[INFO] fetching crate xron 0.3.3...
[INFO] checking xron-0.3.3 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate xron 0.3.3 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate xron 0.3.3 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 xron 0.3.3
[INFO] finished tweaking crates.io crate xron 0.3.3
[INFO] tweaked toml for crates.io crate xron 0.3.3 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate crates.io crate xron 0.3.3 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 failure_derive v0.1.6
[INFO] [stderr]   Downloaded err-derive v0.1.6
[INFO] [stderr]   Downloaded indexmap v1.3.0
[INFO] [stderr]   Downloaded podio v0.1.6
[INFO] [stderr]   Downloaded miniz_oxide v0.3.5
[INFO] [stderr]   Downloaded zip v0.5.3
[INFO] [stderr]   Downloaded bzip2 v0.3.3
[INFO] [stderr]   Downloaded zip v0.4.2
[INFO] [stderr]   Downloaded cc v1.0.48
[INFO] [stderr]   Downloaded quick-xml v0.16.1
[INFO] [stderr]   Downloaded basic_xlsx_writer v0.1.2
[INFO] [stderr]   Downloaded bzip2-sys v0.1.7
[INFO] [stderr]   Downloaded backtrace v0.3.40
[INFO] [stderr]   Downloaded msdos_time v0.1.6
[INFO] [stderr]   Downloaded encoding_rs v0.8.21
[INFO] [stderr]   Downloaded calamine v0.15.6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 1e0e6d9c0e4210c629c25ab79352c6c49e96e004d6a3de76009368c83390c87d
[INFO] running `Command { std: "docker" "start" "-a" "1e0e6d9c0e4210c629c25ab79352c6c49e96e004d6a3de76009368c83390c87d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1e0e6d9c0e4210c629c25ab79352c6c49e96e004d6a3de76009368c83390c87d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1e0e6d9c0e4210c629c25ab79352c6c49e96e004d6a3de76009368c83390c87d", kill_on_drop: false }`
[INFO] [stdout] 1e0e6d9c0e4210c629c25ab79352c6c49e96e004d6a3de76009368c83390c87d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 2e5a422f3bf4584679956eda1729bd016a55a8e6e8ad861a4b1f20fca29bab7c
[INFO] running `Command { std: "docker" "start" "-a" "2e5a422f3bf4584679956eda1729bd016a55a8e6e8ad861a4b1f20fca29bab7c", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.66
[INFO] [stderr]    Compiling proc-macro2 v1.0.6
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling syn v1.0.11
[INFO] [stderr]    Compiling cc v1.0.48
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]    Compiling crc32fast v1.2.0
[INFO] [stderr]     Checking adler32 v1.0.4
[INFO] [stderr]    Compiling byteorder v1.3.2
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling failure_derive v0.1.6
[INFO] [stderr]    Compiling encoding_rs v0.8.21
[INFO] [stderr]    Compiling serde v1.0.104
[INFO] [stderr]     Checking podio v0.1.6
[INFO] [stderr]    Compiling memchr v2.2.1
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]     Checking miniz_oxide v0.3.5
[INFO] [stderr]     Checking rustc-demangle v0.1.16
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling autocfg v0.1.7
[INFO] [stderr]     Checking unicode-width v0.1.7
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]     Checking vec_map v0.8.1
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]    Compiling indexmap v1.3.0
[INFO] [stderr]    Compiling err-derive v0.1.6
[INFO] [stderr]     Checking base64 v0.10.1
[INFO] [stderr]    Compiling backtrace-sys v0.1.32
[INFO] [stderr]    Compiling bzip2-sys v0.1.7
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]     Checking flate2 v1.0.13
[INFO] [stderr]     Checking time v0.1.42
[INFO] [stderr]     Checking atty v0.2.13
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]     Checking msdos_time v0.1.6
[INFO] [stderr]     Checking zip v0.5.3
[INFO] [stderr]     Checking codepage v0.1.1
[INFO] [stderr]     Checking bzip2 v0.3.3
[INFO] [stderr]     Checking zip v0.4.2
[INFO] [stderr]     Checking backtrace v0.3.40
[INFO] [stderr]     Checking basic_xlsx_writer v0.1.2
[INFO] [stderr]    Compiling synstructure v0.12.3
[INFO] [stderr]    Compiling proc-macro-error v0.2.6
[INFO] [stderr]    Compiling serde_derive v1.0.104
[INFO] [stderr]     Checking failure v0.1.6
[INFO] [stderr]     Checking quick-xml v0.16.1
[INFO] [stderr]     Checking calamine v0.15.6
[INFO] [stderr]     Checking ron v0.4.2
[INFO] [stderr]     Checking xron v0.3.3 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 19.28s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: quick-xml v0.16.1
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 1`
[INFO] running `Command { std: "docker" "inspect" "2e5a422f3bf4584679956eda1729bd016a55a8e6e8ad861a4b1f20fca29bab7c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2e5a422f3bf4584679956eda1729bd016a55a8e6e8ad861a4b1f20fca29bab7c", kill_on_drop: false }`
[INFO] [stdout] 2e5a422f3bf4584679956eda1729bd016a55a8e6e8ad861a4b1f20fca29bab7c