[INFO] fetching crate dmidecode-rs 0.2.2...
[INFO] checking dmidecode-rs-0.2.2 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate dmidecode-rs 0.2.2 into /workspace/builds/worker-1-tc2/source
[INFO] removed /workspace/builds/worker-1-tc2/source/.cargo/config.toml
[INFO] started tweaking crates.io crate dmidecode-rs 0.2.2
[INFO] finished tweaking crates.io crate dmidecode-rs 0.2.2
[INFO] tweaked toml for crates.io crate dmidecode-rs 0.2.2 written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate dmidecode-rs 0.2.2 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 dmidecode-rs 0.2.2 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] e123c2cf4004ca0505b938635e3b575f08ad75ddb7fa9b3f8a9bdfa614aa53c9
[INFO] running `Command { std: "docker" "start" "-a" "e123c2cf4004ca0505b938635e3b575f08ad75ddb7fa9b3f8a9bdfa614aa53c9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e123c2cf4004ca0505b938635e3b575f08ad75ddb7fa9b3f8a9bdfa614aa53c9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e123c2cf4004ca0505b938635e3b575f08ad75ddb7fa9b3f8a9bdfa614aa53c9", kill_on_drop: false }`
[INFO] [stdout] e123c2cf4004ca0505b938635e3b575f08ad75ddb7fa9b3f8a9bdfa614aa53c9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] 38643e9e6b04fb66a726b45bd131ab8797c99506667523cb11b432b2e5d484b8
[INFO] running `Command { std: "docker" "start" "-a" "38643e9e6b04fb66a726b45bd131ab8797c99506667523cb11b432b2e5d484b8", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.93
[INFO] [stderr]    Compiling syn v1.0.69
[INFO] [stderr]    Compiling version_check v0.9.3
[INFO] [stderr]    Compiling serde_derive v1.0.126
[INFO] [stderr]     Checking unicode-width v0.1.8
[INFO] [stderr]    Compiling getrandom v0.2.2
[INFO] [stderr]    Compiling serde v1.0.126
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]     Checking memchr v2.6.3
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling serde_json v1.0.64
[INFO] [stderr]    Compiling unicode-segmentation v1.7.1
[INFO] [stderr]    Compiling syn v2.0.37
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]     Checking predicates-core v1.0.6
[INFO] [stderr]     Checking ppv-lite86 v0.2.10
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]    Compiling doc-comment v0.3.3
[INFO] [stderr]     Checking itoa v0.4.7
[INFO] [stderr]     Checking regex-syntax v0.6.23
[INFO] [stderr]     Checking getopts v0.2.21
[INFO] [stderr]     Checking regex-automata v0.3.8
[INFO] [stderr]     Checking treeline v0.1.0
[INFO] [stderr]     Checking remove_dir_all v0.5.3
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]     Checking aho-corasick v0.7.15
[INFO] [stderr]     Checking predicates-tree v1.0.2
[INFO] [stderr]    Compiling heck v0.3.2
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking wait-timeout v0.2.0
[INFO] [stderr]     Checking float-cmp v0.9.0
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking rand_core v0.6.2
[INFO] [stderr]     Checking bstr v1.6.2
[INFO] [stderr]     Checking rand_chacha v0.3.0
[INFO] [stderr]     Checking rand v0.8.3
[INFO] [stderr]     Checking tempfile v3.2.0
[INFO] [stderr]     Checking regex v1.4.5
[INFO] [stderr]     Checking predicates v3.0.4
[INFO] [stderr]    Compiling structopt-derive v0.4.14
[INFO] [stderr]    Compiling enum-iterator-derive v1.2.1
[INFO] [stderr]     Checking assert_cmd v2.0.12
[INFO] [stderr]     Checking enum-iterator v1.4.1
[INFO] [stderr]     Checking structopt v0.3.21
[INFO] [stderr]     Checking smbios-lib v0.9.1
[INFO] [stderr]     Checking dmidecode-rs v0.2.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: fields `quiet` and `dev_mem` are never read
[INFO] [stdout]   --> src/dmiopt.rs:23:9
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub struct Opt {
[INFO] [stdout]    |            --- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 23 |     pub quiet: bool,
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 27 |     pub dev_mem: Option<PathBuf>,
[INFO] [stdout]    |         ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Opt` 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] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]    --> src/dmiopt.rs:96:5
[INFO] [stdout]     |
[INFO] [stdout]  96 | /     /// Only display the value of the OEM string number N. The first OEM string
[INFO] [stdout]  97 | |     /// has number 1. With special value "count", return the number of OEM
[INFO] [stdout]  98 | |     /// strings instead.
[INFO] [stdout]  99 | |     #[structopt(long = "oem-string")]
[INFO] [stdout] 100 | |     pub oem_string: Option<String>,
[INFO] [stdout]     | |__________________________________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `quiet` and `dev_mem` are never read
[INFO] [stdout]   --> src/dmiopt.rs:23:9
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub struct Opt {
[INFO] [stdout]    |            --- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 23 |     pub quiet: bool,
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 27 |     pub dev_mem: Option<PathBuf>,
[INFO] [stdout]    |         ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Opt` 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] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]    --> src/dmiopt.rs:96:5
[INFO] [stdout]     |
[INFO] [stdout]  96 | /     /// Only display the value of the OEM string number N. The first OEM string
[INFO] [stdout]  97 | |     /// has number 1. With special value "count", return the number of OEM
[INFO] [stdout]  98 | |     /// strings instead.
[INFO] [stdout]  99 | |     #[structopt(long = "oem-string")]
[INFO] [stdout] 100 | |     pub oem_string: Option<String>,
[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 `dmidecode-rs` (bin "dmidecode") due to 1 previous error; 1 warning emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `dmidecode-rs` (bin "dmidecode" test) due to 1 previous error; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "38643e9e6b04fb66a726b45bd131ab8797c99506667523cb11b432b2e5d484b8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "38643e9e6b04fb66a726b45bd131ab8797c99506667523cb11b432b2e5d484b8", kill_on_drop: false }`
[INFO] [stdout] 38643e9e6b04fb66a726b45bd131ab8797c99506667523cb11b432b2e5d484b8
