[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 beta for pr-78714
[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 beta
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "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" "+beta" "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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded uuid v0.6.1
[INFO] [stderr]   Downloaded context v1.0.1
[INFO] [stderr]   Downloaded coroutine v0.8.0
[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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0d297a7f8f4827e5597b6b45928e539fc42827cfbde65ae50512015c3c3326fc
[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" "0d297a7f8f4827e5597b6b45928e539fc42827cfbde65ae50512015c3c3326fc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0d297a7f8f4827e5597b6b45928e539fc42827cfbde65ae50512015c3c3326fc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0d297a7f8f4827e5597b6b45928e539fc42827cfbde65ae50512015c3c3326fc", kill_on_drop: false }`
[INFO] [stdout] 0d297a7f8f4827e5597b6b45928e539fc42827cfbde65ae50512015c3c3326fc
[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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 724bf48f0a7ed45fb364649833972ee212bf20d3192106085cdaa0c1e9fda3ef
[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" "724bf48f0a7ed45fb364649833972ee212bf20d3192106085cdaa0c1e9fda3ef", kill_on_drop: false }`
[INFO] [stderr]     Checking libc v0.2.39
[INFO] [stderr]    Compiling gcc v0.3.54
[INFO] [stderr]     Checking num-traits v0.2.2
[INFO] [stderr]     Checking readwrite-comp v0.0.1 (https://github.com/cheme/readwrite-comp.git#a7dd09c9)
[INFO] [stderr]     Checking serde v1.0.33
[INFO] [stderr]     Checking stable_deref_trait v1.0.0
[INFO] [stderr]     Checking smallvec v0.6.0
[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]     Checking log v0.4.1
[INFO] [stderr]    Compiling proc-macro2 v0.2.3
[INFO] [stderr]     Checking owning_ref v0.3.3
[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] [stderr]     Checking log v0.3.9
[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" "724bf48f0a7ed45fb364649833972ee212bf20d3192106085cdaa0c1e9fda3ef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "724bf48f0a7ed45fb364649833972ee212bf20d3192106085cdaa0c1e9fda3ef", kill_on_drop: false }`
[INFO] [stdout] 724bf48f0a7ed45fb364649833972ee212bf20d3192106085cdaa0c1e9fda3ef