[INFO] fetching crate twiggy-ir 0.7.0...
[INFO] testing twiggy-ir-0.7.0 against beta-2022-04-10 for beta-1.61-1
[INFO] extracting crate twiggy-ir 0.7.0 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate twiggy-ir 0.7.0 on toolchain beta-2022-04-10
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate twiggy-ir 0.7.0
[INFO] finished tweaking crates.io crate twiggy-ir 0.7.0
[INFO] tweaked toml for crates.io crate twiggy-ir 0.7.0 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] a0f093f7845803e3f7f539e0721f2d97385d1498fdf2efcf40c5ad8ab013a1d3
[INFO] running `Command { std: "docker" "start" "-a" "a0f093f7845803e3f7f539e0721f2d97385d1498fdf2efcf40c5ad8ab013a1d3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a0f093f7845803e3f7f539e0721f2d97385d1498fdf2efcf40c5ad8ab013a1d3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a0f093f7845803e3f7f539e0721f2d97385d1498fdf2efcf40c5ad8ab013a1d3", kill_on_drop: false }`
[INFO] [stdout] a0f093f7845803e3f7f539e0721f2d97385d1498fdf2efcf40c5ad8ab013a1d3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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=warn" "-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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 64fb07b9e5e59fe6c742f9e084dcc50de5abffca4e6c319d025e14f44dc3fe0c
[INFO] running `Command { std: "docker" "start" "-a" "64fb07b9e5e59fe6c742f9e084dcc50de5abffca4e6c319d025e14f44dc3fe0c", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling cpp_demangle v0.3.5
[INFO] [stderr]    Compiling frozen v1.0.0
[INFO] [stderr]    Compiling petgraph v0.6.0
[INFO] [stderr]    Compiling twiggy-ir v0.7.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field is never read: `roots`
[INFO] [stdout]    --> ir.rs:149:5
[INFO] [stdout]     |
[INFO] [stdout] 149 |     roots: Frozen<BTreeSet<Id>>,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] note: `Items` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    --> ir.rs:140:10
[INFO] [stdout]     |
[INFO] [stdout] 140 | #[derive(Debug)]
[INFO] [stdout]     |          ^^^^^
[INFO] [stdout]     = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 13.30s
[INFO] running `Command { std: "docker" "inspect" "64fb07b9e5e59fe6c742f9e084dcc50de5abffca4e6c319d025e14f44dc3fe0c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "64fb07b9e5e59fe6c742f9e084dcc50de5abffca4e6c319d025e14f44dc3fe0c", kill_on_drop: false }`
[INFO] [stdout] 64fb07b9e5e59fe6c742f9e084dcc50de5abffca4e6c319d025e14f44dc3fe0c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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=warn" "-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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 1f23e92bfb3258560a6078ea203aea598f0149d6cd9fd4e814fa3cfc18deddc7
[INFO] running `Command { std: "docker" "start" "-a" "1f23e92bfb3258560a6078ea203aea598f0149d6cd9fd4e814fa3cfc18deddc7", kill_on_drop: false }`
[INFO] [stdout] warning: field is never read: `roots`
[INFO] [stdout]    --> ir.rs:149:5
[INFO] [stdout]     |
[INFO] [stdout] 149 |     roots: Frozen<BTreeSet<Id>>,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] note: `Items` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    --> ir.rs:140:10
[INFO] [stdout]     |
[INFO] [stdout] 140 | #[derive(Debug)]
[INFO] [stdout]     |          ^^^^^
[INFO] [stdout]     = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling twiggy-ir v0.7.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field is never read: `roots`
[INFO] [stdout]    --> ir.rs:149:5
[INFO] [stdout]     |
[INFO] [stdout] 149 |     roots: Frozen<BTreeSet<Id>>,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] note: `Items` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    --> ir.rs:140:10
[INFO] [stdout]     |
[INFO] [stdout] 140 | #[derive(Debug)]
[INFO] [stdout]     |          ^^^^^
[INFO] [stdout]     = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.41s
[INFO] [stderr]   Executable unittests ir.rs (/opt/rustwide/target/debug/deps/twiggy_ir-ddb65933651338f9)
[INFO] running `Command { std: "docker" "inspect" "1f23e92bfb3258560a6078ea203aea598f0149d6cd9fd4e814fa3cfc18deddc7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1f23e92bfb3258560a6078ea203aea598f0149d6cd9fd4e814fa3cfc18deddc7", kill_on_drop: false }`
[INFO] [stdout] 1f23e92bfb3258560a6078ea203aea598f0149d6cd9fd4e814fa3cfc18deddc7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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=warn" "-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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 0ff590a42a90f5b065ee9380fef0157e58eb0502c355088edda17b2609a72500
[INFO] running `Command { std: "docker" "start" "-a" "0ff590a42a90f5b065ee9380fef0157e58eb0502c355088edda17b2609a72500", kill_on_drop: false }`
[INFO] [stdout] 
[INFO] [stderr] warning: field is never read: `roots`
[INFO] [stdout] running 0 tests
[INFO] [stderr]    --> ir.rs:149:5
[INFO] [stdout] 
[INFO] [stderr]     |
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stderr] 149 |     roots: Frozen<BTreeSet<Id>>,
[INFO] [stdout] 
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] note: `Items` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr]    --> ir.rs:140:10
[INFO] [stderr]     |
[INFO] [stderr] 140 | #[derive(Debug)]
[INFO] [stderr]     |          ^^^^^
[INFO] [stderr]     = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: `twiggy-ir` (lib) generated 1 warning
[INFO] [stderr] warning: `twiggy-ir` (lib test) generated 1 warning (1 duplicate)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running unittests ir.rs (/opt/rustwide/target/debug/deps/twiggy_ir-ddb65933651338f9)
[INFO] [stderr]    Doc-tests twiggy-ir
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "0ff590a42a90f5b065ee9380fef0157e58eb0502c355088edda17b2609a72500", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0ff590a42a90f5b065ee9380fef0157e58eb0502c355088edda17b2609a72500", kill_on_drop: false }`
[INFO] [stdout] 0ff590a42a90f5b065ee9380fef0157e58eb0502c355088edda17b2609a72500