[INFO] cloning repository https://github.com/felix-hedenstrom/ngramfiller
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/felix-hedenstrom/ngramfiller" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffelix-hedenstrom%2Fngramfiller", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffelix-hedenstrom%2Fngramfiller'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c5f2944db09e55f0f7bebb81c695e3cbedc11440
[INFO] checking felix-hedenstrom/ngramfiller against beta-2021-10-15 for beta-1.56-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffelix-hedenstrom%2Fngramfiller" "/workspace/builds/worker-8/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/felix-hedenstrom/ngramfiller on toolchain beta-2021-10-15
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-10-15" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/felix-hedenstrom/ngramfiller
[INFO] finished tweaking git repo https://github.com/felix-hedenstrom/ngramfiller
[INFO] tweaked toml for git repo https://github.com/felix-hedenstrom/ngramfiller written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/felix-hedenstrom/ngramfiller already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-10-15" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating git repository `https://github.com/dgrunwald/rust-cpython`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-10-15" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] f730b60543ff575f96087d87a6abdebf8fcd409565ac7883bdae576bdd972231
[INFO] running `Command { std: "docker" "start" "-a" "f730b60543ff575f96087d87a6abdebf8fcd409565ac7883bdae576bdd972231", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f730b60543ff575f96087d87a6abdebf8fcd409565ac7883bdae576bdd972231", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f730b60543ff575f96087d87a6abdebf8fcd409565ac7883bdae576bdd972231", kill_on_drop: false }`
[INFO] [stdout] f730b60543ff575f96087d87a6abdebf8fcd409565ac7883bdae576bdd972231
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-10-15" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 19c2036b7221f6c6fe1d94f53c48dc42abc604f4c3b24218ccaee167f5be2d7f
[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" "19c2036b7221f6c6fe1d94f53c48dc42abc604f4c3b24218ccaee167f5be2d7f", kill_on_drop: false }`
[INFO] [stderr]    Compiling ucd-util v0.1.5
[INFO] [stderr]    Compiling cpython v0.2.1 (https://github.com/dgrunwald/rust-cpython#c5cfd32c)
[INFO] [stderr]    Compiling thread_local v0.3.6
[INFO] [stderr]    Compiling regex-syntax v0.6.10
[INFO] [stderr]    Compiling regex v1.2.0
[INFO] [stderr]    Compiling python3-sys v0.2.1 (https://github.com/dgrunwald/rust-cpython#c5cfd32c)
[INFO] [stderr]     Checking ngramconnector v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trailing semicolon in macro used in expression position
[INFO] [stdout]    --> src/ngram_graph.rs:186:31
[INFO] [stdout]     |
[INFO] [stdout] 186 |             String::from($str);
[INFO] [stdout]     |                               ^
[INFO] [stdout] ...
[INFO] [stdout] 199 |                 s!("a") => vec![s!("test"), s!("trial")],
[INFO] [stdout]     |                 ------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(semicolon_in_expressions_from_macros)]` on by default
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #79813 <https://github.com/rust-lang/rust/issues/79813>
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trailing semicolon in macro used in expression position
[INFO] [stdout]    --> src/ngram_graph.rs:186:31
[INFO] [stdout]     |
[INFO] [stdout] 186 |             String::from($str);
[INFO] [stdout]     |                               ^
[INFO] [stdout] ...
[INFO] [stdout] 199 |                 s!("a") => vec![s!("test"), s!("trial")],
[INFO] [stdout]     |                                 ---------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #79813 <https://github.com/rust-lang/rust/issues/79813>
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trailing semicolon in macro used in expression position
[INFO] [stdout]    --> src/ngram_graph.rs:186:31
[INFO] [stdout]     |
[INFO] [stdout] 186 |             String::from($str);
[INFO] [stdout]     |                               ^
[INFO] [stdout] ...
[INFO] [stdout] 199 |                 s!("a") => vec![s!("test"), s!("trial")],
[INFO] [stdout]     |                                             ----------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #79813 <https://github.com/rust-lang/rust/issues/79813>
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trailing semicolon in macro used in expression position
[INFO] [stdout]    --> src/ngram_graph.rs:186:31
[INFO] [stdout]     |
[INFO] [stdout] 186 |             String::from($str);
[INFO] [stdout]     |                               ^
[INFO] [stdout] ...
[INFO] [stdout] 200 |                 s!("an") => vec![s!("assessment"), s!("approval")]
[INFO] [stdout]     |                 -------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #79813 <https://github.com/rust-lang/rust/issues/79813>
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trailing semicolon in macro used in expression position
[INFO] [stdout]    --> src/ngram_graph.rs:186:31
[INFO] [stdout]     |
[INFO] [stdout] 186 |             String::from($str);
[INFO] [stdout]     |                               ^
[INFO] [stdout] ...
[INFO] [stdout] 200 |                 s!("an") => vec![s!("assessment"), s!("approval")]
[INFO] [stdout]     |                                  ---------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #79813 <https://github.com/rust-lang/rust/issues/79813>
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trailing semicolon in macro used in expression position
[INFO] [stdout]    --> src/ngram_graph.rs:186:31
[INFO] [stdout]     |
[INFO] [stdout] 186 |             String::from($str);
[INFO] [stdout]     |                               ^
[INFO] [stdout] ...
[INFO] [stdout] 200 |                 s!("an") => vec![s!("assessment"), s!("approval")]
[INFO] [stdout]     |                                                    -------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #79813 <https://github.com/rust-lang/rust/issues/79813>
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trailing semicolon in macro used in expression position
[INFO] [stdout]    --> src/ngram_graph.rs:186:31
[INFO] [stdout]     |
[INFO] [stdout] 186 |             String::from($str);
[INFO] [stdout]     |                               ^
[INFO] [stdout] ...
[INFO] [stdout] 210 |                 s!("is") => is_lowest_ngrams]),
[INFO] [stdout]     |                 -------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #79813 <https://github.com/rust-lang/rust/issues/79813>
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trailing semicolon in macro used in expression position
[INFO] [stdout]    --> src/ngram_graph.rs:186:31
[INFO] [stdout]     |
[INFO] [stdout] 186 |             String::from($str);
[INFO] [stdout]     |                               ^
[INFO] [stdout] ...
[INFO] [stdout] 218 |         assert_eq!(testdata.get_neighbors(&NGram::new(vec![s!("the")])), None);
[INFO] [stdout]     |                                                            --------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #79813 <https://github.com/rust-lang/rust/issues/79813>
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trailing semicolon in macro used in expression position
[INFO] [stdout]    --> src/ngram_graph.rs:186:31
[INFO] [stdout]     |
[INFO] [stdout] 186 |             String::from($str);
[INFO] [stdout]     |                               ^
[INFO] [stdout] ...
[INFO] [stdout] 225 |             testdata.get_neighbors(&NGram::new(vec![s!("a")])),
[INFO] [stdout]     |                                                     ------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #79813 <https://github.com/rust-lang/rust/issues/79813>
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trailing semicolon in macro used in expression position
[INFO] [stdout]    --> src/ngram_graph.rs:186:31
[INFO] [stdout]     |
[INFO] [stdout] 186 |             String::from($str);
[INFO] [stdout]     |                               ^
[INFO] [stdout] ...
[INFO] [stdout] 227 |                 NGram::new(vec![s!("a"), s!("test")]),
[INFO] [stdout]     |                                 ------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #79813 <https://github.com/rust-lang/rust/issues/79813>
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trailing semicolon in macro used in expression position
[INFO] [stdout]    --> src/ngram_graph.rs:186:31
[INFO] [stdout]     |
[INFO] [stdout] 186 |             String::from($str);
[INFO] [stdout]     |                               ^
[INFO] [stdout] ...
[INFO] [stdout] 227 |                 NGram::new(vec![s!("a"), s!("test")]),
[INFO] [stdout]     |                                          ---------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #79813 <https://github.com/rust-lang/rust/issues/79813>
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trailing semicolon in macro used in expression position
[INFO] [stdout]    --> src/ngram_graph.rs:186:31
[INFO] [stdout]     |
[INFO] [stdout] 186 |             String::from($str);
[INFO] [stdout]     |                               ^
[INFO] [stdout] ...
[INFO] [stdout] 228 |                 NGram::new(vec![s!("a"), s!("trial")])
[INFO] [stdout]     |                                 ------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #79813 <https://github.com/rust-lang/rust/issues/79813>
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trailing semicolon in macro used in expression position
[INFO] [stdout]    --> src/ngram_graph.rs:186:31
[INFO] [stdout]     |
[INFO] [stdout] 186 |             String::from($str);
[INFO] [stdout]     |                               ^
[INFO] [stdout] ...
[INFO] [stdout] 228 |                 NGram::new(vec![s!("a"), s!("trial")])
[INFO] [stdout]     |                                          ----------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #79813 <https://github.com/rust-lang/rust/issues/79813>
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trailing semicolon in macro used in expression position
[INFO] [stdout]    --> src/ngram_graph.rs:186:31
[INFO] [stdout]     |
[INFO] [stdout] 186 |             String::from($str);
[INFO] [stdout]     |                               ^
[INFO] [stdout] ...
[INFO] [stdout] 237 |             &testdata.get_neighbors(&NGram::new(vec![s!("is")])).unwrap(),
[INFO] [stdout]     |                                                      -------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #79813 <https://github.com/rust-lang/rust/issues/79813>
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `r#try`: use the `?` operator instead
[INFO] [stdout]   --> src/lib.rs:74:9
[INFO] [stdout]    |
[INFO] [stdout] 74 |         r#try!(m.add(py, "__doc__", "This module is implemented in Rust"));
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `r#try`: use the `?` operator instead
[INFO] [stdout]   --> src/lib.rs:75:9
[INFO] [stdout]    |
[INFO] [stdout] 75 |         r#try!(m.add(py, "depth", py_fn!(py, depth(val: PyDict))));
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trailing semicolon in macro used in expression position
[INFO] [stdout]    --> src/ngram_graph.rs:186:31
[INFO] [stdout]     |
[INFO] [stdout] 186 |             String::from($str);
[INFO] [stdout]     |                               ^
[INFO] [stdout] ...
[INFO] [stdout] 239 |                 NGram::new(vec![s!("is"), s!("a"), s!("test")]),
[INFO] [stdout]     |                                 -------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #79813 <https://github.com/rust-lang/rust/issues/79813>
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `r#try`: use the `?` operator instead
[INFO] [stdout]   --> src/lib.rs:76:9
[INFO] [stdout]    |
[INFO] [stdout] 76 |         r#try!(m.add(
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: crate-level attribute should be in the root module
[INFO] [stdout]  --> src/graph.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(hash_set_entry)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_attributes)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trailing semicolon in macro used in expression position
[INFO] [stdout]    --> src/ngram_graph.rs:186:31
[INFO] [stdout]     |
[INFO] [stdout] 186 |             String::from($str);
[INFO] [stdout]     |                               ^
[INFO] [stdout] ...
[INFO] [stdout] 239 |                 NGram::new(vec![s!("is"), s!("a"), s!("test")]),
[INFO] [stdout]     |                                           ------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #79813 <https://github.com/rust-lang/rust/issues/79813>
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trailing semicolon in macro used in expression position
[INFO] [stdout]    --> src/ngram_graph.rs:186:31
[INFO] [stdout]     |
[INFO] [stdout] 186 |             String::from($str);
[INFO] [stdout]     |                               ^
[INFO] [stdout] ...
[INFO] [stdout] 239 |                 NGram::new(vec![s!("is"), s!("a"), s!("test")]),
[INFO] [stdout]     |                                                    ---------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #79813 <https://github.com/rust-lang/rust/issues/79813>
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trailing semicolon in macro used in expression position
[INFO] [stdout]    --> src/ngram_graph.rs:186:31
[INFO] [stdout]     |
[INFO] [stdout] 186 |             String::from($str);
[INFO] [stdout]     |                               ^
[INFO] [stdout] ...
[INFO] [stdout] 240 |                 NGram::new(vec![s!("is"), s!("a"), s!("trial")]),
[INFO] [stdout]     |                                 -------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #79813 <https://github.com/rust-lang/rust/issues/79813>
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trailing semicolon in macro used in expression position
[INFO] [stdout]    --> src/ngram_graph.rs:186:31
[INFO] [stdout]     |
[INFO] [stdout] 186 |             String::from($str);
[INFO] [stdout]     |                               ^
[INFO] [stdout] ...
[INFO] [stdout] 240 |                 NGram::new(vec![s!("is"), s!("a"), s!("trial")]),
[INFO] [stdout]     |                                           ------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #79813 <https://github.com/rust-lang/rust/issues/79813>
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trailing semicolon in macro used in expression position
[INFO] [stdout]    --> src/ngram_graph.rs:186:31
[INFO] [stdout]     |
[INFO] [stdout] 186 |             String::from($str);
[INFO] [stdout]     |                               ^
[INFO] [stdout] ...
[INFO] [stdout] 240 |                 NGram::new(vec![s!("is"), s!("a"), s!("trial")]),
[INFO] [stdout]     |                                                    ----------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #79813 <https://github.com/rust-lang/rust/issues/79813>
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trailing semicolon in macro used in expression position
[INFO] [stdout]    --> src/ngram_graph.rs:186:31
[INFO] [stdout]     |
[INFO] [stdout] 186 |             String::from($str);
[INFO] [stdout]     |                               ^
[INFO] [stdout] ...
[INFO] [stdout] 241 |                 NGram::new(vec![s!("is"), s!("an"), s!("assessment")]),
[INFO] [stdout]     |                                 -------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #79813 <https://github.com/rust-lang/rust/issues/79813>
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trailing semicolon in macro used in expression position
[INFO] [stdout]    --> src/ngram_graph.rs:186:31
[INFO] [stdout]     |
[INFO] [stdout] 186 |             String::from($str);
[INFO] [stdout]     |                               ^
[INFO] [stdout] ...
[INFO] [stdout] 241 |                 NGram::new(vec![s!("is"), s!("an"), s!("assessment")]),
[INFO] [stdout]     |                                           -------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #79813 <https://github.com/rust-lang/rust/issues/79813>
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trailing semicolon in macro used in expression position
[INFO] [stdout]    --> src/ngram_graph.rs:186:31
[INFO] [stdout]     |
[INFO] [stdout] 186 |             String::from($str);
[INFO] [stdout]     |                               ^
[INFO] [stdout] ...
[INFO] [stdout] 241 |                 NGram::new(vec![s!("is"), s!("an"), s!("assessment")]),
[INFO] [stdout]     |                                                     ---------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #79813 <https://github.com/rust-lang/rust/issues/79813>
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trailing semicolon in macro used in expression position
[INFO] [stdout]    --> src/ngram_graph.rs:186:31
[INFO] [stdout]     |
[INFO] [stdout] 186 |             String::from($str);
[INFO] [stdout]     |                               ^
[INFO] [stdout] ...
[INFO] [stdout] 242 |                 NGram::new(vec![s!("is"), s!("an"), s!("approval")]),
[INFO] [stdout]     |                                 -------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #79813 <https://github.com/rust-lang/rust/issues/79813>
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trailing semicolon in macro used in expression position
[INFO] [stdout]    --> src/ngram_graph.rs:186:31
[INFO] [stdout]     |
[INFO] [stdout] 186 |             String::from($str);
[INFO] [stdout]     |                               ^
[INFO] [stdout] ...
[INFO] [stdout] 242 |                 NGram::new(vec![s!("is"), s!("an"), s!("approval")]),
[INFO] [stdout]     |                                           -------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #79813 <https://github.com/rust-lang/rust/issues/79813>
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trailing semicolon in macro used in expression position
[INFO] [stdout]    --> src/ngram_graph.rs:186:31
[INFO] [stdout]     |
[INFO] [stdout] 186 |             String::from($str);
[INFO] [stdout]     |                               ^
[INFO] [stdout] ...
[INFO] [stdout] 242 |                 NGram::new(vec![s!("is"), s!("an"), s!("approval")]),
[INFO] [stdout]     |                                                     -------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #79813 <https://github.com/rust-lang/rust/issues/79813>
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trailing semicolon in macro used in expression position
[INFO] [stdout]    --> src/ngram_graph.rs:186:31
[INFO] [stdout]     |
[INFO] [stdout] 186 |             String::from($str);
[INFO] [stdout]     |                               ^
[INFO] [stdout] ...
[INFO] [stdout] 247 |                 .get_neighbors(&NGram::new(vec![s!("is"), s!("an")]))
[INFO] [stdout]     |                                                 -------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #79813 <https://github.com/rust-lang/rust/issues/79813>
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trailing semicolon in macro used in expression position
[INFO] [stdout]    --> src/ngram_graph.rs:186:31
[INFO] [stdout]     |
[INFO] [stdout] 186 |             String::from($str);
[INFO] [stdout]     |                               ^
[INFO] [stdout] ...
[INFO] [stdout] 247 |                 .get_neighbors(&NGram::new(vec![s!("is"), s!("an")]))
[INFO] [stdout]     |                                                           -------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #79813 <https://github.com/rust-lang/rust/issues/79813>
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trailing semicolon in macro used in expression position
[INFO] [stdout]    --> src/ngram_graph.rs:186:31
[INFO] [stdout]     |
[INFO] [stdout] 186 |             String::from($str);
[INFO] [stdout]     |                               ^
[INFO] [stdout] ...
[INFO] [stdout] 250 |                 NGram::new(vec![s!("is"), s!("an"), s!("assessment")]),
[INFO] [stdout]     |                                 -------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #79813 <https://github.com/rust-lang/rust/issues/79813>
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trailing semicolon in macro used in expression position
[INFO] [stdout]    --> src/ngram_graph.rs:186:31
[INFO] [stdout]     |
[INFO] [stdout] 186 |             String::from($str);
[INFO] [stdout]     |                               ^
[INFO] [stdout] ...
[INFO] [stdout] 250 |                 NGram::new(vec![s!("is"), s!("an"), s!("assessment")]),
[INFO] [stdout]     |                                           -------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #79813 <https://github.com/rust-lang/rust/issues/79813>
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trailing semicolon in macro used in expression position
[INFO] [stdout]    --> src/ngram_graph.rs:186:31
[INFO] [stdout]     |
[INFO] [stdout] 186 |             String::from($str);
[INFO] [stdout]     |                               ^
[INFO] [stdout] ...
[INFO] [stdout] 250 |                 NGram::new(vec![s!("is"), s!("an"), s!("assessment")]),
[INFO] [stdout]     |                                                     ---------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #79813 <https://github.com/rust-lang/rust/issues/79813>
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trailing semicolon in macro used in expression position
[INFO] [stdout]    --> src/ngram_graph.rs:186:31
[INFO] [stdout]     |
[INFO] [stdout] 186 |             String::from($str);
[INFO] [stdout]     |                               ^
[INFO] [stdout] ...
[INFO] [stdout] 251 |                 NGram::new(vec![s!("is"), s!("an"), s!("approval")]),
[INFO] [stdout]     |                                 -------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #79813 <https://github.com/rust-lang/rust/issues/79813>
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trailing semicolon in macro used in expression position
[INFO] [stdout]    --> src/ngram_graph.rs:186:31
[INFO] [stdout]     |
[INFO] [stdout] 186 |             String::from($str);
[INFO] [stdout]     |                               ^
[INFO] [stdout] ...
[INFO] [stdout] 251 |                 NGram::new(vec![s!("is"), s!("an"), s!("approval")]),
[INFO] [stdout]     |                                           -------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #79813 <https://github.com/rust-lang/rust/issues/79813>
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trailing semicolon in macro used in expression position
[INFO] [stdout]    --> src/ngram_graph.rs:186:31
[INFO] [stdout]     |
[INFO] [stdout] 186 |             String::from($str);
[INFO] [stdout]     |                               ^
[INFO] [stdout] ...
[INFO] [stdout] 251 |                 NGram::new(vec![s!("is"), s!("an"), s!("approval")]),
[INFO] [stdout]     |                                                     -------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #79813 <https://github.com/rust-lang/rust/issues/79813>
[INFO] [stdout]     = note: this warning originates in the macro `s` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `r#try`: use the `?` operator instead
[INFO] [stdout]   --> src/lib.rs:74:9
[INFO] [stdout]    |
[INFO] [stdout] 74 |         r#try!(m.add(py, "__doc__", "This module is implemented in Rust"));
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `r#try`: use the `?` operator instead
[INFO] [stdout]   --> src/lib.rs:75:9
[INFO] [stdout]    |
[INFO] [stdout] 75 |         r#try!(m.add(py, "depth", py_fn!(py, depth(val: PyDict))));
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `r#try`: use the `?` operator instead
[INFO] [stdout]   --> src/lib.rs:76:9
[INFO] [stdout]    |
[INFO] [stdout] 76 |         r#try!(m.add(
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: crate-level attribute should be in the root module
[INFO] [stdout]  --> src/graph.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(hash_set_entry)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_attributes)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0499]: cannot borrow `ngrams` as mutable more than once at a time
[INFO] [stdout]   --> src/graph.rs:38:17
[INFO] [stdout]    |
[INFO] [stdout] 38 |                 ngrams.push(neighbor);
[INFO] [stdout]    |                 ^^^^^^ second mutable borrow occurs here
[INFO] [stdout] 39 |                 let neighbor_p = ngrams.last_mut().unwrap();
[INFO] [stdout]    |                                  ------ first mutable borrow occurs here
[INFO] [stdout] 40 | 
[INFO] [stdout] 41 |                 if !visited.insert(neighbor_p){
[INFO] [stdout]    |                     ------- first borrow later used here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0499]: cannot borrow `ngrams` as mutable more than once at a time
[INFO] [stdout]   --> src/graph.rs:39:34
[INFO] [stdout]    |
[INFO] [stdout] 39 |                 let neighbor_p = ngrams.last_mut().unwrap();
[INFO] [stdout]    |                                  ^^^^^^ `ngrams` was mutably borrowed here in the previous iteration of the loop
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors; 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0499`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `ngramconnector` due to 3 previous errors; 4 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error[E0499]: cannot borrow `ngrams` as mutable more than once at a time
[INFO] [stdout]   --> src/graph.rs:38:17
[INFO] [stdout]    |
[INFO] [stdout] 38 |                 ngrams.push(neighbor);
[INFO] [stdout]    |                 ^^^^^^ second mutable borrow occurs here
[INFO] [stdout] 39 |                 let neighbor_p = ngrams.last_mut().unwrap();
[INFO] [stdout]    |                                  ------ first mutable borrow occurs here
[INFO] [stdout] 40 | 
[INFO] [stdout] 41 |                 if !visited.insert(neighbor_p){
[INFO] [stdout]    |                     ------- first borrow later used here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0499]: cannot borrow `ngrams` as mutable more than once at a time
[INFO] [stdout]   --> src/graph.rs:39:34
[INFO] [stdout]    |
[INFO] [stdout] 39 |                 let neighbor_p = ngrams.last_mut().unwrap();
[INFO] [stdout]    |                                  ^^^^^^ `ngrams` was mutably borrowed here in the previous iteration of the loop
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors; 38 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0499`.
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "19c2036b7221f6c6fe1d94f53c48dc42abc604f4c3b24218ccaee167f5be2d7f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "19c2036b7221f6c6fe1d94f53c48dc42abc604f4c3b24218ccaee167f5be2d7f", kill_on_drop: false }`
[INFO] [stdout] 19c2036b7221f6c6fe1d94f53c48dc42abc604f4c3b24218ccaee167f5be2d7f
