[INFO] cloning repository https://github.com/LPGhatguy/mab
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/LPGhatguy/mab" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLPGhatguy%2Fmab", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLPGhatguy%2Fmab'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9d2c4d111dc93eac3d9446d7c581a98b44e33224
[INFO] building LPGhatguy/mab against master#d59f06fc64844ec2073e5e888f7470989ef25ff9 for pr-119440
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLPGhatguy%2Fmab" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/LPGhatguy/mab on toolchain d59f06fc64844ec2073e5e888f7470989ef25ff9
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+d59f06fc64844ec2073e5e888f7470989ef25ff9" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/LPGhatguy/mab
[INFO] finished tweaking git repo https://github.com/LPGhatguy/mab
[INFO] tweaked toml for git repo https://github.com/LPGhatguy/mab written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/LPGhatguy/mab 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" "+d59f06fc64844ec2073e5e888f7470989ef25ff9" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[ERROR] this task or one of its parent failed!
[ERROR] no output for 300 seconds
[ERROR] note: run with `RUST_BACKTRACE=1` to display a backtrace.
[INFO] building LPGhatguy/mab against try#fe8f664b41f030f307cfeb6cb8c3a1419292aeed for pr-119440
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLPGhatguy%2Fmab" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/LPGhatguy/mab on toolchain fe8f664b41f030f307cfeb6cb8c3a1419292aeed
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+fe8f664b41f030f307cfeb6cb8c3a1419292aeed" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/LPGhatguy/mab
[INFO] finished tweaking git repo https://github.com/LPGhatguy/mab
[INFO] tweaked toml for git repo https://github.com/LPGhatguy/mab written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/LPGhatguy/mab 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" "+fe8f664b41f030f307cfeb6cb8c3a1419292aeed" "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
[ERROR] error running command: no output for 300 seconds
[INFO] building LPGhatguy/mab against try#fe8f664b41f030f307cfeb6cb8c3a1419292aeed for pr-119440
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLPGhatguy%2Fmab" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/LPGhatguy/mab on toolchain fe8f664b41f030f307cfeb6cb8c3a1419292aeed
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+fe8f664b41f030f307cfeb6cb8c3a1419292aeed" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/LPGhatguy/mab
[INFO] finished tweaking git repo https://github.com/LPGhatguy/mab
[INFO] tweaked toml for git repo https://github.com/LPGhatguy/mab written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/LPGhatguy/mab 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" "+fe8f664b41f030f307cfeb6cb8c3a1419292aeed" "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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded serde_json v1.0.17
[INFO] [stderr]   Downloaded serde_derive v1.0.45
[INFO] [stderr]   Downloaded syn v0.13.7
[INFO] [stderr]   Downloaded serde v1.0.45
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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" "+fe8f664b41f030f307cfeb6cb8c3a1419292aeed" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ca9cbff4d032f9429ea90f59a50482b27b6eba1b3a189904ce48b0059d79eb80
[INFO] running `Command { std: "docker" "start" "-a" "ca9cbff4d032f9429ea90f59a50482b27b6eba1b3a189904ce48b0059d79eb80", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ca9cbff4d032f9429ea90f59a50482b27b6eba1b3a189904ce48b0059d79eb80", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ca9cbff4d032f9429ea90f59a50482b27b6eba1b3a189904ce48b0059d79eb80", kill_on_drop: false }`
[INFO] [stdout] ca9cbff4d032f9429ea90f59a50482b27b6eba1b3a189904ce48b0059d79eb80
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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" "+fe8f664b41f030f307cfeb6cb8c3a1419292aeed" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b141e978e63af06f1fd2562f13e222471bd55a3191590caa42a50506bfe153a4
[INFO] running `Command { std: "docker" "start" "-a" "b141e978e63af06f1fd2562f13e222471bd55a3191590caa42a50506bfe153a4", kill_on_drop: false }`
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling libc v0.2.40
[INFO] [stderr]    Compiling void v1.0.2
[INFO] [stderr]    Compiling regex v1.0.0
[INFO] [stderr]    Compiling lazy_static v1.0.0
[INFO] [stderr]    Compiling ucd-util v0.1.1
[INFO] [stderr]    Compiling utf8-ranges v1.0.0
[INFO] [stderr]    Compiling serde v1.0.45
[INFO] [stderr]    Compiling unreachable v1.0.0
[INFO] [stderr]    Compiling proc-macro2 v0.3.8
[INFO] [stderr]    Compiling thread_local v0.3.5
[INFO] [stderr]    Compiling regex-syntax v0.6.0
[INFO] [stderr]    Compiling quote v0.5.2
[INFO] [stderr]    Compiling memchr v2.0.1
[INFO] [stderr]    Compiling syn v0.13.7
[INFO] [stderr]    Compiling aho-corasick v0.6.4
[INFO] [stderr]    Compiling serde_derive_internals v0.23.1
[INFO] [stderr]    Compiling serde_derive v1.0.45
[INFO] [stderr]    Compiling mab v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated constant `std::sync::ONCE_INIT`: the `new` function is now preferred
[INFO] [stdout]    --> src/tokenizer.rs:226:1
[INFO] [stdout]     |
[INFO] [stdout] 226 | / lazy_static! {
[INFO] [stdout] 227 | |     static ref SYMBOLS: Vec<Symbol> = vec![
[INFO] [stdout] 228 | |         Symbol::LeftBrace, Symbol::RightBrace,
[INFO] [stdout] 229 | |         Symbol::LeftBracket, Symbol::RightBracket,
[INFO] [stdout] ...   |
[INFO] [stdout] 274 | |     static ref PATTERN_CHARS_AFTER_NEWLINE: Regex = Regex::new(r"\n[^\n]+$").unwrap();
[INFO] [stdout] 275 | | }
[INFO] [stdout]     | |_^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout]     = note: this warning originates in the macro `__lazy_static_create` which comes from the expansion of the macro `lazy_static` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::sync::ONCE_INIT`: the `new` function is now preferred
[INFO] [stdout]    --> src/tokenizer.rs:226:1
[INFO] [stdout]     |
[INFO] [stdout] 226 | / lazy_static! {
[INFO] [stdout] 227 | |     static ref SYMBOLS: Vec<Symbol> = vec![
[INFO] [stdout] 228 | |         Symbol::LeftBrace, Symbol::RightBrace,
[INFO] [stdout] 229 | |         Symbol::LeftBracket, Symbol::RightBracket,
[INFO] [stdout] ...   |
[INFO] [stdout] 274 | |     static ref PATTERN_CHARS_AFTER_NEWLINE: Regex = Regex::new(r"\n[^\n]+$").unwrap();
[INFO] [stdout] 275 | | }
[INFO] [stdout]     | |_^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `__lazy_static_create` which comes from the expansion of the macro `lazy_static` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::sync::ONCE_INIT`: the `new` function is now preferred
[INFO] [stdout]    --> src/tokenizer.rs:226:1
[INFO] [stdout]     |
[INFO] [stdout] 226 | / lazy_static! {
[INFO] [stdout] 227 | |     static ref SYMBOLS: Vec<Symbol> = vec![
[INFO] [stdout] 228 | |         Symbol::LeftBrace, Symbol::RightBrace,
[INFO] [stdout] 229 | |         Symbol::LeftBracket, Symbol::RightBracket,
[INFO] [stdout] ...   |
[INFO] [stdout] 274 | |     static ref PATTERN_CHARS_AFTER_NEWLINE: Regex = Regex::new(r"\n[^\n]+$").unwrap();
[INFO] [stdout] 275 | | }
[INFO] [stdout]     | |_^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `__lazy_static_create` which comes from the expansion of the macro `lazy_static` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::sync::ONCE_INIT`: the `new` function is now preferred
[INFO] [stdout]    --> src/tokenizer.rs:226:1
[INFO] [stdout]     |
[INFO] [stdout] 226 | / lazy_static! {
[INFO] [stdout] 227 | |     static ref SYMBOLS: Vec<Symbol> = vec![
[INFO] [stdout] 228 | |         Symbol::LeftBrace, Symbol::RightBrace,
[INFO] [stdout] 229 | |         Symbol::LeftBracket, Symbol::RightBracket,
[INFO] [stdout] ...   |
[INFO] [stdout] 274 | |     static ref PATTERN_CHARS_AFTER_NEWLINE: Regex = Regex::new(r"\n[^\n]+$").unwrap();
[INFO] [stdout] 275 | | }
[INFO] [stdout]     | |_^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `__lazy_static_create` which comes from the expansion of the macro `lazy_static` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::sync::ONCE_INIT`: the `new` function is now preferred
[INFO] [stdout]    --> src/tokenizer.rs:226:1
[INFO] [stdout]     |
[INFO] [stdout] 226 | / lazy_static! {
[INFO] [stdout] 227 | |     static ref SYMBOLS: Vec<Symbol> = vec![
[INFO] [stdout] 228 | |         Symbol::LeftBrace, Symbol::RightBrace,
[INFO] [stdout] 229 | |         Symbol::LeftBracket, Symbol::RightBracket,
[INFO] [stdout] ...   |
[INFO] [stdout] 274 | |     static ref PATTERN_CHARS_AFTER_NEWLINE: Regex = Regex::new(r"\n[^\n]+$").unwrap();
[INFO] [stdout] 275 | | }
[INFO] [stdout]     | |_^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `__lazy_static_create` which comes from the expansion of the macro `lazy_static` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::sync::ONCE_INIT`: the `new` function is now preferred
[INFO] [stdout]    --> src/tokenizer.rs:226:1
[INFO] [stdout]     |
[INFO] [stdout] 226 | / lazy_static! {
[INFO] [stdout] 227 | |     static ref SYMBOLS: Vec<Symbol> = vec![
[INFO] [stdout] 228 | |         Symbol::LeftBrace, Symbol::RightBrace,
[INFO] [stdout] 229 | |         Symbol::LeftBracket, Symbol::RightBracket,
[INFO] [stdout] ...   |
[INFO] [stdout] 274 | |     static ref PATTERN_CHARS_AFTER_NEWLINE: Regex = Regex::new(r"\n[^\n]+$").unwrap();
[INFO] [stdout] 275 | | }
[INFO] [stdout]     | |_^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `__lazy_static_create` which comes from the expansion of the macro `lazy_static` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::sync::ONCE_INIT`: the `new` function is now preferred
[INFO] [stdout]    --> src/tokenizer.rs:226:1
[INFO] [stdout]     |
[INFO] [stdout] 226 | / lazy_static! {
[INFO] [stdout] 227 | |     static ref SYMBOLS: Vec<Symbol> = vec![
[INFO] [stdout] 228 | |         Symbol::LeftBrace, Symbol::RightBrace,
[INFO] [stdout] 229 | |         Symbol::LeftBracket, Symbol::RightBracket,
[INFO] [stdout] ...   |
[INFO] [stdout] 274 | |     static ref PATTERN_CHARS_AFTER_NEWLINE: Regex = Regex::new(r"\n[^\n]+$").unwrap();
[INFO] [stdout] 275 | | }
[INFO] [stdout]     | |_^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `__lazy_static_create` which comes from the expansion of the macro `lazy_static` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::sync::ONCE_INIT`: the `new` function is now preferred
[INFO] [stdout]    --> src/tokenizer.rs:226:1
[INFO] [stdout]     |
[INFO] [stdout] 226 | / lazy_static! {
[INFO] [stdout] 227 | |     static ref SYMBOLS: Vec<Symbol> = vec![
[INFO] [stdout] 228 | |         Symbol::LeftBrace, Symbol::RightBrace,
[INFO] [stdout] 229 | |         Symbol::LeftBracket, Symbol::RightBracket,
[INFO] [stdout] ...   |
[INFO] [stdout] 274 | |     static ref PATTERN_CHARS_AFTER_NEWLINE: Regex = Regex::new(r"\n[^\n]+$").unwrap();
[INFO] [stdout] 275 | | }
[INFO] [stdout]     | |_^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `__lazy_static_create` which comes from the expansion of the macro `lazy_static` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::sync::ONCE_INIT`: the `new` function is now preferred
[INFO] [stdout]    --> src/tokenizer.rs:226:1
[INFO] [stdout]     |
[INFO] [stdout] 226 | / lazy_static! {
[INFO] [stdout] 227 | |     static ref SYMBOLS: Vec<Symbol> = vec![
[INFO] [stdout] 228 | |         Symbol::LeftBrace, Symbol::RightBrace,
[INFO] [stdout] 229 | |         Symbol::LeftBracket, Symbol::RightBracket,
[INFO] [stdout] ...   |
[INFO] [stdout] 274 | |     static ref PATTERN_CHARS_AFTER_NEWLINE: Regex = Regex::new(r"\n[^\n]+$").unwrap();
[INFO] [stdout] 275 | | }
[INFO] [stdout]     | |_^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `__lazy_static_create` which comes from the expansion of the macro `lazy_static` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::sync::ONCE_INIT`: the `new` function is now preferred
[INFO] [stdout]    --> src/tokenizer.rs:226:1
[INFO] [stdout]     |
[INFO] [stdout] 226 | / lazy_static! {
[INFO] [stdout] 227 | |     static ref SYMBOLS: Vec<Symbol> = vec![
[INFO] [stdout] 228 | |         Symbol::LeftBrace, Symbol::RightBrace,
[INFO] [stdout] 229 | |         Symbol::LeftBracket, Symbol::RightBracket,
[INFO] [stdout] ...   |
[INFO] [stdout] 274 | |     static ref PATTERN_CHARS_AFTER_NEWLINE: Regex = Regex::new(r"\n[^\n]+$").unwrap();
[INFO] [stdout] 275 | | }
[INFO] [stdout]     | |_^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `__lazy_static_create` which comes from the expansion of the macro `lazy_static` (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/emitter.rs:5:31
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub fn emit_chunk<'a>(w: &mut Write, chunk: &Chunk<'a>) -> fmt::Result {
[INFO] [stdout]   |                               ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]   = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]   = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub fn emit_chunk<'a>(w: &mut dyn Write, chunk: &Chunk<'a>) -> fmt::Result {
[INFO] [stdout]   |                               +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/emitter.rs:13:31
[INFO] [stdout]    |
[INFO] [stdout] 13 | fn emit_statement<'a>(w: &mut Write, statement: &Statement<'a>) -> fmt::Result {
[INFO] [stdout]    |                               ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 13 | fn emit_statement<'a>(w: &mut dyn Write, statement: &Statement<'a>) -> fmt::Result {
[INFO] [stdout]    |                               +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/emitter.rs:29:32
[INFO] [stdout]    |
[INFO] [stdout] 29 | fn emit_assignment<'a>(w: &mut Write, _assignment: &Assignment<'a>) -> fmt::Result {
[INFO] [stdout]    |                                ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 29 | fn emit_assignment<'a>(w: &mut dyn Write, _assignment: &Assignment<'a>) -> fmt::Result {
[INFO] [stdout]    |                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/emitter.rs:35:38
[INFO] [stdout]    |
[INFO] [stdout] 35 | fn emit_local_assignment<'a>(w: &mut Write, _assignment: &LocalAssignment<'a>) -> fmt::Result {
[INFO] [stdout]    |                                      ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 35 | fn emit_local_assignment<'a>(w: &mut dyn Write, _assignment: &LocalAssignment<'a>) -> fmt::Result {
[INFO] [stdout]    |                                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/emitter.rs:41:35
[INFO] [stdout]    |
[INFO] [stdout] 41 | fn emit_function_call<'a>(w: &mut Write, _function_call: &FunctionCall<'a>) -> fmt::Result {
[INFO] [stdout]    |                                   ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 41 | fn emit_function_call<'a>(w: &mut dyn Write, _function_call: &FunctionCall<'a>) -> fmt::Result {
[INFO] [stdout]    |                                   +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/emitter.rs:47:33
[INFO] [stdout]    |
[INFO] [stdout] 47 | fn emit_numeric_for<'a>(w: &mut Write, _numeric_for: &NumericFor<'a>) -> fmt::Result {
[INFO] [stdout]    |                                 ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 47 | fn emit_numeric_for<'a>(w: &mut dyn Write, _numeric_for: &NumericFor<'a>) -> fmt::Result {
[INFO] [stdout]    |                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/emitter.rs:53:33
[INFO] [stdout]    |
[INFO] [stdout] 53 | fn emit_generic_for<'a>(w: &mut Write, _generic_for: &GenericFor<'a>) -> fmt::Result {
[INFO] [stdout]    |                                 ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 53 | fn emit_generic_for<'a>(w: &mut dyn Write, _generic_for: &GenericFor<'a>) -> fmt::Result {
[INFO] [stdout]    |                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/emitter.rs:59:34
[INFO] [stdout]    |
[INFO] [stdout] 59 | fn emit_if_statement<'a>(w: &mut Write, _if_statement: &IfStatement<'a>) -> fmt::Result {
[INFO] [stdout]    |                                  ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 59 | fn emit_if_statement<'a>(w: &mut dyn Write, _if_statement: &IfStatement<'a>) -> fmt::Result {
[INFO] [stdout]    |                                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/emitter.rs:65:32
[INFO] [stdout]    |
[INFO] [stdout] 65 | fn emit_while_loop<'a>(w: &mut Write, _while_loop: &WhileLoop<'a>) -> fmt::Result {
[INFO] [stdout]    |                                ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 65 | fn emit_while_loop<'a>(w: &mut dyn Write, _while_loop: &WhileLoop<'a>) -> fmt::Result {
[INFO] [stdout]    |                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/emitter.rs:71:33
[INFO] [stdout]    |
[INFO] [stdout] 71 | fn emit_repeat_loop<'a>(w: &mut Write, _repeat_loop: &RepeatLoop<'a>) -> fmt::Result {
[INFO] [stdout]    |                                 ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 71 | fn emit_repeat_loop<'a>(w: &mut dyn Write, _repeat_loop: &RepeatLoop<'a>) -> fmt::Result {
[INFO] [stdout]    |                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/emitter.rs:77:42
[INFO] [stdout]    |
[INFO] [stdout] 77 | fn emit_function_declaration<'a>(w: &mut Write, _function_declaration: &FunctionDeclaration<'a>) -> fmt::Result {
[INFO] [stdout]    |                                          ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 77 | fn emit_function_declaration<'a>(w: &mut dyn Write, _function_declaration: &FunctionDeclaration<'a>) -> fmt::Result {
[INFO] [stdout]    |                                          +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 21 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 11.57s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: syn v0.13.7
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 2`
[INFO] running `Command { std: "docker" "inspect" "b141e978e63af06f1fd2562f13e222471bd55a3191590caa42a50506bfe153a4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b141e978e63af06f1fd2562f13e222471bd55a3191590caa42a50506bfe153a4", kill_on_drop: false }`
[INFO] [stdout] b141e978e63af06f1fd2562f13e222471bd55a3191590caa42a50506bfe153a4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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" "+fe8f664b41f030f307cfeb6cb8c3a1419292aeed" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1593ab46cf63c11a3ab004688028a20f3ad31f5d794516808f5fe7245fa90cad
[INFO] running `Command { std: "docker" "start" "-a" "1593ab46cf63c11a3ab004688028a20f3ad31f5d794516808f5fe7245fa90cad", kill_on_drop: false }`
[INFO] [stderr]    Compiling dtoa v0.4.2
[INFO] [stderr]    Compiling itoa v0.4.1
[INFO] [stdout] warning: use of deprecated constant `std::sync::ONCE_INIT`: the `new` function is now preferred
[INFO] [stdout]    --> src/tokenizer.rs:226:1
[INFO] [stdout]     |
[INFO] [stdout] 226 | / lazy_static! {
[INFO] [stdout] 227 | |     static ref SYMBOLS: Vec<Symbol> = vec![
[INFO] [stdout] 228 | |         Symbol::LeftBrace, Symbol::RightBrace,
[INFO] [stdout] 229 | |         Symbol::LeftBracket, Symbol::RightBracket,
[INFO] [stdout] ...   |
[INFO] [stdout] 274 | |     static ref PATTERN_CHARS_AFTER_NEWLINE: Regex = Regex::new(r"\n[^\n]+$").unwrap();
[INFO] [stdout] 275 | | }
[INFO] [stdout]     | |_^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout]     = note: this warning originates in the macro `__lazy_static_create` which comes from the expansion of the macro `lazy_static` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::sync::ONCE_INIT`: the `new` function is now preferred
[INFO] [stdout]    --> src/tokenizer.rs:226:1
[INFO] [stdout]     |
[INFO] [stdout] 226 | / lazy_static! {
[INFO] [stdout] 227 | |     static ref SYMBOLS: Vec<Symbol> = vec![
[INFO] [stdout] 228 | |         Symbol::LeftBrace, Symbol::RightBrace,
[INFO] [stdout] 229 | |         Symbol::LeftBracket, Symbol::RightBracket,
[INFO] [stdout] ...   |
[INFO] [stdout] 274 | |     static ref PATTERN_CHARS_AFTER_NEWLINE: Regex = Regex::new(r"\n[^\n]+$").unwrap();
[INFO] [stdout] 275 | | }
[INFO] [stdout]     | |_^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `__lazy_static_create` which comes from the expansion of the macro `lazy_static` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::sync::ONCE_INIT`: the `new` function is now preferred
[INFO] [stdout]    --> src/tokenizer.rs:226:1
[INFO] [stdout]     |
[INFO] [stdout] 226 | / lazy_static! {
[INFO] [stdout] 227 | |     static ref SYMBOLS: Vec<Symbol> = vec![
[INFO] [stdout] 228 | |         Symbol::LeftBrace, Symbol::RightBrace,
[INFO] [stdout] 229 | |         Symbol::LeftBracket, Symbol::RightBracket,
[INFO] [stdout] ...   |
[INFO] [stdout] 274 | |     static ref PATTERN_CHARS_AFTER_NEWLINE: Regex = Regex::new(r"\n[^\n]+$").unwrap();
[INFO] [stdout] 275 | | }
[INFO] [stdout]     | |_^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `__lazy_static_create` which comes from the expansion of the macro `lazy_static` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::sync::ONCE_INIT`: the `new` function is now preferred
[INFO] [stdout]    --> src/tokenizer.rs:226:1
[INFO] [stdout]     |
[INFO] [stdout] 226 | / lazy_static! {
[INFO] [stdout] 227 | |     static ref SYMBOLS: Vec<Symbol> = vec![
[INFO] [stdout] 228 | |         Symbol::LeftBrace, Symbol::RightBrace,
[INFO] [stdout] 229 | |         Symbol::LeftBracket, Symbol::RightBracket,
[INFO] [stdout] ...   |
[INFO] [stdout] 274 | |     static ref PATTERN_CHARS_AFTER_NEWLINE: Regex = Regex::new(r"\n[^\n]+$").unwrap();
[INFO] [stdout] 275 | | }
[INFO] [stdout]     | |_^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `__lazy_static_create` which comes from the expansion of the macro `lazy_static` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::sync::ONCE_INIT`: the `new` function is now preferred
[INFO] [stdout]    --> src/tokenizer.rs:226:1
[INFO] [stdout]     |
[INFO] [stdout] 226 | / lazy_static! {
[INFO] [stdout] 227 | |     static ref SYMBOLS: Vec<Symbol> = vec![
[INFO] [stdout] 228 | |         Symbol::LeftBrace, Symbol::RightBrace,
[INFO] [stdout] 229 | |         Symbol::LeftBracket, Symbol::RightBracket,
[INFO] [stdout] ...   |
[INFO] [stdout] 274 | |     static ref PATTERN_CHARS_AFTER_NEWLINE: Regex = Regex::new(r"\n[^\n]+$").unwrap();
[INFO] [stdout] 275 | | }
[INFO] [stdout]     | |_^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `__lazy_static_create` which comes from the expansion of the macro `lazy_static` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::sync::ONCE_INIT`: the `new` function is now preferred
[INFO] [stdout]    --> src/tokenizer.rs:226:1
[INFO] [stdout]     |
[INFO] [stdout] 226 | / lazy_static! {
[INFO] [stdout] 227 | |     static ref SYMBOLS: Vec<Symbol> = vec![
[INFO] [stdout] 228 | |         Symbol::LeftBrace, Symbol::RightBrace,
[INFO] [stdout] 229 | |         Symbol::LeftBracket, Symbol::RightBracket,
[INFO] [stdout] ...   |
[INFO] [stdout] 274 | |     static ref PATTERN_CHARS_AFTER_NEWLINE: Regex = Regex::new(r"\n[^\n]+$").unwrap();
[INFO] [stdout] 275 | | }
[INFO] [stdout]     | |_^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `__lazy_static_create` which comes from the expansion of the macro `lazy_static` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::sync::ONCE_INIT`: the `new` function is now preferred
[INFO] [stdout]    --> src/tokenizer.rs:226:1
[INFO] [stdout]     |
[INFO] [stdout] 226 | / lazy_static! {
[INFO] [stdout] 227 | |     static ref SYMBOLS: Vec<Symbol> = vec![
[INFO] [stdout] 228 | |         Symbol::LeftBrace, Symbol::RightBrace,
[INFO] [stdout] 229 | |         Symbol::LeftBracket, Symbol::RightBracket,
[INFO] [stdout] ...   |
[INFO] [stdout] 274 | |     static ref PATTERN_CHARS_AFTER_NEWLINE: Regex = Regex::new(r"\n[^\n]+$").unwrap();
[INFO] [stdout] 275 | | }
[INFO] [stdout]     | |_^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `__lazy_static_create` which comes from the expansion of the macro `lazy_static` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::sync::ONCE_INIT`: the `new` function is now preferred
[INFO] [stdout]    --> src/tokenizer.rs:226:1
[INFO] [stdout]     |
[INFO] [stdout] 226 | / lazy_static! {
[INFO] [stdout] 227 | |     static ref SYMBOLS: Vec<Symbol> = vec![
[INFO] [stdout] 228 | |         Symbol::LeftBrace, Symbol::RightBrace,
[INFO] [stdout] 229 | |         Symbol::LeftBracket, Symbol::RightBracket,
[INFO] [stdout] ...   |
[INFO] [stdout] 274 | |     static ref PATTERN_CHARS_AFTER_NEWLINE: Regex = Regex::new(r"\n[^\n]+$").unwrap();
[INFO] [stdout] 275 | | }
[INFO] [stdout]     | |_^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `__lazy_static_create` which comes from the expansion of the macro `lazy_static` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::sync::ONCE_INIT`: the `new` function is now preferred
[INFO] [stdout]    --> src/tokenizer.rs:226:1
[INFO] [stdout]     |
[INFO] [stdout] 226 | / lazy_static! {
[INFO] [stdout] 227 | |     static ref SYMBOLS: Vec<Symbol> = vec![
[INFO] [stdout] 228 | |         Symbol::LeftBrace, Symbol::RightBrace,
[INFO] [stdout] 229 | |         Symbol::LeftBracket, Symbol::RightBracket,
[INFO] [stdout] ...   |
[INFO] [stdout] 274 | |     static ref PATTERN_CHARS_AFTER_NEWLINE: Regex = Regex::new(r"\n[^\n]+$").unwrap();
[INFO] [stdout] 275 | | }
[INFO] [stdout]     | |_^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `__lazy_static_create` which comes from the expansion of the macro `lazy_static` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::sync::ONCE_INIT`: the `new` function is now preferred
[INFO] [stdout]    --> src/tokenizer.rs:226:1
[INFO] [stdout]     |
[INFO] [stdout] 226 | / lazy_static! {
[INFO] [stdout] 227 | |     static ref SYMBOLS: Vec<Symbol> = vec![
[INFO] [stdout] 228 | |         Symbol::LeftBrace, Symbol::RightBrace,
[INFO] [stdout] 229 | |         Symbol::LeftBracket, Symbol::RightBracket,
[INFO] [stdout] ...   |
[INFO] [stdout] 274 | |     static ref PATTERN_CHARS_AFTER_NEWLINE: Regex = Regex::new(r"\n[^\n]+$").unwrap();
[INFO] [stdout] 275 | | }
[INFO] [stdout]     | |_^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `__lazy_static_create` which comes from the expansion of the macro `lazy_static` (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/emitter.rs:5:31
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub fn emit_chunk<'a>(w: &mut Write, chunk: &Chunk<'a>) -> fmt::Result {
[INFO] [stdout]   |                               ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]   = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]   = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub fn emit_chunk<'a>(w: &mut dyn Write, chunk: &Chunk<'a>) -> fmt::Result {
[INFO] [stdout]   |                               +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/emitter.rs:13:31
[INFO] [stdout]    |
[INFO] [stdout] 13 | fn emit_statement<'a>(w: &mut Write, statement: &Statement<'a>) -> fmt::Result {
[INFO] [stdout]    |                               ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 13 | fn emit_statement<'a>(w: &mut dyn Write, statement: &Statement<'a>) -> fmt::Result {
[INFO] [stdout]    |                               +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/emitter.rs:29:32
[INFO] [stdout]    |
[INFO] [stdout] 29 | fn emit_assignment<'a>(w: &mut Write, _assignment: &Assignment<'a>) -> fmt::Result {
[INFO] [stdout]    |                                ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 29 | fn emit_assignment<'a>(w: &mut dyn Write, _assignment: &Assignment<'a>) -> fmt::Result {
[INFO] [stdout]    |                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/emitter.rs:35:38
[INFO] [stdout]    |
[INFO] [stdout] 35 | fn emit_local_assignment<'a>(w: &mut Write, _assignment: &LocalAssignment<'a>) -> fmt::Result {
[INFO] [stdout]    |                                      ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 35 | fn emit_local_assignment<'a>(w: &mut dyn Write, _assignment: &LocalAssignment<'a>) -> fmt::Result {
[INFO] [stdout]    |                                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/emitter.rs:41:35
[INFO] [stdout]    |
[INFO] [stdout] 41 | fn emit_function_call<'a>(w: &mut Write, _function_call: &FunctionCall<'a>) -> fmt::Result {
[INFO] [stdout]    |                                   ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 41 | fn emit_function_call<'a>(w: &mut dyn Write, _function_call: &FunctionCall<'a>) -> fmt::Result {
[INFO] [stdout]    |                                   +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/emitter.rs:47:33
[INFO] [stdout]    |
[INFO] [stdout] 47 | fn emit_numeric_for<'a>(w: &mut Write, _numeric_for: &NumericFor<'a>) -> fmt::Result {
[INFO] [stdout]    |                                 ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 47 | fn emit_numeric_for<'a>(w: &mut dyn Write, _numeric_for: &NumericFor<'a>) -> fmt::Result {
[INFO] [stdout]    |                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/emitter.rs:53:33
[INFO] [stdout]    |
[INFO] [stdout] 53 | fn emit_generic_for<'a>(w: &mut Write, _generic_for: &GenericFor<'a>) -> fmt::Result {
[INFO] [stdout]    |                                 ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 53 | fn emit_generic_for<'a>(w: &mut dyn Write, _generic_for: &GenericFor<'a>) -> fmt::Result {
[INFO] [stdout]    |                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/emitter.rs:59:34
[INFO] [stdout]    |
[INFO] [stdout] 59 | fn emit_if_statement<'a>(w: &mut Write, _if_statement: &IfStatement<'a>) -> fmt::Result {
[INFO] [stdout]    |                                  ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 59 | fn emit_if_statement<'a>(w: &mut dyn Write, _if_statement: &IfStatement<'a>) -> fmt::Result {
[INFO] [stdout]    |                                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/emitter.rs:65:32
[INFO] [stdout]    |
[INFO] [stdout] 65 | fn emit_while_loop<'a>(w: &mut Write, _while_loop: &WhileLoop<'a>) -> fmt::Result {
[INFO] [stdout]    |                                ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 65 | fn emit_while_loop<'a>(w: &mut dyn Write, _while_loop: &WhileLoop<'a>) -> fmt::Result {
[INFO] [stdout]    |                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/emitter.rs:71:33
[INFO] [stdout]    |
[INFO] [stdout] 71 | fn emit_repeat_loop<'a>(w: &mut Write, _repeat_loop: &RepeatLoop<'a>) -> fmt::Result {
[INFO] [stdout]    |                                 ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 71 | fn emit_repeat_loop<'a>(w: &mut dyn Write, _repeat_loop: &RepeatLoop<'a>) -> fmt::Result {
[INFO] [stdout]    |                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/emitter.rs:77:42
[INFO] [stdout]    |
[INFO] [stdout] 77 | fn emit_function_declaration<'a>(w: &mut Write, _function_declaration: &FunctionDeclaration<'a>) -> fmt::Result {
[INFO] [stdout]    |                                          ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 77 | fn emit_function_declaration<'a>(w: &mut dyn Write, _function_declaration: &FunctionDeclaration<'a>) -> fmt::Result {
[INFO] [stdout]    |                                          +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 21 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling serde_json v1.0.17
[INFO] [stderr]    Compiling mab v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated constant `std::sync::ONCE_INIT`: the `new` function is now preferred
[INFO] [stdout]    --> src/tokenizer.rs:226:1
[INFO] [stdout]     |
[INFO] [stdout] 226 | / lazy_static! {
[INFO] [stdout] 227 | |     static ref SYMBOLS: Vec<Symbol> = vec![
[INFO] [stdout] 228 | |         Symbol::LeftBrace, Symbol::RightBrace,
[INFO] [stdout] 229 | |         Symbol::LeftBracket, Symbol::RightBracket,
[INFO] [stdout] ...   |
[INFO] [stdout] 274 | |     static ref PATTERN_CHARS_AFTER_NEWLINE: Regex = Regex::new(r"\n[^\n]+$").unwrap();
[INFO] [stdout] 275 | | }
[INFO] [stdout]     | |_^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout]     = note: this warning originates in the macro `__lazy_static_create` which comes from the expansion of the macro `lazy_static` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::sync::ONCE_INIT`: the `new` function is now preferred
[INFO] [stdout]    --> src/tokenizer.rs:226:1
[INFO] [stdout]     |
[INFO] [stdout] 226 | / lazy_static! {
[INFO] [stdout] 227 | |     static ref SYMBOLS: Vec<Symbol> = vec![
[INFO] [stdout] 228 | |         Symbol::LeftBrace, Symbol::RightBrace,
[INFO] [stdout] 229 | |         Symbol::LeftBracket, Symbol::RightBracket,
[INFO] [stdout] ...   |
[INFO] [stdout] 274 | |     static ref PATTERN_CHARS_AFTER_NEWLINE: Regex = Regex::new(r"\n[^\n]+$").unwrap();
[INFO] [stdout] 275 | | }
[INFO] [stdout]     | |_^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `__lazy_static_create` which comes from the expansion of the macro `lazy_static` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::sync::ONCE_INIT`: the `new` function is now preferred
[INFO] [stdout]    --> src/tokenizer.rs:226:1
[INFO] [stdout]     |
[INFO] [stdout] 226 | / lazy_static! {
[INFO] [stdout] 227 | |     static ref SYMBOLS: Vec<Symbol> = vec![
[INFO] [stdout] 228 | |         Symbol::LeftBrace, Symbol::RightBrace,
[INFO] [stdout] 229 | |         Symbol::LeftBracket, Symbol::RightBracket,
[INFO] [stdout] ...   |
[INFO] [stdout] 274 | |     static ref PATTERN_CHARS_AFTER_NEWLINE: Regex = Regex::new(r"\n[^\n]+$").unwrap();
[INFO] [stdout] 275 | | }
[INFO] [stdout]     | |_^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `__lazy_static_create` which comes from the expansion of the macro `lazy_static` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::sync::ONCE_INIT`: the `new` function is now preferred
[INFO] [stdout]    --> src/tokenizer.rs:226:1
[INFO] [stdout]     |
[INFO] [stdout] 226 | / lazy_static! {
[INFO] [stdout] 227 | |     static ref SYMBOLS: Vec<Symbol> = vec![
[INFO] [stdout] 228 | |         Symbol::LeftBrace, Symbol::RightBrace,
[INFO] [stdout] 229 | |         Symbol::LeftBracket, Symbol::RightBracket,
[INFO] [stdout] ...   |
[INFO] [stdout] 274 | |     static ref PATTERN_CHARS_AFTER_NEWLINE: Regex = Regex::new(r"\n[^\n]+$").unwrap();
[INFO] [stdout] 275 | | }
[INFO] [stdout]     | |_^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `__lazy_static_create` which comes from the expansion of the macro `lazy_static` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::sync::ONCE_INIT`: the `new` function is now preferred
[INFO] [stdout]    --> src/tokenizer.rs:226:1
[INFO] [stdout]     |
[INFO] [stdout] 226 | / lazy_static! {
[INFO] [stdout] 227 | |     static ref SYMBOLS: Vec<Symbol> = vec![
[INFO] [stdout] 228 | |         Symbol::LeftBrace, Symbol::RightBrace,
[INFO] [stdout] 229 | |         Symbol::LeftBracket, Symbol::RightBracket,
[INFO] [stdout] ...   |
[INFO] [stdout] 274 | |     static ref PATTERN_CHARS_AFTER_NEWLINE: Regex = Regex::new(r"\n[^\n]+$").unwrap();
[INFO] [stdout] 275 | | }
[INFO] [stdout]     | |_^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `__lazy_static_create` which comes from the expansion of the macro `lazy_static` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::sync::ONCE_INIT`: the `new` function is now preferred
[INFO] [stdout]    --> src/tokenizer.rs:226:1
[INFO] [stdout]     |
[INFO] [stdout] 226 | / lazy_static! {
[INFO] [stdout] 227 | |     static ref SYMBOLS: Vec<Symbol> = vec![
[INFO] [stdout] 228 | |         Symbol::LeftBrace, Symbol::RightBrace,
[INFO] [stdout] 229 | |         Symbol::LeftBracket, Symbol::RightBracket,
[INFO] [stdout] ...   |
[INFO] [stdout] 274 | |     static ref PATTERN_CHARS_AFTER_NEWLINE: Regex = Regex::new(r"\n[^\n]+$").unwrap();
[INFO] [stdout] 275 | | }
[INFO] [stdout]     | |_^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `__lazy_static_create` which comes from the expansion of the macro `lazy_static` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::sync::ONCE_INIT`: the `new` function is now preferred
[INFO] [stdout]    --> src/tokenizer.rs:226:1
[INFO] [stdout]     |
[INFO] [stdout] 226 | / lazy_static! {
[INFO] [stdout] 227 | |     static ref SYMBOLS: Vec<Symbol> = vec![
[INFO] [stdout] 228 | |         Symbol::LeftBrace, Symbol::RightBrace,
[INFO] [stdout] 229 | |         Symbol::LeftBracket, Symbol::RightBracket,
[INFO] [stdout] ...   |
[INFO] [stdout] 274 | |     static ref PATTERN_CHARS_AFTER_NEWLINE: Regex = Regex::new(r"\n[^\n]+$").unwrap();
[INFO] [stdout] 275 | | }
[INFO] [stdout]     | |_^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `__lazy_static_create` which comes from the expansion of the macro `lazy_static` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::sync::ONCE_INIT`: the `new` function is now preferred
[INFO] [stdout]    --> src/tokenizer.rs:226:1
[INFO] [stdout]     |
[INFO] [stdout] 226 | / lazy_static! {
[INFO] [stdout] 227 | |     static ref SYMBOLS: Vec<Symbol> = vec![
[INFO] [stdout] 228 | |         Symbol::LeftBrace, Symbol::RightBrace,
[INFO] [stdout] 229 | |         Symbol::LeftBracket, Symbol::RightBracket,
[INFO] [stdout] ...   |
[INFO] [stdout] 274 | |     static ref PATTERN_CHARS_AFTER_NEWLINE: Regex = Regex::new(r"\n[^\n]+$").unwrap();
[INFO] [stdout] 275 | | }
[INFO] [stdout]     | |_^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `__lazy_static_create` which comes from the expansion of the macro `lazy_static` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::sync::ONCE_INIT`: the `new` function is now preferred
[INFO] [stdout]    --> src/tokenizer.rs:226:1
[INFO] [stdout]     |
[INFO] [stdout] 226 | / lazy_static! {
[INFO] [stdout] 227 | |     static ref SYMBOLS: Vec<Symbol> = vec![
[INFO] [stdout] 228 | |         Symbol::LeftBrace, Symbol::RightBrace,
[INFO] [stdout] 229 | |         Symbol::LeftBracket, Symbol::RightBracket,
[INFO] [stdout] ...   |
[INFO] [stdout] 274 | |     static ref PATTERN_CHARS_AFTER_NEWLINE: Regex = Regex::new(r"\n[^\n]+$").unwrap();
[INFO] [stdout] 275 | | }
[INFO] [stdout]     | |_^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `__lazy_static_create` which comes from the expansion of the macro `lazy_static` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::sync::ONCE_INIT`: the `new` function is now preferred
[INFO] [stdout]    --> src/tokenizer.rs:226:1
[INFO] [stdout]     |
[INFO] [stdout] 226 | / lazy_static! {
[INFO] [stdout] 227 | |     static ref SYMBOLS: Vec<Symbol> = vec![
[INFO] [stdout] 228 | |         Symbol::LeftBrace, Symbol::RightBrace,
[INFO] [stdout] 229 | |         Symbol::LeftBracket, Symbol::RightBracket,
[INFO] [stdout] ...   |
[INFO] [stdout] 274 | |     static ref PATTERN_CHARS_AFTER_NEWLINE: Regex = Regex::new(r"\n[^\n]+$").unwrap();
[INFO] [stdout] 275 | | }
[INFO] [stdout]     | |_^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `__lazy_static_create` which comes from the expansion of the macro `lazy_static` (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/emitter.rs:5:31
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub fn emit_chunk<'a>(w: &mut Write, chunk: &Chunk<'a>) -> fmt::Result {
[INFO] [stdout]   |                               ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]   = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]   = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub fn emit_chunk<'a>(w: &mut dyn Write, chunk: &Chunk<'a>) -> fmt::Result {
[INFO] [stdout]   |                               +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/emitter.rs:13:31
[INFO] [stdout]    |
[INFO] [stdout] 13 | fn emit_statement<'a>(w: &mut Write, statement: &Statement<'a>) -> fmt::Result {
[INFO] [stdout]    |                               ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 13 | fn emit_statement<'a>(w: &mut dyn Write, statement: &Statement<'a>) -> fmt::Result {
[INFO] [stdout]    |                               +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/emitter.rs:29:32
[INFO] [stdout]    |
[INFO] [stdout] 29 | fn emit_assignment<'a>(w: &mut Write, _assignment: &Assignment<'a>) -> fmt::Result {
[INFO] [stdout]    |                                ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 29 | fn emit_assignment<'a>(w: &mut dyn Write, _assignment: &Assignment<'a>) -> fmt::Result {
[INFO] [stdout]    |                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/emitter.rs:35:38
[INFO] [stdout]    |
[INFO] [stdout] 35 | fn emit_local_assignment<'a>(w: &mut Write, _assignment: &LocalAssignment<'a>) -> fmt::Result {
[INFO] [stdout]    |                                      ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 35 | fn emit_local_assignment<'a>(w: &mut dyn Write, _assignment: &LocalAssignment<'a>) -> fmt::Result {
[INFO] [stdout]    |                                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/emitter.rs:41:35
[INFO] [stdout]    |
[INFO] [stdout] 41 | fn emit_function_call<'a>(w: &mut Write, _function_call: &FunctionCall<'a>) -> fmt::Result {
[INFO] [stdout]    |                                   ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 41 | fn emit_function_call<'a>(w: &mut dyn Write, _function_call: &FunctionCall<'a>) -> fmt::Result {
[INFO] [stdout]    |                                   +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/emitter.rs:47:33
[INFO] [stdout]    |
[INFO] [stdout] 47 | fn emit_numeric_for<'a>(w: &mut Write, _numeric_for: &NumericFor<'a>) -> fmt::Result {
[INFO] [stdout]    |                                 ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 47 | fn emit_numeric_for<'a>(w: &mut dyn Write, _numeric_for: &NumericFor<'a>) -> fmt::Result {
[INFO] [stdout]    |                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/emitter.rs:53:33
[INFO] [stdout]    |
[INFO] [stdout] 53 | fn emit_generic_for<'a>(w: &mut Write, _generic_for: &GenericFor<'a>) -> fmt::Result {
[INFO] [stdout]    |                                 ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 53 | fn emit_generic_for<'a>(w: &mut dyn Write, _generic_for: &GenericFor<'a>) -> fmt::Result {
[INFO] [stdout]    |                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/emitter.rs:59:34
[INFO] [stdout]    |
[INFO] [stdout] 59 | fn emit_if_statement<'a>(w: &mut Write, _if_statement: &IfStatement<'a>) -> fmt::Result {
[INFO] [stdout]    |                                  ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 59 | fn emit_if_statement<'a>(w: &mut dyn Write, _if_statement: &IfStatement<'a>) -> fmt::Result {
[INFO] [stdout]    |                                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/emitter.rs:65:32
[INFO] [stdout]    |
[INFO] [stdout] 65 | fn emit_while_loop<'a>(w: &mut Write, _while_loop: &WhileLoop<'a>) -> fmt::Result {
[INFO] [stdout]    |                                ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 65 | fn emit_while_loop<'a>(w: &mut dyn Write, _while_loop: &WhileLoop<'a>) -> fmt::Result {
[INFO] [stdout]    |                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/emitter.rs:71:33
[INFO] [stdout]    |
[INFO] [stdout] 71 | fn emit_repeat_loop<'a>(w: &mut Write, _repeat_loop: &RepeatLoop<'a>) -> fmt::Result {
[INFO] [stdout]    |                                 ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 71 | fn emit_repeat_loop<'a>(w: &mut dyn Write, _repeat_loop: &RepeatLoop<'a>) -> fmt::Result {
[INFO] [stdout]    |                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/emitter.rs:77:42
[INFO] [stdout]    |
[INFO] [stdout] 77 | fn emit_function_declaration<'a>(w: &mut Write, _function_declaration: &FunctionDeclaration<'a>) -> fmt::Result {
[INFO] [stdout]    |                                          ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 77 | fn emit_function_declaration<'a>(w: &mut dyn Write, _function_declaration: &FunctionDeclaration<'a>) -> fmt::Result {
[INFO] [stdout]    |                                          +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 21 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 3.72s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: syn v0.13.7
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 2`
[INFO] running `Command { std: "docker" "inspect" "1593ab46cf63c11a3ab004688028a20f3ad31f5d794516808f5fe7245fa90cad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1593ab46cf63c11a3ab004688028a20f3ad31f5d794516808f5fe7245fa90cad", kill_on_drop: false }`
[INFO] [stdout] 1593ab46cf63c11a3ab004688028a20f3ad31f5d794516808f5fe7245fa90cad