[INFO] fetching crate halo2_gadgets 0.3.1...
[INFO] checking halo2_gadgets-0.3.1 against master#8c32e313cccf7df531e2d49ffb8227bb92304aee for pr-145608-1
[INFO] extracting crate halo2_gadgets 0.3.1 into /workspace/builds/worker-1-tc1/source
[INFO] started tweaking crates.io crate halo2_gadgets 0.3.1
[INFO] finished tweaking crates.io crate halo2_gadgets 0.3.1
[INFO] tweaked toml for crates.io crate halo2_gadgets 0.3.1 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate halo2_gadgets 0.3.1 on toolchain 8c32e313cccf7df531e2d49ffb8227bb92304aee
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8c32e313cccf7df531e2d49ffb8227bb92304aee" "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" "+8c32e313cccf7df531e2d49ffb8227bb92304aee" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
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[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8c32e313cccf7df531e2d49ffb8227bb92304aee" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+8c32e313cccf7df531e2d49ffb8227bb92304aee" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 045d6b4a7302f47afcca0c6b019884c6c6f98708a64127cfc34ff322d008e0db
[INFO] running `Command { std: "docker" "start" "-a" "045d6b4a7302f47afcca0c6b019884c6c6f98708a64127cfc34ff322d008e0db", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "045d6b4a7302f47afcca0c6b019884c6c6f98708a64127cfc34ff322d008e0db", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "045d6b4a7302f47afcca0c6b019884c6c6f98708a64127cfc34ff322d008e0db", kill_on_drop: false }`
[INFO] [stdout] 045d6b4a7302f47afcca0c6b019884c6c6f98708a64127cfc34ff322d008e0db
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+8c32e313cccf7df531e2d49ffb8227bb92304aee" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5faeb7f0032e7e16a4835c3c99c8f0c8012a80a55e1051ac652a8f6e4644030b
[INFO] running `Command { std: "docker" "start" "-a" "5faeb7f0032e7e16a4835c3c99c8f0c8012a80a55e1051ac652a8f6e4644030b", kill_on_drop: false }`
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[INFO] [stderr]     Checking proptest v1.7.0
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[INFO] [stderr]     Checking halo2_gadgets v0.3.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0599]: the method `next_u64` exists for struct `OsRng`, but its trait bounds were not satisfied
[INFO] [stdout]    --> src/utilities.rs:460:27
[INFO] [stdout]     |
[INFO] [stdout] 460 |             let int = rng.next_u64();
[INFO] [stdout]     |                           ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]    ::: /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/rand_core-0.6.4/src/os.rs:48:1
[INFO] [stdout]     |
[INFO] [stdout]  48 | pub struct OsRng;
[INFO] [stdout]     | ---------------- doesn't satisfy `OsRng: DerefMut`, `OsRng: Deref` or `OsRng: proptest::prelude::RngCore`
[INFO] [stdout]     |
[INFO] [stdout]     = note: the following trait bounds were not satisfied:
[INFO] [stdout]             `OsRng: DerefMut`
[INFO] [stdout]             which is required by `OsRng: proptest::prelude::RngCore`
[INFO] [stdout]             `OsRng: Deref`
[INFO] [stdout]             which is required by `OsRng: proptest::prelude::RngCore`
[INFO] [stdout]     = help: items from traits can only be used if the trait is in scope
[INFO] [stdout] help: trait `RngCore` which provides `next_u64` is implemented but not in scope; perhaps you want to import it
[INFO] [stdout]     |
[INFO] [stdout] 242 +     use rand::RngCore;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0599`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `halo2_gadgets` (lib test) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "5faeb7f0032e7e16a4835c3c99c8f0c8012a80a55e1051ac652a8f6e4644030b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5faeb7f0032e7e16a4835c3c99c8f0c8012a80a55e1051ac652a8f6e4644030b", kill_on_drop: false }`
[INFO] [stdout] 5faeb7f0032e7e16a4835c3c99c8f0c8012a80a55e1051ac652a8f6e4644030b