[INFO] cloning repository https://github.com/ExcaliburZero/jvm-class-file-parser
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ExcaliburZero/jvm-class-file-parser" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FExcaliburZero%2Fjvm-class-file-parser"`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FExcaliburZero%2Fjvm-class-file-parser'...
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 612bc50bcf238a451b8beb6b957f714a51d1602c
[INFO] checking ExcaliburZero/jvm-class-file-parser against master#2748a9fd93dd1a00a4521f4f16de5befbf77f6cd for pr-62262-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FExcaliburZero%2Fjvm-class-file-parser" "/workspace/builds/worker-9/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-9/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ExcaliburZero/jvm-class-file-parser on toolchain 2748a9fd93dd1a00a4521f4f16de5befbf77f6cd
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "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 /workspace/builds/worker-9/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 `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "MAP_USER_ID=0" "-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" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 7630bf549c416b964695e670eefc403309b299f69c5019072188146d56dc1c4c
[INFO] running `"docker" "start" "-a" "7630bf549c416b964695e670eefc403309b299f69c5019072188146d56dc1c4c"`
[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: 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]     Finished dev [unoptimized + debuginfo] target(s) in 3.79s
[INFO] running `"docker" "inspect" "7630bf549c416b964695e670eefc403309b299f69c5019072188146d56dc1c4c"`
[INFO] running `"docker" "rm" "-f" "7630bf549c416b964695e670eefc403309b299f69c5019072188146d56dc1c4c"`
[INFO] [stdout] 7630bf549c416b964695e670eefc403309b299f69c5019072188146d56dc1c4c