[INFO] fetching crate rabin_ida 0.1.3...
[INFO] checking rabin_ida-0.1.3 against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] extracting crate rabin_ida 0.1.3 into /workspace/builds/worker-2-tc1/source
[INFO] validating manifest of crates.io crate rabin_ida 0.1.3 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 rabin_ida 0.1.3
[INFO] finished tweaking crates.io crate rabin_ida 0.1.3
[INFO] tweaked toml for crates.io crate rabin_ida 0.1.3 written to /workspace/builds/worker-2-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 96 packages
[INFO] [stderr]       Adding bitflags v1.3.2 (latest: v2.5.0)
[INFO] [stderr]       Adding clap v2.34.0 (latest: v4.5.4)
[INFO] [stderr]       Adding criterion v0.3.6 (latest: v0.5.1)
[INFO] [stderr]       Adding criterion-plot v0.4.5 (latest: v0.5.0)
[INFO] [stderr]       Adding half v1.8.3 (latest: v2.4.0)
[INFO] [stderr]       Adding hermit-abi v0.1.19 (latest: v0.3.9)
[INFO] [stderr]       Adding itertools v0.10.5 (latest: v0.12.1)
[INFO] [stderr]       Adding linux-raw-sys v0.4.13 (latest: v0.6.4)
[INFO] [stderr]       Adding quick-error v1.2.3 (latest: v2.0.1)
[INFO] [stderr]       Adding structmeta v0.1.6 (latest: v0.3.0)
[INFO] [stderr]       Adding structmeta-derive v0.1.6 (latest: v0.3.0)
[INFO] [stderr]       Adding syn v1.0.109 (latest: v2.0.58)
[INFO] [stderr]       Adding test-strategy v0.2.1 (latest: v0.3.1)
[INFO] [stderr]       Adding textwrap v0.11.0 (latest: v0.16.1)
[INFO] [stderr]       Adding wasi v0.11.0+wasi-snapshot-preview1 (latest: v0.13.0+wasi-0.2.0)
[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 structmeta v0.1.6
[INFO] [stderr]   Downloaded structmeta-derive v0.1.6
[INFO] [stderr]   Downloaded test-strategy v0.2.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] d567e0c663d69a45696230b7db8e3891ca8f1e34bf79f11770e3fe52f29818dc
[INFO] running `Command { std: "docker" "start" "-a" "d567e0c663d69a45696230b7db8e3891ca8f1e34bf79f11770e3fe52f29818dc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d567e0c663d69a45696230b7db8e3891ca8f1e34bf79f11770e3fe52f29818dc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d567e0c663d69a45696230b7db8e3891ca8f1e34bf79f11770e3fe52f29818dc", kill_on_drop: false }`
[INFO] [stdout] d567e0c663d69a45696230b7db8e3891ca8f1e34bf79f11770e3fe52f29818dc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 1094cb671674a04d2fedd5fcfab94399fb75f8035f5b0f5a3afec8a18845fb7a
[INFO] running `Command { std: "docker" "start" "-a" "1094cb671674a04d2fedd5fcfab94399fb75f8035f5b0f5a3afec8a18845fb7a", kill_on_drop: false }`
[INFO] [stderr]    Compiling libm v0.2.8
[INFO] [stderr]    Compiling num-traits v0.2.18
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking getrandom v0.2.12
[INFO] [stderr]    Compiling rustix v0.38.32
[INFO] [stderr]     Checking linux-raw-sys v0.4.13
[INFO] [stderr]     Checking fastrand v2.0.2
[INFO] [stderr]     Checking ppv-lite86 v0.2.17
[INFO] [stderr]     Checking regex-automata v0.4.6
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking wait-timeout v0.2.0
[INFO] [stderr]     Checking bit-vec v0.6.3
[INFO] [stderr]     Checking rand_xorshift v0.3.0
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking bit-set v0.5.3
[INFO] [stderr]     Checking unarray v0.1.4
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rabin_ida v0.1.3 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stdout] warning: method `square` is never used
[INFO] [stdout]   --> src/gf.rs:55:8
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub trait Field:
[INFO] [stdout]    |           ----- method in this trait
[INFO] [stdout] ...
[INFO] [stdout] 55 |     fn square(&mut self) {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking plotters v0.3.5
[INFO] [stderr]     Checking regex v1.10.4
[INFO] [stderr]     Checking tempfile v3.10.1
[INFO] [stderr]     Checking criterion v0.3.6
[INFO] [stderr]     Checking rusty-fork v0.3.0
[INFO] [stderr]     Checking proptest v1.4.0
[INFO] [stderr]    Compiling structmeta-derive v0.1.6
[INFO] [stderr]    Compiling structmeta v0.1.6
[INFO] [stderr]    Compiling test-strategy v0.2.1
[INFO] [stdout] warning: method `square` is never used
[INFO] [stdout]   --> src/gf.rs:55:8
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub trait Field:
[INFO] [stdout]    |           ----- method in this trait
[INFO] [stdout] ...
[INFO] [stdout] 55 |     fn square(&mut self) {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 20.14s
[INFO] running `Command { std: "docker" "inspect" "1094cb671674a04d2fedd5fcfab94399fb75f8035f5b0f5a3afec8a18845fb7a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1094cb671674a04d2fedd5fcfab94399fb75f8035f5b0f5a3afec8a18845fb7a", kill_on_drop: false }`
[INFO] [stdout] 1094cb671674a04d2fedd5fcfab94399fb75f8035f5b0f5a3afec8a18845fb7a
[INFO] checking rabin_ida-0.1.3 against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] extracting crate rabin_ida 0.1.3 into /workspace/builds/worker-2-tc2/source
[INFO] validating manifest of crates.io crate rabin_ida 0.1.3 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 rabin_ida 0.1.3
[INFO] finished tweaking crates.io crate rabin_ida 0.1.3
[INFO] tweaked toml for crates.io crate rabin_ida 0.1.3 written to /workspace/builds/worker-2-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]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 96 packages
[INFO] [stderr]       Adding bitflags v1.3.2 (latest: v2.5.0)
[INFO] [stderr]       Adding clap v2.34.0 (latest: v4.5.4)
[INFO] [stderr]       Adding criterion v0.3.6 (latest: v0.5.1)
[INFO] [stderr]       Adding criterion-plot v0.4.5 (latest: v0.5.0)
[INFO] [stderr]       Adding half v1.8.3 (latest: v2.4.0)
[INFO] [stderr]       Adding hermit-abi v0.1.19 (latest: v0.3.9)
[INFO] [stderr]       Adding itertools v0.10.5 (latest: v0.12.1)
[INFO] [stderr]       Adding linux-raw-sys v0.4.13 (latest: v0.6.4)
[INFO] [stderr]       Adding quick-error v1.2.3 (latest: v2.0.1)
[INFO] [stderr]       Adding structmeta v0.1.6 (latest: v0.3.0)
[INFO] [stderr]       Adding structmeta-derive v0.1.6 (latest: v0.3.0)
[INFO] [stderr]       Adding syn v1.0.109 (latest: v2.0.58)
[INFO] [stderr]       Adding test-strategy v0.2.1 (latest: v0.3.1)
[INFO] [stderr]       Adding textwrap v0.11.0 (latest: v0.16.1)
[INFO] [stderr]       Adding wasi v0.11.0+wasi-snapshot-preview1 (latest: v0.13.0+wasi-0.2.0)
[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-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 3fc8ebd94e7a3cbe88b55e79cd6c55a4e71f6a6696e09568ed31088f22610729
[INFO] running `Command { std: "docker" "start" "-a" "3fc8ebd94e7a3cbe88b55e79cd6c55a4e71f6a6696e09568ed31088f22610729", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3fc8ebd94e7a3cbe88b55e79cd6c55a4e71f6a6696e09568ed31088f22610729", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3fc8ebd94e7a3cbe88b55e79cd6c55a4e71f6a6696e09568ed31088f22610729", kill_on_drop: false }`
[INFO] [stdout] 3fc8ebd94e7a3cbe88b55e79cd6c55a4e71f6a6696e09568ed31088f22610729
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 2c1e1b54de4f734eb0d9eb7dbc17a0b3a76a88e8b956d1384072fb88f6edcbc2
[INFO] running `Command { std: "docker" "start" "-a" "2c1e1b54de4f734eb0d9eb7dbc17a0b3a76a88e8b956d1384072fb88f6edcbc2", kill_on_drop: false }`
[INFO] [stderr]    Compiling libm v0.2.8
[INFO] [stderr]    Compiling num-traits v0.2.18
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking getrandom v0.2.12
[INFO] [stderr]    Compiling rustix v0.38.32
[INFO] [stderr]     Checking linux-raw-sys v0.4.13
[INFO] [stderr]     Checking fastrand v2.0.2
[INFO] [stderr]     Checking ppv-lite86 v0.2.17
[INFO] [stderr]     Checking regex-automata v0.4.6
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking wait-timeout v0.2.0
[INFO] [stderr]     Checking bit-vec v0.6.3
[INFO] [stderr]     Checking rand_xorshift v0.3.0
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking unarray v0.1.4
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking bit-set v0.5.3
[INFO] [stderr]     Checking rabin_ida v0.1.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: method `square` is never used
[INFO] [stdout]   --> src/gf.rs:55:8
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub trait Field:
[INFO] [stdout]    |           ----- method in this trait
[INFO] [stdout] ...
[INFO] [stdout] 55 |     fn square(&mut self) {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking plotters v0.3.5
[INFO] [stderr]     Checking regex v1.10.4
[INFO] [stderr]     Checking tempfile v3.10.1
[INFO] [stderr]     Checking criterion v0.3.6
[INFO] [stderr]     Checking rusty-fork v0.3.0
[INFO] [stderr]     Checking proptest v1.4.0
[INFO] [stderr]    Compiling structmeta-derive v0.1.6
[INFO] [stderr]    Compiling structmeta v0.1.6
[INFO] [stderr]    Compiling test-strategy v0.2.1
[INFO] [stdout] warning: method `square` is never used
[INFO] [stdout]   --> src/gf.rs:55:8
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub trait Field:
[INFO] [stdout]    |           ----- method in this trait
[INFO] [stdout] ...
[INFO] [stdout] 55 |     fn square(&mut self) {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 20.75s
[INFO] running `Command { std: "docker" "inspect" "2c1e1b54de4f734eb0d9eb7dbc17a0b3a76a88e8b956d1384072fb88f6edcbc2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2c1e1b54de4f734eb0d9eb7dbc17a0b3a76a88e8b956d1384072fb88f6edcbc2", kill_on_drop: false }`
[INFO] [stdout] 2c1e1b54de4f734eb0d9eb7dbc17a0b3a76a88e8b956d1384072fb88f6edcbc2