[INFO] cloning repository https://github.com/tynr426/future_pro
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/tynr426/future_pro" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftynr426%2Ffuture_pro", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftynr426%2Ffuture_pro'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a60f107071499d786781396011a0e3ff5f51f65b
[INFO] testing tynr426/future_pro against 1.59.0 for beta-1.60-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftynr426%2Ffuture_pro" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/tynr426/future_pro on toolchain 1.59.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/tynr426/future_pro
[INFO] finished tweaking git repo https://github.com/tynr426/future_pro
[INFO] tweaked toml for git repo https://github.com/tynr426/future_pro written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/tynr426/future_pro already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a6344b04dc95092943147df5ee47a3dab395c63c6d2b2eb348ebf199f47ea8e7
[INFO] running `Command { std: "docker" "start" "-a" "a6344b04dc95092943147df5ee47a3dab395c63c6d2b2eb348ebf199f47ea8e7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a6344b04dc95092943147df5ee47a3dab395c63c6d2b2eb348ebf199f47ea8e7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a6344b04dc95092943147df5ee47a3dab395c63c6d2b2eb348ebf199f47ea8e7", kill_on_drop: false }`
[INFO] [stdout] a6344b04dc95092943147df5ee47a3dab395c63c6d2b2eb348ebf199f47ea8e7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ef5add195fdb4a33f1e7436952593f4923f56445edc2392cd34f79390d01991f
[INFO] running `Command { std: "docker" "start" "-a" "ef5add195fdb4a33f1e7436952593f4923f56445edc2392cd34f79390d01991f", kill_on_drop: false }`
[INFO] [stderr]    Compiling futures v0.1.29
[INFO] [stderr]    Compiling scopeguard v1.0.0
[INFO] [stderr]    Compiling smallvec v0.6.10
[INFO] [stderr]    Compiling arrayvec v0.4.12
[INFO] [stderr]    Compiling nodrop v0.1.14
[INFO] [stderr]    Compiling scoped-tls v0.1.2
[INFO] [stderr]    Compiling libc v0.2.65
[INFO] [stderr]    Compiling crossbeam-utils v0.6.6
[INFO] [stderr]    Compiling byteorder v1.3.2
[INFO] [stderr]    Compiling memoffset v0.5.1
[INFO] [stderr]    Compiling parking_lot_core v0.6.2
[INFO] [stderr]    Compiling parking_lot v0.9.0
[INFO] [stderr]    Compiling lock_api v0.3.1
[INFO] [stderr]    Compiling crossbeam-queue v0.1.2
[INFO] [stderr]    Compiling iovec v0.1.4
[INFO] [stderr]    Compiling net2 v0.2.33
[INFO] [stderr]    Compiling num_cpus v1.10.1
[INFO] [stderr]    Compiling crossbeam-epoch v0.7.2
[INFO] [stderr]    Compiling bytes v0.4.12
[INFO] [stderr]    Compiling mio v0.6.19
[INFO] [stderr]    Compiling crossbeam-deque v0.7.1
[INFO] [stderr]    Compiling tokio-executor v0.1.8
[INFO] [stderr]    Compiling tokio-sync v0.1.7
[INFO] [stderr]    Compiling tokio-io v0.1.12
[INFO] [stderr]    Compiling tokio-threadpool v0.1.16
[INFO] [stderr]    Compiling tokio-current-thread v0.1.6
[INFO] [stderr]    Compiling tokio-timer v0.2.11
[INFO] [stderr]    Compiling tokio-codec v0.1.1
[INFO] [stderr]    Compiling tokio-reactor v0.1.10
[INFO] [stderr]    Compiling mio-uds v0.6.7
[INFO] [stderr]    Compiling tokio-fs v0.1.6
[INFO] [stderr]    Compiling tokio-uds v0.2.5
[INFO] [stderr]    Compiling tokio-tcp v0.1.3
[INFO] [stderr]    Compiling tokio-udp v0.1.5
[INFO] [stderr]    Compiling tokio v0.1.22
[INFO] [stderr]    Compiling tokio-core v0.1.17
[INFO] [stderr]    Compiling future_pro v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:42:43
[INFO] [stdout]    |
[INFO] [stdout] 42 | fn my_fut_squared2(i:u32)->Result<u32,Box<Error+'static>> {
[INFO] [stdout]    |                                           ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 42 - fn my_fut_squared2(i:u32)->Result<u32,Box<Error+'static>> {
[INFO] [stdout] 42 + fn my_fut_squared2(i:u32)->Result<u32,Box<dyn Error+'static>> {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/error_defined.rs:14:32
[INFO] [stdout]    |
[INFO] [stdout] 14 |     fn cause(&self) -> Option<&error::Error>{
[INFO] [stdout]    |                                ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 14 -     fn cause(&self) -> Option<&error::Error>{
[INFO] [stdout] 14 +     fn cause(&self) -> Option<&dyn error::Error>{
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/error_defined.rs:29:30
[INFO] [stdout]    |
[INFO] [stdout] 29 |     fn cause(&self)->Option<&error::Error>{
[INFO] [stdout]    |                              ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 29 -     fn cause(&self)->Option<&error::Error>{
[INFO] [stdout] 29 +     fn cause(&self)->Option<&dyn error::Error>{
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:36:49
[INFO] [stdout]    |
[INFO] [stdout] 36 | fn my_fut()->impl Future<Item = u32, Error =Box<Error+'static>> {
[INFO] [stdout]    |                                                 ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 36 - fn my_fut()->impl Future<Item = u32, Error =Box<Error+'static>> {
[INFO] [stdout] 36 + fn my_fut()->impl Future<Item = u32, Error =Box<dyn Error+'static>> {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:39:62
[INFO] [stdout]    |
[INFO] [stdout] 39 | fn my_fut_squared(i:u32)->impl Future<Item = u32, Error =Box<Error+'static>> {
[INFO] [stdout]    |                                                              ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 39 - fn my_fut_squared(i:u32)->impl Future<Item = u32, Error =Box<Error+'static>> {
[INFO] [stdout] 39 + fn my_fut_squared(i:u32)->impl Future<Item = u32, Error =Box<dyn Error+'static>> {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:45:75
[INFO] [stdout]    |
[INFO] [stdout] 45 | fn fut_generic_own<A> (a1: A, a2: A) -> impl Future<Item = A, Error = Box<Error+'static>> 
[INFO] [stdout]    |                                                                           ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 45 - fn fut_generic_own<A> (a1: A, a2: A) -> impl Future<Item = A, Error = Box<Error+'static>> 
[INFO] [stdout] 45 + fn fut_generic_own<A> (a1: A, a2: A) -> impl Future<Item = A, Error = Box<dyn Error+'static>> 
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]   --> src/main.rs:30:41
[INFO] [stdout]    |
[INFO] [stdout] 30 |     let future2= fut_error_a().map_err(|e|{
[INFO] [stdout]    |                                         ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.90s
[INFO] running `Command { std: "docker" "inspect" "ef5add195fdb4a33f1e7436952593f4923f56445edc2392cd34f79390d01991f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ef5add195fdb4a33f1e7436952593f4923f56445edc2392cd34f79390d01991f", kill_on_drop: false }`
[INFO] [stdout] ef5add195fdb4a33f1e7436952593f4923f56445edc2392cd34f79390d01991f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 88a5b21fd4428452a7bb2b01f85d0c21c31664d09b05abb0cafb5ecd9b099f9c
[INFO] running `Command { std: "docker" "start" "-a" "88a5b21fd4428452a7bb2b01f85d0c21c31664d09b05abb0cafb5ecd9b099f9c", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling future_pro v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:42:43
[INFO] [stdout]    |
[INFO] [stdout] 42 | fn my_fut_squared2(i:u32)->Result<u32,Box<Error+'static>> {
[INFO] [stdout]    |                                           ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 42 - fn my_fut_squared2(i:u32)->Result<u32,Box<Error+'static>> {
[INFO] [stdout] 42 + fn my_fut_squared2(i:u32)->Result<u32,Box<dyn Error+'static>> {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/error_defined.rs:14:32
[INFO] [stdout]    |
[INFO] [stdout] 14 |     fn cause(&self) -> Option<&error::Error>{
[INFO] [stdout]    |                                ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 14 -     fn cause(&self) -> Option<&error::Error>{
[INFO] [stdout] 14 +     fn cause(&self) -> Option<&dyn error::Error>{
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/error_defined.rs:29:30
[INFO] [stdout]    |
[INFO] [stdout] 29 |     fn cause(&self)->Option<&error::Error>{
[INFO] [stdout]    |                              ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 29 -     fn cause(&self)->Option<&error::Error>{
[INFO] [stdout] 29 +     fn cause(&self)->Option<&dyn error::Error>{
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:36:49
[INFO] [stdout]    |
[INFO] [stdout] 36 | fn my_fut()->impl Future<Item = u32, Error =Box<Error+'static>> {
[INFO] [stdout]    |                                                 ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 36 - fn my_fut()->impl Future<Item = u32, Error =Box<Error+'static>> {
[INFO] [stdout] 36 + fn my_fut()->impl Future<Item = u32, Error =Box<dyn Error+'static>> {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:39:62
[INFO] [stdout]    |
[INFO] [stdout] 39 | fn my_fut_squared(i:u32)->impl Future<Item = u32, Error =Box<Error+'static>> {
[INFO] [stdout]    |                                                              ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 39 - fn my_fut_squared(i:u32)->impl Future<Item = u32, Error =Box<Error+'static>> {
[INFO] [stdout] 39 + fn my_fut_squared(i:u32)->impl Future<Item = u32, Error =Box<dyn Error+'static>> {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:45:75
[INFO] [stdout]    |
[INFO] [stdout] 45 | fn fut_generic_own<A> (a1: A, a2: A) -> impl Future<Item = A, Error = Box<Error+'static>> 
[INFO] [stdout]    |                                                                           ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 45 - fn fut_generic_own<A> (a1: A, a2: A) -> impl Future<Item = A, Error = Box<Error+'static>> 
[INFO] [stdout] 45 + fn fut_generic_own<A> (a1: A, a2: A) -> impl Future<Item = A, Error = Box<dyn Error+'static>> 
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]   --> src/main.rs:30:41
[INFO] [stdout]    |
[INFO] [stdout] 30 |     let future2= fut_error_a().map_err(|e|{
[INFO] [stdout]    |                                         ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.41s
[INFO] running `Command { std: "docker" "inspect" "88a5b21fd4428452a7bb2b01f85d0c21c31664d09b05abb0cafb5ecd9b099f9c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "88a5b21fd4428452a7bb2b01f85d0c21c31664d09b05abb0cafb5ecd9b099f9c", kill_on_drop: false }`
[INFO] [stdout] 88a5b21fd4428452a7bb2b01f85d0c21c31664d09b05abb0cafb5ecd9b099f9c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 364364ba78faedb9a25d96d12fa1c5691cc0c1bf46d149157b294f9e8c5d49e1
[INFO] running `Command { std: "docker" "start" "-a" "364364ba78faedb9a25d96d12fa1c5691cc0c1bf46d149157b294f9e8c5d49e1", kill_on_drop: false }`
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/main.rs:42:43
[INFO] [stderr]    |
[INFO] [stderr] 42 | fn my_fut_squared2(i:u32)->Result<u32,Box<Error+'static>> {
[INFO] [stderr]    |                                           ^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]    |
[INFO] [stderr] 42 - fn my_fut_squared2(i:u32)->Result<u32,Box<Error+'static>> {
[INFO] [stderr] 42 + fn my_fut_squared2(i:u32)->Result<u32,Box<dyn Error+'static>> {
[INFO] [stderr]    | 
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/error_defined.rs:14:32
[INFO] [stderr]    |
[INFO] [stderr] 14 |     fn cause(&self) -> Option<&error::Error>{
[INFO] [stderr]    |                                ^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]    |
[INFO] [stderr] 14 -     fn cause(&self) -> Option<&error::Error>{
[INFO] [stderr] 14 +     fn cause(&self) -> Option<&dyn error::Error>{
[INFO] [stderr]    | 
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/error_defined.rs:29:30
[INFO] [stderr]    |
[INFO] [stderr] 29 |     fn cause(&self)->Option<&error::Error>{
[INFO] [stderr]    |                              ^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]    |
[INFO] [stderr] 29 -     fn cause(&self)->Option<&error::Error>{
[INFO] [stderr] 29 +     fn cause(&self)->Option<&dyn error::Error>{
[INFO] [stderr]    | 
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/main.rs:36:49
[INFO] [stderr]    |
[INFO] [stderr] 36 | fn my_fut()->impl Future<Item = u32, Error =Box<Error+'static>> {
[INFO] [stderr]    |                                                 ^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]    |
[INFO] [stderr] 36 - fn my_fut()->impl Future<Item = u32, Error =Box<Error+'static>> {
[INFO] [stderr] 36 + fn my_fut()->impl Future<Item = u32, Error =Box<dyn Error+'static>> {
[INFO] [stderr]    | 
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/main.rs:39:62
[INFO] [stderr]    |
[INFO] [stderr] 39 | fn my_fut_squared(i:u32)->impl Future<Item = u32, Error =Box<Error+'static>> {
[INFO] [stderr]    |                                                              ^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]    |
[INFO] [stderr] 39 - fn my_fut_squared(i:u32)->impl Future<Item = u32, Error =Box<Error+'static>> {
[INFO] [stderr] 39 + fn my_fut_squared(i:u32)->impl Future<Item = u32, Error =Box<dyn Error+'static>> {
[INFO] [stderr]    | 
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/main.rs:45:75
[INFO] [stderr]    |
[INFO] [stderr] 45 | fn fut_generic_own<A> (a1: A, a2: A) -> impl Future<Item = A, Error = Box<Error+'static>> 
[INFO] [stderr]    |                                                                           ^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]    |
[INFO] [stderr] 45 - fn fut_generic_own<A> (a1: A, a2: A) -> impl Future<Item = A, Error = Box<Error+'static>> 
[INFO] [stderr] 45 + fn fut_generic_own<A> (a1: A, a2: A) -> impl Future<Item = A, Error = Box<dyn Error+'static>> 
[INFO] [stderr]    | 
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `e`
[INFO] [stderr]   --> src/main.rs:30:41
[INFO] [stderr]    |
[INFO] [stderr] 30 |     let future2= fut_error_a().map_err(|e|{
[INFO] [stderr]    |                                         ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `future_pro` (bin "future_pro" test) generated 7 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/future_pro-37475d76be7846b7)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "364364ba78faedb9a25d96d12fa1c5691cc0c1bf46d149157b294f9e8c5d49e1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "364364ba78faedb9a25d96d12fa1c5691cc0c1bf46d149157b294f9e8c5d49e1", kill_on_drop: false }`
[INFO] [stdout] 364364ba78faedb9a25d96d12fa1c5691cc0c1bf46d149157b294f9e8c5d49e1