[INFO] fetching crate index_list 0.2.11...
[INFO] checking index_list-0.2.11 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate index_list 0.2.11 into /workspace/builds/worker-2-tc1/source
[INFO] validating manifest of crates.io crate index_list 0.2.11 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 index_list 0.2.11
[INFO] finished tweaking crates.io crate index_list 0.2.11
[INFO] tweaked toml for crates.io crate index_list 0.2.11 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate crates.io crate index_list 0.2.11 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]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded clap v4.4.7
[INFO] [stderr]   Downloaded ciborium-io v0.2.1
[INFO] [stderr]   Downloaded ciborium-ll v0.2.1
[INFO] [stderr]   Downloaded ciborium v0.2.1
[INFO] [stderr]   Downloaded clap_builder v4.4.7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 6114e080a8393ba6242b8397e3e3e4fa2bdaff71ddcbe7de63a4451d3686a4dd
[INFO] running `Command { std: "docker" "start" "-a" "6114e080a8393ba6242b8397e3e3e4fa2bdaff71ddcbe7de63a4451d3686a4dd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6114e080a8393ba6242b8397e3e3e4fa2bdaff71ddcbe7de63a4451d3686a4dd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6114e080a8393ba6242b8397e3e3e4fa2bdaff71ddcbe7de63a4451d3686a4dd", kill_on_drop: false }`
[INFO] [stdout] 6114e080a8393ba6242b8397e3e3e4fa2bdaff71ddcbe7de63a4451d3686a4dd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 34e09d37965afb2cfadb16380a5cfc5ec62089657b3b87764e9452463c07a992
[INFO] running `Command { std: "docker" "start" "-a" "34e09d37965afb2cfadb16380a5cfc5ec62089657b3b87764e9452463c07a992", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.69
[INFO] [stderr]    Compiling memoffset v0.9.0
[INFO] [stderr]    Compiling crossbeam-utils v0.8.16
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.15
[INFO] [stderr]    Compiling serde v1.0.190
[INFO] [stderr]    Compiling libc v0.2.150
[INFO] [stderr]    Compiling num-traits v0.2.17
[INFO] [stderr]    Compiling rustix v0.38.21
[INFO] [stderr]    Compiling rayon-core v1.12.0
[INFO] [stderr]     Checking either v1.9.0
[INFO] [stderr]    Compiling serde_json v1.0.108
[INFO] [stderr]     Checking clap_lex v0.6.0
[INFO] [stderr]     Checking anstyle v1.0.4
[INFO] [stderr]     Checking ryu v1.0.15
[INFO] [stderr]     Checking itoa v1.0.9
[INFO] [stderr]     Checking regex-syntax v0.8.2
[INFO] [stderr]     Checking half v1.8.2
[INFO] [stderr]     Checking ciborium-io v0.2.1
[INFO] [stderr]     Checking bitflags v2.4.1
[INFO] [stderr]     Checking plotters-backend v0.3.5
[INFO] [stderr]     Checking linux-raw-sys v0.4.10
[INFO] [stderr]     Checking clap_builder v4.4.7
[INFO] [stderr]     Checking itertools v0.10.5
[INFO] [stderr]     Checking ppv-lite86 v0.2.17
[INFO] [stderr]     Checking cast v0.3.0
[INFO] [stderr]     Checking walkdir v2.4.0
[INFO] [stderr]     Checking oorandom v11.1.3
[INFO] [stderr]     Checking anes v0.1.6
[INFO] [stderr]     Checking ciborium-ll v0.2.1
[INFO] [stderr]     Checking index_list v0.2.11 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking plotters-svg v0.3.5
[INFO] [stdout] warning: the item `DoubleEndedIterator` is imported redundantly
[INFO] [stdout]  --> src/listdrainiter.rs:7:17
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::iter::{DoubleEndedIterator, FusedIterator};
[INFO] [stdout]   |                 ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `DoubleEndedIterator` is already defined here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TryFrom` is imported redundantly
[INFO] [stdout]  --> src/listindex.rs:3:11
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::{convert::TryFrom, default::Default, fmt, num::NonZeroU32};
[INFO] [stdout]   |           ^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `TryFrom` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `DoubleEndedIterator` is imported redundantly
[INFO] [stdout]  --> src/listiter.rs:7:17
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::iter::{DoubleEndedIterator, FusedIterator};
[INFO] [stdout]   |                 ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `DoubleEndedIterator` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Default` is imported redundantly
[INFO] [stdout]   --> src/lib.rs:24:26
[INFO] [stdout]    |
[INFO] [stdout] 24 | use std::{cmp::Ordering, default::Default, fmt};
[INFO] [stdout]    |                          ^^^^^^^^^^^^^^^^
[INFO] [stdout]   --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:144:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `Default` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Extend` is imported redundantly
[INFO] [stdout]   --> src/lib.rs:25:17
[INFO] [stdout]    |
[INFO] [stdout] 25 | use std::iter::{Extend, FromIterator};
[INFO] [stdout]    |                 ^^^^^^
[INFO] [stdout]   --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `Extend` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `FromIterator` is imported redundantly
[INFO] [stdout]   --> src/lib.rs:25:25
[INFO] [stdout]    |
[INFO] [stdout] 25 | use std::iter::{Extend, FromIterator};
[INFO] [stdout]    |                         ^^^^^^^^^^^^
[INFO] [stdout]   --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `FromIterator` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking crossbeam-deque v0.8.3
[INFO] [stderr]     Checking getrandom v0.2.10
[INFO] [stderr]     Checking regex-automata v0.4.3
[INFO] [stderr]    Compiling quote v1.0.33
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking is-terminal v0.4.9
[INFO] [stderr]    Compiling syn v2.0.39
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking rayon v1.8.0
[INFO] [stderr]     Checking criterion-plot v0.5.0
[INFO] [stderr]     Checking plotters v0.3.5
[INFO] [stderr]     Checking clap v4.4.7
[INFO] [stderr]     Checking regex v1.10.2
[INFO] [stderr]    Compiling serde_derive v1.0.190
[INFO] [stderr]     Checking ciborium v0.2.1
[INFO] [stderr]     Checking tinytemplate v1.2.1
[INFO] [stderr]     Checking criterion v0.5.1
[INFO] [stdout] warning: the item `DoubleEndedIterator` is imported redundantly
[INFO] [stdout]  --> src/listdrainiter.rs:7:17
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::iter::{DoubleEndedIterator, FusedIterator};
[INFO] [stdout]   |                 ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `DoubleEndedIterator` is already defined here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TryFrom` is imported redundantly
[INFO] [stdout]  --> src/listindex.rs:3:11
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::{convert::TryFrom, default::Default, fmt, num::NonZeroU32};
[INFO] [stdout]   |           ^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `TryFrom` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `DoubleEndedIterator` is imported redundantly
[INFO] [stdout]  --> src/listiter.rs:7:17
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::iter::{DoubleEndedIterator, FusedIterator};
[INFO] [stdout]   |                 ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `DoubleEndedIterator` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Default` is imported redundantly
[INFO] [stdout]   --> src/lib.rs:24:26
[INFO] [stdout]    |
[INFO] [stdout] 24 | use std::{cmp::Ordering, default::Default, fmt};
[INFO] [stdout]    |                          ^^^^^^^^^^^^^^^^
[INFO] [stdout]   --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:144:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `Default` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Extend` is imported redundantly
[INFO] [stdout]   --> src/lib.rs:25:17
[INFO] [stdout]    |
[INFO] [stdout] 25 | use std::iter::{Extend, FromIterator};
[INFO] [stdout]    |                 ^^^^^^
[INFO] [stdout]   --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `Extend` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `FromIterator` is imported redundantly
[INFO] [stdout]   --> src/lib.rs:25:25
[INFO] [stdout]    |
[INFO] [stdout] 25 | use std::iter::{Extend, FromIterator};
[INFO] [stdout]    |                         ^^^^^^^^^^^^
[INFO] [stdout]   --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `FromIterator` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 15.28s
[INFO] running `Command { std: "docker" "inspect" "34e09d37965afb2cfadb16380a5cfc5ec62089657b3b87764e9452463c07a992", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "34e09d37965afb2cfadb16380a5cfc5ec62089657b3b87764e9452463c07a992", kill_on_drop: false }`
[INFO] [stdout] 34e09d37965afb2cfadb16380a5cfc5ec62089657b3b87764e9452463c07a992