[INFO] fetching crate rargs 0.3.0...
[INFO] checking rargs-0.3.0 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate rargs 0.3.0 into /workspace/builds/worker-1-tc2/source
[INFO] started tweaking crates.io crate rargs 0.3.0
[INFO] finished tweaking crates.io crate rargs 0.3.0
[INFO] tweaked toml for crates.io crate rargs 0.3.0 written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate rargs 0.3.0 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 rargs 0.3.0 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] 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] 381d41c8140c89176dbc1528fc1ae2449f42cbc18c6235754883292da2f7c335
[INFO] running `Command { std: "docker" "start" "-a" "381d41c8140c89176dbc1528fc1ae2449f42cbc18c6235754883292da2f7c335", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "381d41c8140c89176dbc1528fc1ae2449f42cbc18c6235754883292da2f7c335", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "381d41c8140c89176dbc1528fc1ae2449f42cbc18c6235754883292da2f7c335", kill_on_drop: false }`
[INFO] [stdout] 381d41c8140c89176dbc1528fc1ae2449f42cbc18c6235754883292da2f7c335
[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] eb6500f455b096ae7d20c1e9c78333ffe3fe0aeb3e460a9d854f80b973bbb56a
[INFO] running `Command { std: "docker" "start" "-a" "eb6500f455b096ae7d20c1e9c78333ffe3fe0aeb3e460a9d854f80b973bbb56a", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.12
[INFO] [stderr]    Compiling syn v1.0.18
[INFO] [stderr]    Compiling cc v1.0.9
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.2
[INFO] [stderr]    Compiling proc-macro-error v1.0.2
[INFO] [stderr]    Compiling unicode-segmentation v1.6.0
[INFO] [stderr]     Checking unicode-width v0.1.4
[INFO] [stderr]     Checking atty v0.2.8
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking vec_map v0.8.0
[INFO] [stderr]     Checking bitflags v1.0.1
[INFO] [stderr]     Checking cfg-if v0.1.2
[INFO] [stderr]     Checking rustc-demangle v0.1.7
[INFO] [stderr]     Checking aho-corasick v0.7.10
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking thread_local v1.0.1
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]     Checking regex-syntax v0.6.17
[INFO] [stderr]    Compiling heck v0.3.1
[INFO] [stderr]     Checking dtoa v0.4.2
[INFO] [stderr]     Checking itoa v0.4.1
[INFO] [stderr]     Checking serde v1.0.37
[INFO] [stderr]     Checking num-traits v0.2.2
[INFO] [stderr]     Checking colored v1.6.0
[INFO] [stderr]     Checking threadpool v1.8.0
[INFO] [stderr]     Checking environment v0.1.1
[INFO] [stderr]    Compiling quote v1.0.4
[INFO] [stderr]    Compiling backtrace-sys v0.1.16
[INFO] [stderr]     Checking regex v1.3.7
[INFO] [stderr]     Checking serde_json v1.0.13
[INFO] [stderr]    Compiling syn-mid v0.5.0
[INFO] [stderr]    Compiling synstructure v0.12.3
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]    Compiling structopt-derive v0.4.7
[INFO] [stderr]     Checking backtrace v0.3.5
[INFO] [stderr]     Checking failure v0.1.8
[INFO] [stderr]     Checking assert_cli v0.6.3
[INFO] [stderr]     Checking structopt v0.3.14
[INFO] [stderr]     Checking rargs v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]    --> src/main.rs:118:5
[INFO] [stdout]     |
[INFO] [stdout] 118 | /     #[structopt(
[INFO] [stdout] 119 | |         long = "pattern",
[INFO] [stdout] 120 | |         short = "p",
[INFO] [stdout] 121 | |         help = "regex pattern that captures the input"
[INFO] [stdout] 122 | |     )]
[INFO] [stdout] 123 | |     pattern: 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<String, Infallible>
[INFO] [stdout]    --> src/main.rs:125:5
[INFO] [stdout]     |
[INFO] [stdout] 125 | /     #[structopt(
[INFO] [stdout] 126 | |         long = "separator",
[INFO] [stdout] 127 | |         short = "s",
[INFO] [stdout] 128 | |         default_value = " ",
[INFO] [stdout] 129 | |         help = "separator for ranged fields"
[INFO] [stdout] 130 | |     )]
[INFO] [stdout] 131 | |     separator: String,
[INFO] [stdout]     | |_____________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]    --> src/main.rs:141:5
[INFO] [stdout]     |
[INFO] [stdout] 141 | /     #[structopt(
[INFO] [stdout] 142 | |         long = "delimiter",
[INFO] [stdout] 143 | |         short = "d",
[INFO] [stdout] 144 | |         conflicts_with = "pattern",
[INFO] [stdout] 145 | |         help = "regex pattern used as delimiter (conflict with pattern)"
[INFO] [stdout] 146 | |     )]
[INFO] [stdout] 147 | |     delimiter: Option<String>,
[INFO] [stdout]     | |_____________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]    --> src/main.rs:156:5
[INFO] [stdout]     |
[INFO] [stdout] 156 | /     #[structopt(required = true, help = "command to execute and its arguments")]
[INFO] [stdout] 157 | |     cmd_and_args: Vec<String>,
[INFO] [stdout]     | |_____________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rargs` (bin "rargs") due to 4 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<String, Infallible>
[INFO] [stdout]    --> src/main.rs:118:5
[INFO] [stdout]     |
[INFO] [stdout] 118 | /     #[structopt(
[INFO] [stdout] 119 | |         long = "pattern",
[INFO] [stdout] 120 | |         short = "p",
[INFO] [stdout] 121 | |         help = "regex pattern that captures the input"
[INFO] [stdout] 122 | |     )]
[INFO] [stdout] 123 | |     pattern: 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<String, Infallible>
[INFO] [stdout]    --> src/main.rs:125:5
[INFO] [stdout]     |
[INFO] [stdout] 125 | /     #[structopt(
[INFO] [stdout] 126 | |         long = "separator",
[INFO] [stdout] 127 | |         short = "s",
[INFO] [stdout] 128 | |         default_value = " ",
[INFO] [stdout] 129 | |         help = "separator for ranged fields"
[INFO] [stdout] 130 | |     )]
[INFO] [stdout] 131 | |     separator: String,
[INFO] [stdout]     | |_____________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]    --> src/main.rs:141:5
[INFO] [stdout]     |
[INFO] [stdout] 141 | /     #[structopt(
[INFO] [stdout] 142 | |         long = "delimiter",
[INFO] [stdout] 143 | |         short = "d",
[INFO] [stdout] 144 | |         conflicts_with = "pattern",
[INFO] [stdout] 145 | |         help = "regex pattern used as delimiter (conflict with pattern)"
[INFO] [stdout] 146 | |     )]
[INFO] [stdout] 147 | |     delimiter: Option<String>,
[INFO] [stdout]     | |_____________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]    --> src/main.rs:156:5
[INFO] [stdout]     |
[INFO] [stdout] 156 | /     #[structopt(required = true, help = "command to execute and its arguments")]
[INFO] [stdout] 157 | |     cmd_and_args: Vec<String>,
[INFO] [stdout]     | |_____________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rargs` (bin "rargs" test) due to 4 previous errors
[INFO] running `Command { std: "docker" "inspect" "eb6500f455b096ae7d20c1e9c78333ffe3fe0aeb3e460a9d854f80b973bbb56a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "eb6500f455b096ae7d20c1e9c78333ffe3fe0aeb3e460a9d854f80b973bbb56a", kill_on_drop: false }`
[INFO] [stdout] eb6500f455b096ae7d20c1e9c78333ffe3fe0aeb3e460a9d854f80b973bbb56a
