[INFO] fetching crate nullable-result 0.7.0...
[INFO] checking nullable-result-0.7.0 against 52995a223f2919dd3e2e427231db90a257350ded for pr-129249-4
[INFO] extracting crate nullable-result 0.7.0 into /workspace/builds/worker-5-tc2/source
[INFO] started tweaking crates.io crate nullable-result 0.7.0
[INFO] finished tweaking crates.io crate nullable-result 0.7.0
[INFO] tweaked toml for crates.io crate nullable-result 0.7.0 written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate nullable-result 0.7.0 on toolchain 52995a223f2919dd3e2e427231db90a257350ded
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+52995a223f2919dd3e2e427231db90a257350ded" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+52995a223f2919dd3e2e427231db90a257350ded" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+52995a223f2919dd3e2e427231db90a257350ded" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:77db811e55d90add9212f6832c23229e3de5f1c1f9905e8cb07319ea15df73ac" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 8cac83d7ab32ef2320791d69c4832860ca9b5ae215daf6a14bf6846801a0ccad
[INFO] running `Command { std: "docker" "start" "8cac83d7ab32ef2320791d69c4832860ca9b5ae215daf6a14bf6846801a0ccad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8cac83d7ab32ef2320791d69c4832860ca9b5ae215daf6a14bf6846801a0ccad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "8cac83d7ab32ef2320791d69c4832860ca9b5ae215daf6a14bf6846801a0ccad" "/opt/rustwide/cargo-home/bin/cargo" "+52995a223f2919dd3e2e427231db90a257350ded" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8cac83d7ab32ef2320791d69c4832860ca9b5ae215daf6a14bf6846801a0ccad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-w" "/opt/rustwide/workdir" "--user" "0:0" "8cac83d7ab32ef2320791d69c4832860ca9b5ae215daf6a14bf6846801a0ccad" "/opt/rustwide/cargo-home/bin/cargo" "+52995a223f2919dd3e2e427231db90a257350ded" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]     Checking nullable-result v0.7.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: useless conversion to the same type: `E`
[INFO] [stdout]    --> src/lib.rs:497:52
[INFO] [stdout]     |
[INFO] [stdout] 488 | macro_rules! extract {
[INFO] [stdout] ...
[INFO] [stdout] 497 |                 return $crate::NullableResult::Err(err.into());
[INFO] [stdout]     |                                                    ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 594 |             let item = extract!(item);
[INFO] [stdout]     |                        -------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this method call relies on the `impl<T> Into<T> for T` blanket implementation and type inference, which is a semver hazard as a new `impl Into<_>` that affects your type might be added in the future causing type inference errors
[INFO] [stdout]     = note: you can instead use the fully-qualified path `<E as Into<E>::into(val) to avoid triggering this lint
[INFO] [stdout]     = note: `#[deny(self_type_conversion)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: useless conversion to the same type: `E`
[INFO] [stdout]    --> src/lib.rs:497:52
[INFO] [stdout]     |
[INFO] [stdout] 488 | macro_rules! extract {
[INFO] [stdout] ...
[INFO] [stdout] 497 |                 return $crate::NullableResult::Err(err.into());
[INFO] [stdout]     |                                                    ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 610 |         self.try_find_map(|item| f(extract!(item)))
[INFO] [stdout]     |                                    -------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this method call relies on the `impl<T> Into<T> for T` blanket implementation and type inference, which is a semver hazard as a new `impl Into<_>` that affects your type might be added in the future causing type inference errors
[INFO] [stdout]     = note: you can instead use the fully-qualified path `<E as Into<E>::into(val) to avoid triggering this lint
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `nullable-result` (lib test) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: useless conversion to the same type: `E`
[INFO] [stdout]    --> src/lib.rs:497:52
[INFO] [stdout]     |
[INFO] [stdout] 488 | macro_rules! extract {
[INFO] [stdout] ...
[INFO] [stdout] 497 |                 return $crate::NullableResult::Err(err.into());
[INFO] [stdout]     |                                                    ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 594 |             let item = extract!(item);
[INFO] [stdout]     |                        -------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this method call relies on the `impl<T> Into<T> for T` blanket implementation and type inference, which is a semver hazard as a new `impl Into<_>` that affects your type might be added in the future causing type inference errors
[INFO] [stdout]     = note: you can instead use the fully-qualified path `<E as Into<E>::into(val) to avoid triggering this lint
[INFO] [stdout]     = note: `#[deny(self_type_conversion)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: useless conversion to the same type: `E`
[INFO] [stdout]    --> src/lib.rs:497:52
[INFO] [stdout]     |
[INFO] [stdout] 488 | macro_rules! extract {
[INFO] [stdout] ...
[INFO] [stdout] 497 |                 return $crate::NullableResult::Err(err.into());
[INFO] [stdout]     |                                                    ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 610 |         self.try_find_map(|item| f(extract!(item)))
[INFO] [stdout]     |                                    -------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this method call relies on the `impl<T> Into<T> for T` blanket implementation and type inference, which is a semver hazard as a new `impl Into<_>` that affects your type might be added in the future causing type inference errors
[INFO] [stdout]     = note: you can instead use the fully-qualified path `<E as Into<E>::into(val) to avoid triggering this lint
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `nullable-result` (lib) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "8cac83d7ab32ef2320791d69c4832860ca9b5ae215daf6a14bf6846801a0ccad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8cac83d7ab32ef2320791d69c4832860ca9b5ae215daf6a14bf6846801a0ccad", kill_on_drop: false }`
[INFO] [stdout] 8cac83d7ab32ef2320791d69c4832860ca9b5ae215daf6a14bf6846801a0ccad
