[INFO] cloning repository https://github.com/pandemonium/sylt
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/pandemonium/sylt" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpandemonium%2Fsylt", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpandemonium%2Fsylt'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 90d39897c2bb9811c62735c630874a56876af318
[INFO] testing pandemonium/sylt against master#ebf0cf75d368c035f4c7e7246d203bd469ee4a51 for pr-137940-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpandemonium%2Fsylt" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/pandemonium/sylt on toolchain ebf0cf75d368c035f4c7e7246d203bd469ee4a51
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ebf0cf75d368c035f4c7e7246d203bd469ee4a51" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/pandemonium/sylt
[INFO] finished tweaking git repo https://github.com/pandemonium/sylt
[INFO] tweaked toml for git repo https://github.com/pandemonium/sylt written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/pandemonium/sylt 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" "+ebf0cf75d368c035f4c7e7246d203bd469ee4a51" "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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:1680c8fbd8dfb46fcd6d22e546df16ab0e007457dc29fcd9e987cdd5077fd1af" "/opt/rustwide/cargo-home/bin/cargo" "+ebf0cf75d368c035f4c7e7246d203bd469ee4a51" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 052551c5bf1476c1f961c7934e5b19fae1540dd5ab279e03bea1f970d9c9b0fb
[INFO] running `Command { std: "docker" "start" "-a" "052551c5bf1476c1f961c7934e5b19fae1540dd5ab279e03bea1f970d9c9b0fb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "052551c5bf1476c1f961c7934e5b19fae1540dd5ab279e03bea1f970d9c9b0fb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "052551c5bf1476c1f961c7934e5b19fae1540dd5ab279e03bea1f970d9c9b0fb", kill_on_drop: false }`
[INFO] [stdout] 052551c5bf1476c1f961c7934e5b19fae1540dd5ab279e03bea1f970d9c9b0fb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:1680c8fbd8dfb46fcd6d22e546df16ab0e007457dc29fcd9e987cdd5077fd1af" "/opt/rustwide/cargo-home/bin/cargo" "+ebf0cf75d368c035f4c7e7246d203bd469ee4a51" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a464b351a4dde47cd05a26feea5b73dd1984197455516fa3b67c48fa6a5c543b
[INFO] running `Command { std: "docker" "start" "-a" "a464b351a4dde47cd05a26feea5b73dd1984197455516fa3b67c48fa6a5c543b", kill_on_drop: false }`
[INFO] [stderr]    Compiling sylt v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `element`
[INFO] [stdout]    --> src/runtime/ast/interpreter.rs:170:66
[INFO] [stdout]     |
[INFO] [stdout] 170 |             ast::Expression::PutArrayElement { array, subscript, element } => {
[INFO] [stdout]     |                                                                  ^^^^^^^ help: try ignoring the field: `element: _`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `array`
[INFO] [stdout]    --> src/runtime/ast/interpreter.rs:277:21
[INFO] [stdout]     |
[INFO] [stdout] 277 |                     array,
[INFO] [stdout]     |                     ^^^^^ help: try ignoring the field: `array: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `subscript`
[INFO] [stdout]    --> src/runtime/ast/interpreter.rs:278:21
[INFO] [stdout]     |
[INFO] [stdout] 278 |                     subscript,
[INFO] [stdout]     |                     ^^^^^^^^^ help: try ignoring the field: `subscript: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rhs`
[INFO] [stdout]    --> src/runtime/ast/interpreter.rs:279:21
[INFO] [stdout]     |
[INFO] [stdout] 279 |                     rhs,
[INFO] [stdout]     |                     ^^^ help: try ignoring the field: `rhs: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `array`
[INFO] [stdout]    --> src/runtime/bytecode/compiler.rs:156:43
[INFO] [stdout]     |
[INFO] [stdout] 156 |             ast::Statement::ArrayUpdate { array, subscript, rhs } => {
[INFO] [stdout]     |                                           ^^^^^ help: try ignoring the field: `array: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `subscript`
[INFO] [stdout]    --> src/runtime/bytecode/compiler.rs:156:50
[INFO] [stdout]     |
[INFO] [stdout] 156 |             ast::Statement::ArrayUpdate { array, subscript, rhs } => {
[INFO] [stdout]     |                                                  ^^^^^^^^^ help: try ignoring the field: `subscript: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rhs`
[INFO] [stdout]    --> src/runtime/bytecode/compiler.rs:156:61
[INFO] [stdout]     |
[INFO] [stdout] 156 |             ast::Statement::ArrayUpdate { array, subscript, rhs } => {
[INFO] [stdout]     |                                                             ^^^ help: try ignoring the field: `rhs: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `types_unify` and `put_array_element` are never used
[INFO] [stdout]    --> src/runtime/ast/interpreter.rs:87:8
[INFO] [stdout]     |
[INFO] [stdout] 51  | impl<'a> ActivationFrame<'a> {
[INFO] [stdout]     | ---------------------------- associated items in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 87  |     fn types_unify(lhs: &ast::Type, rhs: &ast::Type) -> bool {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 223 |     fn put_array_element(
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `array_get_element` is never used
[INFO] [stdout]    --> src/syntax.rs:230:4
[INFO] [stdout]     |
[INFO] [stdout] 230 | fn array_get_element() -> impl Parser<In = lex::Token, Out = ast::Expression> {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `self` and `vm`
[INFO] [stdout]  --> src/main.rs:5:20
[INFO] [stdout]   |
[INFO] [stdout] 5 |         bytecode::{self, vm},
[INFO] [stdout]   |                    ^^^^  ^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `source`
[INFO] [stdout]   --> src/main.rs:11:9
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let source = r#"
[INFO] [stdout]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_source`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 10.56s
[INFO] running `Command { std: "docker" "inspect" "a464b351a4dde47cd05a26feea5b73dd1984197455516fa3b67c48fa6a5c543b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a464b351a4dde47cd05a26feea5b73dd1984197455516fa3b67c48fa6a5c543b", kill_on_drop: false }`
[INFO] [stdout] a464b351a4dde47cd05a26feea5b73dd1984197455516fa3b67c48fa6a5c543b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:1680c8fbd8dfb46fcd6d22e546df16ab0e007457dc29fcd9e987cdd5077fd1af" "/opt/rustwide/cargo-home/bin/cargo" "+ebf0cf75d368c035f4c7e7246d203bd469ee4a51" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 18a60779c383198832701b40ca7d5e2ff58eeb7373259d9af322cfe70a2d9e84
[INFO] running `Command { std: "docker" "start" "-a" "18a60779c383198832701b40ca7d5e2ff58eeb7373259d9af322cfe70a2d9e84", kill_on_drop: false }`
[INFO] [stdout] warning: unused variable: `element`
[INFO] [stdout]    --> src/runtime/ast/interpreter.rs:170:66
[INFO] [stdout]     |
[INFO] [stdout] 170 |             ast::Expression::PutArrayElement { array, subscript, element } => {
[INFO] [stdout]     |                                                                  ^^^^^^^ help: try ignoring the field: `element: _`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `array`
[INFO] [stdout]    --> src/runtime/ast/interpreter.rs:277:21
[INFO] [stdout]     |
[INFO] [stdout] 277 |                     array,
[INFO] [stdout]     |                     ^^^^^ help: try ignoring the field: `array: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `subscript`
[INFO] [stdout]    --> src/runtime/ast/interpreter.rs:278:21
[INFO] [stdout]     |
[INFO] [stdout] 278 |                     subscript,
[INFO] [stdout]     |                     ^^^^^^^^^ help: try ignoring the field: `subscript: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rhs`
[INFO] [stdout]    --> src/runtime/ast/interpreter.rs:279:21
[INFO] [stdout]     |
[INFO] [stdout] 279 |                     rhs,
[INFO] [stdout]     |                     ^^^ help: try ignoring the field: `rhs: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `array`
[INFO] [stdout]    --> src/runtime/bytecode/compiler.rs:156:43
[INFO] [stdout]     |
[INFO] [stdout] 156 |             ast::Statement::ArrayUpdate { array, subscript, rhs } => {
[INFO] [stdout]     |                                           ^^^^^ help: try ignoring the field: `array: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `subscript`
[INFO] [stdout]    --> src/runtime/bytecode/compiler.rs:156:50
[INFO] [stdout]     |
[INFO] [stdout] 156 |             ast::Statement::ArrayUpdate { array, subscript, rhs } => {
[INFO] [stdout]     |                                                  ^^^^^^^^^ help: try ignoring the field: `subscript: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rhs`
[INFO] [stdout]    --> src/runtime/bytecode/compiler.rs:156:61
[INFO] [stdout]     |
[INFO] [stdout] 156 |             ast::Statement::ArrayUpdate { array, subscript, rhs } => {
[INFO] [stdout]     |                                                             ^^^ help: try ignoring the field: `rhs: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling sylt v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated items `types_unify` and `put_array_element` are never used
[INFO] [stdout]    --> src/runtime/ast/interpreter.rs:87:8
[INFO] [stdout]     |
[INFO] [stdout] 51  | impl<'a> ActivationFrame<'a> {
[INFO] [stdout]     | ---------------------------- associated items in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 87  |     fn types_unify(lhs: &ast::Type, rhs: &ast::Type) -> bool {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 223 |     fn put_array_element(
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `array_get_element` is never used
[INFO] [stdout]    --> src/syntax.rs:230:4
[INFO] [stdout]     |
[INFO] [stdout] 230 | fn array_get_element() -> impl Parser<In = lex::Token, Out = ast::Expression> {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `self` and `vm`
[INFO] [stdout]  --> src/main.rs:5:20
[INFO] [stdout]   |
[INFO] [stdout] 5 |         bytecode::{self, vm},
[INFO] [stdout]   |                    ^^^^  ^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `source`
[INFO] [stdout]   --> src/main.rs:11:9
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let source = r#"
[INFO] [stdout]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_source`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Scalar`, `Compound`, and `Null` are never constructed
[INFO] [stdout]  --> examples/json.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | enum Value {
[INFO] [stdout]   |      ----- variants in this enum
[INFO] [stdout] 5 |     Scalar(ScalarValue),
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout] 6 |     Compound(CompoundValue),
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout] 7 |     Null,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Value` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `parse` is never used
[INFO] [stdout]   --> examples/json.rs:11:12
[INFO] [stdout]    |
[INFO] [stdout] 10 | impl Value {
[INFO] [stdout]    | ---------- associated function in this implementation
[INFO] [stdout] 11 |     pub fn parse(json_text: &str) -> Option<Self> {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Number`, `Text`, and `Boolean` are never constructed
[INFO] [stdout]   --> examples/json.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 19 | enum ScalarValue {
[INFO] [stdout]    |      ----------- variants in this enum
[INFO] [stdout] 20 |     Number(f64),
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 21 |     Text(String),
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 22 |     Boolean(bool),
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `ScalarValue` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Array` and `Object` are never constructed
[INFO] [stdout]   --> examples/json.rs:27:5
[INFO] [stdout]    |
[INFO] [stdout] 26 | enum CompoundValue {
[INFO] [stdout]    |      ------------- variants in this enum
[INFO] [stdout] 27 |     Array(Vec<Value>),
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 28 |     Object(Vec<(String, Value)>),
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `CompoundValue` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `ws` is never used
[INFO] [stdout]   --> examples/json.rs:31:4
[INFO] [stdout]    |
[INFO] [stdout] 31 | fn ws() -> impl Parser<Out = (), In = char> {
[INFO] [stdout]    |    ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `null` is never used
[INFO] [stdout]   --> examples/json.rs:37:4
[INFO] [stdout]    |
[INFO] [stdout] 37 | fn null() -> impl Parser<Out = Value, In = char> {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `digit` is never used
[INFO] [stdout]   --> examples/json.rs:41:4
[INFO] [stdout]    |
[INFO] [stdout] 41 | fn digit() -> impl Parser<In = char, Out = char> {
[INFO] [stdout]    |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `number` is never used
[INFO] [stdout]   --> examples/json.rs:45:4
[INFO] [stdout]    |
[INFO] [stdout] 45 | fn number() -> impl Parser<Out = ScalarValue, In = char> {
[INFO] [stdout]    |    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `text` is never used
[INFO] [stdout]   --> examples/json.rs:57:4
[INFO] [stdout]    |
[INFO] [stdout] 57 | fn text() -> impl Parser<Out = String, In = char> {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `boolean` is never used
[INFO] [stdout]   --> examples/json.rs:68:4
[INFO] [stdout]    |
[INFO] [stdout] 68 | fn boolean() -> impl Parser<Out = ScalarValue, In = char> {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `scalar` is never used
[INFO] [stdout]   --> examples/json.rs:77:4
[INFO] [stdout]    |
[INFO] [stdout] 77 | fn scalar() -> impl Parser<Out = Value, In = char> {
[INFO] [stdout]    |    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `array` is never used
[INFO] [stdout]   --> examples/json.rs:84:4
[INFO] [stdout]    |
[INFO] [stdout] 84 | fn array() -> impl Parser<Out = CompoundValue, In = char> {
[INFO] [stdout]    |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `object` is never used
[INFO] [stdout]   --> examples/json.rs:93:4
[INFO] [stdout]    |
[INFO] [stdout] 93 | fn object() -> impl Parser<Out = CompoundValue, In = char> {
[INFO] [stdout]    |    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `compound` is never used
[INFO] [stdout]    --> examples/json.rs:106:4
[INFO] [stdout]     |
[INFO] [stdout] 106 | fn compound() -> impl Parser<Out = Value, In = char> {
[INFO] [stdout]     |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `value` is never used
[INFO] [stdout]    --> examples/json.rs:110:4
[INFO] [stdout]     |
[INFO] [stdout] 110 | fn value() -> ParsimoniousValue {
[INFO] [stdout]     |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ParsimoniousValue` is never constructed
[INFO] [stdout]    --> examples/json.rs:115:8
[INFO] [stdout]     |
[INFO] [stdout] 115 | struct ParsimoniousValue;
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `element`
[INFO] [stdout]    --> src/runtime/ast/interpreter.rs:170:66
[INFO] [stdout]     |
[INFO] [stdout] 170 |             ast::Expression::PutArrayElement { array, subscript, element } => {
[INFO] [stdout]     |                                                                  ^^^^^^^ help: try ignoring the field: `element: _`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `array`
[INFO] [stdout]    --> src/runtime/ast/interpreter.rs:277:21
[INFO] [stdout]     |
[INFO] [stdout] 277 |                     array,
[INFO] [stdout]     |                     ^^^^^ help: try ignoring the field: `array: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `subscript`
[INFO] [stdout]    --> src/runtime/ast/interpreter.rs:278:21
[INFO] [stdout]     |
[INFO] [stdout] 278 |                     subscript,
[INFO] [stdout]     |                     ^^^^^^^^^ help: try ignoring the field: `subscript: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rhs`
[INFO] [stdout]    --> src/runtime/ast/interpreter.rs:279:21
[INFO] [stdout]     |
[INFO] [stdout] 279 |                     rhs,
[INFO] [stdout]     |                     ^^^ help: try ignoring the field: `rhs: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `array`
[INFO] [stdout]    --> src/runtime/bytecode/compiler.rs:156:43
[INFO] [stdout]     |
[INFO] [stdout] 156 |             ast::Statement::ArrayUpdate { array, subscript, rhs } => {
[INFO] [stdout]     |                                           ^^^^^ help: try ignoring the field: `array: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `subscript`
[INFO] [stdout]    --> src/runtime/bytecode/compiler.rs:156:50
[INFO] [stdout]     |
[INFO] [stdout] 156 |             ast::Statement::ArrayUpdate { array, subscript, rhs } => {
[INFO] [stdout]     |                                                  ^^^^^^^^^ help: try ignoring the field: `subscript: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rhs`
[INFO] [stdout]    --> src/runtime/bytecode/compiler.rs:156:61
[INFO] [stdout]     |
[INFO] [stdout] 156 |             ast::Statement::ArrayUpdate { array, subscript, rhs } => {
[INFO] [stdout]     |                                                             ^^^ help: try ignoring the field: `rhs: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `types_unify` and `put_array_element` are never used
[INFO] [stdout]    --> src/runtime/ast/interpreter.rs:87:8
[INFO] [stdout]     |
[INFO] [stdout] 51  | impl<'a> ActivationFrame<'a> {
[INFO] [stdout]     | ---------------------------- associated items in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 87  |     fn types_unify(lhs: &ast::Type, rhs: &ast::Type) -> bool {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 223 |     fn put_array_element(
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `array_get_element` is never used
[INFO] [stdout]    --> src/syntax.rs:230:4
[INFO] [stdout]     |
[INFO] [stdout] 230 | fn array_get_element() -> impl Parser<In = lex::Token, Out = ast::Expression> {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 11.41s
[INFO] running `Command { std: "docker" "inspect" "18a60779c383198832701b40ca7d5e2ff58eeb7373259d9af322cfe70a2d9e84", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "18a60779c383198832701b40ca7d5e2ff58eeb7373259d9af322cfe70a2d9e84", kill_on_drop: false }`
[INFO] [stdout] 18a60779c383198832701b40ca7d5e2ff58eeb7373259d9af322cfe70a2d9e84
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:1680c8fbd8dfb46fcd6d22e546df16ab0e007457dc29fcd9e987cdd5077fd1af" "/opt/rustwide/cargo-home/bin/cargo" "+ebf0cf75d368c035f4c7e7246d203bd469ee4a51" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] adeededf17eadef6a6936700e015ccde4f6b20051ba3b3c2b3ab7e3ad7a920be
[INFO] running `Command { std: "docker" "start" "-a" "adeededf17eadef6a6936700e015ccde4f6b20051ba3b3c2b3ab7e3ad7a920be", kill_on_drop: false }`
[INFO] [stderr] warning: unused variable: `element`
[INFO] [stderr]    --> src/runtime/ast/interpreter.rs:170:66
[INFO] [stderr]     |
[INFO] [stderr] 170 |             ast::Expression::PutArrayElement { array, subscript, element } => {
[INFO] [stderr]     |                                                                  ^^^^^^^ help: try ignoring the field: `element: _`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `array`
[INFO] [stderr]    --> src/runtime/ast/interpreter.rs:277:21
[INFO] [stderr]     |
[INFO] [stderr] 277 |                     array,
[INFO] [stderr]     |                     ^^^^^ help: try ignoring the field: `array: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `subscript`
[INFO] [stderr]    --> src/runtime/ast/interpreter.rs:278:21
[INFO] [stderr]     |
[INFO] [stderr] 278 |                     subscript,
[INFO] [stderr]     |                     ^^^^^^^^^ help: try ignoring the field: `subscript: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `rhs`
[INFO] [stderr]    --> src/runtime/ast/interpreter.rs:279:21
[INFO] [stderr]     |
[INFO] [stderr] 279 |                     rhs,
[INFO] [stderr]     |                     ^^^ help: try ignoring the field: `rhs: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `array`
[INFO] [stderr]    --> src/runtime/bytecode/compiler.rs:156:43
[INFO] [stderr]     |
[INFO] [stderr] 156 |             ast::Statement::ArrayUpdate { array, subscript, rhs } => {
[INFO] [stderr]     |                                           ^^^^^ help: try ignoring the field: `array: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `subscript`
[INFO] [stderr]    --> src/runtime/bytecode/compiler.rs:156:50
[INFO] [stderr]     |
[INFO] [stderr] 156 |             ast::Statement::ArrayUpdate { array, subscript, rhs } => {
[INFO] [stderr]     |                                                  ^^^^^^^^^ help: try ignoring the field: `subscript: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `rhs`
[INFO] [stderr]    --> src/runtime/bytecode/compiler.rs:156:61
[INFO] [stderr]     |
[INFO] [stderr] 156 |             ast::Statement::ArrayUpdate { array, subscript, rhs } => {
[INFO] [stderr]     |                                                             ^^^ help: try ignoring the field: `rhs: _`
[INFO] [stderr] 
[INFO] [stderr] warning: associated items `types_unify` and `put_array_element` are never used
[INFO] [stderr]    --> src/runtime/ast/interpreter.rs:87:8
[INFO] [stderr]     |
[INFO] [stderr] 51  | impl<'a> ActivationFrame<'a> {
[INFO] [stderr]     | ---------------------------- associated items in this implementation
[INFO] [stderr] ...
[INFO] [stderr] 87  |     fn types_unify(lhs: &ast::Type, rhs: &ast::Type) -> bool {
[INFO] [stderr]     |        ^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 223 |     fn put_array_element(
[INFO] [stderr]     |        ^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function `array_get_element` is never used
[INFO] [stderr]    --> src/syntax.rs:230:4
[INFO] [stderr]     |
[INFO] [stderr] 230 | fn array_get_element() -> impl Parser<In = lex::Token, Out = ast::Expression> {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `sylt` (lib) generated 9 warnings
[INFO] [stderr] warning: unused imports: `self` and `vm`
[INFO] [stderr]  --> src/main.rs:5:20
[INFO] [stderr]   |
[INFO] [stderr] 5 |         bytecode::{self, vm},
[INFO] [stderr]   |                    ^^^^  ^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `source`
[INFO] [stderr]   --> src/main.rs:11:9
[INFO] [stderr]    |
[INFO] [stderr] 11 |     let source = r#"
[INFO] [stderr]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_source`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `sylt` (bin "sylt" test) generated 2 warnings (run `cargo fix --bin "sylt" --tests` to apply 1 suggestion)
[INFO] [stderr] warning: variants `Scalar`, `Compound`, and `Null` are never constructed
[INFO] [stderr]  --> examples/json.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | enum Value {
[INFO] [stderr]   |      ----- variants in this enum
[INFO] [stderr] 5 |     Scalar(ScalarValue),
[INFO] [stderr]   |     ^^^^^^
[INFO] [stderr] 6 |     Compound(CompoundValue),
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr] 7 |     Null,
[INFO] [stderr]   |     ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `Value` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function `parse` is never used
[INFO] [stderr]   --> examples/json.rs:11:12
[INFO] [stderr]    |
[INFO] [stderr] 10 | impl Value {
[INFO] [stderr]    | ---------- associated function in this implementation
[INFO] [stderr] 11 |     pub fn parse(json_text: &str) -> Option<Self> {
[INFO] [stderr]    |            ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variants `Number`, `Text`, and `Boolean` are never constructed
[INFO] [stderr]   --> examples/json.rs:20:5
[INFO] [stderr]    |
[INFO] [stderr] 19 | enum ScalarValue {
[INFO] [stderr]    |      ----------- variants in this enum
[INFO] [stderr] 20 |     Number(f64),
[INFO] [stderr]    |     ^^^^^^
[INFO] [stderr] 21 |     Text(String),
[INFO] [stderr]    |     ^^^^
[INFO] [stderr] 22 |     Boolean(bool),
[INFO] [stderr]    |     ^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `ScalarValue` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: variants `Array` and `Object` are never constructed
[INFO] [stderr]   --> examples/json.rs:27:5
[INFO] [stderr]    |
[INFO] [stderr] 26 | enum CompoundValue {
[INFO] [stderr]    |      ------------- variants in this enum
[INFO] [stderr] 27 |     Array(Vec<Value>),
[INFO] [stderr]    |     ^^^^^
[INFO] [stderr] 28 |     Object(Vec<(String, Value)>),
[INFO] [stderr]    |     ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `CompoundValue` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: function `ws` is never used
[INFO] [stderr]   --> examples/json.rs:31:4
[INFO] [stderr]    |
[INFO] [stderr] 31 | fn ws() -> impl Parser<Out = (), In = char> {
[INFO] [stderr]    |    ^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `null` is never used
[INFO] [stderr]   --> examples/json.rs:37:4
[INFO] [stderr]    |
[INFO] [stderr] 37 | fn null() -> impl Parser<Out = Value, In = char> {
[INFO] [stderr]    |    ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `digit` is never used
[INFO] [stderr]   --> examples/json.rs:41:4
[INFO] [stderr]    |
[INFO] [stderr] 41 | fn digit() -> impl Parser<In = char, Out = char> {
[INFO] [stderr]    |    ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `number` is never used
[INFO] [stderr]   --> examples/json.rs:45:4
[INFO] [stderr]    |
[INFO] [stderr] 45 | fn number() -> impl Parser<Out = ScalarValue, In = char> {
[INFO] [stderr]    |    ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `text` is never used
[INFO] [stderr]   --> examples/json.rs:57:4
[INFO] [stderr]    |
[INFO] [stderr] 57 | fn text() -> impl Parser<Out = String, In = char> {
[INFO] [stderr]    |    ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `boolean` is never used
[INFO] [stderr]   --> examples/json.rs:68:4
[INFO] [stderr]    |
[INFO] [stderr] 68 | fn boolean() -> impl Parser<Out = ScalarValue, In = char> {
[INFO] [stderr]    |    ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `scalar` is never used
[INFO] [stderr]   --> examples/json.rs:77:4
[INFO] [stderr]    |
[INFO] [stderr] 77 | fn scalar() -> impl Parser<Out = Value, In = char> {
[INFO] [stderr]    |    ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `array` is never used
[INFO] [stderr]   --> examples/json.rs:84:4
[INFO] [stderr]    |
[INFO] [stderr] 84 | fn array() -> impl Parser<Out = CompoundValue, In = char> {
[INFO] [stderr]    |    ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `object` is never used
[INFO] [stderr]   --> examples/json.rs:93:4
[INFO] [stderr]    |
[INFO] [stderr] 93 | fn object() -> impl Parser<Out = CompoundValue, In = char> {
[INFO] [stderr]    |    ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `compound` is never used
[INFO] [stderr]    --> examples/json.rs:106:4
[INFO] [stderr]     |
[INFO] [stderr] 106 | fn compound() -> impl Parser<Out = Value, In = char> {
[INFO] [stderr]     |    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `value` is never used
[INFO] [stderr]    --> examples/json.rs:110:4
[INFO] [stderr]     |
[INFO] [stderr] 110 | fn value() -> ParsimoniousValue {
[INFO] [stderr]     |    ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `ParsimoniousValue` is never constructed
[INFO] [stderr]    --> examples/json.rs:115:8
[INFO] [stderr]     |
[INFO] [stderr] 115 | struct ParsimoniousValue;
[INFO] [stderr]     |        ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `sylt` (example "json") generated 16 warnings
[INFO] [stderr] warning: `sylt` (lib test) generated 9 warnings (9 duplicates)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/sylt-81a145a080e9092a)
[INFO] [stdout] 
[INFO] [stdout] running 32 tests
[INFO] [stdout] test ast::tests::parse_hello_world_program ... ok
[INFO] [stdout] test kombi::tests::enclosed_within_test ... ok
[INFO] [stdout] test kombi::tests::strings ... ok
[INFO] [stdout] test kombi::tests::maps ... ok
[INFO] [stdout] test kombi::tests::one_ofs ... ok
[INFO] [stdout] test kombi::tests::or_else ... ok
[INFO] [stdout] test kombi::tests::such_thats ... ok
[INFO] [stdout] test kombi::tests::whens ... ok
[INFO] [stdout] test kombi::tests::zero_or_more ... ok
[INFO] [stdout] test kombi::tests::positions ... ok
[INFO] [stdout] test lexer::tests::apply ... ok
[INFO] [stdout] test lexer::tests::array_get ... ok
[INFO] [stdout] test lexer::tests::array_declaration ... ok
[INFO] [stdout] test kombi::tests::flat_maps ... ok
[INFO] [stdout] test lexer::tests::spaces ... ok
[INFO] [stdout] test lexer::tests::compound_separators ... ok
[INFO] [stdout] test lexer::tests::tokenör ... ok
[INFO] [stdout] test lexer::tests::let_statement ... ok
[INFO] [stdout] test lexer::tests::while_block ... ok
[INFO] [stdout] test lexer::tests::infix_expressions ... ok
[INFO] [stdout] test kombi::tests::takes ... ok
[INFO] [stdout] test syntax::tests::apply ... ok
[INFO] [stdout] test ast::tests::show_hello_world_program ... ok
[INFO] [stdout] test syntax::tests::return_statement ... ok
[INFO] [stdout] test syntax::tests::if_statement ... ok
[INFO] [stdout] test syntax::tests::let_statement ... ok
[INFO] [stdout] test kombi::tests::and_also ... ok
[INFO] [stdout] test syntax::tests::while_statement ... ok
[INFO] [stdout] test syntax::tests::function_declaration ... ok
[INFO] [stdout] test runtime::ast::interpreter::tests::operator_precedence ... ok
[INFO] [stdout] test syntax::tests::infix_expressions ... ok
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/sylt-3aaeb7ac522c7734)
[INFO] [stdout] test runtime::ast::interpreter::tests::fibonacci ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 32 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.37s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests sylt
[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] [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" "adeededf17eadef6a6936700e015ccde4f6b20051ba3b3c2b3ab7e3ad7a920be", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "adeededf17eadef6a6936700e015ccde4f6b20051ba3b3c2b3ab7e3ad7a920be", kill_on_drop: false }`
[INFO] [stdout] adeededf17eadef6a6936700e015ccde4f6b20051ba3b3c2b3ab7e3ad7a920be