[INFO] fetching crate crates-io-proxy 0.2.0...
[INFO] checking crates-io-proxy-0.2.0 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate crates-io-proxy 0.2.0 into /workspace/builds/worker-0-tc1/source
[INFO] validating manifest of crates.io crate crates-io-proxy 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 crates-io-proxy 0.2.0
[INFO] finished tweaking crates.io crate crates-io-proxy 0.2.0
[INFO] tweaked toml for crates.io crate crates-io-proxy 0.2.0 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate crates.io crate crates-io-proxy 0.2.0 already has a lockfile, it will not be regenerated
[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]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded flate2 v1.0.26
[INFO] [stderr]   Downloaded pico-args v0.5.0
[INFO] [stderr]   Downloaded chunked_transfer v1.4.1
[INFO] [stderr]   Downloaded tiny_http v0.12.0
[INFO] [stderr]   Downloaded ureq v2.7.1
[INFO] [stderr]   Downloaded rustls-webpki v0.101.3
[INFO] [stderr]   Downloaded rustls v0.21.6
[INFO] [stderr]   Downloaded webpki-roots v0.23.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 6ec1010b38482762bf4511df65f74be922b0f68b64e5d0817db0531b3ab59ae4
[INFO] running `Command { std: "docker" "start" "-a" "6ec1010b38482762bf4511df65f74be922b0f68b64e5d0817db0531b3ab59ae4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6ec1010b38482762bf4511df65f74be922b0f68b64e5d0817db0531b3ab59ae4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6ec1010b38482762bf4511df65f74be922b0f68b64e5d0817db0531b3ab59ae4", kill_on_drop: false }`
[INFO] [stdout] 6ec1010b38482762bf4511df65f74be922b0f68b64e5d0817db0531b3ab59ae4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] bc2104482eaa47d273624031a45430be06653b4f671d49c7c2f2b1f3e6f3e598
[INFO] running `Command { std: "docker" "start" "-a" "bc2104482eaa47d273624031a45430be06653b4f671d49c7c2f2b1f3e6f3e598", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.147
[INFO] [stderr]    Compiling crc32fast v1.3.2
[INFO] [stderr]     Checking log v0.4.19
[INFO] [stderr]    Compiling rustls v0.21.6
[INFO] [stderr]     Checking ascii v1.1.0
[INFO] [stderr]     Checking miniz_oxide v0.7.1
[INFO] [stderr]     Checking chunked_transfer v1.4.1
[INFO] [stderr]     Checking pico-args v0.5.0
[INFO] [stderr]     Checking env_logger v0.10.0
[INFO] [stderr]     Checking tiny_http v0.12.0
[INFO] [stderr]     Checking flate2 v1.0.26
[INFO] [stderr]    Compiling cc v1.0.82
[INFO] [stderr]    Compiling ring v0.16.20
[INFO] [stderr]     Checking rustls-webpki v0.101.3
[INFO] [stderr]     Checking rustls-webpki v0.100.1
[INFO] [stderr]     Checking sct v0.7.0
[INFO] [stderr]     Checking webpki-roots v0.23.1
[INFO] [stderr]     Checking ureq v2.7.1
[INFO] [stderr]     Checking crates-io-proxy v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 8.93s
[INFO] running `Command { std: "docker" "inspect" "bc2104482eaa47d273624031a45430be06653b4f671d49c7c2f2b1f3e6f3e598", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bc2104482eaa47d273624031a45430be06653b4f671d49c7c2f2b1f3e6f3e598", kill_on_drop: false }`
[INFO] [stdout] bc2104482eaa47d273624031a45430be06653b4f671d49c7c2f2b1f3e6f3e598
[INFO] checking crates-io-proxy-0.2.0 against try#645bb72776a6a56a1a8f52631a44bd082b2ba509 for absurd-question-mark-desugar
[INFO] extracting crate crates-io-proxy 0.2.0 into /workspace/builds/worker-0-tc2/source
[INFO] validating manifest of crates.io crate crates-io-proxy 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 crates-io-proxy 0.2.0
[INFO] finished tweaking crates.io crate crates-io-proxy 0.2.0
[INFO] tweaked toml for crates.io crate crates-io-proxy 0.2.0 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] crate crates.io crate crates-io-proxy 0.2.0 already has a lockfile, it will not be regenerated
[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-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 238ab590391b2ec6726c1ff8334beb7504e51ccf3650456e2ac3aa9a4000e8db
[INFO] running `Command { std: "docker" "start" "-a" "238ab590391b2ec6726c1ff8334beb7504e51ccf3650456e2ac3aa9a4000e8db", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "238ab590391b2ec6726c1ff8334beb7504e51ccf3650456e2ac3aa9a4000e8db", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "238ab590391b2ec6726c1ff8334beb7504e51ccf3650456e2ac3aa9a4000e8db", kill_on_drop: false }`
[INFO] [stdout] 238ab590391b2ec6726c1ff8334beb7504e51ccf3650456e2ac3aa9a4000e8db
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 410c0ce8ea0d87ed485aa7408e2b470a160cb80d541ca16656d113a933318573
[INFO] running `Command { std: "docker" "start" "-a" "410c0ce8ea0d87ed485aa7408e2b470a160cb80d541ca16656d113a933318573", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.147
[INFO] [stderr]     Checking log v0.4.19
[INFO] [stderr]    Compiling crc32fast v1.3.2
[INFO] [stderr]    Compiling rustls v0.21.6
[INFO] [stderr]     Checking ascii v1.1.0
[INFO] [stderr]     Checking miniz_oxide v0.7.1
[INFO] [stderr]     Checking chunked_transfer v1.4.1
[INFO] [stderr]     Checking pico-args v0.5.0
[INFO] [stderr]     Checking env_logger v0.10.0
[INFO] [stderr]     Checking tiny_http v0.12.0
[INFO] [stderr]     Checking flate2 v1.0.26
[INFO] [stderr]    Compiling cc v1.0.82
[INFO] [stderr]    Compiling ring v0.16.20
[INFO] [stderr]     Checking rustls-webpki v0.100.1
[INFO] [stderr]     Checking rustls-webpki v0.101.3
[INFO] [stderr]     Checking sct v0.7.0
[INFO] [stderr]     Checking webpki-roots v0.23.1
[INFO] [stderr]     Checking ureq v2.7.1
[INFO] [stderr]     Checking crates-io-proxy v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 9.06s
[INFO] running `Command { std: "docker" "inspect" "410c0ce8ea0d87ed485aa7408e2b470a160cb80d541ca16656d113a933318573", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "410c0ce8ea0d87ed485aa7408e2b470a160cb80d541ca16656d113a933318573", kill_on_drop: false }`
[INFO] [stdout] 410c0ce8ea0d87ed485aa7408e2b470a160cb80d541ca16656d113a933318573