[INFO] fetching crate j4rs 0.20.0...
[INFO] checking j4rs-0.20.0 against master#ab869e094a907cc5d19b4080f22eccaf347f1f95 for pr-129604
[INFO] extracting crate j4rs 0.20.0 into /workspace/builds/worker-7-tc1/source
[INFO] validating manifest of crates.io crate j4rs 0.20.0 on toolchain ab869e094a907cc5d19b4080f22eccaf347f1f95
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate j4rs 0.20.0
[INFO] finished tweaking crates.io crate j4rs 0.20.0
[INFO] tweaked toml for crates.io crate j4rs 0.20.0 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
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[INFO] [stderr]      Locking 169 packages to latest compatible versions
[INFO] [stderr]       Adding addr2line v0.22.0 (latest: v0.24.1)
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[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b0d4da4302cc584133e0b71d8a9ef6f124c9db24a1165e28e70d675600f3d6f6
[INFO] running `Command { std: "docker" "start" "-a" "b0d4da4302cc584133e0b71d8a9ef6f124c9db24a1165e28e70d675600f3d6f6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b0d4da4302cc584133e0b71d8a9ef6f124c9db24a1165e28e70d675600f3d6f6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b0d4da4302cc584133e0b71d8a9ef6f124c9db24a1165e28e70d675600f3d6f6", kill_on_drop: false }`
[INFO] [stdout] b0d4da4302cc584133e0b71d8a9ef6f124c9db24a1165e28e70d675600f3d6f6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 23cc2e920973d4c5d48ff0da1fdbfa3d74e520f53360bcf3c6a98d0daf5f2b12
[INFO] running `Command { std: "docker" "start" "-a" "23cc2e920973d4c5d48ff0da1fdbfa3d74e520f53360bcf3c6a98d0daf5f2b12", kill_on_drop: false }`
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[INFO] [stderr]    Compiling parking_lot_core v0.9.10
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[INFO] [stderr]    Compiling j4rs v0.20.0 (/opt/rustwide/workdir)
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[INFO] [stdout] warning: function `do_instance_creation` is never used
[INFO] [stdout]   --> benches/j4rs_benchmark.rs:11:4
[INFO] [stdout]    |
[INFO] [stdout] 11 | fn do_instance_creation(jvm: &Jvm) -> Instance {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `do_invocation_w_no_args` is never used
[INFO] [stdout]   --> benches/j4rs_benchmark.rs:16:4
[INFO] [stdout]    |
[INFO] [stdout] 16 | fn do_invocation_w_no_args(jvm: &Jvm, instance: &Instance) -> Instance {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `do_invocation_w_string_args` is never used
[INFO] [stdout]   --> benches/j4rs_benchmark.rs:20:4
[INFO] [stdout]    |
[INFO] [stdout] 20 | fn do_invocation_w_string_args(jvm: &Jvm, instance: &Instance) -> Instance {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `do_invocation_w_integer_args` is never used
[INFO] [stdout]   --> benches/j4rs_benchmark.rs:29:4
[INFO] [stdout]    |
[INFO] [stdout] 29 | fn do_invocation_w_integer_args(jvm: &Jvm, instance: &Instance) -> Instance {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `do_invocation_w_string_args_and_to_rust` is never used
[INFO] [stdout]   --> benches/j4rs_benchmark.rs:38:4
[INFO] [stdout]    |
[INFO] [stdout] 38 | fn do_invocation_w_string_args_and_to_rust(jvm: &Jvm, instance: &Instance) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `j4rs_benchmark` is never used
[INFO] [stdout]   --> benches/j4rs_benchmark.rs:89:4
[INFO] [stdout]    |
[INFO] [stdout] 89 | fn j4rs_benchmark(c: &mut Criterion) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 15.00s
[INFO] running `Command { std: "docker" "inspect" "23cc2e920973d4c5d48ff0da1fdbfa3d74e520f53360bcf3c6a98d0daf5f2b12", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "23cc2e920973d4c5d48ff0da1fdbfa3d74e520f53360bcf3c6a98d0daf5f2b12", kill_on_drop: false }`
[INFO] [stdout] 23cc2e920973d4c5d48ff0da1fdbfa3d74e520f53360bcf3c6a98d0daf5f2b12