[INFO] fetching crate tom 0.0.1...
[INFO] testing tom-0.0.1 against beta-2020-10-09 for beta-1.48-1
[INFO] extracting crate tom 0.0.1 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate tom 0.0.1 on toolchain beta-2020-10-09
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-9/source/.cargo/config
[INFO] started tweaking crates.io crate tom 0.0.1
[INFO] finished tweaking crates.io crate tom 0.0.1
[INFO] tweaked toml for crates.io crate tom 0.0.1 written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded string-interner v0.6.4
[INFO] [stderr]   Downloaded text_unit v0.1.10
[INFO] [stderr]   Downloaded m_lexer v0.0.4
[INFO] [stderr]   Downloaded failure v0.1.8
[INFO] [stderr]   Downloaded failure_derive v0.1.8
[INFO] [stderr]   Downloaded synstructure v0.12.4
[INFO] [stderr]   Downloaded itertools v0.7.11
[INFO] [stderr]   Downloaded uncover v0.1.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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-2020-10-09" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6639684ce541c92f7339ba5c26f201c97a901f96c8588f30528fb67696bfafb6
[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" "6639684ce541c92f7339ba5c26f201c97a901f96c8588f30528fb67696bfafb6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6639684ce541c92f7339ba5c26f201c97a901f96c8588f30528fb67696bfafb6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6639684ce541c92f7339ba5c26f201c97a901f96c8588f30528fb67696bfafb6", kill_on_drop: false }`
[INFO] [stdout] 6639684ce541c92f7339ba5c26f201c97a901f96c8588f30528fb67696bfafb6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-10-09" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] deb72ac597b9e0a50fd163e41e20b8b0b9a5a0a92d6818e5d37a4f7ab7d9c51f
[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" "deb72ac597b9e0a50fd163e41e20b8b0b9a5a0a92d6818e5d37a4f7ab7d9c51f", kill_on_drop: false }`
[INFO] [stderr]    Compiling text_unit v0.1.10
[INFO] [stderr]    Compiling uncover v0.1.1
[INFO] [stderr]    Compiling itertools v0.7.11
[INFO] [stderr]    Compiling m_lexer v0.0.4
[INFO] [stderr]    Compiling string-interner v0.6.4
[INFO] [stderr]    Compiling tom v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> src/visitor.rs:5:24
[INFO] [stdout]   |
[INFO] [stdout] 5 |     callbacks: Vec<Box<FnMut(&mut C, CstNode, &TomlDoc) + 'c>>,
[INFO] [stdout]   |                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn FnMut(&mut C, CstNode, &TomlDoc) + 'c`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/visitor.rs:29:21
[INFO] [stdout]    |
[INFO] [stdout] 29 |         let cb: Box<FnMut(&mut C, CstNode, &TomlDoc) + 'c> =
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn FnMut(&mut C, CstNode, &TomlDoc) + 'c`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]    --> src/lib.rs:168:25
[INFO] [stdout]     |
[INFO] [stdout] 168 |                     len += (text.len() as u32).into();
[INFO] [stdout]     |                         ^^ -------------------------- this method call resolves to `T`
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         cannot infer type
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0282`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `tom`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "deb72ac597b9e0a50fd163e41e20b8b0b9a5a0a92d6818e5d37a4f7ab7d9c51f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "deb72ac597b9e0a50fd163e41e20b8b0b9a5a0a92d6818e5d37a4f7ab7d9c51f", kill_on_drop: false }`
[INFO] [stdout] deb72ac597b9e0a50fd163e41e20b8b0b9a5a0a92d6818e5d37a4f7ab7d9c51f
