[INFO] fetching crate gluon_base 0.17.1...
[INFO] checking gluon_base-0.17.1 against try#b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f for pr-76104
[INFO] extracting crate gluon_base 0.17.1 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate gluon_base 0.17.1 on toolchain b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate gluon_base 0.17.1
[INFO] finished tweaking crates.io crate gluon_base 0.17.1
[INFO] tweaked toml for crates.io crate gluon_base 0.17.1 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "+b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 32cb250171903d6bad49ba7d7f02a850b84f37605069369757b6e5e0939dbd4d
[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" "32cb250171903d6bad49ba7d7f02a850b84f37605069369757b6e5e0939dbd4d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "32cb250171903d6bad49ba7d7f02a850b84f37605069369757b6e5e0939dbd4d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "32cb250171903d6bad49ba7d7f02a850b84f37605069369757b6e5e0939dbd4d", kill_on_drop: false }`
[INFO] [stdout] 32cb250171903d6bad49ba7d7f02a850b84f37605069369757b6e5e0939dbd4d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "+b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6cc03b141abfa804dabfde50af01d0973b7c35016702d8beb951fad6fe86bcdb
[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" "6cc03b141abfa804dabfde50af01d0973b7c35016702d8beb951fad6fe86bcdb", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.77
[INFO] [stderr]    Compiling syn v1.0.41
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking env_logger v0.7.1
[INFO] [stderr]    Compiling gluon_codegen v0.17.1
[INFO] [stderr]     Checking gluon_base v0.17.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: taking a mutable reference to a `const` item
[INFO] [stdout]     --> src/ast.rs:1150:49
[INFO] [stdout]      |
[INFO] [stdout] 1150 |     let function_type = remove_aliases_cow(env, &mut NullInterner, alias_type);
[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]     --> 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/ast.rs:1150:49
[INFO] [stdout]      |
[INFO] [stdout] 1150 |     let function_type = remove_aliases_cow(env, &mut NullInterner, alias_type);
[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]     --> 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/types/mod.rs:1134:9
[INFO] [stdout]      |
[INFO] [stdout] 1134 |         NullInterner.tuple_(symbols, elems)
[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: mutable reference created due to call to this method
[INFO] [stdout]     --> src/types/mod.rs:3593:5
[INFO] [stdout]      |
[INFO] [stdout] 3593 | /     fn tuple_<S, I>(&mut self, symbols: &mut S, elems: I) -> Type<Id, T>
[INFO] [stdout] 3594 | |     where
[INFO] [stdout] 3595 | |         S: ?Sized + IdentEnv<Ident = Id>,
[INFO] [stdout] 3596 | |         T::SpannedId: From<Id>,
[INFO] [stdout] 3597 | |         I: IntoIterator<Item = T>,
[INFO] [stdout]      | |__________________________________^
[INFO] [stdout] note: `const` item defined here
[INFO] [stdout]     --> 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/types/mod.rs:1134:9
[INFO] [stdout]      |
[INFO] [stdout] 1134 |         NullInterner.tuple_(symbols, elems)
[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: mutable reference created due to call to this method
[INFO] [stdout]     --> src/types/mod.rs:3593:5
[INFO] [stdout]      |
[INFO] [stdout] 3593 | /     fn tuple_<S, I>(&mut self, symbols: &mut S, elems: I) -> Type<Id, T>
[INFO] [stdout] 3594 | |     where
[INFO] [stdout] 3595 | |         S: ?Sized + IdentEnv<Ident = Id>,
[INFO] [stdout] 3596 | |         T::SpannedId: From<Id>,
[INFO] [stdout] 3597 | |         I: IntoIterator<Item = T>,
[INFO] [stdout]      | |__________________________________^
[INFO] [stdout] note: `const` item defined here
[INFO] [stdout]     --> 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/types/mod.rs:3233:9
[INFO] [stdout]      |
[INFO] [stdout] 3233 |         &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]     --> 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/types/mod.rs:3233:9
[INFO] [stdout]      |
[INFO] [stdout] 3233 |         &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]     --> 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/types/mod.rs:4270:9
[INFO] [stdout]      |
[INFO] [stdout] 4270 |         &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]     --> 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/types/mod.rs:4307:9
[INFO] [stdout]      |
[INFO] [stdout] 4307 |         &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]     --> 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/types/mod.rs:4270:9
[INFO] [stdout]      |
[INFO] [stdout] 4270 |         &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]     --> 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/types/mod.rs:4307:9
[INFO] [stdout]      |
[INFO] [stdout] 4307 |         &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]     --> src/types/mod.rs:3825:1
[INFO] [stdout]      |
[INFO] [stdout] 3825 | pub const NullInterner: NullInterner = [];
[INFO] [stdout]      | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: taking a mutable reference to a `const` item
[INFO] [stdout]     --> tests/types.rs:468:13
[INFO] [stdout]      |
[INFO] [stdout] 468  |             &mut NullInterner,
[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/workdir/src/types/mod.rs:3825:1
[INFO] [stdout]      |
[INFO] [stdout] 3825 | pub const NullInterner: NullInterner = [];
[INFO] [stdout]      | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 30.64s
[INFO] running `Command { std: "docker" "inspect" "6cc03b141abfa804dabfde50af01d0973b7c35016702d8beb951fad6fe86bcdb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6cc03b141abfa804dabfde50af01d0973b7c35016702d8beb951fad6fe86bcdb", kill_on_drop: false }`
[INFO] [stdout] 6cc03b141abfa804dabfde50af01d0973b7c35016702d8beb951fad6fe86bcdb