[INFO] cloning repository https://github.com/alpaylan/mutant-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/alpaylan/mutant-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falpaylan%2Fmutant-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falpaylan%2Fmutant-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e443de224078756547deee3526f0e8d019fc9d1a
[INFO] checking alpaylan/mutant-rs against try#c9557a20e5ef2e0e02c29a5fafd850d1b7cf1e4f for 2025-12-16-next-solver-global
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falpaylan%2Fmutant-rs" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/alpaylan/mutant-rs
[INFO] finished tweaking git repo https://github.com/alpaylan/mutant-rs
[INFO] tweaked toml for git repo https://github.com/alpaylan/mutant-rs written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/alpaylan/mutant-rs on toolchain c9557a20e5ef2e0e02c29a5fafd850d1b7cf1e4f
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[INFO] crate git repo https://github.com/alpaylan/mutant-rs 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" "+c9557a20e5ef2e0e02c29a5fafd850d1b7cf1e4f" "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 env_logger v0.11.6
[INFO] [stderr]   Downloaded thiserror-impl v2.0.9
[INFO] [stderr]   Downloaded insta v1.41.1
[INFO] [stderr]   Downloaded thiserror v2.0.9
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[INFO] [stdout] bdb31ba124c556fb93d33246761032acd5b6a48665969fea234167a0b47e3319
[INFO] running `Command { std: "docker" "start" "-a" "bdb31ba124c556fb93d33246761032acd5b6a48665969fea234167a0b47e3319", kill_on_drop: false }`
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[INFO] [stdout] bdb31ba124c556fb93d33246761032acd5b6a48665969fea234167a0b47e3319
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+c9557a20e5ef2e0e02c29a5fafd850d1b7cf1e4f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d923c669826176e70fe9908feaa36eb0631245a215e6568b81ee703c9a6aa584
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[INFO] [stderr]    Compiling proc-macro2 v1.0.92
[INFO] [stderr]    Compiling thiserror v2.0.9
[INFO] [stderr]     Checking regex-syntax v0.8.5
[INFO] [stderr]    Compiling serde v1.0.217
[INFO] [stderr]    Compiling libc v0.2.169
[INFO] [stderr]     Checking aho-corasick v1.1.3
[INFO] [stderr]     Checking hashbrown v0.15.2
[INFO] [stderr]     Checking bstr v1.11.3
[INFO] [stderr]    Compiling anyhow v1.0.95
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[INFO] [stderr]     Checking indexmap v2.7.0
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[INFO] [stderr]     Checking regex-automata v0.4.9
[INFO] [stderr]    Compiling syn v2.0.90
[INFO] [stderr]     Checking insta v1.41.1
[INFO] [stderr]     Checking regex v1.11.1
[INFO] [stderr]     Checking globset v0.4.15
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[INFO] [stderr]     Checking env_logger v0.11.6
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[INFO] [stderr]    Compiling serde_derive v1.0.217
[INFO] [stderr]    Compiling clap_derive v4.5.18
[INFO] [stderr]    Compiling pest v2.7.15
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[INFO] [stderr]    Compiling pest_meta v2.7.15
[INFO] [stderr]    Compiling pest_generator v2.7.15
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[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/code.rs:97:26
[INFO] [stdout]    |
[INFO] [stdout] 97 |                     for (i, variant) in v.variants.iter().enumerate() {
[INFO] [stdout]    |                          ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `indentation`
[INFO] [stdout]   --> src/code.rs:98:29
[INFO] [stdout]    |
[INFO] [stdout] 98 |                         let indentation = variant.indentation().unwrap_or(v.indentation.clone());
[INFO] [stdout]    |                             ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_indentation`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `found` is assigned to, but never used
[INFO] [stdout]    --> src/commands.rs:104:9
[INFO] [stdout]     |
[INFO] [stdout] 104 |     let mut found = false;
[INFO] [stdout]     |         ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: consider using `_found` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `found` is never read
[INFO] [stdout]    --> src/commands.rs:118:13
[INFO] [stdout]     |
[INFO] [stdout] 118 |             found = true;
[INFO] [stdout]     |             ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/code.rs:97:26
[INFO] [stdout]    |
[INFO] [stdout] 97 |                     for (i, variant) in v.variants.iter().enumerate() {
[INFO] [stdout]    |                          ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `indentation`
[INFO] [stdout]   --> src/code.rs:98:29
[INFO] [stdout]    |
[INFO] [stdout] 98 |                         let indentation = variant.indentation().unwrap_or(v.indentation.clone());
[INFO] [stdout]    |                             ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_indentation`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `found` is assigned to, but never used
[INFO] [stdout]    --> src/commands.rs:104:9
[INFO] [stdout]     |
[INFO] [stdout] 104 |     let mut found = false;
[INFO] [stdout]     |         ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: consider using `_found` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `found` is never read
[INFO] [stdout]    --> src/commands.rs:118:13
[INFO] [stdout]     |
[INFO] [stdout] 118 |             found = true;
[INFO] [stdout]     |             ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `detect_language` is never used
[INFO] [stdout]    --> src/code.rs:182:19
[INFO] [stdout]     |
[INFO] [stdout] 131 | impl Code {
[INFO] [stdout]     | --------- associated function in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 182 |     pub(crate) fn detect_language(filepath: &str) -> Language {
[INFO] [stdout]     |                   ^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `longest_common_prefix` is never used
[INFO] [stdout]    --> src/code.rs:205:8
[INFO] [stdout]     |
[INFO] [stdout] 204 | impl Code {
[INFO] [stdout]     | --------- associated function in this implementation
[INFO] [stdout] 205 |     fn longest_common_prefix(strs: &[String]) -> String {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `AST` is never used
[INFO] [stdout]   --> src/syntax/functional.rs:10:6
[INFO] [stdout]    |
[INFO] [stdout] 10 | enum AST {
[INFO] [stdout]    |      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Builtin` is never used
[INFO] [stdout]   --> src/syntax/functional.rs:33:6
[INFO] [stdout]    |
[INFO] [stdout] 33 | enum Builtin {
[INFO] [stdout]    |      ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Value` is never used
[INFO] [stdout]   --> src/syntax/functional.rs:44:6
[INFO] [stdout]    |
[INFO] [stdout] 44 | enum Value {
[INFO] [stdout]    |      ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `LispParser` is never constructed
[INFO] [stdout]   --> src/syntax/functional.rs:54:8
[INFO] [stdout]    |
[INFO] [stdout] 54 | struct LispParser;
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `parse` is never used
[INFO] [stdout]   --> src/syntax/functional.rs:56:4
[INFO] [stdout]    |
[INFO] [stdout] 56 | fn parse(input: &str) -> Result<AST, Box<pest::error::Error<Rule>>> {
[INFO] [stdout]    |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `parse_expression` is never used
[INFO] [stdout]   --> src/syntax/functional.rs:76:4
[INFO] [stdout]    |
[INFO] [stdout] 76 | fn parse_expression(pair: pest::iterators::Pair<Rule>) -> AST {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `parse_string` is never used
[INFO] [stdout]    --> src/syntax/functional.rs:168:4
[INFO] [stdout]     |
[INFO] [stdout] 168 | fn parse_string(pair: pest::iterators::Pair<Rule>) -> String {
[INFO] [stdout]     |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `eval` is never used
[INFO] [stdout]    --> src/syntax/functional.rs:178:4
[INFO] [stdout]     |
[INFO] [stdout] 178 | fn eval(ast: AST, ctx: &mut HashMap<String, Value>) -> anyhow::Result<Value> {
[INFO] [stdout]     |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `eval_builtin` is never used
[INFO] [stdout]    --> src/syntax/functional.rs:283:4
[INFO] [stdout]     |
[INFO] [stdout] 283 | fn eval_builtin(builtin: Builtin, args: Vec<Value>) -> anyhow::Result<Value> {
[INFO] [stdout]     |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `detect_language` is never used
[INFO] [stdout]    --> src/code.rs:182:19
[INFO] [stdout]     |
[INFO] [stdout] 131 | impl Code {
[INFO] [stdout]     | --------- associated function in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 182 |     pub(crate) fn detect_language(filepath: &str) -> Language {
[INFO] [stdout]     |                   ^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `longest_common_prefix` is never used
[INFO] [stdout]    --> src/code.rs:205:8
[INFO] [stdout]     |
[INFO] [stdout] 204 | impl Code {
[INFO] [stdout]     | --------- associated function in this implementation
[INFO] [stdout] 205 |     fn longest_common_prefix(strs: &[String]) -> String {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `And`, `Or`, and `Not` are never constructed
[INFO] [stdout]   --> src/syntax/functional.rs:37:5
[INFO] [stdout]    |
[INFO] [stdout] 33 | enum Builtin {
[INFO] [stdout]    |      ------- variants in this enum
[INFO] [stdout] ...
[INFO] [stdout] 37 |     And,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 38 |     Or,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 39 |     Not,
[INFO] [stdout]    |     ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Builtin` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 12.27s
[INFO] running `Command { std: "docker" "inspect" "d923c669826176e70fe9908feaa36eb0631245a215e6568b81ee703c9a6aa584", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d923c669826176e70fe9908feaa36eb0631245a215e6568b81ee703c9a6aa584", kill_on_drop: false }`
[INFO] [stdout] d923c669826176e70fe9908feaa36eb0631245a215e6568b81ee703c9a6aa584