[INFO] fetching crate hybrid-rc 0.6.0...
[INFO] checking hybrid-rc-0.6.0 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate hybrid-rc 0.6.0 into /workspace/builds/worker-7-tc1/source
[INFO] validating manifest of crates.io crate hybrid-rc 0.6.0 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 hybrid-rc 0.6.0
[INFO] finished tweaking crates.io crate hybrid-rc 0.6.0
[INFO] tweaked toml for crates.io crate hybrid-rc 0.6.0 written to /workspace/builds/worker-7-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]      Locking 61 packages
[INFO] [stderr]       Adding bitflags v1.3.2 (latest: v2.5.0)
[INFO] [stderr]       Adding clap v2.34.0 (latest: v4.5.4)
[INFO] [stderr]       Adding criterion v0.3.6 (latest: v0.5.1)
[INFO] [stderr]       Adding criterion-plot v0.4.5 (latest: v0.5.0)
[INFO] [stderr]       Adding half v1.8.3 (latest: v2.4.0)
[INFO] [stderr]       Adding hermit-abi v0.1.19 (latest: v0.3.9)
[INFO] [stderr]       Adding itertools v0.10.5 (latest: v0.12.1)
[INFO] [stderr]       Adding textwrap v0.11.0 (latest: v0.16.1)
[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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 1c166ce1da5bcbdba69151e4bd209f2ee971d253517a4254c83369ef58945616
[INFO] running `Command { std: "docker" "start" "-a" "1c166ce1da5bcbdba69151e4bd209f2ee971d253517a4254c83369ef58945616", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1c166ce1da5bcbdba69151e4bd209f2ee971d253517a4254c83369ef58945616", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1c166ce1da5bcbdba69151e4bd209f2ee971d253517a4254c83369ef58945616", kill_on_drop: false }`
[INFO] [stdout] 1c166ce1da5bcbdba69151e4bd209f2ee971d253517a4254c83369ef58945616
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] d684f61b9b774c2676367707f6f945e6171daa0a0f24427a8da6462ba0f0d218
[INFO] running `Command { std: "docker" "start" "-a" "d684f61b9b774c2676367707f6f945e6171daa0a0f24427a8da6462ba0f0d218", kill_on_drop: false }`
[INFO] [stderr]     Checking memchr v2.7.2
[INFO] [stderr]     Checking regex-syntax v0.8.3
[INFO] [stderr]     Checking unicode-width v0.1.11
[INFO] [stderr]     Checking half v1.8.3
[INFO] [stderr]     Checking serde_json v1.0.115
[INFO] [stderr]     Checking criterion-plot v0.4.5
[INFO] [stderr]     Checking hybrid-rc v0.6.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]    Compiling serde_derive v1.0.197
[INFO] [stdout] warning: the item `ToOwned` is imported redundantly
[INFO] [stdout]    --> src/lib.rs:127:26
[INFO] [stdout]     |
[INFO] [stdout] 127 | use alloc::borrow::{Cow, ToOwned};
[INFO] [stdout]     |                          ^^^^^^^
[INFO] [stdout]    --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]     |
[INFO] [stdout]     = note: the item `ToOwned` is already defined here
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Box` is imported redundantly
[INFO] [stdout]    --> src/lib.rs:128:5
[INFO] [stdout]     |
[INFO] [stdout] 128 | use alloc::boxed::Box;
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]     |
[INFO] [stdout]     = note: the item `Box` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `String` is imported redundantly
[INFO] [stdout]    --> src/lib.rs:129:5
[INFO] [stdout]     |
[INFO] [stdout] 129 | use alloc::string::String;
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]     |
[INFO] [stdout]     = note: the item `String` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Vec` is imported redundantly
[INFO] [stdout]    --> src/lib.rs:130:5
[INFO] [stdout]     |
[INFO] [stdout] 130 | use alloc::vec::Vec;
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^
[INFO] [stdout]    --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]     |
[INFO] [stdout]     = note: the item `Vec` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking clap v2.34.0
[INFO] [stdout] warning: ambiguous wide pointer comparison, the comparison includes metadata which may not be expected
[INFO] [stdout]    --> src/lib.rs:962:3
[INFO] [stdout]     |
[INFO] [stdout] 962 |         this.ptr.as_ptr() == other.ptr.as_ptr()
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(ambiguous_wide_pointer_comparisons)]` on by default
[INFO] [stdout] help: use `std::ptr::addr_eq` or untyped pointers to only compare their addresses
[INFO] [stdout]     |
[INFO] [stdout] 962 |         std::ptr::addr_eq(this.ptr.as_ptr(), other.ptr.as_ptr())
[INFO] [stdout]     |         ++++++++++++++++++                 ~                   +
[INFO] [stdout] help: use explicit `std::ptr::eq` method to compare metadata and addresses
[INFO] [stdout]     |
[INFO] [stdout] 962 |         std::ptr::eq(this.ptr.as_ptr(), other.ptr.as_ptr())
[INFO] [stdout]     |         +++++++++++++                 ~                   +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: ambiguous wide pointer comparison, the comparison includes metadata which may not be expected
[INFO] [stdout]    --> src/lib.rs:971:3
[INFO] [stdout]     |
[INFO] [stdout] 971 |         this.ptr.as_ptr() == other.ptr.as_ptr()
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: use `std::ptr::addr_eq` or untyped pointers to only compare their addresses
[INFO] [stdout]     |
[INFO] [stdout] 971 |         std::ptr::addr_eq(this.ptr.as_ptr(), other.ptr.as_ptr())
[INFO] [stdout]     |         ++++++++++++++++++                 ~                   +
[INFO] [stdout] help: use explicit `std::ptr::eq` method to compare metadata and addresses
[INFO] [stdout]     |
[INFO] [stdout] 971 |         std::ptr::eq(this.ptr.as_ptr(), other.ptr.as_ptr())
[INFO] [stdout]     |         +++++++++++++                 ~                   +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking serde_cbor v0.11.2
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking csv-core v0.1.11
[INFO] [stderr]     Checking csv v1.3.0
[INFO] [stderr]     Checking tinytemplate v1.2.1
[INFO] [stderr]     Checking regex-automata v0.4.6
[INFO] [stderr]     Checking regex v1.10.4
[INFO] [stderr]     Checking criterion v0.3.6
[INFO] [stdout] warning: the item `ToOwned` is imported redundantly
[INFO] [stdout]    --> src/lib.rs:127:26
[INFO] [stdout]     |
[INFO] [stdout] 127 | use alloc::borrow::{Cow, ToOwned};
[INFO] [stdout]     |                          ^^^^^^^
[INFO] [stdout]    --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]     |
[INFO] [stdout]     = note: the item `ToOwned` is already defined here
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Vec` is imported redundantly
[INFO] [stdout]    --> src/lib.rs:130:5
[INFO] [stdout]     |
[INFO] [stdout] 130 | use alloc::vec::Vec;
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^
[INFO] [stdout]    --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]     |
[INFO] [stdout]     = note: the item `Vec` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TryInto` is imported redundantly
[INFO] [stdout]   --> src/thread_id.rs:74:6
[INFO] [stdout]    |
[INFO] [stdout] 72 |     use super::*;
[INFO] [stdout]    |         -------- the item `TryInto` is already imported here
[INFO] [stdout] 73 |     use alloc::format;
[INFO] [stdout] 74 |     use core::convert::TryInto;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `drop` is imported redundantly
[INFO] [stdout]  --> benches/benchmark.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::mem::drop;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `drop` 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: ambiguous wide pointer comparison, the comparison includes metadata which may not be expected
[INFO] [stdout]    --> src/lib.rs:962:3
[INFO] [stdout]     |
[INFO] [stdout] 962 |         this.ptr.as_ptr() == other.ptr.as_ptr()
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(ambiguous_wide_pointer_comparisons)]` on by default
[INFO] [stdout] help: use `std::ptr::addr_eq` or untyped pointers to only compare their addresses
[INFO] [stdout]     |
[INFO] [stdout] 962 |         std::ptr::addr_eq(this.ptr.as_ptr(), other.ptr.as_ptr())
[INFO] [stdout]     |         ++++++++++++++++++                 ~                   +
[INFO] [stdout] help: use explicit `std::ptr::eq` method to compare metadata and addresses
[INFO] [stdout]     |
[INFO] [stdout] 962 |         std::ptr::eq(this.ptr.as_ptr(), other.ptr.as_ptr())
[INFO] [stdout]     |         +++++++++++++                 ~                   +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: ambiguous wide pointer comparison, the comparison includes metadata which may not be expected
[INFO] [stdout]    --> src/lib.rs:971:3
[INFO] [stdout]     |
[INFO] [stdout] 971 |         this.ptr.as_ptr() == other.ptr.as_ptr()
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: use `std::ptr::addr_eq` or untyped pointers to only compare their addresses
[INFO] [stdout]     |
[INFO] [stdout] 971 |         std::ptr::addr_eq(this.ptr.as_ptr(), other.ptr.as_ptr())
[INFO] [stdout]     |         ++++++++++++++++++                 ~                   +
[INFO] [stdout] help: use explicit `std::ptr::eq` method to compare metadata and addresses
[INFO] [stdout]     |
[INFO] [stdout] 971 |         std::ptr::eq(this.ptr.as_ptr(), other.ptr.as_ptr())
[INFO] [stdout]     |         +++++++++++++                 ~                   +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 5.78s
[INFO] running `Command { std: "docker" "inspect" "d684f61b9b774c2676367707f6f945e6171daa0a0f24427a8da6462ba0f0d218", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d684f61b9b774c2676367707f6f945e6171daa0a0f24427a8da6462ba0f0d218", kill_on_drop: false }`
[INFO] [stdout] d684f61b9b774c2676367707f6f945e6171daa0a0f24427a8da6462ba0f0d218