[INFO] fetching crate proofsize_derive 0.1.0...
[INFO] testing proofsize_derive-0.1.0 against beta-2021-09-08 for beta-1.56-1
[INFO] extracting crate proofsize_derive 0.1.0 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate proofsize_derive 0.1.0 on toolchain beta-2021-09-08
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate proofsize_derive 0.1.0
[INFO] finished tweaking crates.io crate proofsize_derive 0.1.0
[INFO] tweaked toml for crates.io crate proofsize_derive 0.1.0 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "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-2021-09-08" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "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] 684eb85c7c6b2546b828f3c5f47f11b63099f16a1ac3195f915d8c3e29de44fa
[INFO] running `Command { std: "docker" "start" "-a" "684eb85c7c6b2546b828f3c5f47f11b63099f16a1ac3195f915d8c3e29de44fa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "684eb85c7c6b2546b828f3c5f47f11b63099f16a1ac3195f915d8c3e29de44fa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "684eb85c7c6b2546b828f3c5f47f11b63099f16a1ac3195f915d8c3e29de44fa", kill_on_drop: false }`
[INFO] [stdout] 684eb85c7c6b2546b828f3c5f47f11b63099f16a1ac3195f915d8c3e29de44fa
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "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] e50194c5743be40afb358ca8c90bd3f84a63a2e7c06ccfeb670b233bc4a0e751
[INFO] running `Command { std: "docker" "start" "-a" "e50194c5743be40afb358ca8c90bd3f84a63a2e7c06ccfeb670b233bc4a0e751", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.76
[INFO] [stderr]    Compiling synstructure v0.12.5
[INFO] [stderr]    Compiling proofsize_derive v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/lib.rs:8:21
[INFO] [stdout]   |
[INFO] [stdout] 8 | fn derive_proofsize(mut s: synstructure::Structure) -> proc_macro2::TokenStream {
[INFO] [stdout]   |                     ----^
[INFO] [stdout]   |                     |
[INFO] [stdout]   |                     help: remove this `mut`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 8.98s
[INFO] running `Command { std: "docker" "inspect" "e50194c5743be40afb358ca8c90bd3f84a63a2e7c06ccfeb670b233bc4a0e751", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e50194c5743be40afb358ca8c90bd3f84a63a2e7c06ccfeb670b233bc4a0e751", kill_on_drop: false }`
[INFO] [stdout] e50194c5743be40afb358ca8c90bd3f84a63a2e7c06ccfeb670b233bc4a0e751
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f49937cf31c7d2288a475f641a733dcc3c853840ccc6dcc52f45a4d51e69e4ad
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "f49937cf31c7d2288a475f641a733dcc3c853840ccc6dcc52f45a4d51e69e4ad", kill_on_drop: false }`
[INFO] [stderr]    Compiling proofsize_derive v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/lib.rs:8:21
[INFO] [stdout]   |
[INFO] [stdout] 8 | fn derive_proofsize(mut s: synstructure::Structure) -> proc_macro2::TokenStream {
[INFO] [stdout]   |                     ----^
[INFO] [stdout]   |                     |
[INFO] [stdout]   |                     help: remove this `mut`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/lib.rs:8:21
[INFO] [stdout]   |
[INFO] [stdout] 8 | fn derive_proofsize(mut s: synstructure::Structure) -> proc_macro2::TokenStream {
[INFO] [stdout]   |                     ----^
[INFO] [stdout]   |                     |
[INFO] [stdout]   |                     help: remove this `mut`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0463]: can't find crate for `rug_binserial`
[INFO] [stdout]   --> tests/test.rs:12:14
[INFO] [stdout]    |
[INFO] [stdout] 12 |     #[derive(ProofSize)]
[INFO] [stdout]    |              ^^^^^^^^^ can't find crate
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in the derive macro `ProofSize` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0463`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `proofsize_derive` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "f49937cf31c7d2288a475f641a733dcc3c853840ccc6dcc52f45a4d51e69e4ad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f49937cf31c7d2288a475f641a733dcc3c853840ccc6dcc52f45a4d51e69e4ad", kill_on_drop: false }`
[INFO] [stdout] f49937cf31c7d2288a475f641a733dcc3c853840ccc6dcc52f45a4d51e69e4ad