[INFO] fetching crate ra_ap_stdx 0.0.187...
[INFO] checking ra_ap_stdx-0.0.187 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate ra_ap_stdx 0.0.187 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate ra_ap_stdx 0.0.187 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 ra_ap_stdx 0.0.187
[INFO] finished tweaking crates.io crate ra_ap_stdx 0.0.187
[INFO] tweaked toml for crates.io crate ra_ap_stdx 0.0.187 written to /workspace/builds/worker-4-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]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 29 packages
[INFO] [stderr]       Adding always-assert v0.1.3 (latest: v0.2.0)
[INFO] [stderr]       Adding miow v0.5.0 (latest: v0.6.0)
[INFO] [stderr]       Adding object v0.32.2 (latest: v0.34.0)
[INFO] [stderr]       Adding windows-sys v0.42.0 (latest: v0.52.0)
[INFO] [stderr]       Adding windows_aarch64_gnullvm v0.42.2 (latest: v0.52.4)
[INFO] [stderr]       Adding windows_aarch64_msvc v0.42.2 (latest: v0.52.4)
[INFO] [stderr]       Adding windows_i686_gnu v0.42.2 (latest: v0.52.4)
[INFO] [stderr]       Adding windows_i686_msvc v0.42.2 (latest: v0.52.4)
[INFO] [stderr]       Adding windows_x86_64_gnu v0.42.2 (latest: v0.52.4)
[INFO] [stderr]       Adding windows_x86_64_gnullvm v0.42.2 (latest: v0.52.4)
[INFO] [stderr]       Adding windows_x86_64_msvc v0.42.2 (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]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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] 4924aa6afdbc2de5fcfa661a58bb0b4d4b9f8a51ff2cbf31def932305052c0aa
[INFO] running `Command { std: "docker" "start" "-a" "4924aa6afdbc2de5fcfa661a58bb0b4d4b9f8a51ff2cbf31def932305052c0aa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4924aa6afdbc2de5fcfa661a58bb0b4d4b9f8a51ff2cbf31def932305052c0aa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4924aa6afdbc2de5fcfa661a58bb0b4d4b9f8a51ff2cbf31def932305052c0aa", kill_on_drop: false }`
[INFO] [stdout] 4924aa6afdbc2de5fcfa661a58bb0b4d4b9f8a51ff2cbf31def932305052c0aa
[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] e825c3a04dfa9af7c3be947d0ab0e2fad40c672425925ef8eef2a9917fdfa295
[INFO] running `Command { std: "docker" "start" "-a" "e825c3a04dfa9af7c3be947d0ab0e2fad40c672425925ef8eef2a9917fdfa295", kill_on_drop: false }`
[INFO] [stderr]    Compiling crossbeam-utils v0.8.19
[INFO] [stderr]     Checking jod-thread v0.1.2
[INFO] [stderr]     Checking always-assert v0.1.3
[INFO] [stderr]     Checking crossbeam-channel v0.5.12
[INFO] [stderr]     Checking ra_ap_stdx v0.0.187 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `TryInto` is imported redundantly
[INFO] [stdout]   --> src/anymap.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 20 | use core::convert::TryInto;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `TryInto` is already defined here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TryInto` is imported redundantly
[INFO] [stdout]   --> src/anymap.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 20 | use core::convert::TryInto;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `TryInto` is already defined here
[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: struct `A` is never constructed
[INFO] [stdout]    --> src/anymap.rs:197:12
[INFO] [stdout]     |
[INFO] [stdout] 197 |     struct A(i32);
[INFO] [stdout]     |            ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `B` is never constructed
[INFO] [stdout]    --> src/anymap.rs:199:12
[INFO] [stdout]     |
[INFO] [stdout] 199 |     struct B(i32);
[INFO] [stdout]     |            ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `C` is never constructed
[INFO] [stdout]    --> src/anymap.rs:201:12
[INFO] [stdout]     |
[INFO] [stdout] 201 |     struct C(i32);
[INFO] [stdout]     |            ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `D` is never constructed
[INFO] [stdout]    --> src/anymap.rs:203:12
[INFO] [stdout]     |
[INFO] [stdout] 203 |     struct D(i32);
[INFO] [stdout]     |            ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `E` is never constructed
[INFO] [stdout]    --> src/anymap.rs:205:12
[INFO] [stdout]     |
[INFO] [stdout] 205 |     struct E(i32);
[INFO] [stdout]     |            ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `F` is never constructed
[INFO] [stdout]    --> src/anymap.rs:207:12
[INFO] [stdout]     |
[INFO] [stdout] 207 |     struct F(i32);
[INFO] [stdout]     |            ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `J` is never constructed
[INFO] [stdout]    --> src/anymap.rs:209:12
[INFO] [stdout]     |
[INFO] [stdout] 209 |     struct J(i32);
[INFO] [stdout]     |            ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.79s
[INFO] running `Command { std: "docker" "inspect" "e825c3a04dfa9af7c3be947d0ab0e2fad40c672425925ef8eef2a9917fdfa295", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e825c3a04dfa9af7c3be947d0ab0e2fad40c672425925ef8eef2a9917fdfa295", kill_on_drop: false }`
[INFO] [stdout] e825c3a04dfa9af7c3be947d0ab0e2fad40c672425925ef8eef2a9917fdfa295