[INFO] fetching crate safer_ffi-proc_macros 0.2.0-rc1...
[INFO] checking safer_ffi-proc_macros-0.2.0-rc1 against a5689b034ad287112f709693384a37f1377eb9cc for pr-129249-3
[INFO] extracting crate safer_ffi-proc_macros 0.2.0-rc1 into /workspace/builds/worker-6-tc2/source
[INFO] started tweaking crates.io crate safer_ffi-proc_macros 0.2.0-rc1
[INFO] finished tweaking crates.io crate safer_ffi-proc_macros 0.2.0-rc1
[INFO] tweaked toml for crates.io crate safer_ffi-proc_macros 0.2.0-rc1 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate safer_ffi-proc_macros 0.2.0-rc1 on toolchain a5689b034ad287112f709693384a37f1377eb9cc
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a5689b034ad287112f709693384a37f1377eb9cc" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate safer_ffi-proc_macros 0.2.0-rc1 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" "+a5689b034ad287112f709693384a37f1377eb9cc" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 6fa72777b5d0f2f6c93a8d003a91079eff1b44dcec9ba6fafee1571dbce92af0
[INFO] running `Command { std: "docker" "start" "6fa72777b5d0f2f6c93a8d003a91079eff1b44dcec9ba6fafee1571dbce92af0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6fa72777b5d0f2f6c93a8d003a91079eff1b44dcec9ba6fafee1571dbce92af0", 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" "6fa72777b5d0f2f6c93a8d003a91079eff1b44dcec9ba6fafee1571dbce92af0" "/opt/rustwide/cargo-home/bin/cargo" "+a5689b034ad287112f709693384a37f1377eb9cc" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6fa72777b5d0f2f6c93a8d003a91079eff1b44dcec9ba6fafee1571dbce92af0", 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" "6fa72777b5d0f2f6c93a8d003a91079eff1b44dcec9ba6fafee1571dbce92af0" "/opt/rustwide/cargo-home/bin/cargo" "+a5689b034ad287112f709693384a37f1377eb9cc" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.94
[INFO] [stderr]     Checking unicode-ident v1.0.8
[INFO] [stderr]    Compiling paste v1.0.12
[INFO] [stderr]    Compiling prettyplease v0.2.32
[INFO] [stderr]    Compiling macro_rules_attribute-proc_macro v0.1.3
[INFO] [stderr]     Checking macro_rules_attribute v0.1.3
[INFO] [stderr]     Checking quote v1.0.40
[INFO] [stderr]     Checking syn v2.0.100
[INFO] [stderr]     Checking safer_ffi-proc_macros v0.2.0-rc1 (/opt/rustwide/workdir)
[INFO] [stdout] error: useless conversion to the same type: `proc_macro2::TokenStream`
[INFO] [stdout]    --> _mod.rs:142:18
[INFO] [stdout]     |
[INFO] [stdout] 142 |     respan(span, tts.into()).into()
[INFO] [stdout]     |                  ^^^^^^^^^^
[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: `#[deny(self_type_conversion)]` on by default
[INFO] [stdout] help: consider removing the conversion call
[INFO] [stdout]     |
[INFO] [stdout] 142 -     respan(span, tts.into()).into()
[INFO] [stdout] 142 +     respan(span, tts).into()
[INFO] [stdout]     |
[INFO] [stdout] help: you can use the fully-qualified path to avoid triggering this lint
[INFO] [stdout]     |
[INFO] [stdout] 142 -     respan(span, tts.into()).into()
[INFO] [stdout] 142 +     respan(span, <proc_macro2::TokenStream as Into<_>>::into(tts)).into()
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: useless conversion to the same type: `proc_macro2::TokenStream`
[INFO] [stdout]    --> _mod.rs:142:18
[INFO] [stdout]     |
[INFO] [stdout] 142 |     respan(span, tts.into()).into()
[INFO] [stdout]     |                  ^^^^^^^^^^
[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: `#[deny(self_type_conversion)]` on by default
[INFO] [stdout] help: consider removing the conversion call
[INFO] [stdout]     |
[INFO] [stdout] 142 -     respan(span, tts.into()).into()
[INFO] [stdout] 142 +     respan(span, tts).into()
[INFO] [stdout]     |
[INFO] [stdout] help: you can use the fully-qualified path to avoid triggering this lint
[INFO] [stdout]     |
[INFO] [stdout] 142 -     respan(span, tts.into()).into()
[INFO] [stdout] 142 +     respan(span, <proc_macro2::TokenStream as Into<_>>::into(tts)).into()
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `safer_ffi-proc_macros` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `safer_ffi-proc_macros` (lib test) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "6fa72777b5d0f2f6c93a8d003a91079eff1b44dcec9ba6fafee1571dbce92af0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6fa72777b5d0f2f6c93a8d003a91079eff1b44dcec9ba6fafee1571dbce92af0", kill_on_drop: false }`
[INFO] [stdout] 6fa72777b5d0f2f6c93a8d003a91079eff1b44dcec9ba6fafee1571dbce92af0
