[INFO] fetching crate foca 0.16.0...
[INFO] checking foca-0.16.0 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate foca 0.16.0 into /workspace/builds/worker-3-tc1/source
[INFO] validating manifest of crates.io crate foca 0.16.0 on toolchain ceab6128fa48a616bfd3e3adf4bc80133b8ee223
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate foca 0.16.0
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate foca 0.16.0
[INFO] tweaked toml for crates.io crate foca 0.16.0 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate crates.io crate foca 0.16.0 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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded proc-macro2 v1.0.64
[INFO] [stderr]   Downloaded serde_derive v1.0.170
[INFO] [stderr]   Downloaded postcard v1.0.4
[INFO] [stderr]   Downloaded serde v1.0.170
[INFO] [stderr]   Downloaded syn v2.0.25
[INFO] [stderr]   Downloaded regex-automata v0.3.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4f45f904a543eaf4ed94ceb31f7ff5b219a49cef2e43ab255a51d14c418b1cce
[INFO] running `Command { std: "docker" "start" "-a" "4f45f904a543eaf4ed94ceb31f7ff5b219a49cef2e43ab255a51d14c418b1cce", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4f45f904a543eaf4ed94ceb31f7ff5b219a49cef2e43ab255a51d14c418b1cce", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4f45f904a543eaf4ed94ceb31f7ff5b219a49cef2e43ab255a51d14c418b1cce", kill_on_drop: false }`
[INFO] [stdout] 4f45f904a543eaf4ed94ceb31f7ff5b219a49cef2e43ab255a51d14c418b1cce
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1200eeba17fa3edc642e488f52086c75f2d480e0ebe4af7767a1689556c8f4a1
[INFO] running `Command { std: "docker" "start" "-a" "1200eeba17fa3edc642e488f52086c75f2d480e0ebe4af7767a1689556c8f4a1", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.147
[INFO] [stderr]    Compiling proc-macro2 v1.0.64
[INFO] [stderr]    Compiling quote v1.0.29
[INFO] [stderr]    Compiling unicode-ident v1.0.10
[INFO] [stderr]     Checking once_cell v1.18.0
[INFO] [stderr]     Checking regex-syntax v0.6.29
[INFO] [stderr]     Checking regex-syntax v0.7.3
[INFO] [stderr]    Compiling serde v1.0.170
[INFO] [stderr]     Checking pin-project-lite v0.2.10
[INFO] [stderr]     Checking tracing-core v0.1.31
[INFO] [stderr]    Compiling anyhow v1.0.71
[INFO] [stderr]    Compiling tokio v1.29.1
[INFO] [stderr]     Checking log v0.4.19
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking tracing-log v0.1.3
[INFO] [stderr]     Checking tracing v0.1.37
[INFO] [stderr]     Checking sharded-slab v0.1.4
[INFO] [stderr]     Checking thread_local v1.1.7
[INFO] [stderr]     Checking smallvec v1.11.0
[INFO] [stderr]     Checking bytes v1.4.0
[INFO] [stderr]    Compiling syn v2.0.25
[INFO] [stderr]     Checking clap v2.34.0
[INFO] [stderr]     Checking getrandom v0.2.10
[INFO] [stderr]     Checking socket2 v0.4.9
[INFO] [stderr]     Checking regex-automata v0.3.2
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking mio v0.8.8
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking regex-automata v0.1.10
[INFO] [stderr]     Checking foca v0.16.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `TryFrom` is imported redundantly
[INFO] [stdout]   --> src/lib.rs:54:27
[INFO] [stdout]    |
[INFO] [stdout] 54 | use core::{cmp::Ordering, convert::TryFrom, fmt, iter::ExactSizeIterator, mem};
[INFO] [stdout]    |                           ^^^^^^^^^^^^^^^^
[INFO] [stdout]   --> /rustc/ceab6128fa48a616bfd3e3adf4bc80133b8ee223/library/core/src/prelude/mod.rs:65:30
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `TryFrom` is already defined here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `ExactSizeIterator` is imported redundantly
[INFO] [stdout]   --> src/lib.rs:54:50
[INFO] [stdout]    |
[INFO] [stdout] 54 | use core::{cmp::Ordering, convert::TryFrom, fmt, iter::ExactSizeIterator, mem};
[INFO] [stdout]    |                                                  ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   --> /rustc/ceab6128fa48a616bfd3e3adf4bc80133b8ee223/library/core/src/prelude/mod.rs:57:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `ExactSizeIterator` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking regex v1.9.1
[INFO] [stderr]     Checking matchers v0.1.0
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking tracing-subscriber v0.3.17
[INFO] [stderr]    Compiling serde_derive v1.0.170
[INFO] [stderr]    Compiling tokio-macros v2.1.0
[INFO] [stderr]     Checking uuid v0.8.2
[INFO] [stdout] warning: the item `TryFrom` is imported redundantly
[INFO] [stdout]   --> src/lib.rs:54:27
[INFO] [stdout]    |
[INFO] [stdout] 54 | use core::{cmp::Ordering, convert::TryFrom, fmt, iter::ExactSizeIterator, mem};
[INFO] [stdout]    |                           ^^^^^^^^^^^^^^^^
[INFO] [stdout]   --> /rustc/ceab6128fa48a616bfd3e3adf4bc80133b8ee223/library/core/src/prelude/mod.rs:65:30
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `TryFrom` is already defined here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `ExactSizeIterator` is imported redundantly
[INFO] [stdout]   --> src/lib.rs:54:50
[INFO] [stdout]    |
[INFO] [stdout] 54 | use core::{cmp::Ordering, convert::TryFrom, fmt, iter::ExactSizeIterator, mem};
[INFO] [stdout]    |                                                  ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   --> /rustc/ceab6128fa48a616bfd3e3adf4bc80133b8ee223/library/core/src/prelude/mod.rs:57:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `ExactSizeIterator` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Buf` is imported redundantly
[INFO] [stdout]     --> src/lib.rs:1586:17
[INFO] [stdout]      |
[INFO] [stdout] 1579 |     use super::*;
[INFO] [stdout]      |         -------- the item `Buf` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 1586 |     use bytes::{Buf, BufMut};
[INFO] [stdout]      |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `BufMut` is imported redundantly
[INFO] [stdout]     --> src/lib.rs:1586:22
[INFO] [stdout]      |
[INFO] [stdout] 1579 |     use super::*;
[INFO] [stdout]      |         -------- the item `BufMut` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 1586 |     use bytes::{Buf, BufMut};
[INFO] [stdout]      |                      ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `TrivialID` is never constructed
[INFO] [stdout]    --> src/testing.rs:424:19
[INFO] [stdout]     |
[INFO] [stdout] 424 | pub(crate) struct TrivialID(u64);
[INFO] [stdout]     |                   ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 7.05s
[INFO] running `Command { std: "docker" "inspect" "1200eeba17fa3edc642e488f52086c75f2d480e0ebe4af7767a1689556c8f4a1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1200eeba17fa3edc642e488f52086c75f2d480e0ebe4af7767a1689556c8f4a1", kill_on_drop: false }`
[INFO] [stdout] 1200eeba17fa3edc642e488f52086c75f2d480e0ebe4af7767a1689556c8f4a1