[INFO] fetching crate rp-cli 0.0.4...
[INFO] checking rp-cli-0.0.4 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate rp-cli 0.0.4 into /workspace/builds/worker-0-tc2/source
[INFO] started tweaking crates.io crate rp-cli 0.0.4
[INFO] finished tweaking crates.io crate rp-cli 0.0.4
[INFO] tweaked toml for crates.io crate rp-cli 0.0.4 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate rp-cli 0.0.4 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 rp-cli 0.0.4 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-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] b8a04b7f516bdab473a32f0680a8349a52201d5c20839b5ba57c933228b2844c
[INFO] running `Command { std: "docker" "start" "-a" "b8a04b7f516bdab473a32f0680a8349a52201d5c20839b5ba57c933228b2844c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b8a04b7f516bdab473a32f0680a8349a52201d5c20839b5ba57c933228b2844c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b8a04b7f516bdab473a32f0680a8349a52201d5c20839b5ba57c933228b2844c", kill_on_drop: false }`
[INFO] [stdout] b8a04b7f516bdab473a32f0680a8349a52201d5c20839b5ba57c933228b2844c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] a87965479d33c022a5d321d0fbbdadf8606cf486cdfb230b053fc6ed8356fc98
[INFO] running `Command { std: "docker" "start" "-a" "a87965479d33c022a5d321d0fbbdadf8606cf486cdfb230b053fc6ed8356fc98", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.117
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[INFO] [stderr]     Checking rp-cli v0.0.4 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `Deserialize`
[INFO] [stdout]  --> src/api.rs:2:35
[INFO] [stdout]   |
[INFO] [stdout] 2 | use serde::{de::DeserializeOwned, Deserialize, Serialize};
[INFO] [stdout]   |                                   ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Deserialize`
[INFO] [stdout]  --> src/api.rs:2:35
[INFO] [stdout]   |
[INFO] [stdout] 2 | use serde::{de::DeserializeOwned, Deserialize, Serialize};
[INFO] [stdout]   |                                   ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `compile`
[INFO] [stdout]  --> src/handler.rs:2:24
[INFO] [stdout]   |
[INFO] [stdout] 2 | use crate::api_types::{compile, download, execute, fmt, share};
[INFO] [stdout]   |                        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ParseError`
[INFO] [stdout]  --> src/handler.rs:6:11
[INFO] [stdout]   |
[INFO] [stdout] 6 | use url::{ParseError, Url};
[INFO] [stdout]   |           ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `compile`
[INFO] [stdout]  --> src/printer.rs:1:24
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::api_types::{compile, download, execute, fmt, share};
[INFO] [stdout]   |                        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `compile`
[INFO] [stdout]  --> src/handler.rs:2:24
[INFO] [stdout]   |
[INFO] [stdout] 2 | use crate::api_types::{compile, download, execute, fmt, share};
[INFO] [stdout]   |                        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ParseError`
[INFO] [stdout]  --> src/handler.rs:6:11
[INFO] [stdout]   |
[INFO] [stdout] 6 | use url::{ParseError, Url};
[INFO] [stdout]   |           ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `compile`
[INFO] [stdout]  --> src/printer.rs:1:24
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::api_types::{compile, download, execute, fmt, share};
[INFO] [stdout]   |                        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/handler.rs:98:58
[INFO] [stdout]    |
[INFO] [stdout] 98 | fn pick_id_from(id_or_url: String) -> Result<String, Box<std::error::Error>> {
[INFO] [stdout]    |                                                          ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 98 | fn pick_id_from(id_or_url: String) -> Result<String, Box<dyn std::error::Error>> {
[INFO] [stdout]    |                                                          +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/input.rs:25:72
[INFO] [stdout]    |
[INFO] [stdout] 25 | pub fn code_from_path(file_path: &path::PathBuf) -> Result<String, Box<std::error::Error>> {
[INFO] [stdout]    |                                                                        ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 25 | pub fn code_from_path(file_path: &path::PathBuf) -> Result<String, Box<dyn std::error::Error>> {
[INFO] [stdout]    |                                                                        +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/handler.rs:98:58
[INFO] [stdout]    |
[INFO] [stdout] 98 | fn pick_id_from(id_or_url: String) -> Result<String, Box<std::error::Error>> {
[INFO] [stdout]    |                                                          ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 98 | fn pick_id_from(id_or_url: String) -> Result<String, Box<dyn std::error::Error>> {
[INFO] [stdout]    |                                                          +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/input.rs:25:72
[INFO] [stdout]    |
[INFO] [stdout] 25 | pub fn code_from_path(file_path: &path::PathBuf) -> Result<String, Box<std::error::Error>> {
[INFO] [stdout]    |                                                                        ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 25 | pub fn code_from_path(file_path: &path::PathBuf) -> Result<String, Box<dyn std::error::Error>> {
[INFO] [stdout]    |                                                                        +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/printer.rs:33:13
[INFO] [stdout]    |
[INFO] [stdout] 33 |         let mut writer = io::BufWriter::new(stdout);
[INFO] [stdout]    |             ----^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `FORMAT_TITLE` is never used
[INFO] [stdout]   --> src/printer.rs:17:7
[INFO] [stdout]    |
[INFO] [stdout] 17 | const FORMAT_TITLE: &str = "Format";
[INFO] [stdout]    |       ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `print_new_line` is never used
[INFO] [stdout]    --> src/printer.rs:139:8
[INFO] [stdout]     |
[INFO] [stdout]  30 | impl Printer {
[INFO] [stdout]     | ------------ method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 139 |     fn print_new_line(&mut self) -> Result<(), Box<dyn std::error::Error>> {
[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/clap_rp.rs:61:5
[INFO] [stdout]    |
[INFO] [stdout] 61 | /     #[clap(long = "mode", default_value = "debug", required = false)]
[INFO] [stdout] 62 | |     mode: 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/clap_rp.rs:64:5
[INFO] [stdout]    |
[INFO] [stdout] 64 | /     #[clap(long = "channel", default_value = "stable", required = false)]
[INFO] [stdout] 65 | |     channel: 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/clap_rp.rs:67:5
[INFO] [stdout]    |
[INFO] [stdout] 67 | /     #[clap(long = "edition", default_value = "2021", required = false)]
[INFO] [stdout] 68 | |     edition: 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/clap_rp.rs:91:5
[INFO] [stdout]    |
[INFO] [stdout] 91 | /     #[clap(long = "edition", default_value = "2021", required = false)]
[INFO] [stdout] 92 | |     edition: 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/clap_rp.rs:123:5
[INFO] [stdout]     |
[INFO] [stdout] 123 | /     #[clap(required = true)]
[INFO] [stdout] 124 | |     id_or_url: String,
[INFO] [stdout]     | |_____________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/printer.rs:140:9
[INFO] [stdout]     |
[INFO] [stdout] 140 |         writeln!(self.writer, "");
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 140 |         let _ = writeln!(self.writer, "");
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rp-cli` (lib) due to 5 previous errors; 10 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/printer.rs:33:13
[INFO] [stdout]    |
[INFO] [stdout] 33 |         let mut writer = io::BufWriter::new(stdout);
[INFO] [stdout]    |             ----^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `FORMAT_TITLE` is never used
[INFO] [stdout]   --> src/printer.rs:17:7
[INFO] [stdout]    |
[INFO] [stdout] 17 | const FORMAT_TITLE: &str = "Format";
[INFO] [stdout]    |       ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `print_new_line` is never used
[INFO] [stdout]    --> src/printer.rs:139:8
[INFO] [stdout]     |
[INFO] [stdout]  30 | impl Printer {
[INFO] [stdout]     | ------------ method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 139 |     fn print_new_line(&mut self) -> Result<(), Box<dyn std::error::Error>> {
[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/clap_rp.rs:61:5
[INFO] [stdout]    |
[INFO] [stdout] 61 | /     #[clap(long = "mode", default_value = "debug", required = false)]
[INFO] [stdout] 62 | |     mode: 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/clap_rp.rs:64:5
[INFO] [stdout]    |
[INFO] [stdout] 64 | /     #[clap(long = "channel", default_value = "stable", required = false)]
[INFO] [stdout] 65 | |     channel: 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/clap_rp.rs:67:5
[INFO] [stdout]    |
[INFO] [stdout] 67 | /     #[clap(long = "edition", default_value = "2021", required = false)]
[INFO] [stdout] 68 | |     edition: 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/clap_rp.rs:91:5
[INFO] [stdout]    |
[INFO] [stdout] 91 | /     #[clap(long = "edition", default_value = "2021", required = false)]
[INFO] [stdout] 92 | |     edition: 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/clap_rp.rs:123:5
[INFO] [stdout]     |
[INFO] [stdout] 123 | /     #[clap(required = true)]
[INFO] [stdout] 124 | |     id_or_url: String,
[INFO] [stdout]     | |_____________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/printer.rs:140:9
[INFO] [stdout]     |
[INFO] [stdout] 140 |         writeln!(self.writer, "");
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 140 |         let _ = writeln!(self.writer, "");
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rp-cli` (lib test) due to 5 previous errors; 10 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "a87965479d33c022a5d321d0fbbdadf8606cf486cdfb230b053fc6ed8356fc98", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a87965479d33c022a5d321d0fbbdadf8606cf486cdfb230b053fc6ed8356fc98", kill_on_drop: false }`
[INFO] [stdout] a87965479d33c022a5d321d0fbbdadf8606cf486cdfb230b053fc6ed8356fc98
