[INFO] cloning repository https://github.com/panzi/rust-json-builder
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/panzi/rust-json-builder" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpanzi%2Frust-json-builder", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpanzi%2Frust-json-builder'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 55a32321d40ad0f6ff02f1fba733afca27c31991
[INFO] checking panzi/rust-json-builder against c60b92c03ca8a3b101eb9d57f51e2232690638c7 for pr-164148-crater-rollup
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpanzi%2Frust-json-builder" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/panzi/rust-json-builder
[INFO] finished tweaking git repo https://github.com/panzi/rust-json-builder
[INFO] tweaked toml for git repo https://github.com/panzi/rust-json-builder written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/panzi/rust-json-builder on toolchain c60b92c03ca8a3b101eb9d57f51e2232690638c7
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c60b92c03ca8a3b101eb9d57f51e2232690638c7" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/panzi/rust-json-builder 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" "+c60b92c03ca8a3b101eb9d57f51e2232690638c7" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: Cargo.toml: `package.edition` is unspecified, defaulting to `2015` while the latest is `2024`
[INFO] [stderr] warning: `json_builder` (manifest) generated 1 warning
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:77db811e55d90add9212f6832c23229e3de5f1c1f9905e8cb07319ea15df73ac" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 95a754f6094cd127cec31bf632f17dbc467769637fd639ee99ced992b3a706cb
[INFO] running `Command { std: "docker" "start" "95a754f6094cd127cec31bf632f17dbc467769637fd639ee99ced992b3a706cb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "95a754f6094cd127cec31bf632f17dbc467769637fd639ee99ced992b3a706cb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "95a754f6094cd127cec31bf632f17dbc467769637fd639ee99ced992b3a706cb" "/opt/rustwide/cargo-home/bin/cargo" "+c60b92c03ca8a3b101eb9d57f51e2232690638c7" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "95a754f6094cd127cec31bf632f17dbc467769637fd639ee99ced992b3a706cb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-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" "-w" "/opt/rustwide/workdir" "--user" "0:0" "95a754f6094cd127cec31bf632f17dbc467769637fd639ee99ced992b3a706cb" "/opt/rustwide/cargo-home/bin/cargo" "+c60b92c03ca8a3b101eb9d57f51e2232690638c7" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] warning: Cargo.toml: `package.edition` is unspecified, defaulting to `2015` while the latest is `2024`
[INFO] [stderr] warning: `json_builder` (manifest) generated 1 warning
[INFO] [stderr]     Checking json_builder v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: reserved `doc` attribute `hide`
[INFO] [stdout]    --> src/json_builder.rs:510:7
[INFO] [stdout]     |
[INFO] [stdout] 510 | #[doc(hide)]
[INFO] [stdout]     |       ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/json_builder.rs:26:18
[INFO] [stdout]    |
[INFO] [stdout] 26 |     writer: &'a mut Write,
[INFO] [stdout]    |                     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 26 |     writer: &'a mut dyn Write,
[INFO] [stdout]    |                     +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/json_builder.rs:135:26
[INFO] [stdout]     |
[INFO] [stdout] 135 |     pub fn new(writer: &mut Write) -> JSONBuilder {
[INFO] [stdout]     |                             ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 135 |     pub fn new(writer: &mut dyn Write) -> JSONBuilder {
[INFO] [stdout]     |                             +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/json_builder.rs:144:33
[INFO] [stdout]     |
[INFO] [stdout] 144 |     pub fn new_pretty(writer: &mut Write, indent_size: usize, tab_indent: bool) -> JSONBuilder {
[INFO] [stdout]     |                                    ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 144 |     pub fn new_pretty(writer: &mut dyn Write, indent_size: usize, tab_indent: bool) -> JSONBuilder {
[INFO] [stdout]     |                                    +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/json_builder.rs:365:27
[INFO] [stdout]     |
[INFO] [stdout] 365 | impl<'a> IntoJSON for &'a IntoJSON {
[INFO] [stdout]     |                           ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 365 | impl<'a> IntoJSON for &'a dyn IntoJSON {
[INFO] [stdout]     |                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/json_builder.rs:66:42
[INFO] [stdout]    |
[INFO] [stdout] 66 | pub fn escape_json(s: &str, writer: &mut Write) -> std::io::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/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 66 | pub fn escape_json(s: &str, writer: &mut dyn Write) -> std::io::Result<()> {
[INFO] [stdout]    |                                          +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: reserved `doc` attribute `hide`
[INFO] [stdout]    --> src/json_builder.rs:510:7
[INFO] [stdout]     |
[INFO] [stdout] 510 | #[doc(hide)]
[INFO] [stdout]     |       ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/json_builder.rs:26:18
[INFO] [stdout]    |
[INFO] [stdout] 26 |     writer: &'a mut Write,
[INFO] [stdout]    |                     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 26 |     writer: &'a mut dyn Write,
[INFO] [stdout]    |                     +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/json_builder.rs:135:26
[INFO] [stdout]     |
[INFO] [stdout] 135 |     pub fn new(writer: &mut Write) -> JSONBuilder {
[INFO] [stdout]     |                             ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 135 |     pub fn new(writer: &mut dyn Write) -> JSONBuilder {
[INFO] [stdout]     |                             +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/json_builder.rs:144:33
[INFO] [stdout]     |
[INFO] [stdout] 144 |     pub fn new_pretty(writer: &mut Write, indent_size: usize, tab_indent: bool) -> JSONBuilder {
[INFO] [stdout]     |                                    ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 144 |     pub fn new_pretty(writer: &mut dyn Write, indent_size: usize, tab_indent: bool) -> JSONBuilder {
[INFO] [stdout]     |                                    +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/json_builder.rs:365:27
[INFO] [stdout]     |
[INFO] [stdout] 365 | impl<'a> IntoJSON for &'a IntoJSON {
[INFO] [stdout]     |                           ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 365 | impl<'a> IntoJSON for &'a dyn IntoJSON {
[INFO] [stdout]     |                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/json_builder.rs:66:42
[INFO] [stdout]    |
[INFO] [stdout] 66 | pub fn escape_json(s: &str, writer: &mut Write) -> std::io::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/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 66 | pub fn escape_json(s: &str, writer: &mut dyn Write) -> std::io::Result<()> {
[INFO] [stdout]    |                                          +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `json_builder` (bin "json_builder") due to 1 previous error; 5 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `json_builder` (bin "json_builder" test) due to 1 previous error; 5 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "95a754f6094cd127cec31bf632f17dbc467769637fd639ee99ced992b3a706cb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "95a754f6094cd127cec31bf632f17dbc467769637fd639ee99ced992b3a706cb", kill_on_drop: false }`
[INFO] [stdout] 95a754f6094cd127cec31bf632f17dbc467769637fd639ee99ced992b3a706cb
