[INFO] cloning repository https://github.com/jw3126/hen
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jw3126/hen" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjw3126%2Fhen", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjw3126%2Fhen'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9bb4ceced6b1e926890386c69dcdddd6972706ad
[INFO] checking jw3126/hen against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjw3126%2Fhen" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jw3126/hen on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/jw3126/hen
[INFO] finished tweaking git repo https://github.com/jw3126/hen
[INFO] tweaked toml for git repo https://github.com/jw3126/hen written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/jw3126/hen already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4df56e1546f1897fa777fc96dddc231a1537abf1fa1a4406c898168fb8b3cba8
[INFO] running `Command { std: "docker" "start" "-a" "4df56e1546f1897fa777fc96dddc231a1537abf1fa1a4406c898168fb8b3cba8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4df56e1546f1897fa777fc96dddc231a1537abf1fa1a4406c898168fb8b3cba8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4df56e1546f1897fa777fc96dddc231a1537abf1fa1a4406c898168fb8b3cba8", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0f9856f278e82bfa1f1adea640aaae0c027398c94294928523ec0e7fdf7a3ccc
[INFO] running `Command { std: "docker" "start" "-a" "0f9856f278e82bfa1f1adea640aaae0c027398c94294928523ec0e7fdf7a3ccc", kill_on_drop: false }`
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[INFO] [stderr]    Compiling hen v0.3.0 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling tempdir v0.3.7
[INFO] [stderr]     Checking bitflags v1.0.3
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[INFO] [stderr]     Checking tempfile v3.0.2
[INFO] [stderr]     Checking generic-array v0.9.0
[INFO] [stderr]     Checking rayon v1.0.1
[INFO] [stderr]     Checking digest v0.7.2
[INFO] [stderr]     Checking sha3 v0.7.3
[INFO] [stderr]    Compiling serde_derive v1.0.66
[INFO] [stderr]    Compiling backtrace v0.3.8
[INFO] [stderr]     Checking error-chain v0.11.0
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[INFO] [stderr]     Checking quickcheck v0.6.2
[INFO] [stderr]    Compiling serde_json v1.0.19
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling cargo_metadata v0.5.5
[INFO] [stdout] warning: the item `Option` is imported redundantly
[INFO] [stdout]  --> src/tokenizer.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::option::Option;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:124:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `Option` is already defined here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Iterator` is imported redundantly
[INFO] [stdout]  --> src/tokenizer.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::iter::Iterator;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:124:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `Iterator` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `sha3` is imported redundantly
[INFO] [stdout]  --> src/simulation.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use sha3;
[INFO] [stdout]   |     ^^^^
[INFO] [stdout]   |
[INFO] [stdout]  ::: src/main.rs:6:1
[INFO] [stdout]   |
[INFO] [stdout] 6 | extern crate sha3;
[INFO] [stdout]   | ------------------ the item `sha3` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `std` is imported redundantly
[INFO] [stdout]   --> src/simulation.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | use std;
[INFO] [stdout]    |     ^^^ the item `std` is already imported by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]    --> src/simulation.rs:607:10
[INFO] [stdout]     |
[INFO] [stdout] 607 |         };
[INFO] [stdout]     |          ^ help: remove this semicolon
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::path::Path`
[INFO] [stdout]  --> src/output_parser.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::path::Path;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `serde` is imported redundantly
[INFO] [stdout]   --> src/util.rs:4:5
[INFO] [stdout]    |
[INFO] [stdout] 4  | use serde;
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/main.rs:24:1
[INFO] [stdout]    |
[INFO] [stdout] 24 | extern crate serde;
[INFO] [stdout]    | ------------------- the item `serde` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `From` is imported redundantly
[INFO] [stdout]  --> src/omittable.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::convert::From;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:124:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `From` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `clap` is imported redundantly
[INFO] [stdout]   --> src/app/mod.rs:2:5
[INFO] [stdout]    |
[INFO] [stdout] 2  | use clap;
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/main.rs:23:1
[INFO] [stdout]    |
[INFO] [stdout] 23 | extern crate clap;
[INFO] [stdout]    | ------------------ the item `clap` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `num_cpus` is imported redundantly
[INFO] [stdout]  --> src/app/mod.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use num_cpus;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]  ::: src/main.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | extern crate num_cpus;
[INFO] [stdout]   | ---------------------- the item `num_cpus` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `serde_json` is imported redundantly
[INFO] [stdout]   --> src/app/mod.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | use serde_json;
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/main.rs:25:1
[INFO] [stdout]    |
[INFO] [stdout] 25 | extern crate serde_json;
[INFO] [stdout]    | ------------------------ the item `serde_json` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `std` is imported redundantly
[INFO] [stdout]  --> src/app/util.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std;
[INFO] [stdout]   |     ^^^ the item `std` is already imported by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated trait `std::ascii::AsciiExt`: use inherent methods instead
[INFO] [stdout]    --> src/app/mod.rs:318:1
[INFO] [stdout]     |
[INFO] [stdout] 318 | / arg_enum!{
[INFO] [stdout] 319 | |     #[derive(PartialEq, Debug)]
[INFO] [stdout] 320 | |     pub enum ShowWhat {
[INFO] [stdout] 321 | |         Output,
[INFO] [stdout] ...   |
[INFO] [stdout] 325 | |     }
[INFO] [stdout] 326 | | }
[INFO] [stdout]     | |_^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout]     = note: this warning originates in the macro `arg_enum` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/tokenizer.rs:229:33
[INFO] [stdout]     |
[INFO] [stdout] 229 | fn read_clean_line(reader: &mut BufRead) -> Result<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]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 229 | fn read_clean_line(reader: &mut dyn BufRead) -> Result<String> {
[INFO] [stdout]     |                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/tokenizer.rs:243:32
[INFO] [stdout]     |
[INFO] [stdout] 243 | fn read_token_raw(reader: &mut BufRead) -> Result<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: if this is an object-safe trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 243 | fn read_token_raw(reader: &mut dyn BufRead) -> Result<String> {
[INFO] [stdout]     |                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/tokenizer.rs:59:35
[INFO] [stdout]    |
[INFO] [stdout] 59 |     pub fn read_next(reader: &mut BufRead) -> Option<Result<Token>> {
[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: if this is an object-safe trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 59 |     pub fn read_next(reader: &mut dyn BufRead) -> Option<Result<Token>> {
[INFO] [stdout]    |                                   +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/tokenizer.rs:123:38
[INFO] [stdout]     |
[INFO] [stdout] 123 |     pub fn parse_reader(reader: &mut BufRead) -> Result<TokenStream> {
[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: if this is an object-safe trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 123 |     pub fn parse_reader(reader: &mut dyn BufRead) -> Result<TokenStream> {
[INFO] [stdout]     |                                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/output_parser.rs:18:33
[INFO] [stdout]    |
[INFO] [stdout] 18 | fn read_line_until(reader: &mut BufRead, re: &Regex) -> Option<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: if this is an object-safe trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 18 | fn read_line_until(reader: &mut dyn BufRead, re: &Regex) -> Option<String> {
[INFO] [stdout]    |                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/output_parser.rs:27:27
[INFO] [stdout]    |
[INFO] [stdout] 27 | fn read_line(reader: &mut BufRead) -> Option<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: if this is an object-safe trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 27 | fn read_line(reader: &mut dyn BufRead) -> Option<String> {
[INFO] [stdout]    |                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/output_parser.rs:77:45
[INFO] [stdout]    |
[INFO] [stdout] 77 | pub fn parse_simulation_output(reader: &mut BufRead) -> Result<SingSimParsedOutput> {
[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: if this is an object-safe trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 77 | pub fn parse_simulation_output(reader: &mut dyn BufRead) -> Result<SingSimParsedOutput> {
[INFO] [stdout]    |                                             +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/errors.rs:25:39
[INFO] [stdout]    |
[INFO] [stdout] 25 | pub fn cannot_verb(verb: &str, item: &Debug) -> 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: if this is an object-safe trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 25 | pub fn cannot_verb(verb: &str, item: &dyn Debug) -> String {
[INFO] [stdout]    |                                       +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/errors.rs:29:28
[INFO] [stdout]    |
[INFO] [stdout] 29 | pub fn cannot_write(path: &Debug) -> 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: if this is an object-safe trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 29 | pub fn cannot_write(path: &dyn Debug) -> String {
[INFO] [stdout]    |                            +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/errors.rs:33:27
[INFO] [stdout]    |
[INFO] [stdout] 33 | pub fn cannot_read(path: &Debug) -> 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: if this is an object-safe trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 33 | pub fn cannot_read(path: &dyn Debug) -> String {
[INFO] [stdout]    |                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/errors.rs:37:29
[INFO] [stdout]    |
[INFO] [stdout] 37 | pub fn cannot_create(path: &Debug) -> 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: if this is an object-safe trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 37 | pub fn cannot_create(path: &dyn Debug) -> String {
[INFO] [stdout]    |                             +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/errors.rs:41:29
[INFO] [stdout]    |
[INFO] [stdout] 41 | pub fn cannot_remove(path: &Debug) -> 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: if this is an object-safe trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 41 | pub fn cannot_remove(path: &dyn Debug) -> String {
[INFO] [stdout]    |                             +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling skeptic v0.13.3
[INFO] [stdout] warning: methods `is_available` and `unwrap` are never used
[INFO] [stdout]   --> src/omittable.rs:28:12
[INFO] [stdout]    |
[INFO] [stdout] 27 | impl<T> Omittable<T> {
[INFO] [stdout]    | -------------------- methods in this implementation
[INFO] [stdout] 28 |     pub fn is_available(&self) -> bool {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 69 |     pub fn unwrap(self: Omittable<T>) -> T {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 26 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling assert_cli v0.5.4
[INFO] [stdout] warning: the item `Option` is imported redundantly
[INFO] [stdout]  --> src/tokenizer.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::option::Option;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:124:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `Option` is already defined here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Iterator` is imported redundantly
[INFO] [stdout]  --> src/tokenizer.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::iter::Iterator;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:124:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `Iterator` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `sha3` is imported redundantly
[INFO] [stdout]  --> src/simulation.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use sha3;
[INFO] [stdout]   |     ^^^^
[INFO] [stdout]   |
[INFO] [stdout]  ::: src/main.rs:6:1
[INFO] [stdout]   |
[INFO] [stdout] 6 | extern crate sha3;
[INFO] [stdout]   | ------------------ the item `sha3` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `std` is imported redundantly
[INFO] [stdout]   --> src/simulation.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | use std;
[INFO] [stdout]    |     ^^^ the item `std` is already imported by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]    --> src/simulation.rs:607:10
[INFO] [stdout]     |
[INFO] [stdout] 607 |         };
[INFO] [stdout]     |          ^ help: remove this semicolon
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Uf64` is imported redundantly
[INFO] [stdout]    --> src/simulation.rs:691:9
[INFO] [stdout]     |
[INFO] [stdout] 689 |     use super::*;
[INFO] [stdout]     |         -------- the item `Uf64` is already imported here
[INFO] [stdout] 690 |     use util::{asset_path, load};
[INFO] [stdout] 691 |     use uncertain::Uf64;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Uf64` is imported redundantly
[INFO] [stdout]    --> src/output_parser.rs:159:9
[INFO] [stdout]     |
[INFO] [stdout] 157 |     use super::*;
[INFO] [stdout]     |         -------- the item `Uf64` is already imported here
[INFO] [stdout] 158 |     use util::asset_path;
[INFO] [stdout] 159 |     use uncertain::Uf64;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `serde` is imported redundantly
[INFO] [stdout]   --> src/util.rs:4:5
[INFO] [stdout]    |
[INFO] [stdout] 4  | use serde;
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/main.rs:24:1
[INFO] [stdout]    |
[INFO] [stdout] 24 | extern crate serde;
[INFO] [stdout]    | ------------------- the item `serde` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `From` is imported redundantly
[INFO] [stdout]  --> src/omittable.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::convert::From;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:124:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `From` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `clap` is imported redundantly
[INFO] [stdout]   --> src/app/mod.rs:2:5
[INFO] [stdout]    |
[INFO] [stdout] 2  | use clap;
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/main.rs:23:1
[INFO] [stdout]    |
[INFO] [stdout] 23 | extern crate clap;
[INFO] [stdout]    | ------------------ the item `clap` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `num_cpus` is imported redundantly
[INFO] [stdout]  --> src/app/mod.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use num_cpus;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]  ::: src/main.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | extern crate num_cpus;
[INFO] [stdout]   | ---------------------- the item `num_cpus` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `serde_json` is imported redundantly
[INFO] [stdout]   --> src/app/mod.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | use serde_json;
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/main.rs:25:1
[INFO] [stdout]    |
[INFO] [stdout] 25 | extern crate serde_json;
[INFO] [stdout]    | ------------------------ the item `serde_json` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `std` is imported redundantly
[INFO] [stdout]  --> src/app/util.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std;
[INFO] [stdout]   |     ^^^ the item `std` is already imported by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `assert_cli` is imported redundantly
[INFO] [stdout]  --> src/tests.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use assert_cli;
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]  ::: src/main.rs:9:1
[INFO] [stdout]   |
[INFO] [stdout] 9 | extern crate assert_cli;
[INFO] [stdout]   | ------------------------ the item `assert_cli` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `rand` is imported redundantly
[INFO] [stdout]  --> src/tests.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use rand;
[INFO] [stdout]   |     ^^^^
[INFO] [stdout]   |
[INFO] [stdout]  ::: src/main.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | extern crate rand;
[INFO] [stdout]   | ------------------ the item `rand` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated trait `std::ascii::AsciiExt`: use inherent methods instead
[INFO] [stdout]    --> src/app/mod.rs:318:1
[INFO] [stdout]     |
[INFO] [stdout] 318 | / arg_enum!{
[INFO] [stdout] 319 | |     #[derive(PartialEq, Debug)]
[INFO] [stdout] 320 | |     pub enum ShowWhat {
[INFO] [stdout] 321 | |         Output,
[INFO] [stdout] ...   |
[INFO] [stdout] 325 | |     }
[INFO] [stdout] 326 | | }
[INFO] [stdout]     | |_^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout]     = note: this warning originates in the macro `arg_enum` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/tokenizer.rs:229:33
[INFO] [stdout]     |
[INFO] [stdout] 229 | fn read_clean_line(reader: &mut BufRead) -> Result<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]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 229 | fn read_clean_line(reader: &mut dyn BufRead) -> Result<String> {
[INFO] [stdout]     |                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/tokenizer.rs:243:32
[INFO] [stdout]     |
[INFO] [stdout] 243 | fn read_token_raw(reader: &mut BufRead) -> Result<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: if this is an object-safe trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 243 | fn read_token_raw(reader: &mut dyn BufRead) -> Result<String> {
[INFO] [stdout]     |                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/tokenizer.rs:59:35
[INFO] [stdout]    |
[INFO] [stdout] 59 |     pub fn read_next(reader: &mut BufRead) -> Option<Result<Token>> {
[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: if this is an object-safe trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 59 |     pub fn read_next(reader: &mut dyn BufRead) -> Option<Result<Token>> {
[INFO] [stdout]    |                                   +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/tokenizer.rs:123:38
[INFO] [stdout]     |
[INFO] [stdout] 123 |     pub fn parse_reader(reader: &mut BufRead) -> Result<TokenStream> {
[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: if this is an object-safe trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 123 |     pub fn parse_reader(reader: &mut dyn BufRead) -> Result<TokenStream> {
[INFO] [stdout]     |                                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/output_parser.rs:18:33
[INFO] [stdout]    |
[INFO] [stdout] 18 | fn read_line_until(reader: &mut BufRead, re: &Regex) -> Option<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: if this is an object-safe trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 18 | fn read_line_until(reader: &mut dyn BufRead, re: &Regex) -> Option<String> {
[INFO] [stdout]    |                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/output_parser.rs:27:27
[INFO] [stdout]    |
[INFO] [stdout] 27 | fn read_line(reader: &mut BufRead) -> Option<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: if this is an object-safe trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 27 | fn read_line(reader: &mut dyn BufRead) -> Option<String> {
[INFO] [stdout]    |                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/output_parser.rs:77:45
[INFO] [stdout]    |
[INFO] [stdout] 77 | pub fn parse_simulation_output(reader: &mut BufRead) -> Result<SingSimParsedOutput> {
[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: if this is an object-safe trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 77 | pub fn parse_simulation_output(reader: &mut dyn BufRead) -> Result<SingSimParsedOutput> {
[INFO] [stdout]    |                                             +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/errors.rs:25:39
[INFO] [stdout]    |
[INFO] [stdout] 25 | pub fn cannot_verb(verb: &str, item: &Debug) -> 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: if this is an object-safe trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 25 | pub fn cannot_verb(verb: &str, item: &dyn Debug) -> String {
[INFO] [stdout]    |                                       +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/errors.rs:29:28
[INFO] [stdout]    |
[INFO] [stdout] 29 | pub fn cannot_write(path: &Debug) -> 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: if this is an object-safe trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 29 | pub fn cannot_write(path: &dyn Debug) -> String {
[INFO] [stdout]    |                            +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/errors.rs:33:27
[INFO] [stdout]    |
[INFO] [stdout] 33 | pub fn cannot_read(path: &Debug) -> 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: if this is an object-safe trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 33 | pub fn cannot_read(path: &dyn Debug) -> String {
[INFO] [stdout]    |                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/errors.rs:37:29
[INFO] [stdout]    |
[INFO] [stdout] 37 | pub fn cannot_create(path: &Debug) -> 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: if this is an object-safe trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 37 | pub fn cannot_create(path: &dyn Debug) -> String {
[INFO] [stdout]    |                             +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/errors.rs:41:29
[INFO] [stdout]    |
[INFO] [stdout] 41 | pub fn cannot_remove(path: &Debug) -> 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: if this is an object-safe trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 41 | pub fn cannot_remove(path: &dyn Debug) -> String {
[INFO] [stdout]    |                             +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 28 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 16.55s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: syn v0.14.2
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 1`
[INFO] running `Command { std: "docker" "inspect" "0f9856f278e82bfa1f1adea640aaae0c027398c94294928523ec0e7fdf7a3ccc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0f9856f278e82bfa1f1adea640aaae0c027398c94294928523ec0e7fdf7a3ccc", kill_on_drop: false }`
[INFO] [stdout] 0f9856f278e82bfa1f1adea640aaae0c027398c94294928523ec0e7fdf7a3ccc