[INFO] cloning repository https://github.com/jddf/jddf-codegen [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jddf/jddf-codegen" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjddf%2Fjddf-codegen", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjddf%2Fjddf-codegen'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 5320efebbc407f76793129d008a3ab218c6fa57c [INFO] checking jddf/jddf-codegen against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjddf%2Fjddf-codegen" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/jddf/jddf-codegen 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/jddf/jddf-codegen [INFO] finished tweaking git repo https://github.com/jddf/jddf-codegen [INFO] tweaked toml for git repo https://github.com/jddf/jddf-codegen written to /workspace/builds/worker-0-tc1/source/Cargo.toml [INFO] crate git repo https://github.com/jddf/jddf-codegen 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 }` [INFO] [stderr] Updating crates.io index [INFO] [stderr] Downloading crates ... [INFO] [stderr] Downloaded json-pointer v0.3.2 [INFO] [stderr] Downloaded jddf v0.3.0 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 7635279d1e25bc0f7d89f5c5072ea7f1aef5d3972a06e6770b15dbda196d4a8f [INFO] running `Command { std: "docker" "start" "-a" "7635279d1e25bc0f7d89f5c5072ea7f1aef5d3972a06e6770b15dbda196d4a8f", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "7635279d1e25bc0f7d89f5c5072ea7f1aef5d3972a06e6770b15dbda196d4a8f", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "7635279d1e25bc0f7d89f5c5072ea7f1aef5d3972a06e6770b15dbda196d4a8f", kill_on_drop: false }` [INFO] [stdout] 7635279d1e25bc0f7d89f5c5072ea7f1aef5d3972a06e6770b15dbda196d4a8f [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 25531da93a813cbbfa9cc79c677b16ab60d89ae4fc4e64b947ad45dbbe3bda81 [INFO] running `Command { std: "docker" "start" "-a" "25531da93a813cbbfa9cc79c677b16ab60d89ae4fc4e64b947ad45dbbe3bda81", kill_on_drop: false }` [INFO] [stderr] Compiling libc v0.2.62 [INFO] [stderr] Compiling proc-macro2 v1.0.3 [INFO] [stderr] Compiling unicode-xid v0.2.0 [INFO] [stderr] Compiling proc-macro2 v0.4.30 [INFO] [stderr] Compiling autocfg v0.1.6 [INFO] [stderr] Compiling syn v1.0.5 [INFO] [stderr] Compiling unicode-xid v0.1.0 [INFO] [stderr] Compiling syn v0.15.44 [INFO] [stderr] Compiling cc v1.0.45 [INFO] [stderr] Compiling memchr v2.2.1 [INFO] [stderr] Compiling ryu v1.0.0 [INFO] [stderr] Compiling serde v1.0.99 [INFO] [stderr] Compiling failure_derive v0.1.5 [INFO] [stderr] Checking itoa v0.4.4 [INFO] [stderr] Compiling bitflags v1.1.0 [INFO] [stderr] Checking rustc-demangle v0.1.16 [INFO] [stderr] Checking cfg-if v0.1.9 [INFO] [stderr] Checking thread_local v0.3.6 [INFO] [stderr] Checking regex-syntax v0.6.12 [INFO] [stderr] Checking unicode-width v0.1.6 [INFO] [stderr] Checking vec_map v0.8.1 [INFO] [stderr] Checking textwrap v0.11.0 [INFO] [stderr] Compiling num-traits v0.2.8 [INFO] [stderr] Compiling num-integer v0.1.41 [INFO] [stderr] Compiling backtrace-sys v0.1.31 [INFO] [stderr] Checking aho-corasick v0.7.6 [INFO] [stderr] Compiling quote v0.6.13 [INFO] [stderr] Checking time v0.1.42 [INFO] [stderr] Checking atty v0.2.13 [INFO] [stderr] Compiling quote v1.0.2 [INFO] [stderr] Checking clap v2.33.0 [INFO] [stderr] Checking chrono v0.4.9 [INFO] [stderr] Checking backtrace v0.3.37 [INFO] [stderr] Checking regex v1.3.1 [INFO] [stderr] Checking Inflector v0.11.4 [INFO] [stderr] Compiling synstructure v0.10.2 [INFO] [stderr] Compiling serde_derive v1.0.99 [INFO] [stderr] Checking failure v0.1.5 [INFO] [stderr] Checking serde_json v1.0.40 [INFO] [stderr] Checking json-pointer v0.3.2 [INFO] [stderr] Checking jddf v0.3.0 [INFO] [stderr] Checking jddf-codegen v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> src/targets/golang.rs:270:37 [INFO] [stdout] | [INFO] [stdout] 270 | fn serialize_ast(&self, w: &mut Write, ast: &Ast) -> Result<(), Error> { [INFO] [stdout] | ^^^^^ [INFO] [stdout] | [INFO] [stdout] = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021! [INFO] [stdout] = note: for more information, see [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] 270 | fn serialize_ast(&self, w: &mut dyn Write, ast: &Ast) -> Result<(), Error> { [INFO] [stdout] | +++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> src/targets/typescript.rs:188:37 [INFO] [stdout] | [INFO] [stdout] 188 | fn serialize_ast(&self, w: &mut Write, ast: &Ast) -> Result<(), Error> { [INFO] [stdout] | ^^^^^ [INFO] [stdout] | [INFO] [stdout] = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021! [INFO] [stdout] = note: for more information, see [INFO] [stdout] help: if this is an object-safe trait, use `dyn` [INFO] [stdout] | [INFO] [stdout] 188 | fn serialize_ast(&self, w: &mut dyn Write, ast: &Ast) -> Result<(), Error> { [INFO] [stdout] | +++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> src/targets/golang.rs:270:37 [INFO] [stdout] | [INFO] [stdout] 270 | fn serialize_ast(&self, w: &mut Write, ast: &Ast) -> Result<(), Error> { [INFO] [stdout] | ^^^^^ [INFO] [stdout] | [INFO] [stdout] = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021! [INFO] [stdout] = note: for more information, see [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] 270 | fn serialize_ast(&self, w: &mut dyn Write, ast: &Ast) -> Result<(), Error> { [INFO] [stdout] | +++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> src/targets/typescript.rs:188:37 [INFO] [stdout] | [INFO] [stdout] 188 | fn serialize_ast(&self, w: &mut Write, ast: &Ast) -> Result<(), Error> { [INFO] [stdout] | ^^^^^ [INFO] [stdout] | [INFO] [stdout] = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021! [INFO] [stdout] = note: for more information, see [INFO] [stdout] help: if this is an object-safe trait, use `dyn` [INFO] [stdout] | [INFO] [stdout] 188 | fn serialize_ast(&self, w: &mut dyn Write, ast: &Ast) -> Result<(), Error> { [INFO] [stdout] | +++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 2 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 2 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 18.55s [INFO] running `Command { std: "docker" "inspect" "25531da93a813cbbfa9cc79c677b16ab60d89ae4fc4e64b947ad45dbbe3bda81", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "25531da93a813cbbfa9cc79c677b16ab60d89ae4fc4e64b947ad45dbbe3bda81", kill_on_drop: false }` [INFO] [stdout] 25531da93a813cbbfa9cc79c677b16ab60d89ae4fc4e64b947ad45dbbe3bda81 [INFO] checking jddf/jddf-codegen against try#645bb72776a6a56a1a8f52631a44bd082b2ba509 for absurd-question-mark-desugar [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjddf%2Fjddf-codegen" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/jddf/jddf-codegen on toolchain 645bb72776a6a56a1a8f52631a44bd082b2ba509 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/jddf/jddf-codegen [INFO] finished tweaking git repo https://github.com/jddf/jddf-codegen [INFO] tweaked toml for git repo https://github.com/jddf/jddf-codegen written to /workspace/builds/worker-0-tc2/source/Cargo.toml [INFO] crate git repo https://github.com/jddf/jddf-codegen 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" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 244e4b04afca10c719247f958648acd2e10145ba1f19d8eecd4ef2b52e550812 [INFO] running `Command { std: "docker" "start" "-a" "244e4b04afca10c719247f958648acd2e10145ba1f19d8eecd4ef2b52e550812", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "244e4b04afca10c719247f958648acd2e10145ba1f19d8eecd4ef2b52e550812", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "244e4b04afca10c719247f958648acd2e10145ba1f19d8eecd4ef2b52e550812", kill_on_drop: false }` [INFO] [stdout] 244e4b04afca10c719247f958648acd2e10145ba1f19d8eecd4ef2b52e550812 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] c45fc1b67a27fe6df8f64c9827ffd750f940fa6c085ea7125649561c2ed85f74 [INFO] running `Command { std: "docker" "start" "-a" "c45fc1b67a27fe6df8f64c9827ffd750f940fa6c085ea7125649561c2ed85f74", kill_on_drop: false }` [INFO] [stderr] Compiling libc v0.2.62 [INFO] [stderr] Compiling proc-macro2 v1.0.3 [INFO] [stderr] Compiling unicode-xid v0.2.0 [INFO] [stderr] Compiling proc-macro2 v0.4.30 [INFO] [stderr] Compiling autocfg v0.1.6 [INFO] [stderr] Compiling syn v1.0.5 [INFO] [stderr] Compiling unicode-xid v0.1.0 [INFO] [stderr] Compiling cc v1.0.45 [INFO] [stderr] Compiling syn v0.15.44 [INFO] [stderr] Compiling memchr v2.2.1 [INFO] [stderr] Compiling serde v1.0.99 [INFO] [stderr] Compiling ryu v1.0.0 [INFO] [stderr] Compiling failure_derive v0.1.5 [INFO] [stderr] Checking rustc-demangle v0.1.16 [INFO] [stderr] Checking itoa v0.4.4 [INFO] [stderr] Compiling bitflags v1.1.0 [INFO] [stderr] Checking cfg-if v0.1.9 [INFO] [stderr] Checking thread_local v0.3.6 [INFO] [stderr] Checking unicode-width v0.1.6 [INFO] [stderr] Checking regex-syntax v0.6.12 [INFO] [stderr] Checking textwrap v0.11.0 [INFO] [stderr] Checking vec_map v0.8.1 [INFO] [stderr] Compiling num-traits v0.2.8 [INFO] [stderr] Compiling num-integer v0.1.41 [INFO] [stderr] Compiling backtrace-sys v0.1.31 [INFO] [stderr] Checking aho-corasick v0.7.6 [INFO] [stderr] Compiling quote v1.0.2 [INFO] [stderr] Compiling quote v0.6.13 [INFO] [stderr] Checking time v0.1.42 [INFO] [stderr] Checking atty v0.2.13 [INFO] [stderr] Checking clap v2.33.0 [INFO] [stderr] Checking chrono v0.4.9 [INFO] [stderr] Checking backtrace v0.3.37 [INFO] [stderr] Checking regex v1.3.1 [INFO] [stderr] Compiling synstructure v0.10.2 [INFO] [stderr] Checking Inflector v0.11.4 [INFO] [stderr] Compiling serde_derive v1.0.99 [INFO] [stderr] Checking failure v0.1.5 [INFO] [stderr] Checking serde_json v1.0.40 [INFO] [stderr] Checking json-pointer v0.3.2 [INFO] [stderr] Checking jddf v0.3.0 [INFO] [stderr] Checking jddf-codegen v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> src/targets/golang.rs:270:37 [INFO] [stdout] | [INFO] [stdout] 270 | fn serialize_ast(&self, w: &mut Write, ast: &Ast) -> Result<(), Error> { [INFO] [stdout] | ^^^^^ [INFO] [stdout] | [INFO] [stdout] = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021! [INFO] [stdout] = note: for more information, see [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] 270 | fn serialize_ast(&self, w: &mut dyn Write, ast: &Ast) -> Result<(), Error> { [INFO] [stdout] | +++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> src/targets/typescript.rs:188:37 [INFO] [stdout] | [INFO] [stdout] 188 | fn serialize_ast(&self, w: &mut Write, ast: &Ast) -> Result<(), Error> { [INFO] [stdout] | ^^^^^ [INFO] [stdout] | [INFO] [stdout] = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021! [INFO] [stdout] = note: for more information, see [INFO] [stdout] help: if this is an object-safe trait, use `dyn` [INFO] [stdout] | [INFO] [stdout] 188 | fn serialize_ast(&self, w: &mut dyn Write, ast: &Ast) -> Result<(), Error> { [INFO] [stdout] | +++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> src/targets/golang.rs:270:37 [INFO] [stdout] | [INFO] [stdout] 270 | fn serialize_ast(&self, w: &mut Write, ast: &Ast) -> Result<(), Error> { [INFO] [stdout] | ^^^^^ [INFO] [stdout] | [INFO] [stdout] = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021! [INFO] [stdout] = note: for more information, see [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] 270 | fn serialize_ast(&self, w: &mut dyn Write, ast: &Ast) -> Result<(), Error> { [INFO] [stdout] | +++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> src/targets/typescript.rs:188:37 [INFO] [stdout] | [INFO] [stdout] 188 | fn serialize_ast(&self, w: &mut Write, ast: &Ast) -> Result<(), Error> { [INFO] [stdout] | ^^^^^ [INFO] [stdout] | [INFO] [stdout] = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021! [INFO] [stdout] = note: for more information, see [INFO] [stdout] help: if this is an object-safe trait, use `dyn` [INFO] [stdout] | [INFO] [stdout] 188 | fn serialize_ast(&self, w: &mut dyn Write, ast: &Ast) -> Result<(), Error> { [INFO] [stdout] | +++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 2 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 2 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 18.15s [INFO] running `Command { std: "docker" "inspect" "c45fc1b67a27fe6df8f64c9827ffd750f940fa6c085ea7125649561c2ed85f74", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "c45fc1b67a27fe6df8f64c9827ffd750f940fa6c085ea7125649561c2ed85f74", kill_on_drop: false }` [INFO] [stdout] c45fc1b67a27fe6df8f64c9827ffd750f940fa6c085ea7125649561c2ed85f74