faf7dffa77c5f94c4d47d40c38b988aacd", kill_on_drop: false }`
[INFO] [stdout] f2fbc2649b079079e9d8e50266c5a2faf7dffa77c5f94c4d47d40c38b988aacd