[INFO] fetching crate soft-test-failures 0.2.0...
[INFO] checking soft-test-failures-0.2.0 against try#7014e13d5becc920d4bea3cd87942c8a13d359bf+rustflags=-Dtail_expr_drop_order for pr-129864
[INFO] extracting crate soft-test-failures 0.2.0 into /workspace/builds/worker-6-tc2/source
[INFO] validating manifest of crates.io crate soft-test-failures 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 soft-test-failures 0.2.0
[INFO] finished tweaking crates.io crate soft-test-failures 0.2.0
[INFO] tweaked toml for crates.io crate soft-test-failures 0.2.0 written to /workspace/builds/worker-6-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] 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] 81214e736214d0dbf2d4cd22f712a6351fd0cc8de97d8dc3577fae88246a90c2
[INFO] running `Command { std: "docker" "start" "-a" "81214e736214d0dbf2d4cd22f712a6351fd0cc8de97d8dc3577fae88246a90c2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "81214e736214d0dbf2d4cd22f712a6351fd0cc8de97d8dc3577fae88246a90c2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "81214e736214d0dbf2d4cd22f712a6351fd0cc8de97d8dc3577fae88246a90c2", kill_on_drop: false }`
[INFO] [stdout] 81214e736214d0dbf2d4cd22f712a6351fd0cc8de97d8dc3577fae88246a90c2
[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] 86e204e8abbdd5a641f216cf759dfc298b5ade1877fc5a0d025e51894925e1d5
[INFO] running `Command { std: "docker" "start" "-a" "86e204e8abbdd5a641f216cf759dfc298b5ade1877fc5a0d025e51894925e1d5", kill_on_drop: false }`
[INFO] [stderr]     Checking soft-test-failures v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> src/lib.rs:58:24
[INFO] [stdout]    |
[INFO] [stdout] 58 |                 panic!(msg);
[INFO] [stdout]    |                        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 76 |     let_fail!();
[INFO] [stdout]    |     ----------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this usage of `panic!()` is deprecated; it will be a hard error in Rust 2021
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stdout]    = note: `#[warn(non_fmt_panics)]` on by default
[INFO] [stdout]    = note: this warning originates in the macro `let_fail` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: add a "{}" format string to `Display` the message
[INFO] [stdout]    |
[INFO] [stdout] 58 |                 panic!("{}", msg);
[INFO] [stdout]    |                        +++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> src/lib.rs:58:24
[INFO] [stdout]    |
[INFO] [stdout] 58 |                 panic!(msg);
[INFO] [stdout]    |                        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 88 |     let_fail!();
[INFO] [stdout]    |     ----------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this usage of `panic!()` is deprecated; it will be a hard error in Rust 2021
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stdout]    = note: this warning originates in the macro `let_fail` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: add a "{}" format string to `Display` the message
[INFO] [stdout]    |
[INFO] [stdout] 58 |                 panic!("{}", msg);
[INFO] [stdout]    |                        +++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.15s
[INFO] running `Command { std: "docker" "inspect" "86e204e8abbdd5a641f216cf759dfc298b5ade1877fc5a0d025e51894925e1d5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "86e204e8abbdd5a641f216cf759dfc298b5ade1877fc5a0d025e51894925e1d5", kill_on_drop: false }`
[INFO] [stdout] 86e204e8abbdd5a641f216cf759dfc298b5ade1877fc5a0d025e51894925e1d5