[INFO] fetching crate heapless 0.8.0...
[INFO] checking heapless-0.8.0 against master#020bbe46bdf613c0b8211984eaa8e5fe97d6c92d for pr-122960
[INFO] extracting crate heapless 0.8.0 into /workspace/builds/worker-6-tc1/source
[INFO] validating manifest of crates.io crate heapless 0.8.0 on toolchain 020bbe46bdf613c0b8211984eaa8e5fe97d6c92d
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+020bbe46bdf613c0b8211984eaa8e5fe97d6c92d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate heapless 0.8.0
[INFO] finished tweaking crates.io crate heapless 0.8.0
[INFO] tweaked toml for crates.io crate heapless 0.8.0 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" "+020bbe46bdf613c0b8211984eaa8e5fe97d6c92d" "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" "+020bbe46bdf613c0b8211984eaa8e5fe97d6c92d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded stable_deref_trait v1.2.0
[INFO] [stderr]   Downloaded ufmt-write v0.1.0
[INFO] [stderr]   Downloaded defmt v0.3.6
[INFO] [stderr]   Downloaded ufmt-macros v0.3.0
[INFO] [stderr]   Downloaded ufmt v0.2.0
[INFO] [stderr]   Downloaded defmt-parser v0.3.4
[INFO] [stderr]   Downloaded proc-macro-error v1.0.4
[INFO] [stderr]   Downloaded portable-atomic v1.6.0
[INFO] [stderr]   Downloaded critical-section v1.1.2
[INFO] [stderr]   Downloaded proc-macro-error-attr v1.0.4
[INFO] [stderr]   Downloaded defmt-macros v0.3.7
[INFO] [stderr]   Downloaded hash32 v0.3.1
[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" "+020bbe46bdf613c0b8211984eaa8e5fe97d6c92d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 551a9669b19d6cf368e74e5b871db7b2cf0cefc1257608d3396877ae01b1f7f5
[INFO] running `Command { std: "docker" "start" "-a" "551a9669b19d6cf368e74e5b871db7b2cf0cefc1257608d3396877ae01b1f7f5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "551a9669b19d6cf368e74e5b871db7b2cf0cefc1257608d3396877ae01b1f7f5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "551a9669b19d6cf368e74e5b871db7b2cf0cefc1257608d3396877ae01b1f7f5", kill_on_drop: false }`
[INFO] [stdout] 551a9669b19d6cf368e74e5b871db7b2cf0cefc1257608d3396877ae01b1f7f5
[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" "+020bbe46bdf613c0b8211984eaa8e5fe97d6c92d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 587623fc38c84df3cc990cc8f7d3521821bf4996b287263c20d6fb30f13f65de
[INFO] running `Command { std: "docker" "start" "-a" "587623fc38c84df3cc990cc8f7d3521821bf4996b287263c20d6fb30f13f65de", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.79
[INFO] [stderr]    Compiling unicode-ident v1.0.12
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling heapless v0.8.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking byteorder v1.5.0
[INFO] [stderr]     Checking stable_deref_trait v1.2.0
[INFO] [stderr]     Checking ufmt-write v0.1.0
[INFO] [stderr]     Checking hash32 v0.3.1
[INFO] [stdout] error: the item `FromIterator` is imported redundantly
[INFO] [stdout]   --> src/indexmap.rs:5:5
[INFO] [stdout]    |
[INFO] [stdout] 5  |     iter::FromIterator,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   --> /rustc/020bbe46bdf613c0b8211984eaa8e5fe97d6c92d/library/core/src/prelude/mod.rs:42:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `FromIterator` is already defined here
[INFO] [stdout]    |
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]   --> src/lib.rs:85:9
[INFO] [stdout]    |
[INFO] [stdout] 85 | #![deny(warnings)]
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout]    = note: `#[deny(unused_imports)]` implied by `#[deny(warnings)]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: the item `FromIterator` is imported redundantly
[INFO] [stdout]  --> src/indexset.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 |     iter::FromIterator,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/020bbe46bdf613c0b8211984eaa8e5fe97d6c92d/library/core/src/prelude/mod.rs:42:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `FromIterator` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: the item `FromIterator` is imported redundantly
[INFO] [stdout]  --> src/linear_map.rs:2:33
[INFO] [stdout]   |
[INFO] [stdout] 2 | use core::{borrow::Borrow, fmt, iter::FromIterator, mem, ops, slice};
[INFO] [stdout]   |                                 ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/020bbe46bdf613c0b8211984eaa8e5fe97d6c92d/library/core/src/prelude/mod.rs:42:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `FromIterator` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: the item `FromIterator` is imported redundantly
[INFO] [stdout]  --> src/vec.rs:1:38
[INFO] [stdout]   |
[INFO] [stdout] 1 | use core::{cmp::Ordering, fmt, hash, iter::FromIterator, mem::MaybeUninit, ops, ptr, slice};
[INFO] [stdout]   |                                      ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/020bbe46bdf613c0b8211984eaa8e5fe97d6c92d/library/core/src/prelude/mod.rs:42:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `FromIterator` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling quote v1.0.35
[INFO] [stdout] error: aborting due to 4 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `heapless` (lib) due to 5 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "587623fc38c84df3cc990cc8f7d3521821bf4996b287263c20d6fb30f13f65de", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "587623fc38c84df3cc990cc8f7d3521821bf4996b287263c20d6fb30f13f65de", kill_on_drop: false }`
[INFO] [stdout] 587623fc38c84df3cc990cc8f7d3521821bf4996b287263c20d6fb30f13f65de