[INFO] fetching crate my-pretty-failure 0.1.2...
[INFO] testing my-pretty-failure-0.1.2 against beta-2022-04-10 for beta-1.61-1
[INFO] extracting crate my-pretty-failure 0.1.2 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate my-pretty-failure 0.1.2 on toolchain beta-2022-04-10
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate my-pretty-failure 0.1.2
[INFO] finished tweaking crates.io crate my-pretty-failure 0.1.2
[INFO] tweaked toml for crates.io crate my-pretty-failure 0.1.2 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a7db1c07cb35f046569b2c10904e4b0fa87ac2434d54317eb65cf7b4f9d997e9
[INFO] running `Command { std: "docker" "start" "-a" "a7db1c07cb35f046569b2c10904e4b0fa87ac2434d54317eb65cf7b4f9d997e9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a7db1c07cb35f046569b2c10904e4b0fa87ac2434d54317eb65cf7b4f9d997e9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a7db1c07cb35f046569b2c10904e4b0fa87ac2434d54317eb65cf7b4f9d997e9", kill_on_drop: false }`
[INFO] [stdout] a7db1c07cb35f046569b2c10904e4b0fa87ac2434d54317eb65cf7b4f9d997e9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 738ca1ab9de0690bcd44785d65b9a87fe2cf6445453681f9d3bdfdd88765e45f
[INFO] running `Command { std: "docker" "start" "-a" "738ca1ab9de0690bcd44785d65b9a87fe2cf6445453681f9d3bdfdd88765e45f", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]    Compiling syn v1.0.91
[INFO] [stderr]    Compiling libc v0.2.123
[INFO] [stderr]    Compiling gimli v0.26.1
[INFO] [stderr]    Compiling adler v1.0.2
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]    Compiling rustc-demangle v0.1.21
[INFO] [stderr]    Compiling miniz_oxide v0.4.4
[INFO] [stderr]    Compiling backtrace v0.3.64
[INFO] [stderr]    Compiling object v0.27.1
[INFO] [stderr]    Compiling addr2line v0.17.0
[INFO] [stderr]    Compiling synstructure v0.12.6
[INFO] [stderr]    Compiling failure v0.1.8
[INFO] [stderr]    Compiling my-pretty-failure v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lib.rs:86:68
[INFO] [stdout]    |
[INFO] [stdout] 86 | pub fn myprettyfailure_option(option: MyPrettyFailurePrint, fail: &Fail) -> String {
[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 2015) 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] 86 - pub fn myprettyfailure_option(option: MyPrettyFailurePrint, fail: &Fail) -> String {
[INFO] [stdout] 86 + pub fn myprettyfailure_option(option: MyPrettyFailurePrint, fail: &dyn Fail) -> String {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:121:31
[INFO] [stdout]     |
[INFO] [stdout] 121 | pub fn myprettyfailure(fail: &Fail) -> String {
[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 <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 121 - pub fn myprettyfailure(fail: &Fail) -> String {
[INFO] [stdout] 121 + pub fn myprettyfailure(fail: &dyn Fail) -> String {
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 19.84s
[INFO] running `Command { std: "docker" "inspect" "738ca1ab9de0690bcd44785d65b9a87fe2cf6445453681f9d3bdfdd88765e45f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "738ca1ab9de0690bcd44785d65b9a87fe2cf6445453681f9d3bdfdd88765e45f", kill_on_drop: false }`
[INFO] [stdout] 738ca1ab9de0690bcd44785d65b9a87fe2cf6445453681f9d3bdfdd88765e45f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 740d77245e51bb4932f15418d885504860bcec0c27a24ca0d48af04f7f8dee3b
[INFO] running `Command { std: "docker" "start" "-a" "740d77245e51bb4932f15418d885504860bcec0c27a24ca0d48af04f7f8dee3b", kill_on_drop: false }`
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lib.rs:86:68
[INFO] [stdout]    |
[INFO] [stdout] 86 | pub fn myprettyfailure_option(option: MyPrettyFailurePrint, fail: &Fail) -> String {
[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 2015) 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] 86 - pub fn myprettyfailure_option(option: MyPrettyFailurePrint, fail: &Fail) -> String {
[INFO] [stdout] 86 + pub fn myprettyfailure_option(option: MyPrettyFailurePrint, fail: &dyn Fail) -> String {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling my-pretty-failure v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:121:31
[INFO] [stdout]     |
[INFO] [stdout] 121 | pub fn myprettyfailure(fail: &Fail) -> String {
[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 <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 121 - pub fn myprettyfailure(fail: &Fail) -> String {
[INFO] [stdout] 121 + pub fn myprettyfailure(fail: &dyn Fail) -> String {
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> tests/0001_myprettyfailure.rs:13:52
[INFO] [stdout]    |
[INFO] [stdout] 13 | impl Fail for MyError { fn cause(&self) -> Option<&Fail> { self.inner.cause()} fn backtrace(&self) -> Option<&Backtrace> {self.inner.back...
[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 2015) 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] 13 - impl Fail for MyError { fn cause(&self) -> Option<&Fail> { self.inner.cause()} fn backtrace(&self) -> Option<&Backtrace> {self.inner.backtrace()}}
[INFO] [stdout] 13 + impl Fail for MyError { fn cause(&self) -> Option<&dyn Fail> { self.inner.cause()} fn backtrace(&self) -> Option<&Backtrace> {self.inner.backtrace()}}
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lib.rs:86:68
[INFO] [stdout]    |
[INFO] [stdout] 86 | pub fn myprettyfailure_option(option: MyPrettyFailurePrint, fail: &Fail) -> String {
[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 2015) 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] 86 - pub fn myprettyfailure_option(option: MyPrettyFailurePrint, fail: &Fail) -> String {
[INFO] [stdout] 86 + pub fn myprettyfailure_option(option: MyPrettyFailurePrint, fail: &dyn Fail) -> String {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:121:31
[INFO] [stdout]     |
[INFO] [stdout] 121 | pub fn myprettyfailure(fail: &Fail) -> String {
[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 <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 121 - pub fn myprettyfailure(fail: &Fail) -> String {
[INFO] [stdout] 121 + pub fn myprettyfailure(fail: &dyn Fail) -> String {
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> examples/helpme.rs:41:32
[INFO] [stdout]    |
[INFO] [stdout] 41 |     fn cause(&self) -> Option<&Fail> {
[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 2015) 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] 41 -     fn cause(&self) -> Option<&Fail> {
[INFO] [stdout] 41 +     fn cause(&self) -> Option<&dyn Fail> {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> examples/helpme.rs:89:32
[INFO] [stdout]    |
[INFO] [stdout] 89 |     fn cause(&self) -> Option<&Fail> {
[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 <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 89 -     fn cause(&self) -> Option<&Fail> {
[INFO] [stdout] 89 +     fn cause(&self) -> Option<&dyn Fail> {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> examples/helpme.rs:137:32
[INFO] [stdout]     |
[INFO] [stdout] 137 |     fn cause(&self) -> Option<&Fail> {
[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 <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 137 -     fn cause(&self) -> Option<&Fail> {
[INFO] [stdout] 137 +     fn cause(&self) -> Option<&dyn Fail> {
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.68s
[INFO] [stderr]   Executable unittests src/lib.rs (/opt/rustwide/target/debug/deps/my_pretty_failure-ddb4b1c4509b19b7)
[INFO] [stderr]   Executable tests/0001_myprettyfailure.rs (/opt/rustwide/target/debug/deps/0001_myprettyfailure-81f6b577e83c229b)
[INFO] running `Command { std: "docker" "inspect" "740d77245e51bb4932f15418d885504860bcec0c27a24ca0d48af04f7f8dee3b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "740d77245e51bb4932f15418d885504860bcec0c27a24ca0d48af04f7f8dee3b", kill_on_drop: false }`
[INFO] [stdout] 740d77245e51bb4932f15418d885504860bcec0c27a24ca0d48af04f7f8dee3b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] dea0bb55240d5fe35b86881ca469cabf356457c40a99dbcec8c7e607015532b1
[INFO] running `Command { std: "docker" "start" "-a" "dea0bb55240d5fe35b86881ca469cabf356457c40a99dbcec8c7e607015532b1", kill_on_drop: false }`
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib.rs:86:68
[INFO] [stderr]    |
[INFO] [stderr] 86 | pub fn myprettyfailure_option(option: MyPrettyFailurePrint, fail: &Fail) -> String {
[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 2015) 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] 86 - pub fn myprettyfailure_option(option: MyPrettyFailurePrint, fail: &Fail) -> String {
[INFO] [stderr] 86 + pub fn myprettyfailure_option(option: MyPrettyFailurePrint, fail: &dyn Fail) -> String {
[INFO] [stderr]    | 
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/lib.rs:121:31
[INFO] [stderr]     |
[INFO] [stderr] 121 | pub fn myprettyfailure(fail: &Fail) -> String {
[INFO] [stderr]     |                               ^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) 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] 121 - pub fn myprettyfailure(fail: &Fail) -> String {
[INFO] [stderr] 121 + pub fn myprettyfailure(fail: &dyn Fail) -> String {
[INFO] [stderr]     | 
[INFO] [stderr] 
[INFO] [stderr] warning: `my-pretty-failure` (lib) generated 2 warnings
[INFO] [stderr] warning: `my-pretty-failure` (lib test) generated 2 warnings (2 duplicates)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> tests/0001_myprettyfailure.rs:13:52
[INFO] [stderr]    |
[INFO] [stderr] 13 | impl Fail for MyError { fn cause(&self) -> Option<&Fail> { self.inner.cause()} fn backtrace(&self) -> Option<&Backtrace> {self.inner.back...
[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 2015) 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] 13 - impl Fail for MyError { fn cause(&self) -> Option<&Fail> { self.inner.cause()} fn backtrace(&self) -> Option<&Backtrace> {self.inner.backtrace()}}
[INFO] [stderr] 13 + impl Fail for MyError { fn cause(&self) -> Option<&dyn Fail> { self.inner.cause()} fn backtrace(&self) -> Option<&Backtrace> {self.inner.backtrace()}}
[INFO] [stderr]    | 
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> examples/helpme.rs:41:32
[INFO] [stderr]    |
[INFO] [stderr] 41 |     fn cause(&self) -> Option<&Fail> {
[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 2015) 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] 41 -     fn cause(&self) -> Option<&Fail> {
[INFO] [stderr] 41 +     fn cause(&self) -> Option<&dyn Fail> {
[INFO] [stderr]    | 
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> examples/helpme.rs:89:32
[INFO] [stderr]    |
[INFO] [stderr] 89 |     fn cause(&self) -> Option<&Fail> {
[INFO] [stderr]    |                                ^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) 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] 89 -     fn cause(&self) -> Option<&Fail> {
[INFO] [stderr] 89 +     fn cause(&self) -> Option<&dyn Fail> {
[INFO] [stderr]    | 
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> examples/helpme.rs:137:32
[INFO] [stderr]     |
[INFO] [stderr] 137 |     fn cause(&self) -> Option<&Fail> {
[INFO] [stderr]     |                                ^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) 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] 137 -     fn cause(&self) -> Option<&Fail> {
[INFO] [stderr] 137 +     fn cause(&self) -> Option<&dyn Fail> {
[INFO] [stderr]     | 
[INFO] [stderr] 
[INFO] [stderr] warning: `my-pretty-failure` (test "0001_myprettyfailure") generated 1 warning
[INFO] [stderr] warning: `my-pretty-failure` (example "helpme") generated 3 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/my_pretty_failure-ddb4b1c4509b19b7)
[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] [stderr]      Running tests/0001_myprettyfailure.rs (/opt/rustwide/target/debug/deps/0001_myprettyfailure-81f6b577e83c229b)
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test myprettyfailure_0001_equal ... ok
[INFO] [stdout] test myprettyfailure_0002_option ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests my-pretty-failure
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test src/lib.rs - (line 13) ... ignored
[INFO] [stdout] test src/lib.rs - (line 35) ... ignored
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 2 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "dea0bb55240d5fe35b86881ca469cabf356457c40a99dbcec8c7e607015532b1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dea0bb55240d5fe35b86881ca469cabf356457c40a99dbcec8c7e607015532b1", kill_on_drop: false }`
[INFO] [stdout] dea0bb55240d5fe35b86881ca469cabf356457c40a99dbcec8c7e607015532b1