[INFO] fetching crate im-rc 15.0.0... [INFO] checking im-rc-15.0.0 against master#8007b506ac5da629f223b755f5a5391edd5f6d01 for pr-88041 [INFO] extracting crate im-rc 15.0.0 into /workspace/builds/worker-1/source [INFO] validating manifest of crates.io crate im-rc 15.0.0 on toolchain 8007b506ac5da629f223b755f5a5391edd5f6d01 [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking crates.io crate im-rc 15.0.0 [INFO] finished tweaking crates.io crate im-rc 15.0.0 [INFO] tweaked toml for crates.io crate im-rc 15.0.0 written to /workspace/builds/worker-1/source/Cargo.toml [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }` [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 59ebd68744aa1ce57af35332bdfe3ce79e30b2986fa4649c25d59b49570fee68 [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] running `Command { std: "docker" "start" "-a" "59ebd68744aa1ce57af35332bdfe3ce79e30b2986fa4649c25d59b49570fee68", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "59ebd68744aa1ce57af35332bdfe3ce79e30b2986fa4649c25d59b49570fee68", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "59ebd68744aa1ce57af35332bdfe3ce79e30b2986fa4649c25d59b49570fee68", kill_on_drop: false }` [INFO] [stdout] 59ebd68744aa1ce57af35332bdfe3ce79e30b2986fa4649c25d59b49570fee68 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 9dcd47ddd37bc1368e149570331398969b708956814ee275fd232d168654b471 [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] running `Command { std: "docker" "start" "-a" "9dcd47ddd37bc1368e149570331398969b708956814ee275fd232d168654b471", kill_on_drop: false }` [INFO] [stderr] Compiling libc v0.2.99 [INFO] [stderr] Checking cfg-if v1.0.0 [INFO] [stderr] Compiling autocfg v1.0.1 [INFO] [stderr] Compiling getrandom v0.1.16 [INFO] [stderr] Compiling crossbeam-utils v0.8.5 [INFO] [stderr] Checking ppv-lite86 v0.2.10 [INFO] [stderr] Compiling crossbeam-epoch v0.9.5 [INFO] [stderr] Compiling typenum v1.13.0 [INFO] [stderr] Compiling rayon-core v1.9.1 [INFO] [stderr] Compiling syn v0.15.44 [INFO] [stderr] Compiling ryu v1.0.5 [INFO] [stderr] Compiling version_check v0.9.3 [INFO] [stderr] Checking bit-vec v0.6.3 [INFO] [stderr] Checking itoa v0.4.7 [INFO] [stderr] Checking bitflags v1.3.1 [INFO] [stderr] Checking either v1.6.1 [INFO] [stderr] Checking regex-syntax v0.6.25 [INFO] [stderr] Compiling rand v0.6.5 [INFO] [stderr] Checking pretty_assertions v0.6.1 [INFO] [stderr] Checking bit-set v0.5.2 [INFO] [stderr] Compiling im-rc v15.0.0 (/opt/rustwide/workdir) [INFO] [stderr] Compiling memoffset v0.6.4 [INFO] [stderr] Compiling num-traits v0.2.14 [INFO] [stderr] Compiling rayon v1.5.1 [INFO] [stderr] Checking serde_json v1.0.66 [INFO] [stderr] Checking crossbeam-channel v0.5.1 [INFO] [stderr] Checking crossbeam-deque v0.8.1 [INFO] [stderr] Checking getrandom v0.2.3 [INFO] [stderr] Checking wait-timeout v0.2.0 [INFO] [stderr] Checking rand_os v0.1.3 [INFO] [stderr] Checking num_cpus v1.13.0 [INFO] [stderr] Checking rand_core v0.6.3 [INFO] [stderr] Checking rand_core v0.5.1 [INFO] [stderr] Checking bitmaps v2.1.0 [INFO] [stderr] Checking rand_pcg v0.2.1 [INFO] [stderr] Checking rand_xoshiro v0.4.0 [INFO] [stderr] Checking rand_chacha v0.2.2 [INFO] [stderr] Checking rand_chacha v0.3.1 [INFO] [stderr] Checking rand v0.8.4 [INFO] [stderr] Checking rand v0.7.3 [INFO] [stderr] Checking tempfile v3.2.0 [INFO] [stderr] Checking rusty-fork v0.2.2 [INFO] [stderr] Checking proptest v0.9.6 [INFO] [stderr] Checking sized-chunks v0.6.5 [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: `#[warn(incomplete_features)]` on by default [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] [INFO] [stdout] [INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used [INFO] [stdout] --> src/vector/mod.rs:986:13 [INFO] [stdout] | [INFO] [stdout] 986 | replace(self, other); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_must_use)]` on by default [INFO] [stdout] = note: if you don't need the old value, you can just assign the new value directly [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 2 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Compiling proptest-derive v0.1.2 [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: `#[warn(incomplete_features)]` on by default [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] [INFO] [stdout] [INFO] [stdout] warning: panic message is not a string literal [INFO] [stdout] --> src/vector/mod.rs:2532:43 [INFO] [stdout] | [INFO] [stdout] 2532 | assert!(!input.ptr_eq(&inp2), len); [INFO] [stdout] | ^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(non_fmt_panics)]` on by default [INFO] [stdout] = note: this usage of panic!() is deprecated; it will be a hard error in Rust 2021 [INFO] [stdout] = note: for more information, see [INFO] [stdout] help: add a "{}" format string to Display the message [INFO] [stdout] | [INFO] [stdout] 2532 | assert!(!input.ptr_eq(&inp2), "{}", len); [INFO] [stdout] | +++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used [INFO] [stdout] --> src/vector/mod.rs:986:13 [INFO] [stdout] | [INFO] [stdout] 986 | replace(self, other); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_must_use)]` on by default [INFO] [stdout] = note: if you don't need the old value, you can just assign the new value directly [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 3 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 28.32s [INFO] running `Command { std: "docker" "inspect" "9dcd47ddd37bc1368e149570331398969b708956814ee275fd232d168654b471", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "9dcd47ddd37bc1368e149570331398969b708956814ee275fd232d168654b471", kill_on_drop: false }` [INFO] [stdout] 9dcd47ddd37bc1368e149570331398969b708956814ee275fd232d168654b471