[INFO] cloning repository https://github.com/ming535/floppy
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ming535/floppy" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fming535%2Ffloppy", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fming535%2Ffloppy'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b60c28c1fe42b8dcfca7cda5c5accbd0a7d4584d
[INFO] testing ming535/floppy against 1.90.0 for beta-1.91-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fming535%2Ffloppy" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] removed /workspace/builds/worker-6-tc1/source/rust-toolchain.toml
[INFO] started tweaking git repo https://github.com/ming535/floppy
[INFO] finished tweaking git repo https://github.com/ming535/floppy
[INFO] tweaked toml for git repo https://github.com/ming535/floppy written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/ming535/floppy on toolchain 1.90.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/ming535/floppy already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded paste v1.0.11
[INFO] [stderr]   Downloaded async-trait v0.1.58
[INFO] [stderr]   Downloaded quote v1.0.20
[INFO] [stderr]   Downloaded proc-macro2 v1.0.40
[INFO] [stderr]   Downloaded proptest v1.0.0
[INFO] [stderr]   Downloaded sqlparser v0.18.0
[INFO] [stderr]   Downloaded rust_decimal v1.26.1
[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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 447ba993cae9d2dd5432be86790b67ee550348cda63f6b95c7651bb195d7ec34
[INFO] running `Command { std: "docker" "start" "-a" "447ba993cae9d2dd5432be86790b67ee550348cda63f6b95c7651bb195d7ec34", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "447ba993cae9d2dd5432be86790b67ee550348cda63f6b95c7651bb195d7ec34", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "447ba993cae9d2dd5432be86790b67ee550348cda63f6b95c7651bb195d7ec34", kill_on_drop: false }`
[INFO] [stdout] 447ba993cae9d2dd5432be86790b67ee550348cda63f6b95c7651bb195d7ec34
[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=warn" "-e" "RUSTDOCFLAGS=--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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c1865e0bc76cba7c913fe201cf9e3129fa90a9b28fdf5e322a2a35ef99057484
[INFO] running `Command { std: "docker" "start" "-a" "c1865e0bc76cba7c913fe201cf9e3129fa90a9b28fdf5e322a2a35ef99057484", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.40
[INFO] [stderr]    Compiling quote v1.0.20
[INFO] [stderr]    Compiling unicode-ident v1.0.1
[INFO] [stderr]    Compiling syn v1.0.98
[INFO] [stderr]    Compiling libc v0.2.137
[INFO] [stderr]    Compiling serde_derive v1.0.137
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]    Compiling smallvec v1.10.0
[INFO] [stderr]    Compiling serde v1.0.137
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling futures-io v0.3.25
[INFO] [stderr]    Compiling tokio v1.21.2
[INFO] [stderr]    Compiling rust_decimal v1.26.1
[INFO] [stderr]    Compiling paste v1.0.11
[INFO] [stderr]    Compiling async-trait v0.1.58
[INFO] [stderr]    Compiling arrayvec v0.7.2
[INFO] [stderr]    Compiling hashbrown v0.12.3
[INFO] [stderr]    Compiling bytes v1.2.1
[INFO] [stderr]    Compiling parking_lot_core v0.9.4
[INFO] [stderr]    Compiling mio v0.8.5
[INFO] [stderr]    Compiling socket2 v0.4.7
[INFO] [stderr]    Compiling signal-hook-registry v1.4.0
[INFO] [stderr]    Compiling num_cpus v1.14.0
[INFO] [stderr]    Compiling parking_lot v0.12.1
[INFO] [stderr]    Compiling dashmap v5.4.0
[INFO] [stderr]    Compiling futures-macro v0.3.25
[INFO] [stderr]    Compiling tokio-macros v1.8.0
[INFO] [stderr]    Compiling futures-util v0.3.25
[INFO] [stderr]    Compiling futures-executor v0.3.25
[INFO] [stderr]    Compiling futures v0.3.25
[INFO] [stderr]    Compiling sqlparser v0.18.0
[INFO] [stderr]    Compiling floppy v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | / #![feature(
[INFO] [stdout] 2 | |     type_alias_impl_trait,
[INFO] [stdout] 3 | |     io_error_more,
[INFO] [stdout] 4 | |     anonymous_lifetime_in_impl_trait,
[INFO] [stdout] 5 | |     int_roundings,
[INFO] [stdout] 6 | |     iter_order_by
[INFO] [stdout] 7 | | )]
[INFO] [stdout]   | |__^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: `impl Trait` in associated types is unstable
[INFO] [stdout]   --> src/env/sim.rs:90:24
[INFO] [stdout]    |
[INFO] [stdout] 90 |     type WriteAt<'a> = impl Future<Output = Result<usize>> + 'a;
[INFO] [stdout]    |                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #63063 <https://github.com/rust-lang/rust/issues/63063> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: `impl Trait` in associated types is unstable
[INFO] [stdout]    --> src/env/sim.rs:119:23
[INFO] [stdout]     |
[INFO] [stdout] 119 |     type ReadAt<'a> = impl Future<Output = Result<usize>> + 'a;
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #63063 <https://github.com/rust-lang/rust/issues/63063> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: `impl Trait` in associated types is unstable
[INFO] [stdout]    --> src/env/stdenv.rs:118:24
[INFO] [stdout]     |
[INFO] [stdout] 118 |     type WriteAt<'a> = impl Future<Output = Result<usize>> + 'a;
[INFO] [stdout]     |                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #63063 <https://github.com/rust-lang/rust/issues/63063> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: `impl Trait` in associated types is unstable
[INFO] [stdout]    --> src/env/stdenv.rs:136:23
[INFO] [stdout]     |
[INFO] [stdout] 136 |     type ReadAt<'a> = impl Future<Output = Result<usize>> + 'a;
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #63063 <https://github.com/rust-lang/rust/issues/63063> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: `impl Trait` in associated types is unstable
[INFO] [stdout]    --> src/env.rs:117:28
[INFO] [stdout]     |
[INFO] [stdout] 117 |     type ReadExactAt<'a> = impl Future<Output = Result<()>> + 'a where Self: 'a;
[INFO] [stdout]     |                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #63063 <https://github.com/rust-lang/rust/issues/63063> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: `impl Trait` in associated types is unstable
[INFO] [stdout]    --> src/env.rs:185:30
[INFO] [stdout]     |
[INFO] [stdout] 185 |     type WriteExactAt<'a>  = impl Future<Output = Result<()>> + 'a where Self: 'a;
[INFO] [stdout]     |                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #63063 <https://github.com/rust-lang/rust/issues/63063> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::sync::Arc`
[INFO] [stdout]   --> src/dc2/bufmgr.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use std::sync::Arc;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `PageOffset`
[INFO] [stdout]  --> src/dc2/node.rs:5:35
[INFO] [stdout]   |
[INFO] [stdout] 5 | use crate::dc2::lp::{LinePointer, PageOffset};
[INFO] [stdout]   |                                   ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `FloppyError`
[INFO] [stdout]  --> src/dc2/tree.rs:2:13
[INFO] [stdout]   |
[INFO] [stdout] 2 |     error::{FloppyError, Result},
[INFO] [stdout]   |             ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `key`
[INFO] [stdout]   --> src/dc2/tree.rs:33:45
[INFO] [stdout]    |
[INFO] [stdout] 33 |     pub async fn get<K: AsRef<[u8]>>(&self, key: K) -> Result<Option<IVec>> {
[INFO] [stdout]    |                                             ^^^ help: if this is intentional, prefix it with an underscore: `_key`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `stack`
[INFO] [stdout]   --> src/dc2/tree.rs:48:30
[INFO] [stdout]    |
[INFO] [stdout] 48 |         let (mut lock_guard, stack) = self.find_leaf(key.as_ref()).await?;
[INFO] [stdout]    |                              ^^^^^ help: if this is intentional, prefix it with an underscore: `_stack`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0554, E0658.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `floppy` (lib) due to 7 previous errors; 5 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "c1865e0bc76cba7c913fe201cf9e3129fa90a9b28fdf5e322a2a35ef99057484", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c1865e0bc76cba7c913fe201cf9e3129fa90a9b28fdf5e322a2a35ef99057484", kill_on_drop: false }`
[INFO] [stdout] c1865e0bc76cba7c913fe201cf9e3129fa90a9b28fdf5e322a2a35ef99057484
