[INFO] fetching crate test-impl 0.2.0...
[INFO] checking test-impl-0.2.0 against try#7014e13d5becc920d4bea3cd87942c8a13d359bf+rustflags=-Dtail_expr_drop_order for pr-129864
[INFO] extracting crate test-impl 0.2.0 into /workspace/builds/worker-2-tc2/source
[INFO] validating manifest of crates.io crate test-impl 0.2.0 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 test-impl 0.2.0
[INFO] finished tweaking crates.io crate test-impl 0.2.0
[INFO] tweaked toml for crates.io crate test-impl 0.2.0 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 7 packages to latest compatible versions
[INFO] [stderr]       Adding syn v1.0.109 (available: v2.0.77)
[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-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] c2dba1e32d3b3e6e54dfcf6f50ea4536dfe439c683fef85d6389bec72924f1ba
[INFO] running `Command { std: "docker" "start" "-a" "c2dba1e32d3b3e6e54dfcf6f50ea4536dfe439c683fef85d6389bec72924f1ba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c2dba1e32d3b3e6e54dfcf6f50ea4536dfe439c683fef85d6389bec72924f1ba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c2dba1e32d3b3e6e54dfcf6f50ea4536dfe439c683fef85d6389bec72924f1ba", kill_on_drop: false }`
[INFO] [stdout] c2dba1e32d3b3e6e54dfcf6f50ea4536dfe439c683fef85d6389bec72924f1ba
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 8b6635356ac02aa34acaa1f5f82ca83ea31dde5181a1662083c20441cbb7d393
[INFO] running `Command { std: "docker" "start" "-a" "8b6635356ac02aa34acaa1f5f82ca83ea31dde5181a1662083c20441cbb7d393", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]     Checking test-impl v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait `ExampleTrait` is never used
[INFO] [stdout]  --> tests/example.rs:5:7
[INFO] [stdout]   |
[INFO] [stdout] 5 | trait ExampleTrait: Debug {
[INFO] [stdout]   |       ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ExampleStruct` is never constructed
[INFO] [stdout]   --> tests/example.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | struct ExampleStruct;
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ExampleStruct2` is never constructed
[INFO] [stdout]   --> tests/example.rs:19:8
[INFO] [stdout]    |
[INFO] [stdout] 19 | struct ExampleStruct2;
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Whaa` is never used
[INFO] [stdout]  --> tests/example_lifetime.rs:5:7
[INFO] [stdout]   |
[INFO] [stdout] 5 | trait Whaa {}
[INFO] [stdout]   |       ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.99s
[INFO] running `Command { std: "docker" "inspect" "8b6635356ac02aa34acaa1f5f82ca83ea31dde5181a1662083c20441cbb7d393", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8b6635356ac02aa34acaa1f5f82ca83ea31dde5181a1662083c20441cbb7d393", kill_on_drop: false }`
[INFO] [stdout] 8b6635356ac02aa34acaa1f5f82ca83ea31dde5181a1662083c20441cbb7d393