[INFO] fetching crate fscmp 0.2.16... [INFO] checking fscmp-0.2.16 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577 [INFO] extracting crate fscmp 0.2.16 into /workspace/builds/worker-5-tc2/source [INFO] started tweaking crates.io crate fscmp 0.2.16 [INFO] finished tweaking crates.io crate fscmp 0.2.16 [INFO] tweaked toml for crates.io crate fscmp 0.2.16 written to /workspace/builds/worker-5-tc2/source/Cargo.toml [INFO] validating manifest of crates.io crate fscmp 0.2.16 on toolchain 4f260f0f20b3133d20cfb50353c0221943af5796 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] crate crates.io crate fscmp 0.2.16 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" "+4f260f0f20b3133d20cfb50353c0221943af5796" "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-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] c7be2e2d9049bdd92e7db4fc40aee6b0df189759096be2a44f2be51a525af0af [INFO] running `Command { std: "docker" "start" "-a" "c7be2e2d9049bdd92e7db4fc40aee6b0df189759096be2a44f2be51a525af0af", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "c7be2e2d9049bdd92e7db4fc40aee6b0df189759096be2a44f2be51a525af0af", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "c7be2e2d9049bdd92e7db4fc40aee6b0df189759096be2a44f2be51a525af0af", kill_on_drop: false }` [INFO] [stdout] c7be2e2d9049bdd92e7db4fc40aee6b0df189759096be2a44f2be51a525af0af [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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 -Dunmustuse_in_always_ok" "-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] b67197bbc54cf6d215e7c1c4c7a5253b99dd37a1c966484b06e311168ab99f58 [INFO] running `Command { std: "docker" "start" "-a" "b67197bbc54cf6d215e7c1c4c7a5253b99dd37a1c966484b06e311168ab99f58", kill_on_drop: false }` [INFO] [stderr] Compiling libc v0.2.62 [INFO] [stderr] Checking cfg-if v0.1.9 [INFO] [stderr] Compiling autocfg v0.1.6 [INFO] [stderr] Compiling proc-macro2 v1.0.3 [INFO] [stderr] Compiling arrayvec v0.4.11 [INFO] [stderr] Compiling syn v1.0.5 [INFO] [stderr] Compiling getrandom v0.1.12 [INFO] [stderr] Compiling bitflags v1.1.0 [INFO] [stderr] Checking nodrop v0.1.13 [INFO] [stderr] Compiling syn v0.15.44 [INFO] [stderr] Compiling cc v1.0.45 [INFO] [stderr] Checking scopeguard v1.0.0 [INFO] [stderr] Compiling byteorder v1.3.2 [INFO] [stderr] Compiling failure_derive v0.1.5 [INFO] [stderr] Compiling memoffset v0.5.1 [INFO] [stderr] Compiling rayon-core v1.6.0 [INFO] [stderr] Checking crossbeam-utils v0.6.6 [INFO] [stderr] Checking unicode-width v0.1.6 [INFO] [stderr] Checking ppv-lite86 v0.2.5 [INFO] [stderr] Compiling unicode-segmentation v1.3.0 [INFO] [stderr] Compiling log v0.4.8 [INFO] [stderr] Checking textwrap v0.11.0 [INFO] [stderr] Compiling num-traits v0.2.8 [INFO] [stderr] Compiling num-integer v0.1.41 [INFO] [stderr] Checking rustc-demangle v0.1.16 [INFO] [stderr] Compiling nix v0.16.0 [INFO] [stderr] Checking either v1.5.2 [INFO] [stderr] Checking crossbeam-queue v0.1.2 [INFO] [stderr] Checking same-file v1.0.5 [INFO] [stderr] Compiling heck v0.3.1 [INFO] [stderr] Checking crossbeam-epoch v0.7.2 [INFO] [stderr] Checking c2-chacha v0.2.2 [INFO] [stderr] Checking walkdir v2.2.9 [INFO] [stderr] Compiling backtrace-sys v0.1.31 [INFO] [stderr] Checking dirs v1.0.5 [INFO] [stderr] Checking num_cpus v1.10.1 [INFO] [stderr] Checking atty v0.2.13 [INFO] [stderr] Checking time v0.1.42 [INFO] [stderr] Checking openat v0.1.18 [INFO] [stderr] Checking crossbeam-deque v0.7.1 [INFO] [stderr] Checking clap v2.33.0 [INFO] [stderr] Compiling quote v1.0.2 [INFO] [stderr] Checking term v0.5.2 [INFO] [stderr] Checking rand_core v0.5.1 [INFO] [stderr] Checking rand_chacha v0.2.1 [INFO] [stderr] Checking rand v0.7.0 [INFO] [stderr] Checking rayon v1.2.0 [INFO] [stderr] Checking chrono v0.4.9 [INFO] [stderr] Checking backtrace v0.3.37 [INFO] [stderr] Compiling synstructure v0.10.2 [INFO] [stderr] Checking tempfile v3.1.0 [INFO] [stderr] Checking simplelog v0.7.1 [INFO] [stderr] Checking failure v0.1.5 [INFO] [stderr] Compiling proc-macro-error v0.2.6 [INFO] [stderr] Compiling structopt-derive v0.3.1 [INFO] [stderr] Checking structopt v0.3.1 [INFO] [stderr] Checking fscmp v0.2.16 (/opt/rustwide/workdir) [INFO] [stdout] warning: unnecessary parentheses around closure body [INFO] [stdout] --> src/cmp/mod.rs:313:22 [INFO] [stdout] | [INFO] [stdout] 313 | .map(|i| ((i * leap)..min(size, i * leap + BUF_SIZE_U64))) [INFO] [stdout] | ^ ^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] help: remove these parentheses [INFO] [stdout] | [INFO] [stdout] 313 - .map(|i| ((i * leap)..min(size, i * leap + BUF_SIZE_U64))) [INFO] [stdout] 313 + .map(|i| (i * leap)..min(size, i * leap + BUF_SIZE_U64) ) [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unnecessary parentheses around closure body [INFO] [stdout] --> src/cmp/mod.rs:313:22 [INFO] [stdout] | [INFO] [stdout] 313 | .map(|i| ((i * leap)..min(size, i * leap + BUF_SIZE_U64))) [INFO] [stdout] | ^ ^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] help: remove these parentheses [INFO] [stdout] | [INFO] [stdout] 313 - .map(|i| ((i * leap)..min(size, i * leap + BUF_SIZE_U64))) [INFO] [stdout] 313 + .map(|i| (i * leap)..min(size, i * leap + BUF_SIZE_U64) ) [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: this type will no longer be must used: Result [INFO] [stdout] --> src/main.rs:27:17 [INFO] [stdout] | [INFO] [stdout] 27 | #[derive(Debug, StructOpt)] [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: requested on the command line with `-D unmustuse-in-always-ok` [INFO] [stdout] = note: this error originates in the derive macro `StructOpt` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: the type `[u8; 262144]` does not permit being left uninitialized [INFO] [stdout] --> src/cmp/mod.rs:323:58 [INFO] [stdout] | [INFO] [stdout] 323 | let mut buffer1 = AlignedBuffer(unsafe { std::mem::MaybeUninit::uninit().assume_init() }); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | this code causes undefined behavior when executed [INFO] [stdout] | help: use `MaybeUninit` instead, and only call `assume_init` after initialization is done [INFO] [stdout] | [INFO] [stdout] = note: integers must be initialized [INFO] [stdout] = note: `#[warn(invalid_value)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: the type `[u8; 262144]` does not permit being left uninitialized [INFO] [stdout] --> src/cmp/mod.rs:324:58 [INFO] [stdout] | [INFO] [stdout] 324 | let mut buffer2 = AlignedBuffer(unsafe { std::mem::MaybeUninit::uninit().assume_init() }); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | this code causes undefined behavior when executed [INFO] [stdout] | help: use `MaybeUninit` instead, and only call `assume_init` after initialization is done [INFO] [stdout] | [INFO] [stdout] = note: integers must be initialized [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: this type will no longer be must used: Result [INFO] [stdout] --> src/main.rs:27:17 [INFO] [stdout] | [INFO] [stdout] 27 | #[derive(Debug, StructOpt)] [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: requested on the command line with `-D unmustuse-in-always-ok` [INFO] [stdout] = note: this error originates in the derive macro `StructOpt` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: the type `[u8; 262144]` does not permit being left uninitialized [INFO] [stdout] --> src/cmp/mod.rs:323:58 [INFO] [stdout] | [INFO] [stdout] 323 | let mut buffer1 = AlignedBuffer(unsafe { std::mem::MaybeUninit::uninit().assume_init() }); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | this code causes undefined behavior when executed [INFO] [stdout] | help: use `MaybeUninit` instead, and only call `assume_init` after initialization is done [INFO] [stdout] | [INFO] [stdout] = note: integers must be initialized [INFO] [stdout] = note: `#[warn(invalid_value)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: the type `[u8; 262144]` does not permit being left uninitialized [INFO] [stdout] --> src/cmp/mod.rs:324:58 [INFO] [stdout] | [INFO] [stdout] 324 | let mut buffer2 = AlignedBuffer(unsafe { std::mem::MaybeUninit::uninit().assume_init() }); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | this code causes undefined behavior when executed [INFO] [stdout] | help: use `MaybeUninit` instead, and only call `assume_init` after initialization is done [INFO] [stdout] | [INFO] [stdout] = note: integers must be initialized [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] error: could not compile `fscmp` (bin "fscmp") due to 1 previous error; 3 warnings emitted [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] [stderr] error: could not compile `fscmp` (bin "fscmp" test) due to 1 previous error; 3 warnings emitted [INFO] running `Command { std: "docker" "inspect" "b67197bbc54cf6d215e7c1c4c7a5253b99dd37a1c966484b06e311168ab99f58", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "b67197bbc54cf6d215e7c1c4c7a5253b99dd37a1c966484b06e311168ab99f58", kill_on_drop: false }` [INFO] [stdout] b67197bbc54cf6d215e7c1c4c7a5253b99dd37a1c966484b06e311168ab99f58