[INFO] fetching crate gluon_completion 0.17.1...
[INFO] checking gluon_completion-0.17.1 against master#a874956d940ecb3ed524b6176a171219ac4787ea for pr-76104
[INFO] extracting crate gluon_completion 0.17.1 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate gluon_completion 0.17.1 on toolchain a874956d940ecb3ed524b6176a171219ac4787ea
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a874956d940ecb3ed524b6176a171219ac4787ea" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate gluon_completion 0.17.1
[INFO] finished tweaking crates.io crate gluon_completion 0.17.1
[INFO] tweaked toml for crates.io crate gluon_completion 0.17.1 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a874956d940ecb3ed524b6176a171219ac4787ea" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a874956d940ecb3ed524b6176a171219ac4787ea" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "+a874956d940ecb3ed524b6176a171219ac4787ea" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 75db9a2e8da8b8ed8ea66f0e56665631651e4cb3f6fd101bc1311f26b5ea1d30
[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" "75db9a2e8da8b8ed8ea66f0e56665631651e4cb3f6fd101bc1311f26b5ea1d30", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "75db9a2e8da8b8ed8ea66f0e56665631651e4cb3f6fd101bc1311f26b5ea1d30", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "75db9a2e8da8b8ed8ea66f0e56665631651e4cb3f6fd101bc1311f26b5ea1d30", kill_on_drop: false }`
[INFO] [stdout] 75db9a2e8da8b8ed8ea66f0e56665631651e4cb3f6fd101bc1311f26b5ea1d30
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+a874956d940ecb3ed524b6176a171219ac4787ea" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8beaea5c0139d9a5331daa07bf26eea798d2785c1e30e544099fc2be6a5335c5
[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" "8beaea5c0139d9a5331daa07bf26eea798d2785c1e30e544099fc2be6a5335c5", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.41
[INFO] [stderr]    Compiling serde_derive v1.0.116
[INFO] [stderr]    Compiling gluon_codegen v0.17.1
[INFO] [stderr]     Checking gluon_base v0.17.1
[INFO] [stderr]    Compiling serde v1.0.116
[INFO] [stderr]     Checking gluon_check v0.17.1
[INFO] [stderr]     Checking gluon_completion v0.17.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: taking a mutable reference to a `const` item
[INFO] [stdout]     --> src/lib.rs:155:68
[INFO] [stdout]      |
[INFO] [stdout] 155  |                 let unaliased = resolve::remove_aliases(&self.env, &mut NullInterner, typ.clone());
[INFO] [stdout]      |                                                                    ^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(const_item_mutation)]` on by default
[INFO] [stdout]      = note: each usage of a `const` item creates a new temporary
[INFO] [stdout]      = note: the mutable reference will refer to this temporary, not the original `const` item
[INFO] [stdout] note: `const` item defined here
[INFO] [stdout]     --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/gluon_base-0.17.1/src/types/mod.rs:3825:1
[INFO] [stdout]      |
[INFO] [stdout] 3825 | pub const NullInterner: NullInterner = [];
[INFO] [stdout]      | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: taking a mutable reference to a `const` item
[INFO] [stdout]     --> src/lib.rs:362:29
[INFO] [stdout]      |
[INFO] [stdout] 362  | ...                   &mut NullInterner,
[INFO] [stdout]      |                       ^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: each usage of a `const` item creates a new temporary
[INFO] [stdout]      = note: the mutable reference will refer to this temporary, not the original `const` item
[INFO] [stdout] note: `const` item defined here
[INFO] [stdout]     --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/gluon_base-0.17.1/src/types/mod.rs:3825:1
[INFO] [stdout]      |
[INFO] [stdout] 3825 | pub const NullInterner: NullInterner = [];
[INFO] [stdout]      | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: taking a mutable reference to a `const` item
[INFO] [stdout]     --> src/lib.rs:1306:72
[INFO] [stdout]      |
[INFO] [stdout] 1306 | ...                   let typ = resolve::remove_aliases(env, &mut NullInterner, typ);
[INFO] [stdout]      |                                                              ^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: each usage of a `const` item creates a new temporary
[INFO] [stdout]      = note: the mutable reference will refer to this temporary, not the original `const` item
[INFO] [stdout] note: `const` item defined here
[INFO] [stdout]     --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/gluon_base-0.17.1/src/types/mod.rs:3825:1
[INFO] [stdout]      |
[INFO] [stdout] 3825 | pub const NullInterner: NullInterner = [];
[INFO] [stdout]      | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: taking a mutable reference to a `const` item
[INFO] [stdout]     --> src/lib.rs:1328:73
[INFO] [stdout]      |
[INFO] [stdout] 1328 | ...                   let typ = resolve::remove_aliases(&env, &mut NullInterner, typ);
[INFO] [stdout]      |                                                               ^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: each usage of a `const` item creates a new temporary
[INFO] [stdout]      = note: the mutable reference will refer to this temporary, not the original `const` item
[INFO] [stdout] note: `const` item defined here
[INFO] [stdout]     --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/gluon_base-0.17.1/src/types/mod.rs:3825:1
[INFO] [stdout]      |
[INFO] [stdout] 3825 | pub const NullInterner: NullInterner = [];
[INFO] [stdout]      | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: taking a mutable reference to a `const` item
[INFO] [stdout]     --> src/lib.rs:1371:68
[INFO] [stdout]      |
[INFO] [stdout] 1371 |                         let typ = resolve::remove_aliases_cow(env, &mut NullInterner, typ);
[INFO] [stdout]      |                                                                    ^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: each usage of a `const` item creates a new temporary
[INFO] [stdout]      = note: the mutable reference will refer to this temporary, not the original `const` item
[INFO] [stdout] note: `const` item defined here
[INFO] [stdout]     --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/gluon_base-0.17.1/src/types/mod.rs:3825:1
[INFO] [stdout]      |
[INFO] [stdout] 3825 | pub const NullInterner: NullInterner = [];
[INFO] [stdout]      | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: taking a mutable reference to a `const` item
[INFO] [stdout]     --> src/lib.rs:1412:68
[INFO] [stdout]      |
[INFO] [stdout] 1412 | ...                   let typ = resolve::remove_aliases(env, &mut NullInterner, typ);
[INFO] [stdout]      |                                                              ^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: each usage of a `const` item creates a new temporary
[INFO] [stdout]      = note: the mutable reference will refer to this temporary, not the original `const` item
[INFO] [stdout] note: `const` item defined here
[INFO] [stdout]     --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/gluon_base-0.17.1/src/types/mod.rs:3825:1
[INFO] [stdout]      |
[INFO] [stdout] 3825 | pub const NullInterner: NullInterner = [];
[INFO] [stdout]      | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling string_cache v0.8.0
[INFO] [stderr]    Compiling docopt v1.1.0
[INFO] [stderr]    Compiling lalrpop v0.19.1
[INFO] [stderr]    Compiling gluon_parser v0.17.1
[INFO] [stdout] error: couldn't read tests/support/../../../check/tests/support/mod.rs: No such file or directory (os error 2)
[INFO] [stdout]   --> tests/support/mod.rs:29:1
[INFO] [stdout]    |
[INFO] [stdout] 29 | mod check_support;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: couldn't read tests/support/../../../check/tests/support/mod.rs: No such file or directory (os error 2)
[INFO] [stdout]   --> tests/support/mod.rs:29:1
[INFO] [stdout]    |
[INFO] [stdout] 29 | mod check_support;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `gluon_completion`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: couldn't read tests/support/../../../check/tests/support/mod.rs: No such file or directory (os error 2)
[INFO] [stdout]   --> tests/support/mod.rs:29:1
[INFO] [stdout]    |
[INFO] [stdout] 29 | mod check_support;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: couldn't read tests/support/../../../check/tests/support/mod.rs: No such file or directory (os error 2)
[INFO] [stdout]   --> tests/support/mod.rs:29:1
[INFO] [stdout]    |
[INFO] [stdout] 29 | mod check_support;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: taking a mutable reference to a `const` item
[INFO] [stdout]     --> src/lib.rs:155:68
[INFO] [stdout]      |
[INFO] [stdout] 155  |                 let unaliased = resolve::remove_aliases(&self.env, &mut NullInterner, typ.clone());
[INFO] [stdout]      |                                                                    ^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(const_item_mutation)]` on by default
[INFO] [stdout]      = note: each usage of a `const` item creates a new temporary
[INFO] [stdout]      = note: the mutable reference will refer to this temporary, not the original `const` item
[INFO] [stdout] note: `const` item defined here
[INFO] [stdout]     --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/gluon_base-0.17.1/src/types/mod.rs:3825:1
[INFO] [stdout]      |
[INFO] [stdout] 3825 | pub const NullInterner: NullInterner = [];
[INFO] [stdout]      | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: taking a mutable reference to a `const` item
[INFO] [stdout]     --> src/lib.rs:362:29
[INFO] [stdout]      |
[INFO] [stdout] 362  | ...                   &mut NullInterner,
[INFO] [stdout]      |                       ^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: each usage of a `const` item creates a new temporary
[INFO] [stdout]      = note: the mutable reference will refer to this temporary, not the original `const` item
[INFO] [stdout] note: `const` item defined here
[INFO] [stdout]     --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/gluon_base-0.17.1/src/types/mod.rs:3825:1
[INFO] [stdout]      |
[INFO] [stdout] 3825 | pub const NullInterner: NullInterner = [];
[INFO] [stdout]      | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: taking a mutable reference to a `const` item
[INFO] [stdout]     --> src/lib.rs:1306:72
[INFO] [stdout]      |
[INFO] [stdout] 1306 | ...                   let typ = resolve::remove_aliases(env, &mut NullInterner, typ);
[INFO] [stdout]      |                                                              ^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: each usage of a `const` item creates a new temporary
[INFO] [stdout]      = note: the mutable reference will refer to this temporary, not the original `const` item
[INFO] [stdout] note: `const` item defined here
[INFO] [stdout]     --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/gluon_base-0.17.1/src/types/mod.rs:3825:1
[INFO] [stdout]      |
[INFO] [stdout] 3825 | pub const NullInterner: NullInterner = [];
[INFO] [stdout]      | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: taking a mutable reference to a `const` item
[INFO] [stdout]     --> src/lib.rs:1328:73
[INFO] [stdout]      |
[INFO] [stdout] 1328 | ...                   let typ = resolve::remove_aliases(&env, &mut NullInterner, typ);
[INFO] [stdout]      |                                                               ^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: each usage of a `const` item creates a new temporary
[INFO] [stdout]      = note: the mutable reference will refer to this temporary, not the original `const` item
[INFO] [stdout] note: `const` item defined here
[INFO] [stdout]     --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/gluon_base-0.17.1/src/types/mod.rs:3825:1
[INFO] [stdout]      |
[INFO] [stdout] 3825 | pub const NullInterner: NullInterner = [];
[INFO] [stdout]      | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: taking a mutable reference to a `const` item
[INFO] [stdout]     --> src/lib.rs:1371:68
[INFO] [stdout]      |
[INFO] [stdout] 1371 |                         let typ = resolve::remove_aliases_cow(env, &mut NullInterner, typ);
[INFO] [stdout]      |                                                                    ^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: each usage of a `const` item creates a new temporary
[INFO] [stdout]      = note: the mutable reference will refer to this temporary, not the original `const` item
[INFO] [stdout] note: `const` item defined here
[INFO] [stdout]     --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/gluon_base-0.17.1/src/types/mod.rs:3825:1
[INFO] [stdout]      |
[INFO] [stdout] 3825 | pub const NullInterner: NullInterner = [];
[INFO] [stdout]      | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: taking a mutable reference to a `const` item
[INFO] [stdout]     --> src/lib.rs:1412:68
[INFO] [stdout]      |
[INFO] [stdout] 1412 | ...                   let typ = resolve::remove_aliases(env, &mut NullInterner, typ);
[INFO] [stdout]      |                                                              ^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: each usage of a `const` item creates a new temporary
[INFO] [stdout]      = note: the mutable reference will refer to this temporary, not the original `const` item
[INFO] [stdout] note: `const` item defined here
[INFO] [stdout]     --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/gluon_base-0.17.1/src/types/mod.rs:3825:1
[INFO] [stdout]      |
[INFO] [stdout] 3825 | pub const NullInterner: NullInterner = [];
[INFO] [stdout]      | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "8beaea5c0139d9a5331daa07bf26eea798d2785c1e30e544099fc2be6a5335c5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8beaea5c0139d9a5331daa07bf26eea798d2785c1e30e544099fc2be6a5335c5", kill_on_drop: false }`
[INFO] [stdout] 8beaea5c0139d9a5331daa07bf26eea798d2785c1e30e544099fc2be6a5335c5