[INFO] fetching crate graphic 0.0.1-alpha.2...
[INFO] testing graphic-0.0.1-alpha.2 against beta-2022-02-22 for beta-1.60-1
[INFO] extracting crate graphic 0.0.1-alpha.2 into /workspace/builds/worker-63/source
[INFO] validating manifest of crates.io crate graphic 0.0.1-alpha.2 on toolchain beta-2022-02-22
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate graphic 0.0.1-alpha.2
[INFO] finished tweaking crates.io crate graphic 0.0.1-alpha.2
[INFO] tweaked toml for crates.io crate graphic 0.0.1-alpha.2 written to /workspace/builds/worker-63/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "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-2022-02-22" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-63/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-63/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" "+beta-2022-02-22" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d57a6967b4b98c77564885b4af821fe5e1098ad1803445e44066da91006667cd
[INFO] running `Command { std: "docker" "start" "-a" "d57a6967b4b98c77564885b4af821fe5e1098ad1803445e44066da91006667cd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d57a6967b4b98c77564885b4af821fe5e1098ad1803445e44066da91006667cd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d57a6967b4b98c77564885b4af821fe5e1098ad1803445e44066da91006667cd", kill_on_drop: false }`
[INFO] [stdout] d57a6967b4b98c77564885b4af821fe5e1098ad1803445e44066da91006667cd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-63/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-63/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" "+beta-2022-02-22" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 323ad87e42b046f9df0769376fac201190fa07d3d178f33e76ccb087053a971f
[INFO] running `Command { std: "docker" "start" "-a" "323ad87e42b046f9df0769376fac201190fa07d3d178f33e76ccb087053a971f", kill_on_drop: false }`
[INFO] [stderr]    Compiling graphic v0.0.1-alpha.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:160:37
[INFO] [stdout]     |
[INFO] [stdout] 160 |            pre_children_visit: &mut FnMut(VertexId) -> (), post_children_visit: &mut FnMut(VertexId) -> ()) -> Result {
[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] 160 -            pre_children_visit: &mut FnMut(VertexId) -> (), post_children_visit: &mut FnMut(VertexId) -> ()) -> Result {
[INFO] [stdout] 160 +            pre_children_visit: &mut dyn FnMut(VertexId) -> (), post_children_visit: &mut FnMut(VertexId) -> ()) -> Result {
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:160:86
[INFO] [stdout]     |
[INFO] [stdout] 160 |            pre_children_visit: &mut FnMut(VertexId) -> (), post_children_visit: &mut FnMut(VertexId) -> ()) -> Result {
[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] 160 -            pre_children_visit: &mut FnMut(VertexId) -> (), post_children_visit: &mut FnMut(VertexId) -> ()) -> Result {
[INFO] [stdout] 160 +            pre_children_visit: &mut FnMut(VertexId) -> (), post_children_visit: &mut dyn FnMut(VertexId) -> ()) -> Result {
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/lib.rs:194:24
[INFO] [stdout]     |
[INFO] [stdout] 194 |                 panic!(result)
[INFO] [stdout]     |                        ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_fmt_panics)]` on by default
[INFO] [stdout]     = note: this usage of panic!() is deprecated; it will be a hard error in Rust 2021
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stdout] help: add a "{:?}" format string to use the Debug implementation of `std::result::Result<(), String>`
[INFO] [stdout]     |
[INFO] [stdout] 194 |                 panic!("{:?}", result)
[INFO] [stdout]     |                        +++++++
[INFO] [stdout] help: or use std::panic::panic_any instead
[INFO] [stdout]     |
[INFO] [stdout] 194 |                 std::panic::panic_any(result)
[INFO] [stdout]     |                 ~~~~~~~~~~~~~~~~~~~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.02s
[INFO] running `Command { std: "docker" "inspect" "323ad87e42b046f9df0769376fac201190fa07d3d178f33e76ccb087053a971f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "323ad87e42b046f9df0769376fac201190fa07d3d178f33e76ccb087053a971f", kill_on_drop: false }`
[INFO] [stdout] 323ad87e42b046f9df0769376fac201190fa07d3d178f33e76ccb087053a971f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-63/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-63/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" "+beta-2022-02-22" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 49af4df2578d63cb66b8ddf3ab319a380f80e5921c43ea49b2bec6b26269b345
[INFO] running `Command { std: "docker" "start" "-a" "49af4df2578d63cb66b8ddf3ab319a380f80e5921c43ea49b2bec6b26269b345", kill_on_drop: false }`
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:160:37
[INFO] [stdout]     |
[INFO] [stdout] 160 |            pre_children_visit: &mut FnMut(VertexId) -> (), post_children_visit: &mut FnMut(VertexId) -> ()) -> Result {
[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] 160 -            pre_children_visit: &mut FnMut(VertexId) -> (), post_children_visit: &mut FnMut(VertexId) -> ()) -> Result {
[INFO] [stdout] 160 +            pre_children_visit: &mut dyn FnMut(VertexId) -> (), post_children_visit: &mut FnMut(VertexId) -> ()) -> Result {
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling graphic v0.0.1-alpha.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:160:86
[INFO] [stdout]     |
[INFO] [stdout] 160 |            pre_children_visit: &mut FnMut(VertexId) -> (), post_children_visit: &mut FnMut(VertexId) -> ()) -> Result {
[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] 160 -            pre_children_visit: &mut FnMut(VertexId) -> (), post_children_visit: &mut FnMut(VertexId) -> ()) -> Result {
[INFO] [stdout] 160 +            pre_children_visit: &mut FnMut(VertexId) -> (), post_children_visit: &mut dyn FnMut(VertexId) -> ()) -> Result {
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/lib.rs:194:24
[INFO] [stdout]     |
[INFO] [stdout] 194 |                 panic!(result)
[INFO] [stdout]     |                        ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_fmt_panics)]` on by default
[INFO] [stdout]     = note: this usage of panic!() is deprecated; it will be a hard error in Rust 2021
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stdout] help: add a "{:?}" format string to use the Debug implementation of `std::result::Result<(), String>`
[INFO] [stdout]     |
[INFO] [stdout] 194 |                 panic!("{:?}", result)
[INFO] [stdout]     |                        +++++++
[INFO] [stdout] help: or use std::panic::panic_any instead
[INFO] [stdout]     |
[INFO] [stdout] 194 |                 std::panic::panic_any(result)
[INFO] [stdout]     |                 ~~~~~~~~~~~~~~~~~~~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:160:37
[INFO] [stdout]     |
[INFO] [stdout] 160 |            pre_children_visit: &mut FnMut(VertexId) -> (), post_children_visit: &mut FnMut(VertexId) -> ()) -> Result {
[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] 160 -            pre_children_visit: &mut FnMut(VertexId) -> (), post_children_visit: &mut FnMut(VertexId) -> ()) -> Result {
[INFO] [stdout] 160 +            pre_children_visit: &mut dyn FnMut(VertexId) -> (), post_children_visit: &mut FnMut(VertexId) -> ()) -> Result {
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:160:86
[INFO] [stdout]     |
[INFO] [stdout] 160 |            pre_children_visit: &mut FnMut(VertexId) -> (), post_children_visit: &mut FnMut(VertexId) -> ()) -> Result {
[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] 160 -            pre_children_visit: &mut FnMut(VertexId) -> (), post_children_visit: &mut FnMut(VertexId) -> ()) -> Result {
[INFO] [stdout] 160 +            pre_children_visit: &mut FnMut(VertexId) -> (), post_children_visit: &mut dyn FnMut(VertexId) -> ()) -> Result {
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/lib.rs:194:24
[INFO] [stdout]     |
[INFO] [stdout] 194 |                 panic!(result)
[INFO] [stdout]     |                        ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_fmt_panics)]` on by default
[INFO] [stdout]     = note: this usage of panic!() is deprecated; it will be a hard error in Rust 2021
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stdout] help: add a "{:?}" format string to use the Debug implementation of `std::result::Result<(), String>`
[INFO] [stdout]     |
[INFO] [stdout] 194 |                 panic!("{:?}", result)
[INFO] [stdout]     |                        +++++++
[INFO] [stdout] help: or use std::panic::panic_any instead
[INFO] [stdout]     |
[INFO] [stdout] 194 |                 std::panic::panic_any(result)
[INFO] [stdout]     |                 ~~~~~~~~~~~~~~~~~~~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.21s
[INFO] running `Command { std: "docker" "inspect" "49af4df2578d63cb66b8ddf3ab319a380f80e5921c43ea49b2bec6b26269b345", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "49af4df2578d63cb66b8ddf3ab319a380f80e5921c43ea49b2bec6b26269b345", kill_on_drop: false }`
[INFO] [stdout] 49af4df2578d63cb66b8ddf3ab319a380f80e5921c43ea49b2bec6b26269b345
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-63/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-63/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" "+beta-2022-02-22" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 176bce72555707bf0f9c0a1c63cc659d3c65fcf4eb3c5c2fc10fc49792f28e1c
[INFO] running `Command { std: "docker" "start" "-a" "176bce72555707bf0f9c0a1c63cc659d3c65fcf4eb3c5c2fc10fc49792f28e1c", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/lib.rs:160:37
[INFO] [stderr]     |
[INFO] [stderr] 160 |            pre_children_visit: &mut FnMut(VertexId) -> (), post_children_visit: &mut FnMut(VertexId) -> ()) -> Result {
[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] 160 -            pre_children_visit: &mut FnMut(VertexId) -> (), post_children_visit: &mut FnMut(VertexId) -> ()) -> Result {
[INFO] [stderr] 160 +            pre_children_visit: &mut dyn FnMut(VertexId) -> (), post_children_visit: &mut FnMut(VertexId) -> ()) -> Result {
[INFO] [stderr]     | 
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/lib.rs:160:86
[INFO] [stderr]     |
[INFO] [stderr] 160 |            pre_children_visit: &mut FnMut(VertexId) -> (), post_children_visit: &mut FnMut(VertexId) -> ()) -> Result {
[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] 160 -            pre_children_visit: &mut FnMut(VertexId) -> (), post_children_visit: &mut FnMut(VertexId) -> ()) -> Result {
[INFO] [stderr] 160 +            pre_children_visit: &mut FnMut(VertexId) -> (), post_children_visit: &mut dyn FnMut(VertexId) -> ()) -> Result {
[INFO] [stderr]     | 
[INFO] [stderr] 
[INFO] [stderr] warning: panic message is not a string literal
[INFO] [stderr]    --> src/lib.rs:194:24
[INFO] [stderr]     |
[INFO] [stderr] 194 |                 panic!(result)
[INFO] [stderr]     |                        ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(non_fmt_panics)]` on by default
[INFO] [stderr]     = note: this usage of panic!() is deprecated; it will be a hard error in Rust 2021
[INFO] [stderr]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stderr] help: add a "{:?}" format string to use the Debug implementation of `std::result::Result<(), String>`
[INFO] [stderr]     |
[INFO] [stderr] 194 |                 panic!("{:?}", result)
[INFO] [stderr]     |                        +++++++
[INFO] [stderr] help: or use std::panic::panic_any instead
[INFO] [stderr]     |
[INFO] [stderr] 194 |                 std::panic::panic_any(result)
[INFO] [stderr]     |                 ~~~~~~~~~~~~~~~~~~~~~
[INFO] [stderr] 
[INFO] [stderr] warning: `graphic` (lib) generated 3 warnings
[INFO] [stderr] warning: `graphic` (lib test) generated 3 warnings (3 duplicates)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.49s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/graphic-e0268f2c2b34f1f6)
[INFO] [stdout] 
[INFO] [stdout] running 7 tests
[INFO] [stdout] test tests::bf_iter ... ok
[INFO] [stdout] test tests::df_iter ... ok
[INFO] [stdout] test tests::is_cyclic ... ok
[INFO] [stdout] test tests::is_empty ... ok
[INFO] [stdout] test tests::longest_path ... ok
[INFO] [stdout] test tests::out_and_in_degrees ... ok
[INFO] [stdout] test tests::topological_order ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 7 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests graphic
[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" "176bce72555707bf0f9c0a1c63cc659d3c65fcf4eb3c5c2fc10fc49792f28e1c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "176bce72555707bf0f9c0a1c63cc659d3c65fcf4eb3c5c2fc10fc49792f28e1c", kill_on_drop: false }`
[INFO] [stdout] 176bce72555707bf0f9c0a1c63cc659d3c65fcf4eb3c5c2fc10fc49792f28e1c