[INFO] fetching crate rug-polynomial 0.2.2...
[INFO] checking rug-polynomial-0.2.2 against 1.55.0 for beta-1.56-3
[INFO] extracting crate rug-polynomial 0.2.2 into /workspace/builds/worker-87/source
[INFO] validating manifest of crates.io crate rug-polynomial 0.2.2 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate rug-polynomial 0.2.2
[INFO] finished tweaking crates.io crate rug-polynomial 0.2.2
[INFO] tweaked toml for crates.io crate rug-polynomial 0.2.2 written to /workspace/builds/worker-87/source/Cargo.toml
[INFO] crate crates.io crate rug-polynomial 0.2.2 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded rug-fft v0.1.2
[INFO] [stderr]   Downloaded flint-sys v0.4.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-87/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-87/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" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 08bab904e476be7cd27493f324cc6ec13e20899510e2466001563ad83b678d06
[INFO] running `Command { std: "docker" "start" "-a" "08bab904e476be7cd27493f324cc6ec13e20899510e2466001563ad83b678d06", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "08bab904e476be7cd27493f324cc6ec13e20899510e2466001563ad83b678d06", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "08bab904e476be7cd27493f324cc6ec13e20899510e2466001563ad83b678d06", kill_on_drop: false }`
[INFO] [stdout] 08bab904e476be7cd27493f324cc6ec13e20899510e2466001563ad83b678d06
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-87/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-87/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" "+1.55.0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 34a02ba5d09daecf639cb119db7cb2114f8f8d3370d616e13b6b12bd04b0e52d
[INFO] running `Command { std: "docker" "start" "-a" "34a02ba5d09daecf639cb119db7cb2114f8f8d3370d616e13b6b12bd04b0e52d", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.102
[INFO] [stderr]    Compiling proc-macro2 v1.0.29
[INFO] [stderr]    Compiling syn v1.0.77
[INFO] [stderr]    Compiling gmp-mpfr-sys v1.4.7
[INFO] [stderr]    Compiling az v1.1.2
[INFO] [stderr]    Compiling rug v1.13.0
[INFO] [stderr]     Checking ppv-lite86 v0.2.10
[INFO] [stderr]    Compiling flint-sys v0.4.0
[INFO] [stderr]     Checking aho-corasick v0.7.18
[INFO] [stderr]     Checking regex v1.5.4
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]     Checking getrandom v0.1.16
[INFO] [stderr]     Checking env_logger v0.7.1
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking quickcheck v0.9.2
[INFO] [stderr]    Compiling serde_derive v1.0.130
[INFO] [stderr]    Compiling quickcheck_macros v0.9.1
[INFO] [stderr]     Checking serde v1.0.130
[INFO] [stderr]     Checking rug-fft v0.1.2
[INFO] [stderr]     Checking rug-polynomial v0.2.2 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared crate or module `flint_rs`
[INFO] [stdout]  --> benches/interp.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use flint_rs::mod_poly::ModPoly;
[INFO] [stdout]   |     ^^^^^^^^ use of undeclared crate or module `flint_rs`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type `ModPoly`
[INFO] [stdout]   --> benches/interp.rs:29:9
[INFO] [stdout]    |
[INFO] [stdout] 29 |         ModPoly::interpolate_from_mul_subgroup(ys.clone(), p.clone(), &w);
[INFO] [stdout]    |         ^^^^^^^ not found in this scope
[INFO] [stdout]    |
[INFO] [stdout] help: consider importing this struct
[INFO] [stdout]    |
[INFO] [stdout] 5  | use rug_polynomial::ModPoly;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> benches/interp.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(test)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0433, E0554.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0433`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rug-polynomial` due to 4 previous errors
[INFO] running `Command { std: "docker" "inspect" "34a02ba5d09daecf639cb119db7cb2114f8f8d3370d616e13b6b12bd04b0e52d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "34a02ba5d09daecf639cb119db7cb2114f8f8d3370d616e13b6b12bd04b0e52d", kill_on_drop: false }`
[INFO] [stdout] 34a02ba5d09daecf639cb119db7cb2114f8f8d3370d616e13b6b12bd04b0e52d
