[INFO] cloning repository https://github.com/TymurKhr/smt
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/TymurKhr/smt" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTymurKhr%2Fsmt", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTymurKhr%2Fsmt'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] df8ee8735645059e68487c81ed521bd65401ae1d
[INFO] testing TymurKhr/smt against beta-2022-04-10 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTymurKhr%2Fsmt" "/workspace/builds/worker-35/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-35/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/TymurKhr/smt 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 git repo https://github.com/TymurKhr/smt
[INFO] finished tweaking git repo https://github.com/TymurKhr/smt
[INFO] tweaked toml for git repo https://github.com/TymurKhr/smt written to /workspace/builds/worker-35/source/Cargo.toml
[INFO] crate git repo https://github.com/TymurKhr/smt already has a lockfile, it will not be regenerated
[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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-35/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-35/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] 4faa4af4e8f898bfed666cbcb24681b4ee43af8f667234372c1f8ab61f2f02a6
[INFO] running `Command { std: "docker" "start" "-a" "4faa4af4e8f898bfed666cbcb24681b4ee43af8f667234372c1f8ab61f2f02a6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4faa4af4e8f898bfed666cbcb24681b4ee43af8f667234372c1f8ab61f2f02a6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4faa4af4e8f898bfed666cbcb24681b4ee43af8f667234372c1f8ab61f2f02a6", kill_on_drop: false }`
[INFO] [stdout] 4faa4af4e8f898bfed666cbcb24681b4ee43af8f667234372c1f8ab61f2f02a6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-35/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-35/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] 8e15c5f9fe76a080eccded23a3211a3eb73054282aa4fba0b34a082a7bcf18f8
[INFO] running `Command { std: "docker" "start" "-a" "8e15c5f9fe76a080eccded23a3211a3eb73054282aa4fba0b34a082a7bcf18f8", kill_on_drop: false }`
[INFO] [stderr]    Compiling cc v1.0.35
[INFO] [stderr]    Compiling libc v0.2.51
[INFO] [stderr]    Compiling byteorder v1.3.1
[INFO] [stderr]    Compiling untrusted v0.6.2
[INFO] [stderr]    Compiling spin v0.5.0
[INFO] [stderr]    Compiling lazy_static v1.3.0
[INFO] [stderr]    Compiling rustc-serialize v0.3.24
[INFO] [stderr]    Compiling ring v0.14.6
[INFO] [stderr]    Compiling smt v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/tree.rs:69:15
[INFO] [stdout]    |
[INFO] [stdout] 69 |     hash: Box<Fn(&[u8]) -> Vec<u8>>,
[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] 69 -     hash: Box<Fn(&[u8]) -> Vec<u8>>,
[INFO] [stdout] 69 +     hash: Box<dyn Fn(&[u8]) -> Vec<u8>>,
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/tree.rs:216:30
[INFO] [stdout]     |
[INFO] [stdout] 216 | fn _interior_hash(hash: &Box<Fn(&[u8]) -> Vec<u8>>, left: &[u8], right: &[u8], height: u64, base: &[u8]) -> Vec<u8> {
[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] 216 - fn _interior_hash(hash: &Box<Fn(&[u8]) -> Vec<u8>>, left: &[u8], right: &[u8], height: u64, base: &[u8]) -> Vec<u8> {
[INFO] [stdout] 216 + fn _interior_hash(hash: &Box<dyn Fn(&[u8]) -> Vec<u8>>, left: &[u8], right: &[u8], height: u64, base: &[u8]) -> Vec<u8> {
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/tree.rs:229:26
[INFO] [stdout]     |
[INFO] [stdout] 229 | fn _leaf_hash(hash: &Box<Fn(&[u8]) -> Vec<u8>>, c: &[u8], a: &[u8], base: &[u8]) -> Vec<u8> {
[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] 229 - fn _leaf_hash(hash: &Box<Fn(&[u8]) -> Vec<u8>>, c: &[u8], a: &[u8], base: &[u8]) -> Vec<u8> {
[INFO] [stdout] 229 + fn _leaf_hash(hash: &Box<dyn Fn(&[u8]) -> Vec<u8>>, c: &[u8], a: &[u8], base: &[u8]) -> Vec<u8> {
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/tree.rs:73:38
[INFO] [stdout]    |
[INFO] [stdout] 73 |     pub fn new(c: Vec<u8>, hash: Box<Fn(&[u8]) -> Vec<u8>>) -> SMT {
[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] 73 -     pub fn new(c: Vec<u8>, hash: Box<Fn(&[u8]) -> Vec<u8>>) -> SMT {
[INFO] [stdout] 73 +     pub fn new(c: Vec<u8>, hash: Box<dyn Fn(&[u8]) -> Vec<u8>>) -> SMT {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `split`
[INFO] [stdout]   --> src/cache.rs:56:83
[INFO] [stdout]    |
[INFO] [stdout] 56 |     fn hash_cache(&mut self, left: &[u8], right: &[u8], height: u64, base: &[u8], split: &[u8],
[INFO] [stdout]    |                                                                                   ^^^^^ help: if this is intentional, prefix it with an underscore: `_split`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `rustc_serialize::hex::ToHex`
[INFO] [stdout]  --> src/main.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use rustc_serialize::hex::ToHex;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::HashMap`
[INFO] [stdout]  --> src/main.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::collections::HashMap;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> src/main.rs:9:65
[INFO] [stdout]   |
[INFO] [stdout] 9 | fn digest_adapter(algorithm: &'static digest::Algorithm) -> Box<Fn(&[u8])->Vec<u8>>{
[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] 9 - fn digest_adapter(algorithm: &'static digest::Algorithm) -> Box<Fn(&[u8])->Vec<u8>>{
[INFO] [stdout] 9 + fn digest_adapter(algorithm: &'static digest::Algorithm) -> Box<dyn Fn(&[u8])->Vec<u8>>{
[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 7.59s
[INFO] running `Command { std: "docker" "inspect" "8e15c5f9fe76a080eccded23a3211a3eb73054282aa4fba0b34a082a7bcf18f8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8e15c5f9fe76a080eccded23a3211a3eb73054282aa4fba0b34a082a7bcf18f8", kill_on_drop: false }`
[INFO] [stdout] 8e15c5f9fe76a080eccded23a3211a3eb73054282aa4fba0b34a082a7bcf18f8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-35/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-35/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] 98590ea009f54a70100b487b017ac8b00feca9655dc70407b9c9a660c30c58cc
[INFO] running `Command { std: "docker" "start" "-a" "98590ea009f54a70100b487b017ac8b00feca9655dc70407b9c9a660c30c58cc", kill_on_drop: false }`
[INFO] [stderr]    Compiling smt v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/tree.rs:69:15
[INFO] [stdout]    |
[INFO] [stdout] 69 |     hash: Box<Fn(&[u8]) -> Vec<u8>>,
[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] 69 -     hash: Box<Fn(&[u8]) -> Vec<u8>>,
[INFO] [stdout] 69 +     hash: Box<dyn Fn(&[u8]) -> Vec<u8>>,
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/tree.rs:216:30
[INFO] [stdout]     |
[INFO] [stdout] 216 | fn _interior_hash(hash: &Box<Fn(&[u8]) -> Vec<u8>>, left: &[u8], right: &[u8], height: u64, base: &[u8]) -> Vec<u8> {
[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] 216 - fn _interior_hash(hash: &Box<Fn(&[u8]) -> Vec<u8>>, left: &[u8], right: &[u8], height: u64, base: &[u8]) -> Vec<u8> {
[INFO] [stdout] 216 + fn _interior_hash(hash: &Box<dyn Fn(&[u8]) -> Vec<u8>>, left: &[u8], right: &[u8], height: u64, base: &[u8]) -> Vec<u8> {
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/tree.rs:229:26
[INFO] [stdout]     |
[INFO] [stdout] 229 | fn _leaf_hash(hash: &Box<Fn(&[u8]) -> Vec<u8>>, c: &[u8], a: &[u8], base: &[u8]) -> Vec<u8> {
[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] 229 - fn _leaf_hash(hash: &Box<Fn(&[u8]) -> Vec<u8>>, c: &[u8], a: &[u8], base: &[u8]) -> Vec<u8> {
[INFO] [stdout] 229 + fn _leaf_hash(hash: &Box<dyn Fn(&[u8]) -> Vec<u8>>, c: &[u8], a: &[u8], base: &[u8]) -> Vec<u8> {
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/tree.rs:73:38
[INFO] [stdout]    |
[INFO] [stdout] 73 |     pub fn new(c: Vec<u8>, hash: Box<Fn(&[u8]) -> Vec<u8>>) -> SMT {
[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] 73 -     pub fn new(c: Vec<u8>, hash: Box<Fn(&[u8]) -> Vec<u8>>) -> SMT {
[INFO] [stdout] 73 +     pub fn new(c: Vec<u8>, hash: Box<dyn Fn(&[u8]) -> Vec<u8>>) -> SMT {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `split`
[INFO] [stdout]   --> src/cache.rs:56:83
[INFO] [stdout]    |
[INFO] [stdout] 56 |     fn hash_cache(&mut self, left: &[u8], right: &[u8], height: u64, base: &[u8], split: &[u8],
[INFO] [stdout]    |                                                                                   ^^^^^ help: if this is intentional, prefix it with an underscore: `_split`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `rustc_serialize::hex::ToHex`
[INFO] [stdout]  --> src/main.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use rustc_serialize::hex::ToHex;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::HashMap`
[INFO] [stdout]  --> src/main.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::collections::HashMap;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> src/main.rs:9:65
[INFO] [stdout]   |
[INFO] [stdout] 9 | fn digest_adapter(algorithm: &'static digest::Algorithm) -> Box<Fn(&[u8])->Vec<u8>>{
[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] 9 - fn digest_adapter(algorithm: &'static digest::Algorithm) -> Box<Fn(&[u8])->Vec<u8>>{
[INFO] [stdout] 9 + fn digest_adapter(algorithm: &'static digest::Algorithm) -> Box<dyn Fn(&[u8])->Vec<u8>>{
[INFO] [stdout]   | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/tree.rs:69:15
[INFO] [stdout]    |
[INFO] [stdout] 69 |     hash: Box<Fn(&[u8]) -> Vec<u8>>,
[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] 69 -     hash: Box<Fn(&[u8]) -> Vec<u8>>,
[INFO] [stdout] 69 +     hash: Box<dyn Fn(&[u8]) -> Vec<u8>>,
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/tree.rs:216:30
[INFO] [stdout]     |
[INFO] [stdout] 216 | fn _interior_hash(hash: &Box<Fn(&[u8]) -> Vec<u8>>, left: &[u8], right: &[u8], height: u64, base: &[u8]) -> Vec<u8> {
[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] 216 - fn _interior_hash(hash: &Box<Fn(&[u8]) -> Vec<u8>>, left: &[u8], right: &[u8], height: u64, base: &[u8]) -> Vec<u8> {
[INFO] [stdout] 216 + fn _interior_hash(hash: &Box<dyn Fn(&[u8]) -> Vec<u8>>, left: &[u8], right: &[u8], height: u64, base: &[u8]) -> Vec<u8> {
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/tree.rs:229:26
[INFO] [stdout]     |
[INFO] [stdout] 229 | fn _leaf_hash(hash: &Box<Fn(&[u8]) -> Vec<u8>>, c: &[u8], a: &[u8], base: &[u8]) -> Vec<u8> {
[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] 229 - fn _leaf_hash(hash: &Box<Fn(&[u8]) -> Vec<u8>>, c: &[u8], a: &[u8], base: &[u8]) -> Vec<u8> {
[INFO] [stdout] 229 + fn _leaf_hash(hash: &Box<dyn Fn(&[u8]) -> Vec<u8>>, c: &[u8], a: &[u8], base: &[u8]) -> Vec<u8> {
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/tree.rs:73:38
[INFO] [stdout]    |
[INFO] [stdout] 73 |     pub fn new(c: Vec<u8>, hash: Box<Fn(&[u8]) -> Vec<u8>>) -> SMT {
[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] 73 -     pub fn new(c: Vec<u8>, hash: Box<Fn(&[u8]) -> Vec<u8>>) -> SMT {
[INFO] [stdout] 73 +     pub fn new(c: Vec<u8>, hash: Box<dyn Fn(&[u8]) -> Vec<u8>>) -> SMT {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `split`
[INFO] [stdout]   --> src/cache.rs:56:83
[INFO] [stdout]    |
[INFO] [stdout] 56 |     fn hash_cache(&mut self, left: &[u8], right: &[u8], height: u64, base: &[u8], split: &[u8],
[INFO] [stdout]    |                                                                                   ^^^^^ help: if this is intentional, prefix it with an underscore: `_split`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.89s
[INFO] [stderr]   Executable unittests src/lib.rs (/opt/rustwide/target/debug/deps/smt-938a8b3773b4eb88)
[INFO] [stderr]   Executable unittests src/main.rs (/opt/rustwide/target/debug/deps/smt-78aff7c7b7664557)
[INFO] running `Command { std: "docker" "inspect" "98590ea009f54a70100b487b017ac8b00feca9655dc70407b9c9a660c30c58cc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "98590ea009f54a70100b487b017ac8b00feca9655dc70407b9c9a660c30c58cc", kill_on_drop: false }`
[INFO] [stdout] 98590ea009f54a70100b487b017ac8b00feca9655dc70407b9c9a660c30c58cc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-35/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-35/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] 4802110c6bf63a3d532ff7b4d54ea94ee84e6ae17ab00af4823296745e03147e
[INFO] running `Command { std: "docker" "start" "-a" "4802110c6bf63a3d532ff7b4d54ea94ee84e6ae17ab00af4823296745e03147e", kill_on_drop: false }`
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/tree.rs:69:15
[INFO] [stderr]    |
[INFO] [stderr] 69 |     hash: Box<Fn(&[u8]) -> Vec<u8>>,
[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] 69 -     hash: Box<Fn(&[u8]) -> Vec<u8>>,
[INFO] [stderr] 69 +     hash: Box<dyn Fn(&[u8]) -> Vec<u8>>,
[INFO] [stderr]    | 
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/tree.rs:216:30
[INFO] [stderr]     |
[INFO] [stderr] 216 | fn _interior_hash(hash: &Box<Fn(&[u8]) -> Vec<u8>>, left: &[u8], right: &[u8], height: u64, base: &[u8]) -> Vec<u8> {
[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] 216 - fn _interior_hash(hash: &Box<Fn(&[u8]) -> Vec<u8>>, left: &[u8], right: &[u8], height: u64, base: &[u8]) -> Vec<u8> {
[INFO] [stderr] 216 + fn _interior_hash(hash: &Box<dyn Fn(&[u8]) -> Vec<u8>>, left: &[u8], right: &[u8], height: u64, base: &[u8]) -> Vec<u8> {
[INFO] [stderr]     | 
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/tree.rs:229:26
[INFO] [stderr]     |
[INFO] [stderr] 229 | fn _leaf_hash(hash: &Box<Fn(&[u8]) -> Vec<u8>>, c: &[u8], a: &[u8], base: &[u8]) -> Vec<u8> {
[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] 229 - fn _leaf_hash(hash: &Box<Fn(&[u8]) -> Vec<u8>>, c: &[u8], a: &[u8], base: &[u8]) -> Vec<u8> {
[INFO] [stderr] 229 + fn _leaf_hash(hash: &Box<dyn Fn(&[u8]) -> Vec<u8>>, c: &[u8], a: &[u8], base: &[u8]) -> Vec<u8> {
[INFO] [stderr]     | 
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/tree.rs:73:38
[INFO] [stderr]    |
[INFO] [stderr] 73 |     pub fn new(c: Vec<u8>, hash: Box<Fn(&[u8]) -> Vec<u8>>) -> SMT {
[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] 73 -     pub fn new(c: Vec<u8>, hash: Box<Fn(&[u8]) -> Vec<u8>>) -> SMT {
[INFO] [stderr] 73 +     pub fn new(c: Vec<u8>, hash: Box<dyn Fn(&[u8]) -> Vec<u8>>) -> SMT {
[INFO] [stderr]    | 
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `split`
[INFO] [stderr]   --> src/cache.rs:56:83
[INFO] [stderr]    |
[INFO] [stderr] 56 |     fn hash_cache(&mut self, left: &[u8], right: &[u8], height: u64, base: &[u8], split: &[u8],
[INFO] [stderr]    |                                                                                   ^^^^^ help: if this is intentional, prefix it with an underscore: `_split`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `smt` (lib) generated 5 warnings
[INFO] [stderr] warning: `smt` (lib test) generated 5 warnings (5 duplicates)
[INFO] [stderr] warning: unused import: `rustc_serialize::hex::ToHex`
[INFO] [stderr]  --> src/main.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use rustc_serialize::hex::ToHex;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::collections::HashMap`
[INFO] [stderr]  --> src/main.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 | use std::collections::HashMap;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]  --> src/main.rs:9:65
[INFO] [stderr]   |
[INFO] [stderr] 9 | fn digest_adapter(algorithm: &'static digest::Algorithm) -> Box<Fn(&[u8])->Vec<u8>>{
[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] 9 - fn digest_adapter(algorithm: &'static digest::Algorithm) -> Box<Fn(&[u8])->Vec<u8>>{
[INFO] [stderr] 9 + fn digest_adapter(algorithm: &'static digest::Algorithm) -> Box<dyn Fn(&[u8])->Vec<u8>>{
[INFO] [stderr]   | 
[INFO] [stderr] 
[INFO] [stderr] warning: `smt` (bin "smt" test) generated 3 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/smt-938a8b3773b4eb88)
[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 unittests src/main.rs (/opt/rustwide/target/debug/deps/smt-78aff7c7b7664557)
[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]    Doc-tests smt
[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" "4802110c6bf63a3d532ff7b4d54ea94ee84e6ae17ab00af4823296745e03147e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4802110c6bf63a3d532ff7b4d54ea94ee84e6ae17ab00af4823296745e03147e", kill_on_drop: false }`
[INFO] [stdout] 4802110c6bf63a3d532ff7b4d54ea94ee84e6ae17ab00af4823296745e03147e