[INFO] fetching crate gluon_base 0.17.1...
[INFO] checking gluon_base-0.17.1 against try#f47dd4da3ae8c32c9e65d307bfe640b143e674df for pr-77526
[INFO] extracting crate gluon_base 0.17.1 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate gluon_base 0.17.1 on toolchain f47dd4da3ae8c32c9e65d307bfe640b143e674df
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "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-8/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 656defa0e14558625725039f92828553a1f5e5c24e7f7e1e22bacd511f91677d
[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" "656defa0e14558625725039f92828553a1f5e5c24e7f7e1e22bacd511f91677d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "656defa0e14558625725039f92828553a1f5e5c24e7f7e1e22bacd511f91677d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "656defa0e14558625725039f92828553a1f5e5c24e7f7e1e22bacd511f91677d", kill_on_drop: false }`
[INFO] [stdout] 656defa0e14558625725039f92828553a1f5e5c24e7f7e1e22bacd511f91677d
[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=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" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] be15dc5a77c7835275a3358988fafe42c6ef3588d1a138eb6c71dc73e0052516
[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" "be15dc5a77c7835275a3358988fafe42c6ef3588d1a138eb6c71dc73e0052516", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling log v0.4.11
[INFO] [stderr]    Compiling syn v1.0.42
[INFO] [stderr]     Checking termcolor v1.1.0
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]     Checking quick-error v1.2.3
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]     Checking unicode-width v0.1.8
[INFO] [stderr]     Checking either v1.6.1
[INFO] [stderr]     Checking regex-syntax v0.6.18
[INFO] [stderr]     Checking arrayvec v0.5.1
[INFO] [stderr]     Checking typed-arena v2.0.1
[INFO] [stderr]     Checking ahash v0.3.8
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]     Checking collect-mac v0.1.0
[INFO] [stderr]     Checking vec_map v0.8.2
[INFO] [stderr]     Checking difference v2.0.0
[INFO] [stderr]     Checking fnv v1.0.7
[INFO] [stderr]     Checking smallvec v1.4.2
[INFO] [stderr]     Checking thread_local v1.0.1
[INFO] [stderr]     Checking humantime v1.3.0
[INFO] [stderr]     Checking itertools v0.9.0
[INFO] [stderr]     Checking codespan-reporting v0.9.5
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking pretty_assertions v0.6.1
[INFO] [stderr]     Checking pretty v0.10.0
[INFO] [stderr]    Compiling num-traits v0.2.12
[INFO] [stderr]    Compiling hashbrown v0.8.2
[INFO] [stderr]     Checking aho-corasick v0.7.13
[INFO] [stderr]     Checking codespan v0.9.5
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]     Checking ordered-float v2.0.0
[INFO] [stderr]     Checking regex v1.3.9
[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/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/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: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: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: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 55.43s
[INFO] running `Command { std: "docker" "inspect" "be15dc5a77c7835275a3358988fafe42c6ef3588d1a138eb6c71dc73e0052516", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "be15dc5a77c7835275a3358988fafe42c6ef3588d1a138eb6c71dc73e0052516", kill_on_drop: false }`
[INFO] [stdout] be15dc5a77c7835275a3358988fafe42c6ef3588d1a138eb6c71dc73e0052516