[INFO] fetching crate fn_block 0.2.1...
[INFO] checking fn_block-0.2.1 against master#2748a9fd93dd1a00a4521f4f16de5befbf77f6cd for pr-62262-1
[INFO] extracting crate fn_block 0.2.1 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate fn_block 0.2.1 on toolchain 2748a9fd93dd1a00a4521f4f16de5befbf77f6cd
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate fn_block 0.2.1
[INFO] finished tweaking crates.io crate fn_block 0.2.1
[INFO] tweaked toml for crates.io crate fn_block 0.2.1 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 89d99b5e7be768cd52c377781ba133096c132c46325d960841a5d4d2a19cf03b
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `"docker" "start" "-a" "89d99b5e7be768cd52c377781ba133096c132c46325d960841a5d4d2a19cf03b"`
[INFO] [stderr]     Checking fn_block v0.2.1 (/opt/rustwide/workdir)
[INFO] [stderr] warning: use of deprecated item 'fn_block': Please use `fn_expr` instead, since it can also be used to wrap blocks. Blocks are expressions as well.
[INFO] [stderr]   --> src/tests.rs:25:15
[INFO] [stderr]    |
[INFO] [stderr] 25 |     let foo = fn_block!{{
[INFO] [stderr]    |               ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'fn_block': Please use `fn_expr` instead, since it can also be used to wrap blocks. Blocks are expressions as well.
[INFO] [stderr]   --> src/tests.rs:35:15
[INFO] [stderr]    |
[INFO] [stderr] 35 |     let foo = fn_block!{{
[INFO] [stderr]    |               ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'fn_block': Please use `fn_expr` instead, since it can also be used to wrap blocks. Blocks are expressions as well.
[INFO] [stderr]   --> src/tests.rs:79:15
[INFO] [stderr]    |
[INFO] [stderr] 79 |     let res = fn_block!{ Result<u32,ParseIntError>: {
[INFO] [stderr]    |               ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `s`
[INFO] [stderr]   --> benches/fn_block_benchmark.rs:10:9
[INFO] [stderr]    |
[INFO] [stderr] 10 |     let s = o.and_then(|st| st.get(0..3)).map(|st| st.to_lowercase());
[INFO] [stderr]    |         ^ help: consider prefixing with an underscore: `_s`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `s`
[INFO] [stderr]   --> benches/fn_block_benchmark.rs:14:9
[INFO] [stderr]    |
[INFO] [stderr] 14 |     let s = (|| Some(o?.get(0..3)?.to_lowercase()))();
[INFO] [stderr]    |         ^ help: consider prefixing with an underscore: `_s`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `s`
[INFO] [stderr]   --> benches/fn_block_benchmark.rs:18:9
[INFO] [stderr]    |
[INFO] [stderr] 18 |     let s = fn_expr!{ o?.get(0..3)?.to_lowercase().into_some() };
[INFO] [stderr]    |         ^ help: consider prefixing with an underscore: `_s`
[INFO] [stderr] 
[INFO] [stderr] warning: unused attribute
[INFO] [stderr]  --> benches/fn_block_benchmark.rs:5:1
[INFO] [stderr]   |
[INFO] [stderr] 5 | #[macro_use]
[INFO] [stderr]   | ^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_attributes)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.01s
[INFO] running `"docker" "inspect" "89d99b5e7be768cd52c377781ba133096c132c46325d960841a5d4d2a19cf03b"`
[INFO] running `"docker" "rm" "-f" "89d99b5e7be768cd52c377781ba133096c132c46325d960841a5d4d2a19cf03b"`
[INFO] [stdout] 89d99b5e7be768cd52c377781ba133096c132c46325d960841a5d4d2a19cf03b