[INFO] fetching crate srcfiles 0.1.0...
[INFO] checking srcfiles-0.1.0 against try#7014e13d5becc920d4bea3cd87942c8a13d359bf+rustflags=-Dtail_expr_drop_order for pr-129864
[INFO] extracting crate srcfiles 0.1.0 into /workspace/builds/worker-6-tc2/source
[INFO] validating manifest of crates.io crate srcfiles 0.1.0 on toolchain 7014e13d5becc920d4bea3cd87942c8a13d359bf
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate srcfiles 0.1.0
[INFO] finished tweaking crates.io crate srcfiles 0.1.0
[INFO] tweaked toml for crates.io crate srcfiles 0.1.0 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] crate crates.io crate srcfiles 0.1.0 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" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:ceb6ea022f8a89cebbe621bb4987e73a935bd40dfbb726f832cfff4742a5b95a" "/opt/rustwide/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a8318ccd5cb131760002aa6a324aa3ec3bcd7189e7ee07347e6162ea95600a66
[INFO] running `Command { std: "docker" "start" "-a" "a8318ccd5cb131760002aa6a324aa3ec3bcd7189e7ee07347e6162ea95600a66", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a8318ccd5cb131760002aa6a324aa3ec3bcd7189e7ee07347e6162ea95600a66", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a8318ccd5cb131760002aa6a324aa3ec3bcd7189e7ee07347e6162ea95600a66", kill_on_drop: false }`
[INFO] [stdout] a8318ccd5cb131760002aa6a324aa3ec3bcd7189e7ee07347e6162ea95600a66
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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 -Dtail_expr_drop_order" "-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:ceb6ea022f8a89cebbe621bb4987e73a935bd40dfbb726f832cfff4742a5b95a" "/opt/rustwide/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3949a584c0f4fb5b3be8f13d7a1f5a7552b32ccc23e479c637784f9cc02ad719
[INFO] running `Command { std: "docker" "start" "-a" "3949a584c0f4fb5b3be8f13d7a1f5a7552b32ccc23e479c637784f9cc02ad719", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.32
[INFO] [stderr]     Checking unicode-xid v0.2.2
[INFO] [stderr]    Compiling syn v1.0.81
[INFO] [stderr]     Checking quote v1.0.10
[INFO] [stderr]     Checking srcfiles v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: fields `if_token` and `cfg_attr` are never read
[INFO] [stdout]   --> src/visitor/cfg_if.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub struct CfgIf {
[INFO] [stdout]    |            ----- fields in this struct
[INFO] [stdout] 15 |     pub if_token: If,
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout] 16 |     pub cfg_attr: Attribute,
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `CfgIf` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `if_token` and `cfg_attr` are never read
[INFO] [stdout]   --> src/visitor/cfg_if.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub struct CfgIf {
[INFO] [stdout]    |            ----- fields in this struct
[INFO] [stdout] 15 |     pub if_token: If,
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout] 16 |     pub cfg_attr: Attribute,
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `CfgIf` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.22s
[INFO] running `Command { std: "docker" "inspect" "3949a584c0f4fb5b3be8f13d7a1f5a7552b32ccc23e479c637784f9cc02ad719", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3949a584c0f4fb5b3be8f13d7a1f5a7552b32ccc23e479c637784f9cc02ad719", kill_on_drop: false }`
[INFO] [stdout] 3949a584c0f4fb5b3be8f13d7a1f5a7552b32ccc23e479c637784f9cc02ad719