[INFO] cloning repository https://github.com/maidsafe/qjsonrpc
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/maidsafe/qjsonrpc" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmaidsafe%2Fqjsonrpc", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmaidsafe%2Fqjsonrpc'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 99f22730ee20c70fbcde37eaeaad0dc3bb3b4c48
[INFO] checking maidsafe/qjsonrpc against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmaidsafe%2Fqjsonrpc" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/maidsafe/qjsonrpc 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] removed /workspace/builds/worker-1-tc1/source/.cargo/config.toml
[INFO] started tweaking git repo https://github.com/maidsafe/qjsonrpc
[INFO] removed 0 missing examples
[INFO] finished tweaking git repo https://github.com/maidsafe/qjsonrpc
[INFO] tweaked toml for git repo https://github.com/maidsafe/qjsonrpc written to /workspace/builds/worker-1-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 159 packages
[INFO] [stderr]       Adding assert_fs v1.0.13 (latest: v1.1.1)
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[INFO] [stderr]       Adding owo-colors v3.5.0 (latest: v4.0.0)
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[INFO] [stderr]       Adding quinn v0.9.4 (latest: v0.10.2)
[INFO] [stderr]       Adding quinn-proto v0.9.6 (latest: v0.10.6)
[INFO] [stderr]       Adding quinn-udp v0.3.2 (latest: v0.4.1)
[INFO] [stderr]       Adding rcgen v0.10.0 (latest: v0.13.1)
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[INFO] [stderr]       Adding windows_i686_msvc v0.42.2 (latest: v0.52.4)
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[INFO] [stderr]       Adding windows_x86_64_gnullvm v0.48.5 (latest: v0.52.4)
[INFO] [stderr]       Adding windows_x86_64_msvc v0.42.2 (latest: v0.52.4)
[INFO] [stderr]       Adding windows_x86_64_msvc v0.48.5 (latest: v0.52.4)
[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 ...
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[INFO] [stderr]   Downloaded quinn v0.9.4
[INFO] [stderr]   Downloaded quinn-proto v0.9.6
[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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 139383e5698300619b8967080fd5bf61548f2bcd7808786ebb3d8998af70d5e3
[INFO] running `Command { std: "docker" "start" "-a" "139383e5698300619b8967080fd5bf61548f2bcd7808786ebb3d8998af70d5e3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "139383e5698300619b8967080fd5bf61548f2bcd7808786ebb3d8998af70d5e3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "139383e5698300619b8967080fd5bf61548f2bcd7808786ebb3d8998af70d5e3", kill_on_drop: false }`
[INFO] [stdout] 139383e5698300619b8967080fd5bf61548f2bcd7808786ebb3d8998af70d5e3
[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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f3b50b0537afe4bd460211b2600960a190d3e0b3bbebf571cecf29f867b20974
[INFO] running `Command { std: "docker" "start" "-a" "f3b50b0537afe4bd460211b2600960a190d3e0b3bbebf571cecf29f867b20974", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.153
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[INFO] [stderr]     Checking qjsonrpc v0.5.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `rand` is imported redundantly
[INFO] [stdout]   --> src/jsonrpc.rs:11:12
[INFO] [stdout]    |
[INFO] [stdout] 11 | use rand::{self, Rng};
[INFO] [stdout]    |            ^^^^ the item `rand` is already defined by prelude
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `rand` is imported redundantly
[INFO] [stdout]   --> src/jsonrpc.rs:11:12
[INFO] [stdout]    |
[INFO] [stdout] 11 | use rand::{self, Rng};
[INFO] [stdout]    |            ^^^^ the item `rand` is already defined by prelude
[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] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 25.85s
[INFO] running `Command { std: "docker" "inspect" "f3b50b0537afe4bd460211b2600960a190d3e0b3bbebf571cecf29f867b20974", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f3b50b0537afe4bd460211b2600960a190d3e0b3bbebf571cecf29f867b20974", kill_on_drop: false }`
[INFO] [stdout] f3b50b0537afe4bd460211b2600960a190d3e0b3bbebf571cecf29f867b20974