[INFO] fetching crate unsafe_fn 0.1.2...
[INFO] checking unsafe_fn-0.1.2 against try#7014e13d5becc920d4bea3cd87942c8a13d359bf+rustflags=-Dtail_expr_drop_order for pr-129864
[INFO] extracting crate unsafe_fn 0.1.2 into /workspace/builds/worker-2-tc2/source
[INFO] validating manifest of crates.io crate unsafe_fn 0.1.2 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 unsafe_fn 0.1.2
[INFO] finished tweaking crates.io crate unsafe_fn 0.1.2
[INFO] tweaked toml for crates.io crate unsafe_fn 0.1.2 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 4 packages to latest compatible versions
[INFO] [stderr]       Adding proc-macro2 v0.4.30 (available: v1.0.86)
[INFO] [stderr]       Adding quote v0.6.13 (available: v1.0.37)
[INFO] [stderr]       Adding syn v0.15.44 (available: v2.0.77)
[INFO] [stderr]       Adding unicode-xid v0.1.0 (available: v0.2.6)
[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] 70ffc3ac27d9d13cbe85a8586fd84c6e0aba50adb0c0e275314a6d51192a919b
[INFO] running `Command { std: "docker" "start" "-a" "70ffc3ac27d9d13cbe85a8586fd84c6e0aba50adb0c0e275314a6d51192a919b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "70ffc3ac27d9d13cbe85a8586fd84c6e0aba50adb0c0e275314a6d51192a919b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "70ffc3ac27d9d13cbe85a8586fd84c6e0aba50adb0c0e275314a6d51192a919b", kill_on_drop: false }`
[INFO] [stdout] 70ffc3ac27d9d13cbe85a8586fd84c6e0aba50adb0c0e275314a6d51192a919b
[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] 298ceea144e1f6055f69a17ee7c350a42a5851dc1dddccc65ab7a0ced6c114da
[INFO] running `Command { std: "docker" "start" "-a" "298ceea144e1f6055f69a17ee7c350a42a5851dc1dddccc65ab7a0ced6c114da", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]     Checking unicode-xid v0.1.0
[INFO] [stderr]     Checking quote v0.6.13
[INFO] [stderr]     Checking unsafe_fn v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> tests/test.rs:91:33
[INFO] [stdout]    |
[INFO] [stdout] 91 | pub struct StructWithGen<'a, T>(&'a T);
[INFO] [stdout]    |            -------------        ^^^^^
[INFO] [stdout]    |            |
[INFO] [stdout]    |            field in this struct
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider removing this field
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `SomeTrait` is never used
[INFO] [stdout]    --> tests/test.rs:207:7
[INFO] [stdout]     |
[INFO] [stdout] 207 | trait SomeTrait {
[INFO] [stdout]     |       ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary allocation, use `&` instead
[INFO] [stdout]    --> tests/test.rs:174:25
[INFO] [stdout]     |
[INFO] [stdout] 174 |     assert_eq!(unsafe { Box::new(s2.clone()).i_plus(58) }, 5 + 9 + 58);
[INFO] [stdout]     |                         ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_allocation)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.63s
[INFO] running `Command { std: "docker" "inspect" "298ceea144e1f6055f69a17ee7c350a42a5851dc1dddccc65ab7a0ced6c114da", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "298ceea144e1f6055f69a17ee7c350a42a5851dc1dddccc65ab7a0ced6c114da", kill_on_drop: false }`
[INFO] [stdout] 298ceea144e1f6055f69a17ee7c350a42a5851dc1dddccc65ab7a0ced6c114da