[INFO] cloning repository https://github.com/nnao45/dummy-cargo-toml-creater
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/nnao45/dummy-cargo-toml-creater" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnnao45%2Fdummy-cargo-toml-creater", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnnao45%2Fdummy-cargo-toml-creater'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8ad5f88ce8507cc56ac22c8f9f5ed8cb8f498a9a
[INFO] documenting nnao45/dummy-cargo-toml-creater against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnnao45%2Fdummy-cargo-toml-creater" "/workspace/builds/worker-1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/nnao45/dummy-cargo-toml-creater on toolchain beta-2020-08-29
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/nnao45/dummy-cargo-toml-creater
[INFO] finished tweaking git repo https://github.com/nnao45/dummy-cargo-toml-creater
[INFO] tweaked toml for git repo https://github.com/nnao45/dummy-cargo-toml-creater written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/nnao45/dummy-cargo-toml-creater already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: only one of `license` or `license-file` is necessary
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded syn v0.15.35
[INFO] [stderr]   Downloaded ascii v0.9.1
[INFO] [stderr]   Downloaded toml_edit v0.1.3
[INFO] [stderr]   Downloaded cargo_toml v0.6.4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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-2020-08-29" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 51fa9582e22982a182980f2210e79161e373c791c712e4b1ef87df7ba84c7e81
[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" "51fa9582e22982a182980f2210e79161e373c791c712e4b1ef87df7ba84c7e81", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "51fa9582e22982a182980f2210e79161e373c791c712e4b1ef87df7ba84c7e81", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "51fa9582e22982a182980f2210e79161e373c791c712e4b1ef87df7ba84c7e81", kill_on_drop: false }`
[INFO] [stdout] 51fa9582e22982a182980f2210e79161e373c791c712e4b1ef87df7ba84c7e81
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "RUSTDOCFLAGS=--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-2020-08-29" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 51b30dbbd8f74c076ebc97ebecde63d08cdb1fb2ab85637dad428eaa7ccdefc0
[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" "51b30dbbd8f74c076ebc97ebecde63d08cdb1fb2ab85637dad428eaa7ccdefc0", kill_on_drop: false }`
[INFO] [stderr] warning: only one of `license` or `license-file` is necessary
[INFO] [stderr]    Compiling memchr v2.2.0
[INFO] [stderr]    Compiling syn v0.15.35
[INFO] [stderr]    Compiling byteorder v1.3.2
[INFO] [stderr]     Checking either v1.5.2
[INFO] [stderr]     Checking ascii v0.9.1
[INFO] [stderr]     Checking toml v0.4.10
[INFO] [stderr]     Checking toml v0.5.1
[INFO] [stderr]     Checking combine v3.8.1
[INFO] [stderr]    Compiling serde_derive v1.0.92
[INFO] [stderr]     Checking toml_edit v0.1.3
[INFO] [stderr]     Checking cargo_toml v0.6.4
[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" "51b30dbbd8f74c076ebc97ebecde63d08cdb1fb2ab85637dad428eaa7ccdefc0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "51b30dbbd8f74c076ebc97ebecde63d08cdb1fb2ab85637dad428eaa7ccdefc0", kill_on_drop: false }`
[INFO] [stdout] 51b30dbbd8f74c076ebc97ebecde63d08cdb1fb2ab85637dad428eaa7ccdefc0