[INFO] fetching crate mate_selection 0.1.1...
[INFO] testing mate_selection-0.1.1 against master#562dee4820c458d823175268e41601d4c060588a for pr-154210-1
[INFO] extracting crate mate_selection 0.1.1 into /workspace/builds/worker-4-tc1/source
[INFO] started tweaking crates.io crate mate_selection 0.1.1
[INFO] finished tweaking crates.io crate mate_selection 0.1.1
[INFO] tweaked toml for crates.io crate mate_selection 0.1.1 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate mate_selection 0.1.1 on toolchain 562dee4820c458d823175268e41601d4c060588a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+562dee4820c458d823175268e41601d4c060588a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+562dee4820c458d823175268e41601d4c060588a" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 53 packages to latest compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+562dee4820c458d823175268e41601d4c060588a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded pyo3-macros v0.28.3
[INFO] [stderr]   Downloaded target-lexicon v0.13.5
[INFO] [stderr]   Downloaded pyo3-build-config v0.28.3
[INFO] [stderr]   Downloaded stochastic_universal_sampling v1.1.1
[INFO] [stderr]   Downloaded pyo3-ffi v0.28.3
[INFO] [stderr]   Downloaded pyo3-macros-backend v0.28.3
[INFO] [stderr]   Downloaded pyo3 v0.28.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+562dee4820c458d823175268e41601d4c060588a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 48e6b0e3edeac3a81b8b756c4ca393682e1656088a9d08426d6496c3ab72c0a8
[INFO] running `Command { std: "docker" "start" "-a" "48e6b0e3edeac3a81b8b756c4ca393682e1656088a9d08426d6496c3ab72c0a8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "48e6b0e3edeac3a81b8b756c4ca393682e1656088a9d08426d6496c3ab72c0a8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "48e6b0e3edeac3a81b8b756c4ca393682e1656088a9d08426d6496c3ab72c0a8", kill_on_drop: false }`
[INFO] [stdout] 48e6b0e3edeac3a81b8b756c4ca393682e1656088a9d08426d6496c3ab72c0a8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+562dee4820c458d823175268e41601d4c060588a" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 115208e06604698d0218c50eaf55f20a5a27ae9c406e2fa30130e66ff047e4ba
[INFO] running `Command { std: "docker" "start" "-a" "115208e06604698d0218c50eaf55f20a5a27ae9c406e2fa30130e66ff047e4ba", kill_on_drop: false }`
[INFO] [stderr]    Compiling getrandom v0.4.2
[INFO] [stderr]    Compiling serde v1.0.228
[INFO] [stderr]    Compiling rand v0.10.0
[INFO] [stderr]    Compiling stochastic_universal_sampling v1.1.1
[INFO] [stdout] error[E0599]: no method named `gen` found for mutable reference `&mut R` in the current scope
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/stochastic_universal_sampling-1.1.1/src/lib.rs:39:26
[INFO] [stdout]    |
[INFO] [stdout] 39 |     let arm_offset = rng.gen::<f64>() * arm_spacing;
[INFO] [stdout]    |                          ^^^ method not found in `&mut R`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0599`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `stochastic_universal_sampling` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "115208e06604698d0218c50eaf55f20a5a27ae9c406e2fa30130e66ff047e4ba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "115208e06604698d0218c50eaf55f20a5a27ae9c406e2fa30130e66ff047e4ba", kill_on_drop: false }`
[INFO] [stdout] 115208e06604698d0218c50eaf55f20a5a27ae9c406e2fa30130e66ff047e4ba