[INFO] cloning repository https://github.com/mchlstckl/wordcount [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mchlstckl/wordcount" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmchlstckl%2Fwordcount", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmchlstckl%2Fwordcount'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 2d5a8330a6d1a4f948a9a8a7a2896dc48c4c31a3 [INFO] checking mchlstckl/wordcount against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmchlstckl%2Fwordcount" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/mchlstckl/wordcount 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 git repo https://github.com/mchlstckl/wordcount [INFO] finished tweaking git repo https://github.com/mchlstckl/wordcount [INFO] tweaked toml for git repo https://github.com/mchlstckl/wordcount written to /workspace/builds/worker-5-tc1/source/Cargo.toml [INFO] crate git repo https://github.com/mchlstckl/wordcount 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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Downloading crates ... [INFO] [stderr] Downloaded structopt v0.2.14 [INFO] [stderr] Downloaded criterion-plot v0.3.0 [INFO] [stderr] Downloaded tokio-current-thread v0.1.5 [INFO] [stderr] Downloaded textwrap v0.10.0 [INFO] [stderr] Downloaded csv-core v0.1.5 [INFO] [stderr] Downloaded serde_derive v1.0.87 [INFO] [stderr] Downloaded criterion v0.2.10 [INFO] [stderr] Downloaded clap v2.32.0 [INFO] [stderr] Downloaded libc v0.2.48 [INFO] [stderr] Downloaded tinytemplate v1.0.1 [INFO] [stderr] Downloaded structopt-derive v0.2.14 [INFO] [stderr] Downloaded csv v1.0.5 [INFO] [stderr] Downloaded tokio-threadpool v0.1.12 [INFO] [stderr] Downloaded tokio-sync v0.1.3 [INFO] [stderr] Downloaded rand_os v0.1.2 [INFO] [stderr] Downloaded tokio-executor v0.1.6 [INFO] [stderr] Downloaded tokio v0.1.16 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 0d0a0b00cc93d74ae7f2211abac7cfdcb00613e655d8438bf516580d1489cfdc [INFO] running `Command { std: "docker" "start" "-a" "0d0a0b00cc93d74ae7f2211abac7cfdcb00613e655d8438bf516580d1489cfdc", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "0d0a0b00cc93d74ae7f2211abac7cfdcb00613e655d8438bf516580d1489cfdc", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "0d0a0b00cc93d74ae7f2211abac7cfdcb00613e655d8438bf516580d1489cfdc", kill_on_drop: false }` [INFO] [stdout] 0d0a0b00cc93d74ae7f2211abac7cfdcb00613e655d8438bf516580d1489cfdc [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 95623cbf46473e007d801fda8b08696acc2017c9d6b48e65a7f88b39d895c367 [INFO] running `Command { std: "docker" "start" "-a" "95623cbf46473e007d801fda8b08696acc2017c9d6b48e65a7f88b39d895c367", kill_on_drop: false }` [INFO] [stderr] Compiling libc v0.2.48 [INFO] [stderr] Compiling byteorder v1.3.1 [INFO] [stderr] Checking futures v0.1.25 [INFO] [stderr] Compiling arrayvec v0.4.10 [INFO] [stderr] Checking memoffset v0.2.1 [INFO] [stderr] Checking smallvec v0.6.9 [INFO] [stderr] Checking crossbeam-utils v0.6.5 [INFO] [stderr] Checking log v0.4.6 [INFO] [stderr] Compiling memchr v2.2.0 [INFO] [stderr] Checking crossbeam-utils v0.2.2 [INFO] [stderr] Compiling rayon-core v1.4.1 [INFO] [stderr] Checking either v1.5.0 [INFO] [stderr] Compiling serde v1.0.87 [INFO] [stderr] Compiling quote v0.6.11 [INFO] [stderr] Checking textwrap v0.10.0 [INFO] [stderr] Compiling rayon v1.0.3 [INFO] [stderr] Compiling unicode-segmentation v1.2.1 [INFO] [stderr] Checking strsim v0.7.0 [INFO] [stderr] Compiling syn v0.15.26 [INFO] [stderr] Compiling ryu v0.2.7 [INFO] [stderr] Compiling regex v1.1.0 [INFO] [stderr] Checking regex-syntax v0.6.5 [INFO] [stderr] Checking itoa v0.4.3 [INFO] [stderr] Compiling num-traits v0.2.6 [INFO] [stderr] Checking itertools v0.8.0 [INFO] [stderr] Checking crossbeam-queue v0.1.2 [INFO] [stderr] Compiling heck v0.3.1 [INFO] [stderr] Checking crossbeam-channel v0.3.8 [INFO] [stderr] Checking crossbeam-epoch v0.7.1 [INFO] [stderr] Checking crossbeam-epoch v0.3.1 [INFO] [stderr] Checking iovec v0.1.2 [INFO] [stderr] Checking rand_os v0.1.2 [INFO] [stderr] Checking num_cpus v1.10.0 [INFO] [stderr] Checking net2 v0.2.33 [INFO] [stderr] Checking atty v0.2.11 [INFO] [stderr] Checking crossbeam-deque v0.2.0 [INFO] [stderr] Checking clap v2.32.0 [INFO] [stderr] Checking bytes v0.4.11 [INFO] [stderr] Checking hashbrown v0.1.8 [INFO] [stderr] Checking criterion-plot v0.3.0 [INFO] [stderr] Checking rand_xoshiro v0.1.0 [INFO] [stderr] Checking rand v0.6.5 [INFO] [stderr] Checking aho-corasick v0.6.9 [INFO] [stderr] Checking csv-core v0.1.5 [INFO] [stderr] Checking crossbeam-deque v0.7.1 [INFO] [stderr] Checking mio v0.6.16 [INFO] [stderr] Checking tokio-executor v0.1.6 [INFO] [stderr] Checking tokio-io v0.1.12 [INFO] [stderr] Checking tokio-sync v0.1.3 [INFO] [stderr] Checking tokio-timer v0.2.10 [INFO] [stderr] Checking tokio-current-thread v0.1.5 [INFO] [stderr] Compiling structopt-derive v0.2.14 [INFO] [stderr] Compiling serde_derive v1.0.87 [INFO] [stderr] Checking tokio-codec v0.1.1 [INFO] [stderr] Checking mio-uds v0.6.7 [INFO] [stderr] Checking parking_lot_core v0.4.0 [INFO] [stderr] Checking tokio-threadpool v0.1.12 [INFO] [stderr] Checking parking_lot v0.7.1 [INFO] [stderr] Checking tokio-reactor v0.1.9 [INFO] [stderr] Checking tokio-fs v0.1.6 [INFO] [stderr] Checking tokio-tcp v0.1.3 [INFO] [stderr] Checking tokio-uds v0.2.5 [INFO] [stderr] Checking tokio-udp v0.1.3 [INFO] [stderr] Checking tokio v0.1.16 [INFO] [stderr] Checking structopt v0.2.14 [INFO] [stderr] Checking wordcount v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: the item `future` is imported redundantly [INFO] [stdout] --> src/lib.rs:3:15 [INFO] [stdout] | [INFO] [stdout] 3 | use futures::{future, stream, Stream}; [INFO] [stdout] | ^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 9 | use tokio::prelude::*; [INFO] [stdout] | ----------------- the item `future` is already imported here [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: the item `stream` is imported redundantly [INFO] [stdout] --> src/lib.rs:3:23 [INFO] [stdout] | [INFO] [stdout] 3 | use futures::{future, stream, Stream}; [INFO] [stdout] | ^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 9 | use tokio::prelude::*; [INFO] [stdout] | ----------------- the item `stream` is already imported here [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: the item `Stream` is imported redundantly [INFO] [stdout] --> src/lib.rs:3:31 [INFO] [stdout] | [INFO] [stdout] 3 | use futures::{future, stream, Stream}; [INFO] [stdout] | ^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 9 | use tokio::prelude::*; [INFO] [stdout] | ----------------- the item `Stream` is already imported here [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: a method with this name may be added to the standard library in the future [INFO] [stdout] --> src/lib.rs:148:18 [INFO] [stdout] | [INFO] [stdout] 148 | file.read_buf(&mut data) [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior! [INFO] [stdout] = note: for more information, see issue #48919 [INFO] [stdout] = help: call with fully qualified syntax `tokio::io::AsyncRead::read_buf(...)` to keep using the current method [INFO] [stdout] = note: `#[warn(unstable_name_collisions)]` on by default [INFO] [stdout] help: add `#![feature(read_buf)]` to the crate attributes to enable `std::io::Read::read_buf` [INFO] [stdout] | [INFO] [stdout] 1 + #![feature(read_buf)] [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 4 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: the item `wordcount` is imported redundantly [INFO] [stdout] --> src/bin/wc.rs:12:5 [INFO] [stdout] | [INFO] [stdout] 12 | use wordcount; [INFO] [stdout] | ^^^^^^^^^ the item `wordcount` is already defined by prelude [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] [stderr] Checking serde_json v1.0.38 [INFO] [stderr] Checking csv v1.0.5 [INFO] [stderr] Checking tinytemplate v1.0.1 [INFO] [stderr] Checking criterion v0.2.10 [INFO] [stdout] warning: the item `future` is imported redundantly [INFO] [stdout] --> src/lib.rs:3:15 [INFO] [stdout] | [INFO] [stdout] 3 | use futures::{future, stream, Stream}; [INFO] [stdout] | ^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 9 | use tokio::prelude::*; [INFO] [stdout] | ----------------- the item `future` is already imported here [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: the item `stream` is imported redundantly [INFO] [stdout] --> src/lib.rs:3:23 [INFO] [stdout] | [INFO] [stdout] 3 | use futures::{future, stream, Stream}; [INFO] [stdout] | ^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 9 | use tokio::prelude::*; [INFO] [stdout] | ----------------- the item `stream` is already imported here [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: the item `Stream` is imported redundantly [INFO] [stdout] --> src/lib.rs:3:31 [INFO] [stdout] | [INFO] [stdout] 3 | use futures::{future, stream, Stream}; [INFO] [stdout] | ^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 9 | use tokio::prelude::*; [INFO] [stdout] | ----------------- the item `Stream` is already imported here [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: the item `wordcount` is imported redundantly [INFO] [stdout] --> src/bin/wc.rs:12:5 [INFO] [stdout] | [INFO] [stdout] 12 | use wordcount; [INFO] [stdout] | ^^^^^^^^^ the item `wordcount` is already defined by prelude [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: a method with this name may be added to the standard library in the future [INFO] [stdout] --> src/lib.rs:148:18 [INFO] [stdout] | [INFO] [stdout] 148 | file.read_buf(&mut data) [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior! [INFO] [stdout] = note: for more information, see issue #48919 [INFO] [stdout] = help: call with fully qualified syntax `tokio::io::AsyncRead::read_buf(...)` to keep using the current method [INFO] [stdout] = note: `#[warn(unstable_name_collisions)]` on by default [INFO] [stdout] help: add `#![feature(read_buf)]` to the crate attributes to enable `std::io::Read::read_buf` [INFO] [stdout] | [INFO] [stdout] 1 + #![feature(read_buf)] [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: the item `wordcount` is imported redundantly [INFO] [stdout] --> benches/benchmarks.rs:6:5 [INFO] [stdout] | [INFO] [stdout] 6 | use wordcount; [INFO] [stdout] | ^^^^^^^^^ the item `wordcount` is already defined by prelude [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: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 4 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 14.74s [INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: criterion v0.2.10 [INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 5` [INFO] running `Command { std: "docker" "inspect" "95623cbf46473e007d801fda8b08696acc2017c9d6b48e65a7f88b39d895c367", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "95623cbf46473e007d801fda8b08696acc2017c9d6b48e65a7f88b39d895c367", kill_on_drop: false }` [INFO] [stdout] 95623cbf46473e007d801fda8b08696acc2017c9d6b48e65a7f88b39d895c367