[INFO] fetching crate simple-server 0.4.0... [INFO] checking simple-server-0.4.0 against try#c387b04bf028733cd561d62128c8a5eee4bc1458+rustflags=-Dtail_expr_drop_order for pr-130930 [INFO] extracting crate simple-server 0.4.0 into /workspace/builds/worker-1-tc2/source [INFO] validating manifest of crates.io crate simple-server 0.4.0 on toolchain c387b04bf028733cd561d62128c8a5eee4bc1458 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking crates.io crate simple-server 0.4.0 [INFO] finished tweaking crates.io crate simple-server 0.4.0 [INFO] tweaked toml for crates.io crate simple-server 0.4.0 written to /workspace/builds/worker-1-tc2/source/Cargo.toml [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Updating crates.io index [INFO] [stderr] Locking 29 packages to latest compatible versions [INFO] [stderr] Adding aho-corasick v0.5.3 (available: v1.1.3) [INFO] [stderr] Adding bytes v0.4.12 (available: v1.7.2) [INFO] [stderr] Adding env_logger v0.3.5 (available: v0.11.5) [INFO] [stderr] Adding hermit-abi v0.3.9 (available: v0.4.0) [INFO] [stderr] Adding http v0.1.21 (available: v1.1.0) [INFO] [stderr] Adding itoa v0.4.8 (available: v1.0.11) [INFO] [stderr] Adding log v0.3.9 (available: v0.4.22) [INFO] [stderr] Adding memchr v0.1.11 (available: v2.7.4) [INFO] [stderr] Adding regex v0.1.80 (available: v1.10.6) [INFO] [stderr] Adding regex-syntax v0.3.9 (available: v0.8.4) [INFO] [stderr] Adding thread-id v2.0.0 (available: v4.2.2) [INFO] [stderr] Adding thread_local v0.2.7 (available: v1.1.8) [INFO] [stderr] Adding time v0.1.45 (available: v0.3.36) [INFO] [stderr] Adding utf8-ranges v0.1.3 (available: v1.0.5) [INFO] [stderr] Adding wasi v0.10.0+wasi-snapshot-preview1 (available: v0.10.2+wasi-snapshot-preview1) [INFO] [stderr] Adding winapi v0.2.8 (available: v0.3.9) [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2021 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:6252d7ea7fb8caaf7af6d800c5fb250a9cd862b9a7f9508afb3c54fa7fe1102e" "/opt/rustwide/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 9a18073ad2613634d1f81cdc846d43c2344981b5a3967d3c6caf14c19568a14b [INFO] running `Command { std: "docker" "start" "-a" "9a18073ad2613634d1f81cdc846d43c2344981b5a3967d3c6caf14c19568a14b", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "9a18073ad2613634d1f81cdc846d43c2344981b5a3967d3c6caf14c19568a14b", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "9a18073ad2613634d1f81cdc846d43c2344981b5a3967d3c6caf14c19568a14b", kill_on_drop: false }` [INFO] [stdout] 9a18073ad2613634d1f81cdc846d43c2344981b5a3967d3c6caf14c19568a14b [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:6252d7ea7fb8caaf7af6d800c5fb250a9cd862b9a7f9508afb3c54fa7fe1102e" "/opt/rustwide/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 4d73af7110cfb48d84357618d6dfd90e33b43a00cfcf4e2900e446eb5976bb39 [INFO] running `Command { std: "docker" "start" "-a" "4d73af7110cfb48d84357618d6dfd90e33b43a00cfcf4e2900e446eb5976bb39", kill_on_drop: false }` [INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2021 [INFO] [stderr] Compiling winapi-build v0.1.1 [INFO] [stderr] Checking winapi v0.2.8 [INFO] [stderr] Checking itoa v0.4.8 [INFO] [stderr] Checking log v0.3.9 [INFO] [stderr] Checking utf8-ranges v0.1.3 [INFO] [stderr] Checking regex-syntax v0.3.9 [INFO] [stderr] Checking iovec v0.1.4 [INFO] [stderr] Checking memchr v0.1.11 [INFO] [stderr] Checking aho-corasick v0.5.3 [INFO] [stderr] Checking bytes v0.4.12 [INFO] [stderr] Checking time v0.1.45 [INFO] [stderr] Checking num_cpus v1.16.0 [INFO] [stderr] Compiling kernel32-sys v0.2.2 [INFO] [stderr] Checking scoped_threadpool v0.1.9 [INFO] [stderr] Checking thread-id v2.0.0 [INFO] [stderr] Checking thread_local v0.2.7 [INFO] [stderr] Checking http v0.1.21 [INFO] [stderr] Checking regex v0.1.80 [INFO] [stderr] Checking env_logger v0.3.5 [INFO] [stderr] Checking simple-server v0.4.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> src/lib.rs:62:9 [INFO] [stdout] | [INFO] [stdout] 62 | Box>, ResponseBuilder) -> ResponseResult + 'static + Send + Sync>; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021! [INFO] [stdout] = note: for more information, see [INFO] [stdout] = note: `#[warn(bare_trait_objects)]` on by default [INFO] [stdout] help: if this is an object-safe trait, use `dyn` [INFO] [stdout] | [INFO] [stdout] 62 | Box>, ResponseBuilder) -> ResponseResult + 'static + Send + Sync>; [INFO] [stdout] | +++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> src/lib.rs:62:9 [INFO] [stdout] | [INFO] [stdout] 62 | Box>, ResponseBuilder) -> ResponseResult + 'static + Send + Sync>; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021! [INFO] [stdout] = note: for more information, see [INFO] [stdout] = note: `#[warn(bare_trait_objects)]` on by default [INFO] [stdout] help: if this is an object-safe trait, use `dyn` [INFO] [stdout] | [INFO] [stdout] 62 | Box>, ResponseBuilder) -> ResponseResult + 'static + Send + Sync>; [INFO] [stdout] | +++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used [INFO] [stdout] --> src/request.rs:32:25 [INFO] [stdout] | [INFO] [stdout] 32 | mem::replace(&mut buffer, b); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: if you don't need the old value, you can just assign the new value directly [INFO] [stdout] = note: `#[warn(unused_must_use)]` on by default [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 32 | let _ = mem::replace(&mut buffer, b); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused borrow that must be used [INFO] [stdout] --> src/request.rs:121:25 [INFO] [stdout] | [INFO] [stdout] 121 | &buf[..min].copy_from_slice(&self.content[..min]); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value [INFO] [stdout] | [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 121 | let _ = &buf[..min].copy_from_slice(&self.content[..min]); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused borrow that must be used [INFO] [stdout] --> src/request.rs:126:25 [INFO] [stdout] | [INFO] [stdout] 126 | / &buf[..min] [INFO] [stdout] 127 | | .copy_from_slice(&self.content[self.bytes_read..self.bytes_read + min]); [INFO] [stdout] | |___________________________________________________________________________________________________^ the borrow produces a value [INFO] [stdout] | [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 126 | let _ = &buf[..min] [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 4 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used [INFO] [stdout] --> src/request.rs:32:25 [INFO] [stdout] | [INFO] [stdout] 32 | mem::replace(&mut buffer, b); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: if you don't need the old value, you can just assign the new value directly [INFO] [stdout] = note: `#[warn(unused_must_use)]` on by default [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 32 | let _ = mem::replace(&mut buffer, b); [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 4.30s [INFO] running `Command { std: "docker" "inspect" "4d73af7110cfb48d84357618d6dfd90e33b43a00cfcf4e2900e446eb5976bb39", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "4d73af7110cfb48d84357618d6dfd90e33b43a00cfcf4e2900e446eb5976bb39", kill_on_drop: false }` [INFO] [stdout] 4d73af7110cfb48d84357618d6dfd90e33b43a00cfcf4e2900e446eb5976bb39