[INFO] cloning repository https://github.com/codesections/mnemonic
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/codesections/mnemonic" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcodesections%2Fmnemonic", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcodesections%2Fmnemonic'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c63b320f2a323cd661cc51ceb520f86c80cb8af9
[INFO] checking codesections/mnemonic against beta for pr-78714
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcodesections%2Fmnemonic" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/codesections/mnemonic 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/codesections/mnemonic
[INFO] finished tweaking git repo https://github.com/codesections/mnemonic
[INFO] tweaked toml for git repo https://github.com/codesections/mnemonic written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/codesections/mnemonic 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fb044a1d290595cb5b3e678381b7bd12f93ee4c466860ba484a1eb79a4d25e66
[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" "fb044a1d290595cb5b3e678381b7bd12f93ee4c466860ba484a1eb79a4d25e66", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fb044a1d290595cb5b3e678381b7bd12f93ee4c466860ba484a1eb79a4d25e66", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fb044a1d290595cb5b3e678381b7bd12f93ee4c466860ba484a1eb79a4d25e66", kill_on_drop: false }`
[INFO] [stdout] fb044a1d290595cb5b3e678381b7bd12f93ee4c466860ba484a1eb79a4d25e66
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2e8d3cb6a13bd43792b5b00768eb605939b52543e946dd9cb8032c3e425ffd44
[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" "2e8d3cb6a13bd43792b5b00768eb605939b52543e946dd9cb8032c3e425ffd44", kill_on_drop: false }`
[INFO] [stderr]    Compiling fnv v1.0.6
[INFO] [stderr]    Compiling ident_case v1.0.0
[INFO] [stderr]    Compiling plist v0.3.0
[INFO] [stderr]    Compiling derive_builder v0.7.0
[INFO] [stderr]     Checking either v1.5.0
[INFO] [stderr]     Checking ascii v0.9.1
[INFO] [stderr]     Checking shell-words v0.1.0
[INFO] [stderr]     Checking roff v0.1.0
[INFO] [stderr]     Checking open v1.2.2
[INFO] [stderr]    Compiling miniz-sys v0.1.11
[INFO] [stderr]    Compiling ansi_colours v1.0.1
[INFO] [stderr]    Compiling onig_sys v69.1.0
[INFO] [stderr]     Checking xml-rs v0.7.0
[INFO] [stderr]     Checking regex-syntax v0.6.4
[INFO] [stderr]     Checking colored v1.7.0
[INFO] [stderr]     Checking yaml-rust v0.4.2
[INFO] [stderr]     Checking clicolors-control v0.2.0
[INFO] [stderr]     Checking directories v1.0.2
[INFO] [stderr]     Checking bincode v1.0.1
[INFO] [stderr]     Checking float-cmp v0.4.0
[INFO] [stderr]     Checking content_inspector v0.2.4
[INFO] [stderr]     Checking man v0.3.0
[INFO] [stderr]     Checking error-chain v0.12.0
[INFO] [stderr]    Compiling darling_core v0.8.3
[INFO] [stderr]    Compiling serde_derive v1.0.85
[INFO] [stderr]     Checking tempfile v3.0.5
[INFO] [stderr]     Checking combine v3.6.6
[INFO] [stderr]     Checking flate2 v1.0.6
[INFO] [stderr]     Checking regex v1.1.0
[INFO] [stderr]    Compiling darling_macro v0.8.3
[INFO] [stderr]     Checking onig v4.3.1
[INFO] [stderr]     Checking globset v0.4.2
[INFO] [stderr]     Checking console v0.6.2
[INFO] [stderr]     Checking predicates v1.0.0
[INFO] [stderr]    Compiling darling v0.8.3
[INFO] [stderr]     Checking ignore v0.4.6
[INFO] [stderr]    Compiling derive_builder_core v0.4.0
[INFO] [stderr]     Checking globwalk v0.5.0
[INFO] [stderr]     Checking assert_fs v0.11.3
[INFO] [stderr]     Checking syntect v3.0.2
[INFO] [stderr]     Checking toml_edit v0.1.3
[INFO] [stderr]     Checking prettyprint v0.4.1
[INFO] [stdout] error[E0502]: cannot borrow `v` as immutable because it is also borrowed as mutable
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/toml_edit-0.1.3/src/index.rs:55:65
[INFO] [stdout]    |
[INFO] [stdout] 44 |       fn index_or_insert<'v>(&self, v: &'v mut Item) -> &'v mut Item {
[INFO] [stdout]    |                          -- lifetime `'v` defined here
[INFO] [stdout] 45 | /         match *v {
[INFO] [stdout] 46 | |             Item::ArrayOfTables(ref mut vec) => {
[INFO] [stdout] 47 | |                 vec.values.get_mut(*self).expect("index out of bounds")
[INFO] [stdout] 48 | |             }
[INFO] [stdout] 49 | |             Item::Value(ref mut a) if a.is_array() => a
[INFO] [stdout]    | |                         --------- mutable borrow occurs here
[INFO] [stdout] ...  |
[INFO] [stdout] 55 | |             _ => panic!("cannot access index {} in {:?}", self, v),
[INFO] [stdout]    | |                                                                 ^ immutable borrow occurs here
[INFO] [stdout] 56 | |         }
[INFO] [stdout]    | |_________- returning this value requires that `v.0` is borrowed for `'v`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0502]: cannot borrow `v` as immutable because it is also borrowed as mutable
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/toml_edit-0.1.3/src/index.rs:88:63
[INFO] [stdout]    |
[INFO] [stdout] 70 |       fn index_or_insert<'v>(&self, v: &'v mut Item) -> &'v mut Item {
[INFO] [stdout]    |                          -- lifetime `'v` defined here
[INFO] [stdout] ...
[INFO] [stdout] 77 | /         match *v {
[INFO] [stdout] 78 | |             Item::Table(ref mut t) => t.entry(self).or_insert(Item::None),
[INFO] [stdout] 79 | |             Item::Value(ref mut v) if v.is_inline_table() => {
[INFO] [stdout]    | |                         --------- mutable borrow occurs here
[INFO] [stdout] 80 | |                 &mut v
[INFO] [stdout] ...  |
[INFO] [stdout] 88 | |             _ => panic!("cannot access key {} in {:?}", self, v),
[INFO] [stdout]    | |                                                               ^ immutable borrow occurs here
[INFO] [stdout] 89 | |         }
[INFO] [stdout]    | |_________- returning this value requires that `v.0` is borrowed for `'v`
[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 E0502`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `toml_edit`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "2e8d3cb6a13bd43792b5b00768eb605939b52543e946dd9cb8032c3e425ffd44", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2e8d3cb6a13bd43792b5b00768eb605939b52543e946dd9cb8032c3e425ffd44", kill_on_drop: false }`
[INFO] [stdout] 2e8d3cb6a13bd43792b5b00768eb605939b52543e946dd9cb8032c3e425ffd44