[INFO] fetching crate s3v4 0.3.5...
[INFO] checking s3v4-0.3.5 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate s3v4 0.3.5 into /workspace/builds/worker-6-tc1/source
[INFO] validating manifest of crates.io crate s3v4 0.3.5 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 s3v4 0.3.5
[INFO] finished tweaking crates.io crate s3v4 0.3.5
[INFO] tweaked toml for crates.io crate s3v4 0.3.5 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate crates.io crate s3v4 0.3.5 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]  Downloading crates ...
[INFO] [stderr]   Downloaded cpufeatures v0.2.8
[INFO] [stderr]   Downloaded ureq v2.7.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 2c5da76f50bb112dd6bbac96e32c381180d1b69204e4c4acd933176270a71856
[INFO] running `Command { std: "docker" "start" "-a" "2c5da76f50bb112dd6bbac96e32c381180d1b69204e4c4acd933176270a71856", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2c5da76f50bb112dd6bbac96e32c381180d1b69204e4c4acd933176270a71856", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2c5da76f50bb112dd6bbac96e32c381180d1b69204e4c4acd933176270a71856", kill_on_drop: false }`
[INFO] [stdout] 2c5da76f50bb112dd6bbac96e32c381180d1b69204e4c4acd933176270a71856
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 50debe7bc8e5574a52fb81b441a7cef38ab7e2c0f2f598654571ee6b2758adc8
[INFO] running `Command { std: "docker" "start" "-a" "50debe7bc8e5574a52fb81b441a7cef38ab7e2c0f2f598654571ee6b2758adc8", kill_on_drop: false }`
[INFO] [stderr]    Compiling cc v1.0.79
[INFO] [stderr]    Compiling libc v0.2.146
[INFO] [stderr]    Compiling typenum v1.16.0
[INFO] [stderr]    Compiling generic-array v0.14.7
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]     Checking unicode-bidi v0.3.13
[INFO] [stderr]     Checking unicode-normalization v0.1.22
[INFO] [stderr]    Compiling crc32fast v1.3.2
[INFO] [stderr]     Checking gimli v0.27.3
[INFO] [stderr]     Checking percent-encoding v2.3.0
[INFO] [stderr]     Checking subtle v2.5.0
[INFO] [stderr]     Checking form_urlencoded v1.2.0
[INFO] [stderr]     Checking miniz_oxide v0.6.2
[INFO] [stderr]     Checking idna v0.4.0
[INFO] [stderr]     Checking object v0.30.4
[INFO] [stderr]    Compiling error-chain v0.12.4
[INFO] [stderr]    Compiling rustls v0.21.2
[INFO] [stderr]     Checking url v2.4.0
[INFO] [stderr]     Checking time v0.1.45
[INFO] [stderr]     Checking miniz_oxide v0.7.1
[INFO] [stderr]     Checking cpufeatures v0.2.8
[INFO] [stderr]     Checking iana-time-zone v0.1.57
[INFO] [stderr]     Checking log v0.4.19
[INFO] [stderr]    Compiling ring v0.16.20
[INFO] [stderr]    Compiling backtrace v0.3.67
[INFO] [stderr]     Checking urlencoding v2.1.2
[INFO] [stderr]     Checking base64 v0.21.2
[INFO] [stderr]     Checking hex v0.4.3
[INFO] [stderr]     Checking flate2 v1.0.26
[INFO] [stderr]     Checking block-buffer v0.10.4
[INFO] [stderr]     Checking crypto-common v0.1.6
[INFO] [stderr]     Checking chrono v0.4.26
[INFO] [stderr]     Checking digest v0.10.7
[INFO] [stderr]     Checking sha2 v0.10.7
[INFO] [stderr]     Checking hmac v0.12.1
[INFO] [stderr]     Checking addr2line v0.19.0
[INFO] [stderr]     Checking s3v4 v0.3.5 (/opt/rustwide/workdir)
[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 v2.7.0
[INFO] [stdout] warning: the item `url` is imported redundantly
[INFO] [stdout]   --> examples/presign.rs:34:5
[INFO] [stdout]    |
[INFO] [stdout] 34 | use url;
[INFO] [stdout]    |     ^^^ the item `url` 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 `url` is imported redundantly
[INFO] [stdout]   --> examples/download_example.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | use url;
[INFO] [stdout]    |     ^^^ the item `url` 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 `DateTime` is imported redundantly
[INFO] [stdout]    --> src/lib.rs:441:18
[INFO] [stdout]     |
[INFO] [stdout] 440 |     use super::*;
[INFO] [stdout]     |         -------- the item `DateTime` is already imported here
[INFO] [stdout] 441 |     use chrono::{DateTime, TimeZone, Utc};
[INFO] [stdout]     |                  ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `url` is imported redundantly
[INFO] [stdout]   --> examples/head_example.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | use url;
[INFO] [stdout]    |     ^^^ the item `url` 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 `Utc` is imported redundantly
[INFO] [stdout]    --> src/lib.rs:441:38
[INFO] [stdout]     |
[INFO] [stdout] 440 |     use super::*;
[INFO] [stdout]     |         -------- the item `Utc` is already imported here
[INFO] [stdout] 441 |     use chrono::{DateTime, TimeZone, Utc};
[INFO] [stdout]     |                                      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `url` is imported redundantly
[INFO] [stdout]   --> examples/upload_example.rs:21:5
[INFO] [stdout]    |
[INFO] [stdout] 21 | use url;
[INFO] [stdout]    |     ^^^ the item `url` 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] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 19.23s
[INFO] running `Command { std: "docker" "inspect" "50debe7bc8e5574a52fb81b441a7cef38ab7e2c0f2f598654571ee6b2758adc8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "50debe7bc8e5574a52fb81b441a7cef38ab7e2c0f2f598654571ee6b2758adc8", kill_on_drop: false }`
[INFO] [stdout] 50debe7bc8e5574a52fb81b441a7cef38ab7e2c0f2f598654571ee6b2758adc8