[INFO] fetching crate drng 0.2.0...
[INFO] checking drng-0.2.0 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate drng 0.2.0 into /workspace/builds/worker-3-tc1/source
[INFO] validating manifest of crates.io crate drng 0.2.0 on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate drng 0.2.0
[INFO] finished tweaking crates.io crate drng 0.2.0
[INFO] tweaked toml for crates.io crate drng 0.2.0 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 22 packages
[INFO] [stderr]       Adding env_logger v0.8.4 (latest: v0.11.3)
[INFO] [stderr]       Adding syn v1.0.109 (latest: v2.0.58)
[INFO] [stderr]       Adding wasi v0.11.0+wasi-snapshot-preview1 (latest: v0.13.0+wasi-0.2.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded quickcheck_macros v1.0.0
[INFO] [stderr]   Downloaded quickcheck v1.0.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c4d3b889a220d12617e92c8fb30a6b4556e0c1a1ef4b74f95083039133beb33f
[INFO] running `Command { std: "docker" "start" "-a" "c4d3b889a220d12617e92c8fb30a6b4556e0c1a1ef4b74f95083039133beb33f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c4d3b889a220d12617e92c8fb30a6b4556e0c1a1ef4b74f95083039133beb33f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c4d3b889a220d12617e92c8fb30a6b4556e0c1a1ef4b74f95083039133beb33f", kill_on_drop: false }`
[INFO] [stdout] c4d3b889a220d12617e92c8fb30a6b4556e0c1a1ef4b74f95083039133beb33f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 88cb31c31623b905749b545b32196a14712873c06b21f7acd9b441d318518340
[INFO] running `Command { std: "docker" "start" "-a" "88cb31c31623b905749b545b32196a14712873c06b21f7acd9b441d318518340", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking env_logger v0.8.4
[INFO] [stderr]     Checking quickcheck v1.0.3
[INFO] [stderr]     Checking drng v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `payload_range::PayloadRange`
[INFO] [stdout]  --> src/range/mod.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub use payload_range::PayloadRange;
[INFO] [stdout]   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling quickcheck_macros v1.0.0
[INFO] [stdout] warning: unused import: `payload_range::PayloadRange`
[INFO] [stdout]  --> src/range/mod.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub use payload_range::PayloadRange;
[INFO] [stdout]   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Rng` is imported redundantly
[INFO] [stdout]    --> src/lib.rs:196:28
[INFO] [stdout]     |
[INFO] [stdout] 194 |     use super::*;
[INFO] [stdout]     |         -------- the item `Rng` is already imported here
[INFO] [stdout] 195 |     use quickcheck::{quickcheck, TestResult};
[INFO] [stdout] 196 |     use rand::{thread_rng, Rng};
[INFO] [stdout]     |                            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.04s
[INFO] running `Command { std: "docker" "inspect" "88cb31c31623b905749b545b32196a14712873c06b21f7acd9b441d318518340", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "88cb31c31623b905749b545b32196a14712873c06b21f7acd9b441d318518340", kill_on_drop: false }`
[INFO] [stdout] 88cb31c31623b905749b545b32196a14712873c06b21f7acd9b441d318518340
[INFO] checking drng-0.2.0 against try#645bb72776a6a56a1a8f52631a44bd082b2ba509 for absurd-question-mark-desugar
[INFO] extracting crate drng 0.2.0 into /workspace/builds/worker-3-tc2/source
[INFO] validating manifest of crates.io crate drng 0.2.0 on toolchain 645bb72776a6a56a1a8f52631a44bd082b2ba509
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate drng 0.2.0
[INFO] finished tweaking crates.io crate drng 0.2.0
[INFO] tweaked toml for crates.io crate drng 0.2.0 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1e8ee72965e069d91d3087ae8fe260f9c50516798e0618d6df4de99f4b54f210
[INFO] running `Command { std: "docker" "start" "-a" "1e8ee72965e069d91d3087ae8fe260f9c50516798e0618d6df4de99f4b54f210", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1e8ee72965e069d91d3087ae8fe260f9c50516798e0618d6df4de99f4b54f210", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1e8ee72965e069d91d3087ae8fe260f9c50516798e0618d6df4de99f4b54f210", kill_on_drop: false }`
[INFO] [stdout] 1e8ee72965e069d91d3087ae8fe260f9c50516798e0618d6df4de99f4b54f210
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d85a86fecb11119aec54d46fe839bfe3dfec8eae40e04a1283bbc57d1f2d474a
[INFO] running `Command { std: "docker" "start" "-a" "d85a86fecb11119aec54d46fe839bfe3dfec8eae40e04a1283bbc57d1f2d474a", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking env_logger v0.8.4
[INFO] [stderr]     Checking quickcheck v1.0.3
[INFO] [stderr]     Checking drng v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `payload_range::PayloadRange`
[INFO] [stdout]  --> src/range/mod.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub use payload_range::PayloadRange;
[INFO] [stdout]   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling quickcheck_macros v1.0.0
[INFO] [stdout] warning: unused import: `payload_range::PayloadRange`
[INFO] [stdout]  --> src/range/mod.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub use payload_range::PayloadRange;
[INFO] [stdout]   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Rng` is imported redundantly
[INFO] [stdout]    --> src/lib.rs:196:28
[INFO] [stdout]     |
[INFO] [stdout] 194 |     use super::*;
[INFO] [stdout]     |         -------- the item `Rng` is already imported here
[INFO] [stdout] 195 |     use quickcheck::{quickcheck, TestResult};
[INFO] [stdout] 196 |     use rand::{thread_rng, Rng};
[INFO] [stdout]     |                            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.40s
[INFO] running `Command { std: "docker" "inspect" "d85a86fecb11119aec54d46fe839bfe3dfec8eae40e04a1283bbc57d1f2d474a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d85a86fecb11119aec54d46fe839bfe3dfec8eae40e04a1283bbc57d1f2d474a", kill_on_drop: false }`
[INFO] [stdout] d85a86fecb11119aec54d46fe839bfe3dfec8eae40e04a1283bbc57d1f2d474a