[INFO] fetching crate prattle 0.1.3...
[INFO] checking prattle-0.1.3 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate prattle 0.1.3 into /workspace/builds/worker-6-tc1/source
[INFO] validating manifest of crates.io crate prattle 0.1.3 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 prattle 0.1.3
[INFO] finished tweaking crates.io crate prattle 0.1.3
[INFO] tweaked toml for crates.io crate prattle 0.1.3 written to /workspace/builds/worker-6-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]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 20 packages
[INFO] [stderr]       Adding object v0.32.2 (latest: v0.34.0)
[INFO] [stderr]       Adding syn v1.0.109 (latest: v2.0.58)
[INFO] [stderr]       Adding synstructure v0.12.6 (latest: v0.13.1)
[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]     Blocking waiting for file lock on package cache
[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] 6dfd01fe768be82f953ef9bb099321981e6758e3ace1c4981b3e1a0b334ade9e
[INFO] running `Command { std: "docker" "start" "-a" "6dfd01fe768be82f953ef9bb099321981e6758e3ace1c4981b3e1a0b334ade9e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6dfd01fe768be82f953ef9bb099321981e6758e3ace1c4981b3e1a0b334ade9e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6dfd01fe768be82f953ef9bb099321981e6758e3ace1c4981b3e1a0b334ade9e", kill_on_drop: false }`
[INFO] [stdout] 6dfd01fe768be82f953ef9bb099321981e6758e3ace1c4981b3e1a0b334ade9e
[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] 086c83e30a57b6db52272c0d133238259003b29e0947de95c8662938ffb5ba92
[INFO] running `Command { std: "docker" "start" "-a" "086c83e30a57b6db52272c0d133238259003b29e0947de95c8662938ffb5ba92", kill_on_drop: false }`
[INFO] [stderr]     Checking prattle v0.1.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `Send` is imported redundantly
[INFO] [stdout]   --> src/errors.rs:31:19
[INFO] [stdout]    |
[INFO] [stdout] 31 | use std::marker::{Send, Sync};
[INFO] [stdout]    |                   ^^^^
[INFO] [stdout]   --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:124:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `Send` is already defined here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Sync` is imported redundantly
[INFO] [stdout]   --> src/errors.rs:31:25
[INFO] [stdout]    |
[INFO] [stdout] 31 | use std::marker::{Send, Sync};
[INFO] [stdout]    |                         ^^^^
[INFO] [stdout]   --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:124:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `Sync` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Send` is imported redundantly
[INFO] [stdout]   --> src/parser.rs:39:19
[INFO] [stdout]    |
[INFO] [stdout] 39 | use std::marker::{Send, Sync};
[INFO] [stdout]    |                   ^^^^
[INFO] [stdout]   --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:124:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `Send` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Sync` is imported redundantly
[INFO] [stdout]   --> src/parser.rs:39:25
[INFO] [stdout]    |
[INFO] [stdout] 39 | use std::marker::{Send, Sync};
[INFO] [stdout]    |                         ^^^^
[INFO] [stdout]   --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:124:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `Sync` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Send` is imported redundantly
[INFO] [stdout]   --> src/spec.rs:46:19
[INFO] [stdout]    |
[INFO] [stdout] 46 | use std::marker::{Send, Sync};
[INFO] [stdout]    |                   ^^^^
[INFO] [stdout]   --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:124:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `Send` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Sync` is imported redundantly
[INFO] [stdout]   --> src/spec.rs:46:25
[INFO] [stdout]    |
[INFO] [stdout] 46 | use std::marker::{Send, Sync};
[INFO] [stdout]    |                         ^^^^
[INFO] [stdout]   --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:124:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `Sync` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `LexerVec` is imported redundantly
[INFO] [stdout]    --> src/parser.rs:172:9
[INFO] [stdout]     |
[INFO] [stdout] 171 |     use super::*;
[INFO] [stdout]     |         -------- the item `LexerVec` is already imported here
[INFO] [stdout] 172 |     use lexer::LexerVec;
[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] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.57s
[INFO] running `Command { std: "docker" "inspect" "086c83e30a57b6db52272c0d133238259003b29e0947de95c8662938ffb5ba92", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "086c83e30a57b6db52272c0d133238259003b29e0947de95c8662938ffb5ba92", kill_on_drop: false }`
[INFO] [stdout] 086c83e30a57b6db52272c0d133238259003b29e0947de95c8662938ffb5ba92
[INFO] checking prattle-0.1.3 against try#645bb72776a6a56a1a8f52631a44bd082b2ba509 for absurd-question-mark-desugar
[INFO] extracting crate prattle 0.1.3 into /workspace/builds/worker-6-tc2/source
[INFO] validating manifest of crates.io crate prattle 0.1.3 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 prattle 0.1.3
[INFO] finished tweaking crates.io crate prattle 0.1.3
[INFO] tweaked toml for crates.io crate prattle 0.1.3 written to /workspace/builds/worker-6-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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 00fdd9d7b9ae524aae4aee3f44f85ed2700b95a067bee90d5ced3e3fecb4027c
[INFO] running `Command { std: "docker" "start" "-a" "00fdd9d7b9ae524aae4aee3f44f85ed2700b95a067bee90d5ced3e3fecb4027c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "00fdd9d7b9ae524aae4aee3f44f85ed2700b95a067bee90d5ced3e3fecb4027c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "00fdd9d7b9ae524aae4aee3f44f85ed2700b95a067bee90d5ced3e3fecb4027c", kill_on_drop: false }`
[INFO] [stdout] 00fdd9d7b9ae524aae4aee3f44f85ed2700b95a067bee90d5ced3e3fecb4027c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 2dcccbd2ef0a5baa98d2ea4e4cb5b1f60eb0a886abc7874c08935a8586109d4d
[INFO] running `Command { std: "docker" "start" "-a" "2dcccbd2ef0a5baa98d2ea4e4cb5b1f60eb0a886abc7874c08935a8586109d4d", kill_on_drop: false }`
[INFO] [stderr]     Checking prattle v0.1.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `Send` is imported redundantly
[INFO] [stdout]   --> src/errors.rs:31:19
[INFO] [stdout]    |
[INFO] [stdout] 31 | use std::marker::{Send, Sync};
[INFO] [stdout]    |                   ^^^^
[INFO] [stdout]   --> /rustc/645bb72776a6a56a1a8f52631a44bd082b2ba509/library/std/src/prelude/mod.rs:124:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `Send` is already defined here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Sync` is imported redundantly
[INFO] [stdout]   --> src/errors.rs:31:25
[INFO] [stdout]    |
[INFO] [stdout] 31 | use std::marker::{Send, Sync};
[INFO] [stdout]    |                         ^^^^
[INFO] [stdout]   --> /rustc/645bb72776a6a56a1a8f52631a44bd082b2ba509/library/std/src/prelude/mod.rs:124:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `Sync` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Send` is imported redundantly
[INFO] [stdout]   --> src/parser.rs:39:19
[INFO] [stdout]    |
[INFO] [stdout] 39 | use std::marker::{Send, Sync};
[INFO] [stdout]    |                   ^^^^
[INFO] [stdout]   --> /rustc/645bb72776a6a56a1a8f52631a44bd082b2ba509/library/std/src/prelude/mod.rs:124:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `Send` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Sync` is imported redundantly
[INFO] [stdout]   --> src/parser.rs:39:25
[INFO] [stdout]    |
[INFO] [stdout] 39 | use std::marker::{Send, Sync};
[INFO] [stdout]    |                         ^^^^
[INFO] [stdout]   --> /rustc/645bb72776a6a56a1a8f52631a44bd082b2ba509/library/std/src/prelude/mod.rs:124:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `Sync` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Send` is imported redundantly
[INFO] [stdout]   --> src/spec.rs:46:19
[INFO] [stdout]    |
[INFO] [stdout] 46 | use std::marker::{Send, Sync};
[INFO] [stdout]    |                   ^^^^
[INFO] [stdout]   --> /rustc/645bb72776a6a56a1a8f52631a44bd082b2ba509/library/std/src/prelude/mod.rs:124:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `Send` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Sync` is imported redundantly
[INFO] [stdout]   --> src/spec.rs:46:25
[INFO] [stdout]    |
[INFO] [stdout] 46 | use std::marker::{Send, Sync};
[INFO] [stdout]    |                         ^^^^
[INFO] [stdout]   --> /rustc/645bb72776a6a56a1a8f52631a44bd082b2ba509/library/std/src/prelude/mod.rs:124:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `Sync` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `LexerVec` is imported redundantly
[INFO] [stdout]    --> src/parser.rs:172:9
[INFO] [stdout]     |
[INFO] [stdout] 171 |     use super::*;
[INFO] [stdout]     |         -------- the item `LexerVec` is already imported here
[INFO] [stdout] 172 |     use lexer::LexerVec;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings 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 0.42s
[INFO] running `Command { std: "docker" "inspect" "2dcccbd2ef0a5baa98d2ea4e4cb5b1f60eb0a886abc7874c08935a8586109d4d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2dcccbd2ef0a5baa98d2ea4e4cb5b1f60eb0a886abc7874c08935a8586109d4d", kill_on_drop: false }`
[INFO] [stdout] 2dcccbd2ef0a5baa98d2ea4e4cb5b1f60eb0a886abc7874c08935a8586109d4d