[INFO] fetching crate nyoom-json 0.3.0...
[INFO] checking nyoom-json-0.3.0 against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] extracting crate nyoom-json 0.3.0 into /workspace/builds/worker-0-tc1/source
[INFO] validating manifest of crates.io crate nyoom-json 0.3.0 on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate nyoom-json 0.3.0
[INFO] finished tweaking crates.io crate nyoom-json 0.3.0
[INFO] tweaked toml for crates.io crate nyoom-json 0.3.0 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 72 packages
[INFO] [stderr]       Adding anes v0.1.6 (latest: v0.2.0)
[INFO] [stderr]       Adding bitflags v1.3.2 (latest: v2.5.0)
[INFO] [stderr]       Adding clap v3.2.25 (latest: v4.5.4)
[INFO] [stderr]       Adding clap_lex v0.2.4 (latest: v0.7.0)
[INFO] [stderr]       Adding criterion v0.4.0 (latest: v0.5.1)
[INFO] [stderr]       Adding hashbrown v0.12.3 (latest: v0.14.3)
[INFO] [stderr]       Adding heck v0.4.1 (latest: v0.5.0)
[INFO] [stderr]       Adding hermit-abi v0.1.19 (latest: v0.3.9)
[INFO] [stderr]       Adding indexmap v1.9.3 (latest: v2.2.6)
[INFO] [stderr]       Adding itertools v0.10.5 (latest: v0.12.1)
[INFO] [stderr]       Adding os_str_bytes v6.6.1 (latest: v7.0.0)
[INFO] [stderr]       Adding strum v0.24.1 (latest: v0.26.2)
[INFO] [stderr]       Adding strum_macros v0.24.3 (latest: v0.26.2)
[INFO] [stderr]       Adding syn v1.0.109 (latest: v2.0.58)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded sealed v0.5.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7fcada26b1127e98c9f3ef121bef1f658cd1d432ccc65ae38c5732c1657d3955
[INFO] running `Command { std: "docker" "start" "-a" "7fcada26b1127e98c9f3ef121bef1f658cd1d432ccc65ae38c5732c1657d3955", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7fcada26b1127e98c9f3ef121bef1f658cd1d432ccc65ae38c5732c1657d3955", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7fcada26b1127e98c9f3ef121bef1f658cd1d432ccc65ae38c5732c1657d3955", kill_on_drop: false }`
[INFO] [stdout] 7fcada26b1127e98c9f3ef121bef1f658cd1d432ccc65ae38c5732c1657d3955
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 47805a01f8192b76220a9517d3b5cfe87428523fed0708cfe694b31f26bdd532
[INFO] running `Command { std: "docker" "start" "-a" "47805a01f8192b76220a9517d3b5cfe87428523fed0708cfe694b31f26bdd532", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.197
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking half v2.4.0
[INFO] [stderr]     Checking ciborium-io v0.2.2
[INFO] [stderr]     Checking criterion-plot v0.5.0
[INFO] [stderr]     Checking anes v0.1.6
[INFO] [stderr]     Checking clap v3.2.25
[INFO] [stderr]    Compiling sealed v0.5.0
[INFO] [stderr]     Checking ciborium-ll v0.2.2
[INFO] [stderr]     Checking nyoom-json v0.3.0 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling strum_macros v0.24.3
[INFO] [stderr]     Checking serde_json v1.0.115
[INFO] [stderr]     Checking ciborium v0.2.2
[INFO] [stderr]     Checking tinytemplate v1.2.1
[INFO] [stderr]     Checking criterion v0.4.0
[INFO] [stderr]     Checking strum v0.24.1
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> benches/serialize.rs:167:13
[INFO] [stdout]     |
[INFO] [stdout] 167 |             serde_json::to_writer(&mut out, &anime);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 167 |             let _ = serde_json::to_writer(&mut out, &anime);
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 6.26s
[INFO] running `Command { std: "docker" "inspect" "47805a01f8192b76220a9517d3b5cfe87428523fed0708cfe694b31f26bdd532", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "47805a01f8192b76220a9517d3b5cfe87428523fed0708cfe694b31f26bdd532", kill_on_drop: false }`
[INFO] [stdout] 47805a01f8192b76220a9517d3b5cfe87428523fed0708cfe694b31f26bdd532
[INFO] checking nyoom-json-0.3.0 against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] extracting crate nyoom-json 0.3.0 into /workspace/builds/worker-0-tc2/source
[INFO] validating manifest of crates.io crate nyoom-json 0.3.0 on toolchain 2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate nyoom-json 0.3.0
[INFO] finished tweaking crates.io crate nyoom-json 0.3.0
[INFO] tweaked toml for crates.io crate nyoom-json 0.3.0 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 72 packages
[INFO] [stderr]       Adding anes v0.1.6 (latest: v0.2.0)
[INFO] [stderr]       Adding bitflags v1.3.2 (latest: v2.5.0)
[INFO] [stderr]       Adding clap v3.2.25 (latest: v4.5.4)
[INFO] [stderr]       Adding clap_lex v0.2.4 (latest: v0.7.0)
[INFO] [stderr]       Adding criterion v0.4.0 (latest: v0.5.1)
[INFO] [stderr]       Adding hashbrown v0.12.3 (latest: v0.14.3)
[INFO] [stderr]       Adding heck v0.4.1 (latest: v0.5.0)
[INFO] [stderr]       Adding hermit-abi v0.1.19 (latest: v0.3.9)
[INFO] [stderr]       Adding indexmap v1.9.3 (latest: v2.2.6)
[INFO] [stderr]       Adding itertools v0.10.5 (latest: v0.12.1)
[INFO] [stderr]       Adding os_str_bytes v6.6.1 (latest: v7.0.0)
[INFO] [stderr]       Adding strum v0.24.1 (latest: v0.26.2)
[INFO] [stderr]       Adding strum_macros v0.24.3 (latest: v0.26.2)
[INFO] [stderr]       Adding syn v1.0.109 (latest: v2.0.58)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d0e24aa043d4a9cfe27aae3a4bd54dce4a0acd84281ba16af7868bd502d2e348
[INFO] running `Command { std: "docker" "start" "-a" "d0e24aa043d4a9cfe27aae3a4bd54dce4a0acd84281ba16af7868bd502d2e348", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d0e24aa043d4a9cfe27aae3a4bd54dce4a0acd84281ba16af7868bd502d2e348", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d0e24aa043d4a9cfe27aae3a4bd54dce4a0acd84281ba16af7868bd502d2e348", kill_on_drop: false }`
[INFO] [stdout] d0e24aa043d4a9cfe27aae3a4bd54dce4a0acd84281ba16af7868bd502d2e348
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f6309989b352136e2093f3a267dfcac98444a70ed6741d71754cbe1714eba8a0
[INFO] running `Command { std: "docker" "start" "-a" "f6309989b352136e2093f3a267dfcac98444a70ed6741d71754cbe1714eba8a0", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.197
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking half v2.4.0
[INFO] [stderr]     Checking ciborium-io v0.2.2
[INFO] [stderr]     Checking anes v0.1.6
[INFO] [stderr]     Checking criterion-plot v0.5.0
[INFO] [stderr]     Checking clap v3.2.25
[INFO] [stderr]    Compiling sealed v0.5.0
[INFO] [stderr]     Checking ciborium-ll v0.2.2
[INFO] [stderr]     Checking nyoom-json v0.3.0 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling strum_macros v0.24.3
[INFO] [stderr]     Checking serde_json v1.0.115
[INFO] [stderr]     Checking ciborium v0.2.2
[INFO] [stderr]     Checking strum v0.24.1
[INFO] [stderr]     Checking tinytemplate v1.2.1
[INFO] [stderr]     Checking criterion v0.4.0
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> benches/serialize.rs:167:13
[INFO] [stdout]     |
[INFO] [stdout] 167 |             serde_json::to_writer(&mut out, &anime);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 167 |             let _ = serde_json::to_writer(&mut out, &anime);
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 9.29s
[INFO] running `Command { std: "docker" "inspect" "f6309989b352136e2093f3a267dfcac98444a70ed6741d71754cbe1714eba8a0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f6309989b352136e2093f3a267dfcac98444a70ed6741d71754cbe1714eba8a0", kill_on_drop: false }`
[INFO] [stdout] f6309989b352136e2093f3a267dfcac98444a70ed6741d71754cbe1714eba8a0