[INFO] fetching crate extension-trait 0.2.1...
[INFO] checking extension-trait-0.2.1 against master#0d37dca25a51fb900a402c94c8818ad1c2789e30 for pr-77526
[INFO] extracting crate extension-trait 0.2.1 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate extension-trait 0.2.1 on toolchain 0d37dca25a51fb900a402c94c8818ad1c2789e30
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate extension-trait 0.2.1
[INFO] finished tweaking crates.io crate extension-trait 0.2.1
[INFO] tweaked toml for crates.io crate extension-trait 0.2.1 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 6424950c3ed0c10a773aa90538769920174e59962d6501562e35aabea63ed8a7
[INFO] running `Command { std: "docker" "start" "-a" "6424950c3ed0c10a773aa90538769920174e59962d6501562e35aabea63ed8a7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6424950c3ed0c10a773aa90538769920174e59962d6501562e35aabea63ed8a7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6424950c3ed0c10a773aa90538769920174e59962d6501562e35aabea63ed8a7", kill_on_drop: false }`
[INFO] [stdout] 6424950c3ed0c10a773aa90538769920174e59962d6501562e35aabea63ed8a7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "-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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9018e02e59e25839fd59652fd94a0e97df7152621407fce372a6d3c2f8c7bbde
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "9018e02e59e25839fd59652fd94a0e97df7152621407fce372a6d3c2f8c7bbde", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]     Checking unicode-xid v0.2.1
[INFO] [stderr]     Checking quote v1.0.7
[INFO] [stderr]     Checking syn v1.0.42
[INFO] [stderr]     Checking extension-trait v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]   --> src/lib.rs:77:9
[INFO] [stdout]    |
[INFO] [stdout] 77 | /         (quote! {
[INFO] [stdout] 78 | |             #(#attrs)*
[INFO] [stdout] 79 | |             #visibility #unsafety trait #path {
[INFO] [stdout] 80 | |                 #(#items)*
[INFO] [stdout] ...  |
[INFO] [stdout] 83 | |         }
[INFO] [stdout] 84 | |         .into())
[INFO] [stdout]    | |________________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 77 |         quote! {
[INFO] [stdout] 78 |             #(#attrs)*
[INFO] [stdout] 79 |             #visibility #unsafety trait #path {
[INFO] [stdout] 80 |                 #(#items)*
[INFO] [stdout] 81 |             }
[INFO] [stdout] 82 |             #input
[INFO] [stdout]  ...
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]   --> src/lib.rs:77:9
[INFO] [stdout]    |
[INFO] [stdout] 77 | /         (quote! {
[INFO] [stdout] 78 | |             #(#attrs)*
[INFO] [stdout] 79 | |             #visibility #unsafety trait #path {
[INFO] [stdout] 80 | |                 #(#items)*
[INFO] [stdout] ...  |
[INFO] [stdout] 83 | |         }
[INFO] [stdout] 84 | |         .into())
[INFO] [stdout]    | |________________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 77 |         quote! {
[INFO] [stdout] 78 |             #(#attrs)*
[INFO] [stdout] 79 |             #visibility #unsafety trait #path {
[INFO] [stdout] 80 |                 #(#items)*
[INFO] [stdout] 81 |             }
[INFO] [stdout] 82 |             #input
[INFO] [stdout]  ...
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]   --> src/lib.rs:77:9
[INFO] [stdout]    |
[INFO] [stdout] 77 | /         (quote! {
[INFO] [stdout] 78 | |             #(#attrs)*
[INFO] [stdout] 79 | |             #visibility #unsafety trait #path {
[INFO] [stdout] 80 | |                 #(#items)*
[INFO] [stdout] ...  |
[INFO] [stdout] 83 | |         }
[INFO] [stdout] 84 | |         .into())
[INFO] [stdout]    | |________________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 77 |         quote! {
[INFO] [stdout] 78 |             #(#attrs)*
[INFO] [stdout] 79 |             #visibility #unsafety trait #path {
[INFO] [stdout] 80 |                 #(#items)*
[INFO] [stdout] 81 |             }
[INFO] [stdout] 82 |             #input
[INFO] [stdout]  ...
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 19.65s
[INFO] running `Command { std: "docker" "inspect" "9018e02e59e25839fd59652fd94a0e97df7152621407fce372a6d3c2f8c7bbde", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9018e02e59e25839fd59652fd94a0e97df7152621407fce372a6d3c2f8c7bbde", kill_on_drop: false }`
[INFO] [stdout] 9018e02e59e25839fd59652fd94a0e97df7152621407fce372a6d3c2f8c7bbde