[INFO] fetching crate tiny-json 0.0.1...
[INFO] testing tiny-json-0.0.1 against beta-2026-04-21 for beta-1.96-2
[INFO] extracting crate tiny-json 0.0.1 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate tiny-json 0.0.1
[INFO] finished tweaking crates.io crate tiny-json 0.0.1
[INFO] tweaked toml for crates.io crate tiny-json 0.0.1 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate tiny-json 0.0.1 on toolchain beta-2026-04-21
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-04-21" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-04-21" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-04-21" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 81175fc3d3affcb0bf7d84793f25f8a10bc08074a0889cc92e6a7db9c183a9c6
[INFO] running `Command { std: "docker" "start" "-a" "81175fc3d3affcb0bf7d84793f25f8a10bc08074a0889cc92e6a7db9c183a9c6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "81175fc3d3affcb0bf7d84793f25f8a10bc08074a0889cc92e6a7db9c183a9c6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "81175fc3d3affcb0bf7d84793f25f8a10bc08074a0889cc92e6a7db9c183a9c6", kill_on_drop: false }`
[INFO] [stdout] 81175fc3d3affcb0bf7d84793f25f8a10bc08074a0889cc92e6a7db9c183a9c6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 37a2b9acfb757a18a083388a65ead7aedef21717bc33f59911bee24a1f894793
[INFO] running `Command { std: "docker" "start" "-a" "37a2b9acfb757a18a083388a65ead7aedef21717bc33f59911bee24a1f894793", kill_on_drop: false }`
[INFO] [stderr]    Compiling tiny-json v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::fmt::Pointer`
[INFO] [stdout]  --> src/node.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::fmt::Pointer;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Display` and `Formatter`
[INFO] [stdout]  --> src/token.rs:1:16
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::fmt::{Display, Formatter};
[INFO] [stdout]   |                ^^^^^^^  ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::util::*`
[INFO] [stdout]  --> src/parser.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use crate::util::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `NodeType`
[INFO] [stdout]  --> src/walk.rs:2:36
[INFO] [stdout]   |
[INFO] [stdout] 2 | use crate::node::{Node, NodeChild, NodeType};
[INFO] [stdout]   |                                    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::ops::Deref`
[INFO] [stdout]  --> src/stringifier.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::ops::Deref;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::walk::walk`
[INFO] [stdout]  --> src/stringifier.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use crate::walk::walk;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]   --> src/stringifier.rs:46:17
[INFO] [stdout]    |
[INFO] [stdout] 46 |                 ;
[INFO] [stdout]    |                 ^ help: remove this semicolon
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(redundant_semicolons)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]   --> src/stringifier.rs:61:17
[INFO] [stdout]    |
[INFO] [stdout] 61 |                 ;
[INFO] [stdout]    |                 ^ help: remove this semicolon
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `msg` is never read
[INFO] [stdout]    --> src/util.rs:133:23
[INFO] [stdout]     |
[INFO] [stdout] 133 |         let mut msg = String::new();
[INFO] [stdout]     |                       ^^^^^^^^^^^^^ this value is reassigned later and never used
[INFO] [stdout] ...
[INFO] [stdout] 138 |             msg = format!(
[INFO] [stdout]     |             --- `msg` is overwritten here before the previous value is read
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/walk.rs:18:26
[INFO] [stdout]    |
[INFO] [stdout] 18 |         NodeChild::Value(x) => {
[INFO] [stdout]    |                          ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/stringifier.rs:49:21
[INFO] [stdout]    |
[INFO] [stdout] 49 |                 let mut str = key_str;
[INFO] [stdout]    |                     ----^^^
[INFO] [stdout]    |                     |
[INFO] [stdout]    |                     help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `str`
[INFO] [stdout]   --> src/stringifier.rs:49:21
[INFO] [stdout]    |
[INFO] [stdout] 49 |                 let mut str = key_str;
[INFO] [stdout]    |                     ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_str`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/util.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout]  9 | impl Position {
[INFO] [stdout]    | ------------- associated function in this implementation
[INFO] [stdout] 10 |     pub fn new(line: usize, column: usize) -> Position {
[INFO] [stdout]    |            ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `input` is never read
[INFO] [stdout]  --> src/parser.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub struct Parser {
[INFO] [stdout]   |            ------ field in this struct
[INFO] [stdout] 6 |     pub input: String,
[INFO] [stdout]   |         ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/util.rs:146:16
[INFO] [stdout]     |
[INFO] [stdout] 146 |         panic!(msg);
[INFO] [stdout]     |                ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this usage of `panic!()` is deprecated; it will be a hard error in Rust 2021
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stdout]     = note: `#[warn(non_fmt_panics)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stdout] help: add a "{}" format string to `Display` the message
[INFO] [stdout]     |
[INFO] [stdout] 146 |         panic!("{}", msg);
[INFO] [stdout]     |                +++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/util.rs:163:16
[INFO] [stdout]     |
[INFO] [stdout] 163 |         panic!(msg);
[INFO] [stdout]     |                ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this usage of `panic!()` is deprecated; it will be a hard error in Rust 2021
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stdout] help: add a "{}" format string to `Display` the message
[INFO] [stdout]     |
[INFO] [stdout] 163 |         panic!("{}", msg);
[INFO] [stdout]     |                +++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/util.rs:179:16
[INFO] [stdout]     |
[INFO] [stdout] 179 |         panic!(msg);
[INFO] [stdout]     |                ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this usage of `panic!()` is deprecated; it will be a hard error in Rust 2021
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stdout] help: add a "{}" format string to `Display` the message
[INFO] [stdout]     |
[INFO] [stdout] 179 |         panic!("{}", msg);
[INFO] [stdout]     |                +++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.32s
[INFO] running `Command { std: "docker" "inspect" "37a2b9acfb757a18a083388a65ead7aedef21717bc33f59911bee24a1f894793", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "37a2b9acfb757a18a083388a65ead7aedef21717bc33f59911bee24a1f894793", kill_on_drop: false }`
[INFO] [stdout] 37a2b9acfb757a18a083388a65ead7aedef21717bc33f59911bee24a1f894793
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 78e1ac7843ba308d9ce2b0fa77cdda572be8f2ca060e24225f75537daf5d6c45
[INFO] running `Command { std: "docker" "start" "-a" "78e1ac7843ba308d9ce2b0fa77cdda572be8f2ca060e24225f75537daf5d6c45", kill_on_drop: false }`
[INFO] [stdout] warning: unused import: `std::fmt::Pointer`
[INFO] [stdout]  --> src/node.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::fmt::Pointer;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Display` and `Formatter`
[INFO] [stdout]  --> src/token.rs:1:16
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::fmt::{Display, Formatter};
[INFO] [stdout]   |                ^^^^^^^  ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::util::*`
[INFO] [stdout]  --> src/parser.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use crate::util::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `NodeType`
[INFO] [stdout]  --> src/walk.rs:2:36
[INFO] [stdout]   |
[INFO] [stdout] 2 | use crate::node::{Node, NodeChild, NodeType};
[INFO] [stdout]   |                                    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::ops::Deref`
[INFO] [stdout]  --> src/stringifier.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::ops::Deref;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::walk::walk`
[INFO] [stdout]  --> src/stringifier.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use crate::walk::walk;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]   --> src/stringifier.rs:46:17
[INFO] [stdout]    |
[INFO] [stdout] 46 |                 ;
[INFO] [stdout]    |                 ^ help: remove this semicolon
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(redundant_semicolons)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]   --> src/stringifier.rs:61:17
[INFO] [stdout]    |
[INFO] [stdout] 61 |                 ;
[INFO] [stdout]    |                 ^ help: remove this semicolon
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `msg` is never read
[INFO] [stdout]    --> src/util.rs:133:23
[INFO] [stdout]     |
[INFO] [stdout] 133 |         let mut msg = String::new();
[INFO] [stdout]     |                       ^^^^^^^^^^^^^ this value is reassigned later and never used
[INFO] [stdout] ...
[INFO] [stdout] 138 |             msg = format!(
[INFO] [stdout]     |             --- `msg` is overwritten here before the previous value is read
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/walk.rs:18:26
[INFO] [stdout]    |
[INFO] [stdout] 18 |         NodeChild::Value(x) => {
[INFO] [stdout]    |                          ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/stringifier.rs:49:21
[INFO] [stdout]    |
[INFO] [stdout] 49 |                 let mut str = key_str;
[INFO] [stdout]    |                     ----^^^
[INFO] [stdout]    |                     |
[INFO] [stdout]    |                     help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `str`
[INFO] [stdout]   --> src/stringifier.rs:49:21
[INFO] [stdout]    |
[INFO] [stdout] 49 |                 let mut str = key_str;
[INFO] [stdout]    |                     ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_str`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/util.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout]  9 | impl Position {
[INFO] [stdout]    | ------------- associated function in this implementation
[INFO] [stdout] 10 |     pub fn new(line: usize, column: usize) -> Position {
[INFO] [stdout]    |            ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `input` is never read
[INFO] [stdout]  --> src/parser.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub struct Parser {
[INFO] [stdout]   |            ------ field in this struct
[INFO] [stdout] 6 |     pub input: String,
[INFO] [stdout]   |         ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/util.rs:146:16
[INFO] [stdout]     |
[INFO] [stdout] 146 |         panic!(msg);
[INFO] [stdout]     |                ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this usage of `panic!()` is deprecated; it will be a hard error in Rust 2021
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stdout]     = note: `#[warn(non_fmt_panics)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stdout] help: add a "{}" format string to `Display` the message
[INFO] [stdout]     |
[INFO] [stdout] 146 |         panic!("{}", msg);
[INFO] [stdout]     |                +++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/util.rs:163:16
[INFO] [stdout]     |
[INFO] [stdout] 163 |         panic!(msg);
[INFO] [stdout]     |                ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this usage of `panic!()` is deprecated; it will be a hard error in Rust 2021
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stdout] help: add a "{}" format string to `Display` the message
[INFO] [stdout]     |
[INFO] [stdout] 163 |         panic!("{}", msg);
[INFO] [stdout]     |                +++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/util.rs:179:16
[INFO] [stdout]     |
[INFO] [stdout] 179 |         panic!(msg);
[INFO] [stdout]     |                ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this usage of `panic!()` is deprecated; it will be a hard error in Rust 2021
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stdout] help: add a "{}" format string to `Display` the message
[INFO] [stdout]     |
[INFO] [stdout] 179 |         panic!("{}", msg);
[INFO] [stdout]     |                +++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling tiny-json v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::fmt::Pointer`
[INFO] [stdout]  --> src/node.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::fmt::Pointer;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Display` and `Formatter`
[INFO] [stdout]  --> src/token.rs:1:16
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::fmt::{Display, Formatter};
[INFO] [stdout]   |                ^^^^^^^  ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::util::*`
[INFO] [stdout]  --> src/parser.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use crate::util::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `NodeType`
[INFO] [stdout]  --> src/walk.rs:2:36
[INFO] [stdout]   |
[INFO] [stdout] 2 | use crate::node::{Node, NodeChild, NodeType};
[INFO] [stdout]   |                                    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::ops::Deref`
[INFO] [stdout]  --> src/stringifier.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::ops::Deref;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::walk::walk`
[INFO] [stdout]  --> src/stringifier.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use crate::walk::walk;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]   --> src/stringifier.rs:46:17
[INFO] [stdout]    |
[INFO] [stdout] 46 |                 ;
[INFO] [stdout]    |                 ^ help: remove this semicolon
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(redundant_semicolons)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]   --> src/stringifier.rs:61:17
[INFO] [stdout]    |
[INFO] [stdout] 61 |                 ;
[INFO] [stdout]    |                 ^ help: remove this semicolon
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `msg` is never read
[INFO] [stdout]    --> src/util.rs:133:23
[INFO] [stdout]     |
[INFO] [stdout] 133 |         let mut msg = String::new();
[INFO] [stdout]     |                       ^^^^^^^^^^^^^ this value is reassigned later and never used
[INFO] [stdout] ...
[INFO] [stdout] 138 |             msg = format!(
[INFO] [stdout]     |             --- `msg` is overwritten here before the previous value is read
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/walk.rs:18:26
[INFO] [stdout]    |
[INFO] [stdout] 18 |         NodeChild::Value(x) => {
[INFO] [stdout]    |                          ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/stringifier.rs:49:21
[INFO] [stdout]    |
[INFO] [stdout] 49 |                 let mut str = key_str;
[INFO] [stdout]    |                     ----^^^
[INFO] [stdout]    |                     |
[INFO] [stdout]    |                     help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `str`
[INFO] [stdout]   --> src/stringifier.rs:49:21
[INFO] [stdout]    |
[INFO] [stdout] 49 |                 let mut str = key_str;
[INFO] [stdout]    |                     ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_str`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/util.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout]  9 | impl Position {
[INFO] [stdout]    | ------------- associated function in this implementation
[INFO] [stdout] 10 |     pub fn new(line: usize, column: usize) -> Position {
[INFO] [stdout]    |            ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `input` is never read
[INFO] [stdout]  --> src/parser.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub struct Parser {
[INFO] [stdout]   |            ------ field in this struct
[INFO] [stdout] 6 |     pub input: String,
[INFO] [stdout]   |         ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/util.rs:146:16
[INFO] [stdout]     |
[INFO] [stdout] 146 |         panic!(msg);
[INFO] [stdout]     |                ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this usage of `panic!()` is deprecated; it will be a hard error in Rust 2021
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stdout]     = note: `#[warn(non_fmt_panics)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stdout] help: add a "{}" format string to `Display` the message
[INFO] [stdout]     |
[INFO] [stdout] 146 |         panic!("{}", msg);
[INFO] [stdout]     |                +++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/util.rs:163:16
[INFO] [stdout]     |
[INFO] [stdout] 163 |         panic!(msg);
[INFO] [stdout]     |                ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this usage of `panic!()` is deprecated; it will be a hard error in Rust 2021
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stdout] help: add a "{}" format string to `Display` the message
[INFO] [stdout]     |
[INFO] [stdout] 163 |         panic!("{}", msg);
[INFO] [stdout]     |                +++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/util.rs:179:16
[INFO] [stdout]     |
[INFO] [stdout] 179 |         panic!(msg);
[INFO] [stdout]     |                ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this usage of `panic!()` is deprecated; it will be a hard error in Rust 2021
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stdout] help: add a "{}" format string to `Display` the message
[INFO] [stdout]     |
[INFO] [stdout] 179 |         panic!("{}", msg);
[INFO] [stdout]     |                +++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.48s
[INFO] running `Command { std: "docker" "inspect" "78e1ac7843ba308d9ce2b0fa77cdda572be8f2ca060e24225f75537daf5d6c45", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "78e1ac7843ba308d9ce2b0fa77cdda572be8f2ca060e24225f75537daf5d6c45", kill_on_drop: false }`
[INFO] [stdout] 78e1ac7843ba308d9ce2b0fa77cdda572be8f2ca060e24225f75537daf5d6c45
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] ff7675f6be9c96f2f72a2af07fad65c300258223d8ef41814f9e129f49f6940f
[INFO] running `Command { std: "docker" "start" "-a" "ff7675f6be9c96f2f72a2af07fad65c300258223d8ef41814f9e129f49f6940f", kill_on_drop: false }`
[INFO] [stderr] warning: unused import: `std::fmt::Pointer`
[INFO] [stderr]  --> src/node.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::fmt::Pointer;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Display` and `Formatter`
[INFO] [stderr]  --> src/token.rs:1:16
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::fmt::{Display, Formatter};
[INFO] [stderr]   |                ^^^^^^^  ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `crate::util::*`
[INFO] [stderr]  --> src/parser.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use crate::util::*;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `NodeType`
[INFO] [stderr]  --> src/walk.rs:2:36
[INFO] [stderr]   |
[INFO] [stderr] 2 | use crate::node::{Node, NodeChild, NodeType};
[INFO] [stderr]   |                                    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::ops::Deref`
[INFO] [stderr]  --> src/stringifier.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::ops::Deref;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `crate::walk::walk`
[INFO] [stderr]  --> src/stringifier.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use crate::walk::walk;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary trailing semicolon
[INFO] [stderr]   --> src/stringifier.rs:46:17
[INFO] [stderr]    |
[INFO] [stderr] 46 |                 ;
[INFO] [stderr]    |                 ^ help: remove this semicolon
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(redundant_semicolons)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary trailing semicolon
[INFO] [stderr]   --> src/stringifier.rs:61:17
[INFO] [stderr]    |
[INFO] [stderr] 61 |                 ;
[INFO] [stderr]    |                 ^ help: remove this semicolon
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `msg` is never read
[INFO] [stderr]    --> src/util.rs:133:23
[INFO] [stderr]     |
[INFO] [stderr] 133 |         let mut msg = String::new();
[INFO] [stderr]     |                       ^^^^^^^^^^^^^ this value is reassigned later and never used
[INFO] [stderr] ...
[INFO] [stderr] 138 |             msg = format!(
[INFO] [stderr]     |             --- `msg` is overwritten here before the previous value is read
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]   --> src/walk.rs:18:26
[INFO] [stderr]    |
[INFO] [stderr] 18 |         NodeChild::Value(x) => {
[INFO] [stderr]    |                          ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/stringifier.rs:49:21
[INFO] [stderr]    |
[INFO] [stderr] 49 |                 let mut str = key_str;
[INFO] [stderr]    |                     ----^^^
[INFO] [stderr]    |                     |
[INFO] [stderr]    |                     help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `str`
[INFO] [stderr]   --> src/stringifier.rs:49:21
[INFO] [stderr]    |
[INFO] [stderr] 49 |                 let mut str = key_str;
[INFO] [stderr]    |                     ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_str`
[INFO] [stderr] 
[INFO] [stderr] warning: associated function `new` is never used
[INFO] [stderr]   --> src/util.rs:10:12
[INFO] [stderr]    |
[INFO] [stderr]  9 | impl Position {
[INFO] [stderr]    | ------------- associated function in this implementation
[INFO] [stderr] 10 |     pub fn new(line: usize, column: usize) -> Position {
[INFO] [stderr]    |            ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field `input` is never read
[INFO] [stderr]  --> src/parser.rs:6:9
[INFO] [stderr]   |
[INFO] [stderr] 5 | pub struct Parser {
[INFO] [stderr]   |            ------ field in this struct
[INFO] [stderr] 6 |     pub input: String,
[INFO] [stderr]   |         ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: panic message is not a string literal
[INFO] [stderr]    --> src/util.rs:146:16
[INFO] [stderr]     |
[INFO] [stderr] 146 |         panic!(msg);
[INFO] [stderr]     |                ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this usage of `panic!()` is deprecated; it will be a hard error in Rust 2021
[INFO] [stderr]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stderr]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stderr]     = note: `#[warn(non_fmt_panics)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stderr] help: add a "{}" format string to `Display` the message
[INFO] [stderr]     |
[INFO] [stderr] 146 |         panic!("{}", msg);
[INFO] [stderr]     |                +++++
[INFO] [stderr] 
[INFO] [stderr] warning: panic message is not a string literal
[INFO] [stderr]    --> src/util.rs:163:16
[INFO] [stderr]     |
[INFO] [stderr] 163 |         panic!(msg);
[INFO] [stderr]     |                ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this usage of `panic!()` is deprecated; it will be a hard error in Rust 2021
[INFO] [stderr]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stderr]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stderr] help: add a "{}" format string to `Display` the message
[INFO] [stderr]     |
[INFO] [stderr] 163 |         panic!("{}", msg);
[INFO] [stderr]     |                +++++
[INFO] [stderr] 
[INFO] [stderr] warning: panic message is not a string literal
[INFO] [stderr]    --> src/util.rs:179:16
[INFO] [stderr]     |
[INFO] [stderr] 179 |         panic!(msg);
[INFO] [stderr]     |                ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this usage of `panic!()` is deprecated; it will be a hard error in Rust 2021
[INFO] [stderr]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stderr]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stderr] help: add a "{}" format string to `Display` the message
[INFO] [stderr]     |
[INFO] [stderr] 179 |         panic!("{}", msg);
[INFO] [stderr]     |                +++++
[INFO] [stderr] 
[INFO] [stderr] warning: `tiny-json` (lib) generated 17 warnings (run `cargo fix --lib -p tiny-json` to apply 12 suggestions)
[INFO] [stderr] warning: `tiny-json` (lib test) generated 17 warnings (17 duplicates)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/tiny_json-ef6bfa0c8b8b7788)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests tiny_json
[INFO] [stderr] warning: unnecessary trailing semicolon
[INFO] [stderr]   --> src/stringifier.rs:46:17
[INFO] [stderr]    |
[INFO] [stderr] 46 |                 ;
[INFO] [stderr]    |                 ^ help: remove this semicolon
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(redundant_semicolons)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary trailing semicolon
[INFO] [stderr]   --> src/stringifier.rs:61:17
[INFO] [stderr]    |
[INFO] [stderr] 61 |                 ;
[INFO] [stderr]    |                 ^ help: remove this semicolon
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "ff7675f6be9c96f2f72a2af07fad65c300258223d8ef41814f9e129f49f6940f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ff7675f6be9c96f2f72a2af07fad65c300258223d8ef41814f9e129f49f6940f", kill_on_drop: false }`
[INFO] [stdout] ff7675f6be9c96f2f72a2af07fad65c300258223d8ef41814f9e129f49f6940f
