[INFO] fetching crate class_file 0.1.0...
[INFO] checking class_file-0.1.0 against try#f47dd4da3ae8c32c9e65d307bfe640b143e674df for pr-77526
[INFO] extracting crate class_file 0.1.0 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate class_file 0.1.0 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 class_file 0.1.0
[INFO] finished tweaking crates.io crate class_file 0.1.0
[INFO] tweaked toml for crates.io crate class_file 0.1.0 written to /workspace/builds/worker-0/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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded mutf8 v0.1.0
[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" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 912257d53c1adb3cd83749f8c8b6a59b8f6e6479ea9ad0faa2862298c20110a5
[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" "912257d53c1adb3cd83749f8c8b6a59b8f6e6479ea9ad0faa2862298c20110a5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "912257d53c1adb3cd83749f8c8b6a59b8f6e6479ea9ad0faa2862298c20110a5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "912257d53c1adb3cd83749f8c8b6a59b8f6e6479ea9ad0faa2862298c20110a5", kill_on_drop: false }`
[INFO] [stdout] 912257d53c1adb3cd83749f8c8b6a59b8f6e6479ea9ad0faa2862298c20110a5
[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" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "check" "--frozen" "--all" "--all-targets" "--message-format=json", 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] 642c4c5c15ede8c0fe8a9b32d418246aa715034c3602d3332df4d331b5d4607b
[INFO] running `Command { std: "docker" "start" "-a" "642c4c5c15ede8c0fe8a9b32d418246aa715034c3602d3332df4d331b5d4607b", kill_on_drop: false }`
[INFO] [stderr]     Checking mutf8 v0.1.0
[INFO] [stderr]     Checking class_file v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused `#[macro_use]` import
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #[macro_use]
[INFO] [stdout]   | ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `CONSTANT_INTEGER_TAG` is imported redundantly
[INFO] [stdout]    --> src/attr.rs:109:4
[INFO] [stdout]     |
[INFO] [stdout] 3   | use crate::*;
[INFO] [stdout]     |     -------- the item `CONSTANT_INTEGER_TAG` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 109 |             CONSTANT_INTEGER_TAG,
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `CONSTANT_FLOAT_TAG` is imported redundantly
[INFO] [stdout]    --> src/attr.rs:110:4
[INFO] [stdout]     |
[INFO] [stdout] 3   | use crate::*;
[INFO] [stdout]     |     -------- the item `CONSTANT_FLOAT_TAG` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 110 |             CONSTANT_FLOAT_TAG,
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `CONSTANT_LONG_TAG` is imported redundantly
[INFO] [stdout]    --> src/attr.rs:111:4
[INFO] [stdout]     |
[INFO] [stdout] 3   | use crate::*;
[INFO] [stdout]     |     -------- the item `CONSTANT_LONG_TAG` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 111 |             CONSTANT_LONG_TAG,
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `CONSTANT_DOUBLE_TAG` is imported redundantly
[INFO] [stdout]    --> src/attr.rs:112:4
[INFO] [stdout]     |
[INFO] [stdout] 3   | use crate::*;
[INFO] [stdout]     |     -------- the item `CONSTANT_DOUBLE_TAG` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 112 |             CONSTANT_DOUBLE_TAG,
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `CONSTANT_STRING_TAG` is imported redundantly
[INFO] [stdout]    --> src/attr.rs:113:4
[INFO] [stdout]     |
[INFO] [stdout] 3   | use crate::*;
[INFO] [stdout]     |     -------- the item `CONSTANT_STRING_TAG` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 113 |             CONSTANT_STRING_TAG,
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `CONSTANT_INTEGER_TAG` is imported redundantly
[INFO] [stdout]    --> src/attr.rs:649:4
[INFO] [stdout]     |
[INFO] [stdout] 3   | use crate::*;
[INFO] [stdout]     |     -------- the item `CONSTANT_INTEGER_TAG` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 649 |             CONSTANT_INTEGER_TAG,
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `CONSTANT_FLOAT_TAG` is imported redundantly
[INFO] [stdout]    --> src/attr.rs:650:4
[INFO] [stdout]     |
[INFO] [stdout] 3   | use crate::*;
[INFO] [stdout]     |     -------- the item `CONSTANT_FLOAT_TAG` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 650 |             CONSTANT_FLOAT_TAG,
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `CONSTANT_LONG_TAG` is imported redundantly
[INFO] [stdout]    --> src/attr.rs:651:4
[INFO] [stdout]     |
[INFO] [stdout] 3   | use crate::*;
[INFO] [stdout]     |     -------- the item `CONSTANT_LONG_TAG` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 651 |             CONSTANT_LONG_TAG,
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `CONSTANT_DOUBLE_TAG` is imported redundantly
[INFO] [stdout]    --> src/attr.rs:652:4
[INFO] [stdout]     |
[INFO] [stdout] 3   | use crate::*;
[INFO] [stdout]     |     -------- the item `CONSTANT_DOUBLE_TAG` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 652 |             CONSTANT_DOUBLE_TAG,
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `CONSTANT_STRING_TAG` is imported redundantly
[INFO] [stdout]    --> src/attr.rs:653:4
[INFO] [stdout]     |
[INFO] [stdout] 3   | use crate::*;
[INFO] [stdout]     |     -------- the item `CONSTANT_STRING_TAG` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 653 |             CONSTANT_STRING_TAG,
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `CONSTANT_METHOD_HANDLE_TAG` is imported redundantly
[INFO] [stdout]    --> src/attr.rs:654:4
[INFO] [stdout]     |
[INFO] [stdout] 3   | use crate::*;
[INFO] [stdout]     |     -------- the item `CONSTANT_METHOD_HANDLE_TAG` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 654 |             CONSTANT_METHOD_HANDLE_TAG,
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `CONSTANT_METHOD_TYPE_TAG` is imported redundantly
[INFO] [stdout]    --> src/attr.rs:655:4
[INFO] [stdout]     |
[INFO] [stdout] 3   | use crate::*;
[INFO] [stdout]     |     -------- the item `CONSTANT_METHOD_TYPE_TAG` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 655 |             CONSTANT_METHOD_TYPE_TAG,
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `CONSTANT_DYNAMIC_TAG` is imported redundantly
[INFO] [stdout]    --> src/attr.rs:656:4
[INFO] [stdout]     |
[INFO] [stdout] 3   | use crate::*;
[INFO] [stdout]     |     -------- the item `CONSTANT_DYNAMIC_TAG` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 656 |             CONSTANT_DYNAMIC_TAG,
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `#[macro_use]` import
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #[macro_use]
[INFO] [stdout]   | ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `CONSTANT_INTEGER_TAG` is imported redundantly
[INFO] [stdout]    --> src/attr.rs:109:4
[INFO] [stdout]     |
[INFO] [stdout] 3   | use crate::*;
[INFO] [stdout]     |     -------- the item `CONSTANT_INTEGER_TAG` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 109 |             CONSTANT_INTEGER_TAG,
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `CONSTANT_FLOAT_TAG` is imported redundantly
[INFO] [stdout]    --> src/attr.rs:110:4
[INFO] [stdout]     |
[INFO] [stdout] 3   | use crate::*;
[INFO] [stdout]     |     -------- the item `CONSTANT_FLOAT_TAG` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 110 |             CONSTANT_FLOAT_TAG,
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `CONSTANT_LONG_TAG` is imported redundantly
[INFO] [stdout]    --> src/attr.rs:111:4
[INFO] [stdout]     |
[INFO] [stdout] 3   | use crate::*;
[INFO] [stdout]     |     -------- the item `CONSTANT_LONG_TAG` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 111 |             CONSTANT_LONG_TAG,
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `CONSTANT_DOUBLE_TAG` is imported redundantly
[INFO] [stdout]    --> src/attr.rs:112:4
[INFO] [stdout]     |
[INFO] [stdout] 3   | use crate::*;
[INFO] [stdout]     |     -------- the item `CONSTANT_DOUBLE_TAG` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 112 |             CONSTANT_DOUBLE_TAG,
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `CONSTANT_STRING_TAG` is imported redundantly
[INFO] [stdout]    --> src/attr.rs:113:4
[INFO] [stdout]     |
[INFO] [stdout] 3   | use crate::*;
[INFO] [stdout]     |     -------- the item `CONSTANT_STRING_TAG` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 113 |             CONSTANT_STRING_TAG,
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `CONSTANT_INTEGER_TAG` is imported redundantly
[INFO] [stdout]    --> src/attr.rs:649:4
[INFO] [stdout]     |
[INFO] [stdout] 3   | use crate::*;
[INFO] [stdout]     |     -------- the item `CONSTANT_INTEGER_TAG` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 649 |             CONSTANT_INTEGER_TAG,
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `CONSTANT_FLOAT_TAG` is imported redundantly
[INFO] [stdout]    --> src/attr.rs:650:4
[INFO] [stdout]     |
[INFO] [stdout] 3   | use crate::*;
[INFO] [stdout]     |     -------- the item `CONSTANT_FLOAT_TAG` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 650 |             CONSTANT_FLOAT_TAG,
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `CONSTANT_LONG_TAG` is imported redundantly
[INFO] [stdout]    --> src/attr.rs:651:4
[INFO] [stdout]     |
[INFO] [stdout] 3   | use crate::*;
[INFO] [stdout]     |     -------- the item `CONSTANT_LONG_TAG` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 651 |             CONSTANT_LONG_TAG,
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `CONSTANT_DOUBLE_TAG` is imported redundantly
[INFO] [stdout]    --> src/attr.rs:652:4
[INFO] [stdout]     |
[INFO] [stdout] 3   | use crate::*;
[INFO] [stdout]     |     -------- the item `CONSTANT_DOUBLE_TAG` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 652 |             CONSTANT_DOUBLE_TAG,
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `CONSTANT_STRING_TAG` is imported redundantly
[INFO] [stdout]    --> src/attr.rs:653:4
[INFO] [stdout]     |
[INFO] [stdout] 3   | use crate::*;
[INFO] [stdout]     |     -------- the item `CONSTANT_STRING_TAG` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 653 |             CONSTANT_STRING_TAG,
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `CONSTANT_METHOD_HANDLE_TAG` is imported redundantly
[INFO] [stdout]    --> src/attr.rs:654:4
[INFO] [stdout]     |
[INFO] [stdout] 3   | use crate::*;
[INFO] [stdout]     |     -------- the item `CONSTANT_METHOD_HANDLE_TAG` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 654 |             CONSTANT_METHOD_HANDLE_TAG,
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `CONSTANT_METHOD_TYPE_TAG` is imported redundantly
[INFO] [stdout]    --> src/attr.rs:655:4
[INFO] [stdout]     |
[INFO] [stdout] 3   | use crate::*;
[INFO] [stdout]     |     -------- the item `CONSTANT_METHOD_TYPE_TAG` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 655 |             CONSTANT_METHOD_TYPE_TAG,
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `CONSTANT_DYNAMIC_TAG` is imported redundantly
[INFO] [stdout]    --> src/attr.rs:656:4
[INFO] [stdout]     |
[INFO] [stdout] 3   | use crate::*;
[INFO] [stdout]     |     -------- the item `CONSTANT_DYNAMIC_TAG` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 656 |             CONSTANT_DYNAMIC_TAG,
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 14 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 14 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.64s
[INFO] running `Command { std: "docker" "inspect" "642c4c5c15ede8c0fe8a9b32d418246aa715034c3602d3332df4d331b5d4607b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "642c4c5c15ede8c0fe8a9b32d418246aa715034c3602d3332df4d331b5d4607b", kill_on_drop: false }`
[INFO] [stdout] 642c4c5c15ede8c0fe8a9b32d418246aa715034c3602d3332df4d331b5d4607b