[INFO] fetching crate x86reducer 0.1.0... [INFO] checking x86reducer-0.1.0 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577 [INFO] extracting crate x86reducer 0.1.0 into /workspace/builds/worker-6-tc2/source [INFO] started tweaking crates.io crate x86reducer 0.1.0 [INFO] finished tweaking crates.io crate x86reducer 0.1.0 [INFO] tweaked toml for crates.io crate x86reducer 0.1.0 written to /workspace/builds/worker-6-tc2/source/Cargo.toml [INFO] validating manifest of crates.io crate x86reducer 0.1.0 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 x86reducer 0.1.0 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-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 8c685d0b9934e29dd7e6005970d04d1a022364bf11e1695af42a20ea8d5811de [INFO] running `Command { std: "docker" "start" "-a" "8c685d0b9934e29dd7e6005970d04d1a022364bf11e1695af42a20ea8d5811de", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "8c685d0b9934e29dd7e6005970d04d1a022364bf11e1695af42a20ea8d5811de", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "8c685d0b9934e29dd7e6005970d04d1a022364bf11e1695af42a20ea8d5811de", kill_on_drop: false }` [INFO] [stdout] 8c685d0b9934e29dd7e6005970d04d1a022364bf11e1695af42a20ea8d5811de [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 373d5166a871e362bd71b9704d1d3e1e14cceef1c9b12235fc93e792d7ba04ad [INFO] running `Command { std: "docker" "start" "-a" "373d5166a871e362bd71b9704d1d3e1e14cceef1c9b12235fc93e792d7ba04ad", kill_on_drop: false }` [INFO] [stderr] Compiling syn v1.0.86 [INFO] [stderr] Compiling memchr v2.4.1 [INFO] [stderr] Compiling libc v0.2.116 [INFO] [stderr] Checking textwrap v0.14.2 [INFO] [stderr] Checking either v1.6.1 [INFO] [stderr] Checking termcolor v1.1.2 [INFO] [stderr] Compiling indexmap v1.8.0 [INFO] [stderr] Compiling proc-macro-error-attr v1.0.4 [INFO] [stderr] Checking itertools v0.10.3 [INFO] [stderr] Checking os_str_bytes v6.0.0 [INFO] [stderr] Checking atty v0.2.14 [INFO] [stderr] Compiling proc-macro-error v1.0.4 [INFO] [stderr] Compiling clap_derive v3.0.14 [INFO] [stderr] Checking clap v3.0.14 [INFO] [stderr] Checking x86reducer v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: field `0` is never read [INFO] [stdout] --> src/disasm.rs:6:17 [INFO] [stdout] | [INFO] [stdout] 6 | FileIOError(String), [INFO] [stdout] | ----------- ^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | field in this variant [INFO] [stdout] | [INFO] [stdout] = note: `DisasmError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field [INFO] [stdout] | [INFO] [stdout] 6 - FileIOError(String), [INFO] [stdout] 6 + FileIOError(()), [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: this type will no longer be must used: Result [INFO] [stdout] --> src/main.rs:16:5 [INFO] [stdout] | [INFO] [stdout] 16 | / /// The x86 binary to open and parse. [INFO] [stdout] 17 | | #[clap(short, long)] [INFO] [stdout] 18 | | input: Option, [INFO] [stdout] | |_________________________^ [INFO] [stdout] | [INFO] [stdout] = note: requested on the command line with `-D unmustuse-in-always-ok` [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] error: could not compile `x86reducer` (bin "x86reducer") due to 1 previous error; 1 warning emitted [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] [stdout] warning: field `0` is never read [INFO] [stdout] --> src/disasm.rs:6:17 [INFO] [stdout] | [INFO] [stdout] 6 | FileIOError(String), [INFO] [stdout] | ----------- ^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | field in this variant [INFO] [stdout] | [INFO] [stdout] = note: `DisasmError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field [INFO] [stdout] | [INFO] [stdout] 6 - FileIOError(String), [INFO] [stdout] 6 + FileIOError(()), [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: this type will no longer be must used: Result [INFO] [stdout] --> src/main.rs:16:5 [INFO] [stdout] | [INFO] [stdout] 16 | / /// The x86 binary to open and parse. [INFO] [stdout] 17 | | #[clap(short, long)] [INFO] [stdout] 18 | | input: Option, [INFO] [stdout] | |_________________________^ [INFO] [stdout] | [INFO] [stdout] = note: requested on the command line with `-D unmustuse-in-always-ok` [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] error: could not compile `x86reducer` (bin "x86reducer" test) due to 1 previous error; 1 warning emitted [INFO] running `Command { std: "docker" "inspect" "373d5166a871e362bd71b9704d1d3e1e14cceef1c9b12235fc93e792d7ba04ad", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "373d5166a871e362bd71b9704d1d3e1e14cceef1c9b12235fc93e792d7ba04ad", kill_on_drop: false }` [INFO] [stdout] 373d5166a871e362bd71b9704d1d3e1e14cceef1c9b12235fc93e792d7ba04ad