[INFO] fetching crate challenge-bypass-ristretto 1.0.0-pre.0...
[INFO] checking challenge-bypass-ristretto-1.0.0-pre.0 against try#f47dd4da3ae8c32c9e65d307bfe640b143e674df for pr-77526
[INFO] extracting crate challenge-bypass-ristretto 1.0.0-pre.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate challenge-bypass-ristretto 1.0.0-pre.0 on toolchain f47dd4da3ae8c32c9e65d307bfe640b143e674df
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate challenge-bypass-ristretto 1.0.0-pre.0
[INFO] finished tweaking crates.io crate challenge-bypass-ristretto 1.0.0-pre.0
[INFO] tweaked toml for crates.io crate challenge-bypass-ristretto 1.0.0-pre.0 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "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] 6259d986c7359e9c2ecade2ffeb9c42086a8b692bfc0141aa1e0a185e5944fd8
[INFO] running `Command { std: "docker" "start" "-a" "6259d986c7359e9c2ecade2ffeb9c42086a8b692bfc0141aa1e0a185e5944fd8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6259d986c7359e9c2ecade2ffeb9c42086a8b692bfc0141aa1e0a185e5944fd8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6259d986c7359e9c2ecade2ffeb9c42086a8b692bfc0141aa1e0a185e5944fd8", kill_on_drop: false }`
[INFO] [stdout] 6259d986c7359e9c2ecade2ffeb9c42086a8b692bfc0141aa1e0a185e5944fd8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f2a77d95bd4e90beddf9aa15ebd7724979b523a324cb91720cded570914dc739
[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" "f2a77d95bd4e90beddf9aa15ebd7724979b523a324cb91720cded570914dc739", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v0.1.7
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]    Compiling rand_core v0.4.2
[INFO] [stderr]    Compiling subtle v2.3.0
[INFO] [stderr]     Checking rand_core v0.3.1
[INFO] [stderr]    Compiling clear_on_drop v0.2.4
[INFO] [stderr]     Checking rand_jitter v0.1.4
[INFO] [stderr]     Checking rand_hc v0.1.0
[INFO] [stderr]     Checking rand_xorshift v0.1.1
[INFO] [stderr]     Checking rand_isaac v0.1.1
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]     Checking block-buffer v0.7.3
[INFO] [stderr]     Checking base64 v0.9.3
[INFO] [stderr]     Checking sha2 v0.8.2
[INFO] [stderr]    Compiling curve25519-dalek v1.2.4
[INFO] [stderr]     Checking challenge-bypass-ristretto v1.0.0-pre.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0432]: unresolved import `rand::rngs::OsRng`
[INFO] [stdout]    --> src/oprf.rs:579:9
[INFO] [stdout]     |
[INFO] [stdout] 579 |     use rand::rngs::OsRng;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^ no `OsRng` in `rngs`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `rand::rngs::OsRng`
[INFO] [stdout]    --> src/dleq.rs:360:9
[INFO] [stdout]     |
[INFO] [stdout] 360 |     use rand::rngs::OsRng;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^ no `OsRng` in `rngs`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0432`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `challenge-bypass-ristretto`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "f2a77d95bd4e90beddf9aa15ebd7724979b523a324cb91720cded570914dc739", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f2a77d95bd4e90beddf9aa15ebd7724979b523a324cb91720cded570914dc739", kill_on_drop: false }`
[INFO] [stdout] f2a77d95bd4e90beddf9aa15ebd7724979b523a324cb91720cded570914dc739