[INFO] fetching crate cbdr 0.2.4...
[INFO] checking cbdr-0.2.4 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate cbdr 0.2.4 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate cbdr 0.2.4
[INFO] finished tweaking crates.io crate cbdr 0.2.4
[INFO] tweaked toml for crates.io crate cbdr 0.2.4 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate cbdr 0.2.4 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 cbdr 0.2.4 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-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 3405e74e3828b5181f2d7ce85f25ba41bf6d10ac69392095e5dc231d48686bd8
[INFO] running `Command { std: "docker" "start" "-a" "3405e74e3828b5181f2d7ce85f25ba41bf6d10ac69392095e5dc231d48686bd8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3405e74e3828b5181f2d7ce85f25ba41bf6d10ac69392095e5dc231d48686bd8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3405e74e3828b5181f2d7ce85f25ba41bf6d10ac69392095e5dc231d48686bd8", kill_on_drop: false }`
[INFO] [stdout] 3405e74e3828b5181f2d7ce85f25ba41bf6d10ac69392095e5dc231d48686bd8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 9a1552e327d1a998b8be4f75e578a2eb005ce33f8254d820c80c497497de12a0
[INFO] running `Command { std: "docker" "start" "-a" "9a1552e327d1a998b8be4f75e578a2eb005ce33f8254d820c80c497497de12a0", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.108
[INFO] [stderr]    Compiling proc-macro2 v1.0.32
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling signal-hook v0.3.10
[INFO] [stderr]    Compiling syn v1.0.82
[INFO] [stderr]     Checking unicode-width v0.1.9
[INFO] [stderr]    Compiling ryu v1.0.6
[INFO] [stderr]     Checking regex-syntax v0.6.25
[INFO] [stderr]     Checking arrayvec v0.5.2
[INFO] [stderr]     Checking aho-corasick v0.7.18
[INFO] [stderr]     Checking utf8parse v0.2.0
[INFO] [stderr]    Compiling anyhow v1.0.50
[INFO] [stderr]     Checking ppv-lite86 v0.2.15
[INFO] [stderr]    Compiling serde_json v1.0.72
[INFO] [stderr]     Checking bstr v0.2.17
[INFO] [stderr]     Checking csv-core v0.1.10
[INFO] [stderr]     Checking arc-swap v1.5.0
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking signal-hook-registry v1.4.0
[INFO] [stderr]     Checking parking_lot_core v0.8.5
[INFO] [stderr]     Checking mio v0.7.14
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking getrandom v0.2.3
[INFO] [stderr]     Checking special v0.8.1
[INFO] [stderr]     Checking time-cmd v0.1.0
[INFO] [stderr]     Checking behrens-fisher v0.2.0
[INFO] [stderr]     Checking regex v1.5.4
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking parking_lot v0.11.2
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]    Compiling quote v1.0.10
[INFO] [stderr]     Checking csv v1.1.6
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.4
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling vte_generate_state_changes v0.1.1
[INFO] [stderr]     Checking signal-hook-mio v0.2.1
[INFO] [stderr]     Checking crossterm v0.20.0
[INFO] [stderr]     Checking crossterm v0.22.1
[INFO] [stderr]     Checking vte v0.10.1
[INFO] [stderr]     Checking env_logger v0.9.0
[INFO] [stderr]     Checking tabwriter v1.2.1
[INFO] [stderr]     Checking liveterm v0.3.0
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling structopt-derive v0.4.18
[INFO] [stderr]     Checking structopt v0.3.25
[INFO] [stderr]     Checking cbdr v0.2.4 (/opt/rustwide/workdir)
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/analyze.rs:21:5
[INFO] [stdout]    |
[INFO] [stdout] 21 | /     /// A "base" label.  If specified, all labels will be compared to this.
[INFO] [stdout] 22 | |     #[structopt(long)]
[INFO] [stdout] 23 | |     pub base: 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] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/analyze.rs:24:5
[INFO] [stdout]    |
[INFO] [stdout] 24 | /     /// Benchs to compare.  If "base" is not specified, they'll be compared
[INFO] [stdout] 25 | |     /// consecutively.
[INFO] [stdout] 26 | |     pub labels: Vec<String>,
[INFO] [stdout]    | |___________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/sample.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | /     /// A benchmark script to use.  Labels will be passed as $1
[INFO] [stdout] 16 | |     #[structopt(long, short)]
[INFO] [stdout] 17 | |     pub bench: Option<String>,
[INFO] [stdout]    | |_____________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<NamedString, Infallible>
[INFO] [stdout]   --> src/sample.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 18 | /     /// These benchmarks will be run in a shell and their output will be used to compute stats
[INFO] [stdout] 19 | |     #[structopt(long, short)]
[INFO] [stdout] 20 | |     pub scripts: Vec<NamedString>,
[INFO] [stdout]    | |_________________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<NamedString, Infallible>
[INFO] [stdout]   --> src/sample.rs:21:5
[INFO] [stdout]    |
[INFO] [stdout] 21 | /     /// If a script is given as --bench, these will be passed to it as $1;
[INFO] [stdout] 22 | |     /// if not, these will be treated like --script arguments.
[INFO] [stdout] 23 | |     pub targets: Vec<NamedString>,
[INFO] [stdout]    | |_________________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/sample.rs:28:5
[INFO] [stdout]    |
[INFO] [stdout] 28 | /     /// A target labeled "before".  "--before=foo" is equivalent to "before:foo".
[INFO] [stdout] 29 | |     #[structopt(long)]
[INFO] [stdout] 30 | |     pub before: Option<String>,
[INFO] [stdout]    | |______________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/sample.rs:31:5
[INFO] [stdout]    |
[INFO] [stdout] 31 | /     /// A target labeled "after".  "--after=foo" is equivalent to "after:foo".
[INFO] [stdout] 32 | |     #[structopt(long)]
[INFO] [stdout] 33 | |     pub after: Option<String>,
[INFO] [stdout]    | |_____________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<NamedString, Infallible>
[INFO] [stdout]   --> src/sample.rs:40:61
[INFO] [stdout]    |
[INFO] [stdout] 40 |       fn from_str(x: &str) -> Result<NamedString, Infallible> {
[INFO] [stdout]    |  _____________________________________________________________^
[INFO] [stdout] 41 | |         let xs = x.splitn(2, ':').collect::<Vec<_>>();
[INFO] [stdout] 42 | |         match &xs[..] {
[INFO] [stdout] 43 | |             [x] => Ok(NamedString(None, x.to_string())),
[INFO] [stdout] ...  |
[INFO] [stdout] 47 | |     }
[INFO] [stdout]    | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<NamedString, Infallible>
[INFO] [stdout]   --> src/sample.rs:42:9
[INFO] [stdout]    |
[INFO] [stdout] 42 | /         match &xs[..] {
[INFO] [stdout] 43 | |             [x] => Ok(NamedString(None, x.to_string())),
[INFO] [stdout] 44 | |             [name, x] => Ok(NamedString(Some(name.to_string()), x.to_string())),
[INFO] [stdout] 45 | |             _ => unreachable!(),
[INFO] [stdout] 46 | |         }
[INFO] [stdout]    | |_________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<NamedString, Infallible>
[INFO] [stdout]   --> src/sample.rs:43:20
[INFO] [stdout]    |
[INFO] [stdout] 43 |             [x] => Ok(NamedString(None, x.to_string())),
[INFO] [stdout]    |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<NamedString, Infallible>
[INFO] [stdout]   --> src/sample.rs:44:26
[INFO] [stdout]    |
[INFO] [stdout] 44 |             [name, x] => Ok(NamedString(Some(name.to_string()), x.to_string())),
[INFO] [stdout]    |                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `cbdr` (bin "cbdr" test) due to 11 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/analyze.rs:21:5
[INFO] [stdout]    |
[INFO] [stdout] 21 | /     /// A "base" label.  If specified, all labels will be compared to this.
[INFO] [stdout] 22 | |     #[structopt(long)]
[INFO] [stdout] 23 | |     pub base: 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] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/analyze.rs:24:5
[INFO] [stdout]    |
[INFO] [stdout] 24 | /     /// Benchs to compare.  If "base" is not specified, they'll be compared
[INFO] [stdout] 25 | |     /// consecutively.
[INFO] [stdout] 26 | |     pub labels: Vec<String>,
[INFO] [stdout]    | |___________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/sample.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | /     /// A benchmark script to use.  Labels will be passed as $1
[INFO] [stdout] 16 | |     #[structopt(long, short)]
[INFO] [stdout] 17 | |     pub bench: Option<String>,
[INFO] [stdout]    | |_____________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<NamedString, Infallible>
[INFO] [stdout]   --> src/sample.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 18 | /     /// These benchmarks will be run in a shell and their output will be used to compute stats
[INFO] [stdout] 19 | |     #[structopt(long, short)]
[INFO] [stdout] 20 | |     pub scripts: Vec<NamedString>,
[INFO] [stdout]    | |_________________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<NamedString, Infallible>
[INFO] [stdout]   --> src/sample.rs:21:5
[INFO] [stdout]    |
[INFO] [stdout] 21 | /     /// If a script is given as --bench, these will be passed to it as $1;
[INFO] [stdout] 22 | |     /// if not, these will be treated like --script arguments.
[INFO] [stdout] 23 | |     pub targets: Vec<NamedString>,
[INFO] [stdout]    | |_________________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/sample.rs:28:5
[INFO] [stdout]    |
[INFO] [stdout] 28 | /     /// A target labeled "before".  "--before=foo" is equivalent to "before:foo".
[INFO] [stdout] 29 | |     #[structopt(long)]
[INFO] [stdout] 30 | |     pub before: Option<String>,
[INFO] [stdout]    | |______________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/sample.rs:31:5
[INFO] [stdout]    |
[INFO] [stdout] 31 | /     /// A target labeled "after".  "--after=foo" is equivalent to "after:foo".
[INFO] [stdout] 32 | |     #[structopt(long)]
[INFO] [stdout] 33 | |     pub after: Option<String>,
[INFO] [stdout]    | |_____________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<NamedString, Infallible>
[INFO] [stdout]   --> src/sample.rs:40:61
[INFO] [stdout]    |
[INFO] [stdout] 40 |       fn from_str(x: &str) -> Result<NamedString, Infallible> {
[INFO] [stdout]    |  _____________________________________________________________^
[INFO] [stdout] 41 | |         let xs = x.splitn(2, ':').collect::<Vec<_>>();
[INFO] [stdout] 42 | |         match &xs[..] {
[INFO] [stdout] 43 | |             [x] => Ok(NamedString(None, x.to_string())),
[INFO] [stdout] ...  |
[INFO] [stdout] 47 | |     }
[INFO] [stdout]    | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<NamedString, Infallible>
[INFO] [stdout]   --> src/sample.rs:42:9
[INFO] [stdout]    |
[INFO] [stdout] 42 | /         match &xs[..] {
[INFO] [stdout] 43 | |             [x] => Ok(NamedString(None, x.to_string())),
[INFO] [stdout] 44 | |             [name, x] => Ok(NamedString(Some(name.to_string()), x.to_string())),
[INFO] [stdout] 45 | |             _ => unreachable!(),
[INFO] [stdout] 46 | |         }
[INFO] [stdout]    | |_________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<NamedString, Infallible>
[INFO] [stdout]   --> src/sample.rs:43:20
[INFO] [stdout]    |
[INFO] [stdout] 43 |             [x] => Ok(NamedString(None, x.to_string())),
[INFO] [stdout]    |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<NamedString, Infallible>
[INFO] [stdout]   --> src/sample.rs:44:26
[INFO] [stdout]    |
[INFO] [stdout] 44 |             [name, x] => Ok(NamedString(Some(name.to_string()), x.to_string())),
[INFO] [stdout]    |                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `cbdr` (bin "cbdr") due to 11 previous errors
[INFO] running `Command { std: "docker" "inspect" "9a1552e327d1a998b8be4f75e578a2eb005ce33f8254d820c80c497497de12a0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9a1552e327d1a998b8be4f75e578a2eb005ce33f8254d820c80c497497de12a0", kill_on_drop: false }`
[INFO] [stdout] 9a1552e327d1a998b8be4f75e578a2eb005ce33f8254d820c80c497497de12a0
