[INFO] fetching crate monster 0.1.28...
[INFO] checking monster-0.1.28 against 1.55.0 for beta-1.56-3
[INFO] extracting crate monster 0.1.28 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate monster 0.1.28 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate monster 0.1.28
[INFO] finished tweaking crates.io crate monster 0.1.28
[INFO] tweaked toml for crates.io crate monster 0.1.28 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] be18621cd878bdf3bb58e112dab24be1637fad1cd5bf15574d0e4ffae5252fc5
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "be18621cd878bdf3bb58e112dab24be1637fad1cd5bf15574d0e4ffae5252fc5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "be18621cd878bdf3bb58e112dab24be1637fad1cd5bf15574d0e4ffae5252fc5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "be18621cd878bdf3bb58e112dab24be1637fad1cd5bf15574d0e4ffae5252fc5", kill_on_drop: false }`
[INFO] [stdout] be18621cd878bdf3bb58e112dab24be1637fad1cd5bf15574d0e4ffae5252fc5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 41cc15374b46b8979952e58fe41cdc4e2cad5f535697b4f09eddb925f8b4870f
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "41cc15374b46b8979952e58fe41cdc4e2cad5f535697b4f09eddb925f8b4870f", kill_on_drop: false }`
[INFO] [stderr]     Checking monster v0.1.28 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/incubation/fmt/mod.rs:33:5
[INFO] [stdout]    |
[INFO] [stdout] 33 |     try!(write_format(&mut buffer, fmt, args));
[INFO] [stdout]    |     ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/incubation/fmt/mod.rs:30:35
[INFO] [stdout]    |
[INFO] [stdout] 30 | pub fn format(fmt: &str, args: &[&Display]) -> Result<String> {
[INFO] [stdout]    |                                   ^^^^^^^ help: use `dyn`: `dyn Display`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[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 issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/incubation/fmt/mod.rs:39:67
[INFO] [stdout]    |
[INFO] [stdout] 39 | pub fn write_format<W: Write>(buffer: &mut W, fmt: &str, args: &[&Display]) -> Result<()> {
[INFO] [stdout]    |                                                                   ^^^^^^^ help: use `dyn`: `dyn Display`
[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 issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/incubation/fmt/mod.rs:48:24
[INFO] [stdout]    |
[INFO] [stdout] 48 |                 _   => try!(buffer.write_char(ch))
[INFO] [stdout]    |                        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/incubation/fmt/mod.rs:53:21
[INFO] [stdout]    |
[INFO] [stdout] 53 |                     try!(buffer.write_char(ch));
[INFO] [stdout]    |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/incubation/fmt/mod.rs:59:38
[INFO] [stdout]    |
[INFO] [stdout] 59 |                         Some(arg) => try!(write!(buffer, "{}", arg)),
[INFO] [stdout]    |                                      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/incubation/fmt/mod.rs:68:21
[INFO] [stdout]    |
[INFO] [stdout] 68 |                     try!(buffer.write_char(ch));
[INFO] [stdout]    |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated function `std::mem::uninitialized`: use `mem::MaybeUninit` instead
[INFO] [stdout]   --> src/incubation/map_ref_mut.rs:21:25
[INFO] [stdout]    |
[INFO] [stdout] 21 |     let dummy: T = mem::uninitialized();
[INFO] [stdout]    |                         ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]   --> src/incubation/fmt/mod.rs:71:22
[INFO] [stdout]    |
[INFO] [stdout] 71 |                 _ => return return Err(Error::UnexpectedRightBrace) // No standalone right brace allowed
[INFO] [stdout]    |                      ^^^^^^^---------------------------------------
[INFO] [stdout]    |                      |      |
[INFO] [stdout]    |                      |      any code following this expression is unreachable
[INFO] [stdout]    |                      unreachable expression
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/incubation/fmt/error.rs:18:48
[INFO] [stdout]    |
[INFO] [stdout] 18 |         write!(f, "Formatting error: {}", self.description())
[INFO] [stdout]    |                                                ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/incubation/fmt/mod.rs:33:5
[INFO] [stdout]    |
[INFO] [stdout] 33 |     try!(write_format(&mut buffer, fmt, args));
[INFO] [stdout]    |     ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/incubation/fmt/mod.rs:30:35
[INFO] [stdout]    |
[INFO] [stdout] 30 | pub fn format(fmt: &str, args: &[&Display]) -> Result<String> {
[INFO] [stdout]    |                                   ^^^^^^^ help: use `dyn`: `dyn Display`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[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 issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/incubation/fmt/mod.rs:39:67
[INFO] [stdout]    |
[INFO] [stdout] 39 | pub fn write_format<W: Write>(buffer: &mut W, fmt: &str, args: &[&Display]) -> Result<()> {
[INFO] [stdout]    |                                                                   ^^^^^^^ help: use `dyn`: `dyn Display`
[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 issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/incubation/fmt/mod.rs:48:24
[INFO] [stdout]    |
[INFO] [stdout] 48 |                 _   => try!(buffer.write_char(ch))
[INFO] [stdout]    |                        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/incubation/fmt/mod.rs:53:21
[INFO] [stdout]    |
[INFO] [stdout] 53 |                     try!(buffer.write_char(ch));
[INFO] [stdout]    |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/incubation/fmt/mod.rs:59:38
[INFO] [stdout]    |
[INFO] [stdout] 59 |                         Some(arg) => try!(write!(buffer, "{}", arg)),
[INFO] [stdout]    |                                      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/incubation/fmt/mod.rs:68:21
[INFO] [stdout]    |
[INFO] [stdout] 68 |                     try!(buffer.write_char(ch));
[INFO] [stdout]    |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated function `std::mem::uninitialized`: use `mem::MaybeUninit` instead
[INFO] [stdout]   --> src/incubation/map_ref_mut.rs:21:25
[INFO] [stdout]    |
[INFO] [stdout] 21 |     let dummy: T = mem::uninitialized();
[INFO] [stdout]    |                         ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]   --> src/incubation/fmt/mod.rs:71:22
[INFO] [stdout]    |
[INFO] [stdout] 71 |                 _ => return return Err(Error::UnexpectedRightBrace) // No standalone right brace allowed
[INFO] [stdout]    |                      ^^^^^^^---------------------------------------
[INFO] [stdout]    |                      |      |
[INFO] [stdout]    |                      |      any code following this expression is unreachable
[INFO] [stdout]    |                      unreachable expression
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/incubation/fmt/error.rs:18:48
[INFO] [stdout]    |
[INFO] [stdout] 18 |         write!(f, "Formatting error: {}", self.description())
[INFO] [stdout]    |                                                ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.88s
[INFO] running `Command { std: "docker" "inspect" "41cc15374b46b8979952e58fe41cdc4e2cad5f535697b4f09eddb925f8b4870f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "41cc15374b46b8979952e58fe41cdc4e2cad5f535697b4f09eddb925f8b4870f", kill_on_drop: false }`
[INFO] [stdout] 41cc15374b46b8979952e58fe41cdc4e2cad5f535697b4f09eddb925f8b4870f
