[INFO] fetching crate im 15.1.0... [INFO] checking im-15.1.0 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback [INFO] extracting crate im 15.1.0 into /workspace/builds/worker-7-tc1/source [INFO] validating manifest of crates.io crate im 15.1.0 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 im 15.1.0 [INFO] finished tweaking crates.io crate im 15.1.0 [INFO] tweaked toml for crates.io crate im 15.1.0 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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "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 76 packages [INFO] [stderr] Adding bitmaps v2.1.0 (latest: v3.2.1) [INFO] [stderr] Adding env_logger v0.8.4 (latest: v0.11.3) [INFO] [stderr] Adding linux-raw-sys v0.4.13 (latest: v0.6.4) [INFO] [stderr] Adding proc-macro2 v0.4.30 (latest: v1.0.79) [INFO] [stderr] Adding proptest-derive v0.3.0 (latest: v0.4.0) [INFO] [stderr] Adding quick-error v1.2.3 (latest: v2.0.1) [INFO] [stderr] Adding quote v0.6.13 (latest: v1.0.35) [INFO] [stderr] Adding sized-chunks v0.6.5 (latest: v0.7.0) [INFO] [stderr] Adding syn v0.15.44 (latest: v2.0.58) [INFO] [stderr] Adding unicode-xid v0.1.0 (latest: v0.2.4) [INFO] [stderr] Adding wasi v0.11.0+wasi-snapshot-preview1 (latest: v0.13.0+wasi-0.2.0) [INFO] [stderr] Adding yansi v0.5.1 (latest: v1.0.1) [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 refpool v0.4.3 [INFO] [stderr] Downloaded metrohash v1.0.6 [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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] a082145c3afb9c9615405ac7fedfe21624a231ac6dc93dd73a77016ad55b46f3 [INFO] running `Command { std: "docker" "start" "-a" "a082145c3afb9c9615405ac7fedfe21624a231ac6dc93dd73a77016ad55b46f3", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "a082145c3afb9c9615405ac7fedfe21624a231ac6dc93dd73a77016ad55b46f3", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "a082145c3afb9c9615405ac7fedfe21624a231ac6dc93dd73a77016ad55b46f3", kill_on_drop: false }` [INFO] [stdout] a082145c3afb9c9615405ac7fedfe21624a231ac6dc93dd73a77016ad55b46f3 [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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] c6d012ff37ffaf2b4bd77622d174cc01ec62575ad85519427accf16a18671a11 [INFO] running `Command { std: "docker" "start" "-a" "c6d012ff37ffaf2b4bd77622d174cc01ec62575ad85519427accf16a18671a11", kill_on_drop: false }` [INFO] [stderr] Compiling rustix v0.38.32 [INFO] [stderr] Checking linux-raw-sys v0.4.13 [INFO] [stderr] Compiling syn v0.15.44 [INFO] [stderr] Compiling num-traits v0.2.18 [INFO] [stderr] Compiling im v15.1.0 (/opt/rustwide/workdir) [INFO] [stderr] Checking bit-vec v0.6.3 [INFO] [stderr] Checking getrandom v0.2.12 [INFO] [stderr] Checking wait-timeout v0.2.0 [INFO] [stderr] Checking diff v0.1.13 [INFO] [stderr] Checking unarray v0.1.4 [INFO] [stderr] Checking yansi v0.5.1 [INFO] [stderr] Checking metrohash v1.0.6 [INFO] [stderr] Checking pretty_assertions v1.4.0 [INFO] [stderr] Checking rand_core v0.6.4 [INFO] [stderr] Checking bit-set v0.5.3 [INFO] [stderr] Checking rand_chacha v0.3.1 [INFO] [stderr] Checking rand_xoshiro v0.6.0 [INFO] [stderr] Checking rand_xorshift v0.3.0 [INFO] [stderr] Checking rand v0.8.5 [INFO] [stdout] warning: the feature `specialization` is incomplete and may not be safe to use and/or cause compiler crashes [INFO] [stdout] --> src/lib.rs:341:41 [INFO] [stdout] | [INFO] [stdout] 341 | #![cfg_attr(has_specialisation, feature(specialization))] [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: see issue #31844 for more information [INFO] [stdout] = help: consider using `min_specialization` instead, which is more stable and complete [INFO] [stdout] = note: `#[warn(incomplete_features)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: the item `Iterator` is imported redundantly [INFO] [stdout] --> src/ord/map.rs:25:31 [INFO] [stdout] | [INFO] [stdout] 25 | use std::iter::{FromIterator, Iterator, Sum}; [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] --> /rustc/ceab6128fa48a616bfd3e3adf4bc80133b8ee223/library/std/src/prelude/mod.rs:134:13 [INFO] [stdout] | [INFO] [stdout] = note: the item `Iterator` is already defined here [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: the item `IntoIterator` is imported redundantly [INFO] [stdout] --> src/ord/set.rs:25:31 [INFO] [stdout] | [INFO] [stdout] 25 | use std::iter::{FromIterator, IntoIterator, Sum}; [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] --> /rustc/ceab6128fa48a616bfd3e3adf4bc80133b8ee223/library/std/src/prelude/mod.rs:134:13 [INFO] [stdout] | [INFO] [stdout] = note: the item `IntoIterator` is already defined here [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: the item `IntoIterator` is imported redundantly [INFO] [stdout] --> src/hash/set.rs:31:31 [INFO] [stdout] | [INFO] [stdout] 31 | use std::iter::{FromIterator, IntoIterator, Sum}; [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] --> /rustc/ceab6128fa48a616bfd3e3adf4bc80133b8ee223/library/std/src/prelude/mod.rs:134:13 [INFO] [stdout] | [INFO] [stdout] = note: the item `IntoIterator` is already defined here [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 4 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Checking tempfile v3.10.1 [INFO] [stderr] Checking rusty-fork v0.3.0 [INFO] [stderr] Checking proptest v1.4.0 [INFO] [stderr] Compiling proptest-derive v0.3.0 [INFO] [stdout] warning: the feature `specialization` is incomplete and may not be safe to use and/or cause compiler crashes [INFO] [stdout] --> src/lib.rs:341:41 [INFO] [stdout] | [INFO] [stdout] 341 | #![cfg_attr(has_specialisation, feature(specialization))] [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: see issue #31844 for more information [INFO] [stdout] = help: consider using `min_specialization` instead, which is more stable and complete [INFO] [stdout] = note: `#[warn(incomplete_features)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: the item `Iterator` is imported redundantly [INFO] [stdout] --> src/ord/map.rs:25:31 [INFO] [stdout] | [INFO] [stdout] 25 | use std::iter::{FromIterator, Iterator, Sum}; [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] --> /rustc/ceab6128fa48a616bfd3e3adf4bc80133b8ee223/library/std/src/prelude/mod.rs:134:13 [INFO] [stdout] | [INFO] [stdout] = note: the item `Iterator` is already defined here [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: the item `IntoIterator` is imported redundantly [INFO] [stdout] --> src/ord/set.rs:25:31 [INFO] [stdout] | [INFO] [stdout] 25 | use std::iter::{FromIterator, IntoIterator, Sum}; [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] --> /rustc/ceab6128fa48a616bfd3e3adf4bc80133b8ee223/library/std/src/prelude/mod.rs:134:13 [INFO] [stdout] | [INFO] [stdout] = note: the item `IntoIterator` is already defined here [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: the item `IntoIterator` is imported redundantly [INFO] [stdout] --> src/hash/set.rs:31:31 [INFO] [stdout] | [INFO] [stdout] 31 | use std::iter::{FromIterator, IntoIterator, Sum}; [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] --> /rustc/ceab6128fa48a616bfd3e3adf4bc80133b8ee223/library/std/src/prelude/mod.rs:134:13 [INFO] [stdout] | [INFO] [stdout] = note: the item `IntoIterator` is already defined here [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: call to `.deref()` on a reference in this situation does nothing [INFO] [stdout] --> src/ser.rs:141:34 [INFO] [stdout] | [INFO] [stdout] 141 | s.serialize_element(i.deref())?; [INFO] [stdout] | ^^^^^^^^ help: remove this redundant call [INFO] [stdout] | [INFO] [stdout] = note: the type `A` does not implement `Deref`, so calling `deref` on `&A` copies the reference, which does not do anything and can be removed [INFO] [stdout] = note: `#[warn(noop_method_call)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: call to `.deref()` on a reference in this situation does nothing [INFO] [stdout] --> src/ser.rs:167:32 [INFO] [stdout] | [INFO] [stdout] 167 | s.serialize_entry(k.deref(), v.deref())?; [INFO] [stdout] | ^^^^^^^^ help: remove this redundant call [INFO] [stdout] | [INFO] [stdout] = note: the type `K` does not implement `Deref`, so calling `deref` on `&K` copies the reference, which does not do anything and can be removed [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: call to `.deref()` on a reference in this situation does nothing [INFO] [stdout] --> src/ser.rs:167:43 [INFO] [stdout] | [INFO] [stdout] 167 | s.serialize_entry(k.deref(), v.deref())?; [INFO] [stdout] | ^^^^^^^^ help: remove this redundant call [INFO] [stdout] | [INFO] [stdout] = note: the type `V` does not implement `Deref`, so calling `deref` on `&V` copies the reference, which does not do anything and can be removed [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: call to `.deref()` on a reference in this situation does nothing [INFO] [stdout] --> src/ser.rs:201:32 [INFO] [stdout] | [INFO] [stdout] 201 | s.serialize_entry(k.deref(), v.deref())?; [INFO] [stdout] | ^^^^^^^^ help: remove this redundant call [INFO] [stdout] | [INFO] [stdout] = note: the type `K` does not implement `Deref`, so calling `deref` on `&K` copies the reference, which does not do anything and can be removed [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: call to `.deref()` on a reference in this situation does nothing [INFO] [stdout] --> src/ser.rs:201:43 [INFO] [stdout] | [INFO] [stdout] 201 | s.serialize_entry(k.deref(), v.deref())?; [INFO] [stdout] | ^^^^^^^^ help: remove this redundant call [INFO] [stdout] | [INFO] [stdout] = note: the type `V` does not implement `Deref`, so calling `deref` on `&V` copies the reference, which does not do anything and can be removed [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: call to `.deref()` on a reference in this situation does nothing [INFO] [stdout] --> src/ser.rs:227:34 [INFO] [stdout] | [INFO] [stdout] 227 | s.serialize_element(i.deref())?; [INFO] [stdout] | ^^^^^^^^ help: remove this redundant call [INFO] [stdout] | [INFO] [stdout] = note: the type `A` does not implement `Deref`, so calling `deref` on `&A` copies the reference, which does not do anything and can be removed [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: call to `.deref()` on a reference in this situation does nothing [INFO] [stdout] --> src/ser.rs:251:34 [INFO] [stdout] | [INFO] [stdout] 251 | s.serialize_element(i.deref())?; [INFO] [stdout] | ^^^^^^^^ help: remove this redundant call [INFO] [stdout] | [INFO] [stdout] = note: the type `A` does not implement `Deref`, so calling `deref` on `&A` copies the reference, which does not do anything and can be removed [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 11 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 6.05s [INFO] running `Command { std: "docker" "inspect" "c6d012ff37ffaf2b4bd77622d174cc01ec62575ad85519427accf16a18671a11", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "c6d012ff37ffaf2b4bd77622d174cc01ec62575ad85519427accf16a18671a11", kill_on_drop: false }` [INFO] [stdout] c6d012ff37ffaf2b4bd77622d174cc01ec62575ad85519427accf16a18671a11