[INFO] cloning repository https://github.com/bielr/biotrees-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/bielr/biotrees-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbielr%2Fbiotrees-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbielr%2Fbiotrees-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f832804f9a4d4dc24e1c165cf0362387a4115d60
[INFO] checking bielr/biotrees-rs/f832804f9a4d4dc24e1c165cf0362387a4115d60 against master#cf8a95590a1b768b7711f2631d5b5e3ead464de7 for pr-149389
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbielr%2Fbiotrees-rs" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/bielr/biotrees-rs
[INFO] finished tweaking git repo https://github.com/bielr/biotrees-rs
[INFO] tweaked toml for git repo https://github.com/bielr/biotrees-rs written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/bielr/biotrees-rs on toolchain cf8a95590a1b768b7711f2631d5b5e3ead464de7
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cf8a95590a1b768b7711f2631d5b5e3ead464de7" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cf8a95590a1b768b7711f2631d5b5e3ead464de7" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 38 packages to latest compatible versions
[INFO] [stderr]       Adding cached v0.8.1 (available: v0.56.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cf8a95590a1b768b7711f2631d5b5e3ead464de7" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded autocfg v0.1.8
[INFO] [stderr]   Downloaded cached v0.8.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:94a0c148923f5b2b52a63ef0eeb1882ad339ab61bce784c8077cbe41c61feb6c" "/opt/rustwide/cargo-home/bin/cargo" "+cf8a95590a1b768b7711f2631d5b5e3ead464de7" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 772bc99f52995778d7d1bacf1cfb63c17ff62c1d011e595e3eb52b4e1f373807
[INFO] running `Command { std: "docker" "start" "-a" "772bc99f52995778d7d1bacf1cfb63c17ff62c1d011e595e3eb52b4e1f373807", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "772bc99f52995778d7d1bacf1cfb63c17ff62c1d011e595e3eb52b4e1f373807", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "772bc99f52995778d7d1bacf1cfb63c17ff62c1d011e595e3eb52b4e1f373807", kill_on_drop: false }`
[INFO] [stdout] 772bc99f52995778d7d1bacf1cfb63c17ff62c1d011e595e3eb52b4e1f373807
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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@sha256:94a0c148923f5b2b52a63ef0eeb1882ad339ab61bce784c8077cbe41c61feb6c" "/opt/rustwide/cargo-home/bin/cargo" "+cf8a95590a1b768b7711f2631d5b5e3ead464de7" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 76507e24fac0fc53bcf14c984e11575f9a2d8e08acd072f564cca9cba482a995
[INFO] running `Command { std: "docker" "start" "-a" "76507e24fac0fc53bcf14c984e11575f9a2d8e08acd072f564cca9cba482a995", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024
[INFO] [stderr]    Compiling autocfg v0.1.8
[INFO] [stderr]    Compiling libc v0.2.178
[INFO] [stderr]     Checking scopeguard v0.3.3
[INFO] [stderr]     Checking rand_core v0.3.1
[INFO] [stderr]     Checking rand_jitter v0.1.4
[INFO] [stderr]     Checking maybe-uninit v2.0.0
[INFO] [stderr]    Compiling parking_lot_core v0.4.0
[INFO] [stderr]     Checking lock_api v0.1.5
[INFO] [stderr]     Checking smallvec v0.6.14
[INFO] [stderr]     Checking rand_isaac v0.1.1
[INFO] [stderr]     Checking rand_hc v0.1.0
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]     Checking rand_xorshift v0.1.1
[INFO] [stderr]     Checking rand_os v0.1.3
[INFO] [stderr]     Checking parking_lot v0.7.1
[INFO] [stderr]     Checking once_cell v0.1.8
[INFO] [stderr]     Checking cached v0.8.1
[INFO] [stderr]     Checking biotrees v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stdout]   --> src/phylo/newick.rs:16:35
[INFO] [stdout]    |
[INFO] [stdout] 16 |     fn fmt_newick_leaf_str(&self, &mut fmt::Formatter) -> fmt::Result;
[INFO] [stdout]    |                                   ^^^^^^^^^^^^^^^^^^^ help: try naming the parameter or explicitly ignoring it: `_: &mut fmt::Formatter`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]    = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout]    = note: `#[warn(anonymous_parameters)]` (part of `#[warn(rust_2018_compatibility)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stdout]   --> src/phylo/newick.rs:16:35
[INFO] [stdout]    |
[INFO] [stdout] 16 |     fn fmt_newick_leaf_str(&self, &mut fmt::Formatter) -> fmt::Result;
[INFO] [stdout]    |                                   ^^^^^^^^^^^^^^^^^^^ help: try naming the parameter or explicitly ignoring it: `_: &mut fmt::Formatter`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]    = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout]    = note: `#[warn(anonymous_parameters)]` (part of `#[warn(rust_2018_compatibility)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stdout]   --> src/phylo/newick.rs:20:26
[INFO] [stdout]    |
[INFO] [stdout] 20 |     fn fmt_newick(&self, &mut fmt::Formatter) -> fmt::Result;
[INFO] [stdout]    |                          ^^^^^^^^^^^^^^^^^^^ help: try naming the parameter or explicitly ignoring it: `_: &mut fmt::Formatter`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]    = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/phylo/newick.rs:54:17
[INFO] [stdout]    |
[INFO] [stdout] 54 |                 try!(f.write_str("("));
[INFO] [stdout]    |                 ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/phylo/newick.rs:55:17
[INFO] [stdout]    |
[INFO] [stdout] 55 |                 try!(ts[0].fmt_newick(f));
[INFO] [stdout]    |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stdout]   --> src/phylo/newick.rs:20:26
[INFO] [stdout]    |
[INFO] [stdout] 20 |     fn fmt_newick(&self, &mut fmt::Formatter) -> fmt::Result;
[INFO] [stdout]    |                          ^^^^^^^^^^^^^^^^^^^ help: try naming the parameter or explicitly ignoring it: `_: &mut fmt::Formatter`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]    = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/phylo/newick.rs:58:21
[INFO] [stdout]    |
[INFO] [stdout] 58 |                     try!(f.write_str(","));
[INFO] [stdout]    |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/phylo/newick.rs:59:21
[INFO] [stdout]    |
[INFO] [stdout] 59 |                     try!(t.fmt_newick(f))
[INFO] [stdout]    |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/phylo/newick.rs:54:17
[INFO] [stdout]    |
[INFO] [stdout] 54 |                 try!(f.write_str("("));
[INFO] [stdout]    |                 ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/phylo/newick.rs:55:17
[INFO] [stdout]    |
[INFO] [stdout] 55 |                 try!(ts[0].fmt_newick(f));
[INFO] [stdout]    |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/phylo/newick.rs:58:21
[INFO] [stdout]    |
[INFO] [stdout] 58 |                     try!(f.write_str(","));
[INFO] [stdout]    |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/phylo/newick.rs:59:21
[INFO] [stdout]    |
[INFO] [stdout] 59 |                     try!(t.fmt_newick(f))
[INFO] [stdout]    |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/phylo/mod.rs:141:33
[INFO] [stdout]     |
[INFO] [stdout] 141 |         where F: Fn(&Self, &mut Iterator<Item=R>) -> R,
[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/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]     = note: `#[warn(bare_trait_objects)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 141 |         where F: Fn(&Self, &mut dyn Iterator<Item=R>) -> R,
[INFO] [stdout]     |                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/phylo/mod.rs:141:33
[INFO] [stdout]     |
[INFO] [stdout] 141 |         where F: Fn(&Self, &mut Iterator<Item=R>) -> R,
[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/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]     = note: `#[warn(bare_trait_objects)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 141 |         where F: Fn(&Self, &mut dyn Iterator<Item=R>) -> R,
[INFO] [stdout]     |                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/phylo/mod.rs:127:48
[INFO] [stdout]     |
[INFO] [stdout] 127 |                     let f_ref = &mut f as &mut FnMut(&Self, R, R) -> R;
[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/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 127 |                     let f_ref = &mut f as &mut dyn FnMut(&Self, R, R) -> R;
[INFO] [stdout]     |                                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/phylo/mod.rs:127:48
[INFO] [stdout]     |
[INFO] [stdout] 127 |                     let f_ref = &mut f as &mut FnMut(&Self, R, R) -> R;
[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/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 127 |                     let f_ref = &mut f as &mut dyn FnMut(&Self, R, R) -> R;
[INFO] [stdout]     |                                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/phylo/mod.rs:131:48
[INFO] [stdout]     |
[INFO] [stdout] 131 |                     let f_ref = &mut f as &mut FnMut(&Self, R, R) -> R;
[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/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 131 |                     let f_ref = &mut f as &mut dyn FnMut(&Self, R, R) -> R;
[INFO] [stdout]     |                                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/phylo/mod.rs:147:36
[INFO] [stdout]     |
[INFO] [stdout] 147 |                 let f_ref = &f as &Fn(&Self, &mut Iterator<Item=R>) -> R;
[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/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 147 |                 let f_ref = &f as &dyn Fn(&Self, &mut Iterator<Item=R>) -> R;
[INFO] [stdout]     |                                    +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/phylo/mod.rs:147:51
[INFO] [stdout]     |
[INFO] [stdout] 147 |                 let f_ref = &f as &Fn(&Self, &mut Iterator<Item=R>) -> R;
[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/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 147 |                 let f_ref = &f as &Fn(&Self, &mut dyn Iterator<Item=R>) -> R;
[INFO] [stdout]     |                                                   +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/phylo/mod.rs:131:48
[INFO] [stdout]     |
[INFO] [stdout] 131 |                     let f_ref = &mut f as &mut FnMut(&Self, R, R) -> R;
[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/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 131 |                     let f_ref = &mut f as &mut dyn FnMut(&Self, R, R) -> R;
[INFO] [stdout]     |                                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/phylo/mod.rs:147:36
[INFO] [stdout]     |
[INFO] [stdout] 147 |                 let f_ref = &f as &Fn(&Self, &mut Iterator<Item=R>) -> R;
[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/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 147 |                 let f_ref = &f as &dyn Fn(&Self, &mut Iterator<Item=R>) -> R;
[INFO] [stdout]     |                                    +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/phylo/mod.rs:147:51
[INFO] [stdout]     |
[INFO] [stdout] 147 |                 let f_ref = &f as &Fn(&Self, &mut Iterator<Item=R>) -> R;
[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/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 147 |                 let f_ref = &f as &Fn(&Self, &mut dyn Iterator<Item=R>) -> R;
[INFO] [stdout]     |                                                   +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `sym_desc_half` is never used
[INFO] [stdout]   --> examples/enum_balance.rs:10:4
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn sym_desc_half(t: &Shape) -> u32 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `sym_desc` is never used
[INFO] [stdout]   --> examples/enum_balance.rs:29:4
[INFO] [stdout]    |
[INFO] [stdout] 29 | fn sym_desc(t: &Shape) -> u32 {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `depth_avg` is never used
[INFO] [stdout]   --> examples/enum_balance.rs:48:4
[INFO] [stdout]    |
[INFO] [stdout] 48 | fn depth_avg<T>(t: &Phylo<T>) -> f64 {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `depth_var` is never used
[INFO] [stdout]   --> examples/enum_balance.rs:55:4
[INFO] [stdout]    |
[INFO] [stdout] 55 | fn depth_var<T>(t: &Phylo<T>) -> f64 {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.82s
[INFO] running `Command { std: "docker" "inspect" "76507e24fac0fc53bcf14c984e11575f9a2d8e08acd072f564cca9cba482a995", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "76507e24fac0fc53bcf14c984e11575f9a2d8e08acd072f564cca9cba482a995", kill_on_drop: false }`
[INFO] [stdout] 76507e24fac0fc53bcf14c984e11575f9a2d8e08acd072f564cca9cba482a995
