[INFO] fetching crate rmw_str 0.0.7...
[INFO] checking rmw_str-0.0.7 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate rmw_str 0.0.7 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate rmw_str 0.0.7
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate rmw_str 0.0.7
[INFO] tweaked toml for crates.io crate rmw_str 0.0.7 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate rmw_str 0.0.7 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 rmw_str 0.0.7 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] 1565fd93aa3e7482261dfcb53da7db07c23e482c303310014648c39529d3c97f
[INFO] running `Command { std: "docker" "start" "-a" "1565fd93aa3e7482261dfcb53da7db07c23e482c303310014648c39529d3c97f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1565fd93aa3e7482261dfcb53da7db07c23e482c303310014648c39529d3c97f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1565fd93aa3e7482261dfcb53da7db07c23e482c303310014648c39529d3c97f", kill_on_drop: false }`
[INFO] [stdout] 1565fd93aa3e7482261dfcb53da7db07c23e482c303310014648c39529d3c97f
[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] ed764748476d2587bb33aee0f1dc0a4e5b117ba5fb1714047a0c2a46ca117574
[INFO] running `Command { std: "docker" "start" "-a" "ed764748476d2587bb33aee0f1dc0a4e5b117ba5fb1714047a0c2a46ca117574", kill_on_drop: false }`
[INFO] [stderr]    Compiling anyhow v1.0.55
[INFO] [stderr]     Checking rmw_str v0.0.7 (/opt/rustwide/workdir)
[INFO] [stdout] warning: irrefutable `if let` pattern
[INFO] [stdout]   --> src/lib.rs:69:16
[INFO] [stdout]    |
[INFO] [stdout] 69 |             if let Ok(i) = i.parse() {
[INFO] [stdout]    |                ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 93 | ImplStr!(String);
[INFO] [stdout]    | ---------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this pattern will always match, so the `if let` is useless
[INFO] [stdout]    = help: consider replacing the `if let` with a `let`
[INFO] [stdout]    = note: `#[warn(irrefutable_let_patterns)]` on by default
[INFO] [stdout]    = note: this warning originates in the macro `ImplStr` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: ControlFlow<Result<Infallible, Infallible>, String>
[INFO] [stdout]   --> src/lib.rs:46:11
[INFO] [stdout]    |
[INFO] [stdout] 46 | /           String::from_utf8_lossy(val)
[INFO] [stdout] 47 | |             .lines()
[INFO] [stdout] 48 | |             .next()
[INFO] [stdout] 49 | |             .unwrap_or("")
[INFO] [stdout] 50 | |             .trim()
[INFO] [stdout] 51 | |             .parse()?,
[INFO] [stdout]    | |_____________________^
[INFO] [stdout] ...
[INFO] [stdout] 93 |   ImplStr!(String);
[INFO] [stdout]    |   ---------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout]    = note: this error originates in the macro `ImplStr` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/lib.rs:46:11
[INFO] [stdout]    |
[INFO] [stdout] 46 | /           String::from_utf8_lossy(val)
[INFO] [stdout] 47 | |             .lines()
[INFO] [stdout] 48 | |             .next()
[INFO] [stdout] 49 | |             .unwrap_or("")
[INFO] [stdout] 50 | |             .trim()
[INFO] [stdout] 51 | |             .parse()?,
[INFO] [stdout]    | |____________________^
[INFO] [stdout] ...
[INFO] [stdout] 93 |   ImplStr!(String);
[INFO] [stdout]    |   ---------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in the macro `ImplStr` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/lib.rs:69:28
[INFO] [stdout]    |
[INFO] [stdout] 69 |             if let Ok(i) = i.parse() {
[INFO] [stdout]    |                            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 93 | ImplStr!(String);
[INFO] [stdout]    | ---------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in the macro `ImplStr` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rmw_str` (lib test) due to 3 previous errors; 1 warning emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: irrefutable `if let` pattern
[INFO] [stdout]   --> src/lib.rs:69:16
[INFO] [stdout]    |
[INFO] [stdout] 69 |             if let Ok(i) = i.parse() {
[INFO] [stdout]    |                ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 93 | ImplStr!(String);
[INFO] [stdout]    | ---------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this pattern will always match, so the `if let` is useless
[INFO] [stdout]    = help: consider replacing the `if let` with a `let`
[INFO] [stdout]    = note: `#[warn(irrefutable_let_patterns)]` on by default
[INFO] [stdout]    = note: this warning originates in the macro `ImplStr` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: ControlFlow<Result<Infallible, Infallible>, String>
[INFO] [stdout]   --> src/lib.rs:46:11
[INFO] [stdout]    |
[INFO] [stdout] 46 | /           String::from_utf8_lossy(val)
[INFO] [stdout] 47 | |             .lines()
[INFO] [stdout] 48 | |             .next()
[INFO] [stdout] 49 | |             .unwrap_or("")
[INFO] [stdout] 50 | |             .trim()
[INFO] [stdout] 51 | |             .parse()?,
[INFO] [stdout]    | |_____________________^
[INFO] [stdout] ...
[INFO] [stdout] 93 |   ImplStr!(String);
[INFO] [stdout]    |   ---------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout]    = note: this error originates in the macro `ImplStr` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/lib.rs:46:11
[INFO] [stdout]    |
[INFO] [stdout] 46 | /           String::from_utf8_lossy(val)
[INFO] [stdout] 47 | |             .lines()
[INFO] [stdout] 48 | |             .next()
[INFO] [stdout] 49 | |             .unwrap_or("")
[INFO] [stdout] 50 | |             .trim()
[INFO] [stdout] 51 | |             .parse()?,
[INFO] [stdout]    | |____________________^
[INFO] [stdout] ...
[INFO] [stdout] 93 |   ImplStr!(String);
[INFO] [stdout]    |   ---------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in the macro `ImplStr` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/lib.rs:69:28
[INFO] [stdout]    |
[INFO] [stdout] 69 |             if let Ok(i) = i.parse() {
[INFO] [stdout]    |                            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 93 | ImplStr!(String);
[INFO] [stdout]    | ---------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in the macro `ImplStr` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rmw_str` (lib) due to 3 previous errors; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "ed764748476d2587bb33aee0f1dc0a4e5b117ba5fb1714047a0c2a46ca117574", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ed764748476d2587bb33aee0f1dc0a4e5b117ba5fb1714047a0c2a46ca117574", kill_on_drop: false }`
[INFO] [stdout] ed764748476d2587bb33aee0f1dc0a4e5b117ba5fb1714047a0c2a46ca117574
