[INFO] updating cached repository https://github.com/ExcaliburZero/jvm-class-file-parser
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/mnt/big/crater/work/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 612bc50bcf238a451b8beb6b957f714a51d1602c
[INFO] checking ExcaliburZero/jvm-class-file-parser against master#c9edc02e8320a9e5799d185910ece7d491f524e6 for pr-64398
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2FExcaliburZero%2Fjvm-class-file-parser" "work/builds/worker-0/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ExcaliburZero/jvm-class-file-parser on toolchain c9edc02e8320a9e5799d185910ece7d491f524e6-alt
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+c9edc02e8320a9e5799d185910ece7d491f524e6-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/ExcaliburZero/jvm-class-file-parser
[INFO] finished tweaking git repo https://github.com/ExcaliburZero/jvm-class-file-parser
[INFO] tweaked toml for git repo https://github.com/ExcaliburZero/jvm-class-file-parser written to work/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/ExcaliburZero/jvm-class-file-parser already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+c9edc02e8320a9e5799d185910ece7d491f524e6-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/mnt/big/crater/work/builds/worker-0/source:/opt/rustwide/workdir:ro,Z" "-v" "/mnt/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+c9edc02e8320a9e5799d185910ece7d491f524e6-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] a6fac38a08304b8eefecc8f526574e1e44149dbcb5441cca5e494f9b5b732024
[INFO] running `"docker" "start" "-a" "a6fac38a08304b8eefecc8f526574e1e44149dbcb5441cca5e494f9b5b732024"`
[INFO] [stderr]     Checking jvm-class-file-parser v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: constant item is never used: `CONSTANT_TAG_FIELDREF`
[INFO] [stderr]   --> src/writing.rs:14:1
[INFO] [stderr]    |
[INFO] [stderr] 14 | const CONSTANT_TAG_FIELDREF: u8 = 9;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `try_from` has been stable since 1.34.0 and no longer requires an attribute to enable
[INFO] [stderr]  --> src/lib.rs:1:12
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(try_from)]
[INFO] [stderr]   |            ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(stable_features)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `class_file`
[INFO] [stderr]    --> src/main.rs:221:19
[INFO] [stderr]     |
[INFO] [stderr] 221 | fn print_bytecode(class_file: &ClassFile, code: &[(usize, Bytecode)]) {
[INFO] [stderr]     |                   ^^^^^^^^^^ help: consider prefixing with an underscore: `_class_file`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `class_file`
[INFO] [stderr]    --> src/main.rs:221:19
[INFO] [stderr]     |
[INFO] [stderr] 221 | fn print_bytecode(class_file: &ClassFile, code: &[(usize, Bytecode)]) {
[INFO] [stderr]     |                   ^^^^^^^^^^ help: consider prefixing with an underscore: `_class_file`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `CONSTANT_TAG_FIELDREF`
[INFO] [stderr]   --> src/writing.rs:14:1
[INFO] [stderr]    |
[INFO] [stderr] 14 | const CONSTANT_TAG_FIELDREF: u8 = 9;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `try_from` has been stable since 1.34.0 and no longer requires an attribute to enable
[INFO] [stderr]  --> src/lib.rs:1:12
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(try_from)]
[INFO] [stderr]   |            ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(stable_features)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.41s
[INFO] running `"docker" "inspect" "a6fac38a08304b8eefecc8f526574e1e44149dbcb5441cca5e494f9b5b732024"`
[INFO] running `"docker" "rm" "-f" "a6fac38a08304b8eefecc8f526574e1e44149dbcb5441cca5e494f9b5b732024"`
[INFO] [stdout] a6fac38a08304b8eefecc8f526574e1e44149dbcb5441cca5e494f9b5b732024