[INFO] cloning repository https://github.com/pbzweihander/subtoml-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/pbzweihander/subtoml-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpbzweihander%2Fsubtoml-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpbzweihander%2Fsubtoml-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 1a8628734716635f1f1813a9fe6c82208eb0a8ea
[INFO] testing pbzweihander/subtoml-rs against beta-2021-01-01 for beta-1.50-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpbzweihander%2Fsubtoml-rs" "/workspace/builds/worker-13/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-13/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/pbzweihander/subtoml-rs on toolchain beta-2021-01-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/pbzweihander/subtoml-rs
[INFO] finished tweaking git repo https://github.com/pbzweihander/subtoml-rs
[INFO] tweaked toml for git repo https://github.com/pbzweihander/subtoml-rs written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] crate git repo https://github.com/pbzweihander/subtoml-rs already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded ascii v0.9.1
[INFO] [stderr]   Downloaded structopt v0.2.16
[INFO] [stderr]   Downloaded structopt-derive v0.2.16
[INFO] [stderr]   Downloaded syn v0.15.35
[INFO] [stderr]   Downloaded libc v0.2.58
[INFO] [stderr]   Downloaded toml_edit v0.1.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3435d1b752cf2ef0c00d72fa286ae17c7c5c293485f5f70046338530324016e2
[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" "3435d1b752cf2ef0c00d72fa286ae17c7c5c293485f5f70046338530324016e2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3435d1b752cf2ef0c00d72fa286ae17c7c5c293485f5f70046338530324016e2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3435d1b752cf2ef0c00d72fa286ae17c7c5c293485f5f70046338530324016e2", kill_on_drop: false }`
[INFO] [stdout] 3435d1b752cf2ef0c00d72fa286ae17c7c5c293485f5f70046338530324016e2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8d267c6a2b8590729485e23558b1cf9d11a15f6129e9317d694b20c41b716801
[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" "8d267c6a2b8590729485e23558b1cf9d11a15f6129e9317d694b20c41b716801", kill_on_drop: false }`
[INFO] [stderr]    Compiling byteorder v1.3.2
[INFO] [stderr]    Compiling syn v0.15.35
[INFO] [stderr]    Compiling memchr v2.2.0
[INFO] [stderr]    Compiling either v1.5.2
[INFO] [stderr]    Compiling ascii v0.9.1
[INFO] [stderr]    Compiling quote v0.6.12
[INFO] [stderr]    Compiling clap v2.33.0
[INFO] [stderr]    Compiling chrono v0.4.6
[INFO] [stderr]    Compiling combine v3.8.1
[INFO] [stderr]    Compiling structopt-derive v0.2.16
[INFO] [stderr]    Compiling structopt v0.2.16
[INFO] [stderr]    Compiling toml_edit v0.1.3
[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" "8d267c6a2b8590729485e23558b1cf9d11a15f6129e9317d694b20c41b716801", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8d267c6a2b8590729485e23558b1cf9d11a15f6129e9317d694b20c41b716801", kill_on_drop: false }`
[INFO] [stdout] 8d267c6a2b8590729485e23558b1cf9d11a15f6129e9317d694b20c41b716801