[INFO] cloning repository https://github.com/zyh3838438zyh/datalog
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/zyh3838438zyh/datalog" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzyh3838438zyh%2Fdatalog", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzyh3838438zyh%2Fdatalog'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 88ec6911f558ca091ce137b19d9a27f4f8da20ad
[INFO] checking zyh3838438zyh/datalog against 1.55.0 for beta-1.56-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzyh3838438zyh%2Fdatalog" "/workspace/builds/worker-42/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-42/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/zyh3838438zyh/datalog on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/zyh3838438zyh/datalog
[INFO] finished tweaking git repo https://github.com/zyh3838438zyh/datalog
[INFO] tweaked toml for git repo https://github.com/zyh3838438zyh/datalog written to /workspace/builds/worker-42/source/Cargo.toml
[INFO] crate git repo https://github.com/zyh3838438zyh/datalog already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--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-42/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-42/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" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6cc59222d10ddc6f9816ff857c53f786b2517cb9ccf1a1c1b8df2b323ba7e004
[INFO] running `Command { std: "docker" "start" "-a" "6cc59222d10ddc6f9816ff857c53f786b2517cb9ccf1a1c1b8df2b323ba7e004", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6cc59222d10ddc6f9816ff857c53f786b2517cb9ccf1a1c1b8df2b323ba7e004", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6cc59222d10ddc6f9816ff857c53f786b2517cb9ccf1a1c1b8df2b323ba7e004", kill_on_drop: false }`
[INFO] [stdout] 6cc59222d10ddc6f9816ff857c53f786b2517cb9ccf1a1c1b8df2b323ba7e004
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-42/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-42/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" "+1.55.0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1e5bbbc1c0d4457f4b75ab8002179f3bc3d017ce1f469e78948fa00b98f24f90
[INFO] running `Command { std: "docker" "start" "-a" "1e5bbbc1c0d4457f4b75ab8002179f3bc3d017ce1f469e78948fa00b98f24f90", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking dmt v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(generic_associated_types)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(type_alias_impl_trait)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: `impl Trait` in type aliases is unstable
[INFO] [stdout]   --> src/rel.rs:51:21
[INFO] [stdout]    |
[INFO] [stdout] 51 |     type Iter<'a> = impl Iterator<Item = Self::T<'a>>;
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #63063 <https://github.com/rust-lang/rust/issues/63063> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: `impl Trait` in type aliases is unstable
[INFO] [stdout]    --> src/rel.rs:124:17
[INFO] [stdout]     |
[INFO] [stdout] 124 |     type Iter = impl Iterator<Item = Cell>;
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #63063 <https://github.com/rust-lang/rust/issues/63063> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(generic_associated_types)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(type_alias_impl_trait)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: `impl Trait` in type aliases is unstable
[INFO] [stdout]   --> src/rel.rs:51:21
[INFO] [stdout]    |
[INFO] [stdout] 51 |     type Iter<'a> = impl Iterator<Item = Self::T<'a>>;
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #63063 <https://github.com/rust-lang/rust/issues/63063> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: `impl Trait` in type aliases is unstable
[INFO] [stdout]    --> src/rel.rs:124:17
[INFO] [stdout]     |
[INFO] [stdout] 124 |     type Iter = impl Iterator<Item = Cell>;
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #63063 <https://github.com/rust-lang/rust/issues/63063> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `type_alias_impl_trait` is incomplete and may not be safe to use and/or cause compiler crashes
[INFO] [stdout]  --> src/lib.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(type_alias_impl_trait)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(incomplete_features)]` on by default
[INFO] [stdout]   = note: see issue #63063 <https://github.com/rust-lang/rust/issues/63063> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `HashSet`
[INFO] [stdout]  --> src/eval.rs:3:33
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::collections::{HashMap, HashSet};
[INFO] [stdout]   |                                 ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `type_alias_impl_trait` is incomplete and may not be safe to use and/or cause compiler crashes
[INFO] [stdout]  --> src/lib.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(type_alias_impl_trait)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(incomplete_features)]` on by default
[INFO] [stdout]   = note: see issue #63063 <https://github.com/rust-lang/rust/issues/63063> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `HashSet`
[INFO] [stdout]  --> src/eval.rs:3:33
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::collections::{HashMap, HashSet};
[INFO] [stdout]   |                                 ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]   --> src/eval.rs:77:9
[INFO] [stdout]    |
[INFO] [stdout] 72 | /         loop {
[INFO] [stdout] 73 | |             approx_delta_rels =
[INFO] [stdout] 74 | |                 SemiNaiveEval::eval_approx_delta(rules, schemas, &delta_rels, &rels);
[INFO] [stdout] 75 | |         }
[INFO] [stdout]    | |_________- any code following this expression is unreachable
[INFO] [stdout] 76 | 
[INFO] [stdout] 77 |           unimplemented!();
[INFO] [stdout]    |           ^^^^^^^^^^^^^^^^^ unreachable statement
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout]    = note: this warning originates in the macro `$crate::panic` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]   --> src/eval.rs:77:9
[INFO] [stdout]    |
[INFO] [stdout] 72 | /         loop {
[INFO] [stdout] 73 | |             approx_delta_rels =
[INFO] [stdout] 74 | |                 SemiNaiveEval::eval_approx_delta(rules, schemas, &delta_rels, &rels);
[INFO] [stdout] 75 | |         }
[INFO] [stdout]    | |_________- any code following this expression is unreachable
[INFO] [stdout] 76 | 
[INFO] [stdout] 77 |           unimplemented!();
[INFO] [stdout]    |           ^^^^^^^^^^^^^^^^^ unreachable statement
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout]    = note: this warning originates in the macro `$crate::panic` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 4 previous errors; 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0554, E0658.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 4 previous errors; 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0554, E0658.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `dmt` due to 5 previous errors; 3 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "1e5bbbc1c0d4457f4b75ab8002179f3bc3d017ce1f469e78948fa00b98f24f90", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1e5bbbc1c0d4457f4b75ab8002179f3bc3d017ce1f469e78948fa00b98f24f90", kill_on_drop: false }`
[INFO] [stdout] 1e5bbbc1c0d4457f4b75ab8002179f3bc3d017ce1f469e78948fa00b98f24f90
