[INFO] fetching crate flexible-locks 0.1.0... [INFO] checking flexible-locks-0.1.0 against master#22572d0994593197593e2a1b7b18d720a9a349a7 for pr-126452-1 [INFO] extracting crate flexible-locks 0.1.0 into /workspace/builds/worker-6-tc1/source [INFO] validating manifest of crates.io crate flexible-locks 0.1.0 on toolchain 22572d0994593197593e2a1b7b18d720a9a349a7 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+22572d0994593197593e2a1b7b18d720a9a349a7" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking crates.io crate flexible-locks 0.1.0 [INFO] finished tweaking crates.io crate flexible-locks 0.1.0 [INFO] tweaked toml for crates.io crate flexible-locks 0.1.0 written to /workspace/builds/worker-6-tc1/source/Cargo.toml [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+22572d0994593197593e2a1b7b18d720a9a349a7" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Updating crates.io index [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] [stderr] Locking 21 packages to latest compatible versions [INFO] [stderr] Adding owning_ref v0.3.3 (latest: v0.4.1) [INFO] [stderr] Adding parking_lot v0.5.5 (latest: v0.12.3) [INFO] [stderr] Adding parking_lot_core v0.2.14 (latest: v0.9.10) [INFO] [stderr] Adding proc-macro2 v0.3.8 (latest: v1.0.86) [INFO] [stderr] Adding quote v0.5.2 (latest: v1.0.37) [INFO] [stderr] Adding rand v0.4.6 (latest: v0.8.5) [INFO] [stderr] Adding rand_core v0.3.1 (latest: v0.6.4) [INFO] [stderr] Adding rand_core v0.4.2 (latest: v0.6.4) [INFO] [stderr] Adding rdrand v0.4.0 (latest: v0.8.3) [INFO] [stderr] Adding smallvec v0.6.14 (latest: v1.13.2) [INFO] [stderr] Adding syn v0.13.11 (latest: v2.0.77) [INFO] [stderr] Adding unicode-xid v0.1.0 (latest: v0.2.5) [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+22572d0994593197593e2a1b7b18d720a9a349a7" "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] [stderr] Downloading crates ... [INFO] [stderr] Downloaded owning_ref v0.3.3 [INFO] [stderr] Downloaded flexible-locks_derive v0.1.0 [INFO] [stderr] Downloaded proc-macro2 v0.3.8 [INFO] [stderr] Downloaded parking_lot v0.5.5 [INFO] [stderr] Downloaded quote v0.5.2 [INFO] [stderr] Downloaded syn v0.13.11 [INFO] [stderr] Downloaded parking_lot_core v0.2.14 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+22572d0994593197593e2a1b7b18d720a9a349a7" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 4be5666df75c76f1f15b58c20b8afc83e75bcf4959975b36879305fd0316730d [INFO] running `Command { std: "docker" "start" "-a" "4be5666df75c76f1f15b58c20b8afc83e75bcf4959975b36879305fd0316730d", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "4be5666df75c76f1f15b58c20b8afc83e75bcf4959975b36879305fd0316730d", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "4be5666df75c76f1f15b58c20b8afc83e75bcf4959975b36879305fd0316730d", kill_on_drop: false }` [INFO] [stdout] 4be5666df75c76f1f15b58c20b8afc83e75bcf4959975b36879305fd0316730d [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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" "-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+22572d0994593197593e2a1b7b18d720a9a349a7" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 2f4299c48ef7713b0893a20701539a293e1ba22978d4bd085c828bbc7a01be93 [INFO] running `Command { std: "docker" "start" "-a" "2f4299c48ef7713b0893a20701539a293e1ba22978d4bd085c828bbc7a01be93", kill_on_drop: false }` [INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2021 [INFO] [stderr] Compiling unicode-xid v0.1.0 [INFO] [stderr] Compiling proc-macro2 v0.3.8 [INFO] [stderr] Compiling quote v0.5.2 [INFO] [stderr] Compiling syn v0.13.11 [INFO] [stderr] Compiling flexible-locks_derive v0.1.0 [INFO] [stderr] Checking flexible-locks v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unexpected `cfg` condition value: `allocator_api` [INFO] [stdout] --> src/lib.rs:44:7 [INFO] [stdout] | [INFO] [stdout] 44 | #[cfg(feature = "allocator_api")] [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: expected values for `feature` are: `default`, `parking_lot`, and `std` [INFO] [stdout] = help: consider adding `allocator_api` as a feature in `Cargo.toml` [INFO] [stdout] = note: see for more information about checking conditional configuration [INFO] [stdout] = note: `#[warn(unexpected_cfgs)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unexpected `cfg` condition value: `allocator_api` [INFO] [stdout] --> src/lib.rs:44:7 [INFO] [stdout] | [INFO] [stdout] 44 | #[cfg(feature = "allocator_api")] [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: expected values for `feature` are: `default`, `parking_lot`, and `std` [INFO] [stdout] = help: consider adding `allocator_api` as a feature in `Cargo.toml` [INFO] [stdout] = note: see for more information about checking conditional configuration [INFO] [stdout] = note: `#[warn(unexpected_cfgs)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: use of deprecated function `core::mem::uninitialized`: use `mem::MaybeUninit` instead [INFO] [stdout] --> src/os.rs:257:56 [INFO] [stdout] | [INFO] [stdout] 257 | let mut attr: libc::pthread_mutexattr_t = mem::uninitialized(); [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(deprecated)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: use of deprecated function `core::mem::uninitialized`: use `mem::MaybeUninit` instead [INFO] [stdout] --> src/os.rs:257:56 [INFO] [stdout] | [INFO] [stdout] 257 | let mut attr: libc::pthread_mutexattr_t = mem::uninitialized(); [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(deprecated)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: the type `pthread_mutexattr_t` does not permit being left uninitialized [INFO] [stdout] --> src/os.rs:257:51 [INFO] [stdout] | [INFO] [stdout] 257 | let mut attr: libc::pthread_mutexattr_t = mem::uninitialized(); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | this code causes undefined behavior when executed [INFO] [stdout] | help: use `MaybeUninit` instead, and only call `assume_init` after initialization is done [INFO] [stdout] | [INFO] [stdout] = note: integers must be initialized [INFO] [stdout] = note: `#[warn(invalid_value)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 3 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: the type `pthread_mutexattr_t` does not permit being left uninitialized [INFO] [stdout] --> src/os.rs:257:51 [INFO] [stdout] | [INFO] [stdout] 257 | let mut attr: libc::pthread_mutexattr_t = mem::uninitialized(); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | this code causes undefined behavior when executed [INFO] [stdout] | help: use `MaybeUninit` instead, and only call `assume_init` after initialization is done [INFO] [stdout] | [INFO] [stdout] = note: integers must be initialized [INFO] [stdout] = note: `#[warn(invalid_value)]` 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 2.39s [INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: syn v0.13.11 [INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 4` [INFO] running `Command { std: "docker" "inspect" "2f4299c48ef7713b0893a20701539a293e1ba22978d4bd085c828bbc7a01be93", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "2f4299c48ef7713b0893a20701539a293e1ba22978d4bd085c828bbc7a01be93", kill_on_drop: false }` [INFO] [stdout] 2f4299c48ef7713b0893a20701539a293e1ba22978d4bd085c828bbc7a01be93 [INFO] checking flexible-locks-0.1.0 against try#6289438dbad80b1a0029c66dd3f6abf57c2c51be for pr-126452-1 [INFO] extracting crate flexible-locks 0.1.0 into /workspace/builds/worker-6-tc2/source [INFO] validating manifest of crates.io crate flexible-locks 0.1.0 on toolchain 6289438dbad80b1a0029c66dd3f6abf57c2c51be [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+6289438dbad80b1a0029c66dd3f6abf57c2c51be" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking crates.io crate flexible-locks 0.1.0 [INFO] finished tweaking crates.io crate flexible-locks 0.1.0 [INFO] tweaked toml for crates.io crate flexible-locks 0.1.0 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" "+6289438dbad80b1a0029c66dd3f6abf57c2c51be" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Updating crates.io index [INFO] [stderr] Locking 21 packages to latest compatible versions [INFO] [stderr] Adding owning_ref v0.3.3 (latest: v0.4.1) [INFO] [stderr] Adding parking_lot v0.5.5 (latest: v0.12.3) [INFO] [stderr] Adding parking_lot_core v0.2.14 (latest: v0.9.10) [INFO] [stderr] Adding proc-macro2 v0.3.8 (latest: v1.0.86) [INFO] [stderr] Adding quote v0.5.2 (latest: v1.0.37) [INFO] [stderr] Adding rand v0.4.6 (latest: v0.8.5) [INFO] [stderr] Adding rand_core v0.3.1 (latest: v0.6.4) [INFO] [stderr] Adding rand_core v0.4.2 (latest: v0.6.4) [INFO] [stderr] Adding rdrand v0.4.0 (latest: v0.8.3) [INFO] [stderr] Adding smallvec v0.6.14 (latest: v1.13.2) [INFO] [stderr] Adding syn v0.13.11 (latest: v2.0.77) [INFO] [stderr] Adding unicode-xid v0.1.0 (latest: v0.2.5) [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+6289438dbad80b1a0029c66dd3f6abf57c2c51be" "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-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+6289438dbad80b1a0029c66dd3f6abf57c2c51be" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 4825d22b51b03f0a2517b9c2f34282ea29e24e46579399ed6e27fc30b649f4d5 [INFO] running `Command { std: "docker" "start" "-a" "4825d22b51b03f0a2517b9c2f34282ea29e24e46579399ed6e27fc30b649f4d5", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "4825d22b51b03f0a2517b9c2f34282ea29e24e46579399ed6e27fc30b649f4d5", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "4825d22b51b03f0a2517b9c2f34282ea29e24e46579399ed6e27fc30b649f4d5", kill_on_drop: false }` [INFO] [stdout] 4825d22b51b03f0a2517b9c2f34282ea29e24e46579399ed6e27fc30b649f4d5 [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" "-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+6289438dbad80b1a0029c66dd3f6abf57c2c51be" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] cc07e93a249a335931dbd85beef1315e79538f30f06e4a4c4c4416f93ea377da [INFO] running `Command { std: "docker" "start" "-a" "cc07e93a249a335931dbd85beef1315e79538f30f06e4a4c4c4416f93ea377da", kill_on_drop: false }` [INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2021 [INFO] [stderr] Compiling unicode-xid v0.1.0 [INFO] [stderr] Compiling proc-macro2 v0.3.8 [INFO] [stderr] Compiling quote v0.5.2 [INFO] [stderr] Compiling syn v0.13.11 [INFO] [stderr] Compiling flexible-locks_derive v0.1.0 [INFO] [stderr] Checking flexible-locks v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unexpected `cfg` condition value: `allocator_api` [INFO] [stdout] --> src/lib.rs:44:7 [INFO] [stdout] | [INFO] [stdout] 44 | #[cfg(feature = "allocator_api")] [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: expected values for `feature` are: `default`, `parking_lot`, and `std` [INFO] [stdout] = help: consider adding `allocator_api` as a feature in `Cargo.toml` [INFO] [stdout] = note: see for more information about checking conditional configuration [INFO] [stdout] = note: `#[warn(unexpected_cfgs)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unexpected `cfg` condition value: `allocator_api` [INFO] [stdout] --> src/lib.rs:44:7 [INFO] [stdout] | [INFO] [stdout] 44 | #[cfg(feature = "allocator_api")] [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: expected values for `feature` are: `default`, `parking_lot`, and `std` [INFO] [stdout] = help: consider adding `allocator_api` as a feature in `Cargo.toml` [INFO] [stdout] = note: see for more information about checking conditional configuration [INFO] [stdout] = note: `#[warn(unexpected_cfgs)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: use of deprecated function `core::mem::uninitialized`: use `mem::MaybeUninit` instead [INFO] [stdout] --> src/os.rs:257:56 [INFO] [stdout] | [INFO] [stdout] 257 | let mut attr: libc::pthread_mutexattr_t = mem::uninitialized(); [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(deprecated)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: use of deprecated function `core::mem::uninitialized`: use `mem::MaybeUninit` instead [INFO] [stdout] --> src/os.rs:257:56 [INFO] [stdout] | [INFO] [stdout] 257 | let mut attr: libc::pthread_mutexattr_t = mem::uninitialized(); [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(deprecated)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: the type `pthread_mutexattr_t` does not permit being left uninitialized [INFO] [stdout] --> src/os.rs:257:51 [INFO] [stdout] | [INFO] [stdout] 257 | let mut attr: libc::pthread_mutexattr_t = mem::uninitialized(); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | this code causes undefined behavior when executed [INFO] [stdout] | help: use `MaybeUninit` instead, and only call `assume_init` after initialization is done [INFO] [stdout] | [INFO] [stdout] = note: integers must be initialized [INFO] [stdout] = note: `#[warn(invalid_value)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 3 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: the type `pthread_mutexattr_t` does not permit being left uninitialized [INFO] [stdout] --> src/os.rs:257:51 [INFO] [stdout] | [INFO] [stdout] 257 | let mut attr: libc::pthread_mutexattr_t = mem::uninitialized(); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | this code causes undefined behavior when executed [INFO] [stdout] | help: use `MaybeUninit` instead, and only call `assume_init` after initialization is done [INFO] [stdout] | [INFO] [stdout] = note: integers must be initialized [INFO] [stdout] = note: `#[warn(invalid_value)]` 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 3.39s [INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: syn v0.13.11 [INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 4` [INFO] running `Command { std: "docker" "inspect" "cc07e93a249a335931dbd85beef1315e79538f30f06e4a4c4c4416f93ea377da", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "cc07e93a249a335931dbd85beef1315e79538f30f06e4a4c4c4416f93ea377da", kill_on_drop: false }` [INFO] [stdout] cc07e93a249a335931dbd85beef1315e79538f30f06e4a4c4c4416f93ea377da