[INFO] cloning repository https://github.com/bash/cauliflambda
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/bash/cauliflambda" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbash%2Fcauliflambda", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbash%2Fcauliflambda'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 922e5413e9bf0b4f884c7464b74d2f4c755fc9b1
[INFO] testing bash/cauliflambda against master#2fd6efc32704647e64d3d646d21c4c68eae100e4 for pr-149852-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbash%2Fcauliflambda" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] removed /workspace/builds/worker-6-tc1/source/rust-toolchain.toml
[INFO] started tweaking git repo https://github.com/bash/cauliflambda
[INFO] finished tweaking git repo https://github.com/bash/cauliflambda
[INFO] tweaked toml for git repo https://github.com/bash/cauliflambda written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/bash/cauliflambda on toolchain 2fd6efc32704647e64d3d646d21c4c68eae100e4
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2fd6efc32704647e64d3d646d21c4c68eae100e4" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/bash/cauliflambda 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" "+2fd6efc32704647e64d3d646d21c4c68eae100e4" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating git repository `https://github.com/brendanzab/codespan`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded errno v0.3.7
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[INFO] [stderr]   Downloaded endian-type v0.1.2
[INFO] [stderr]   Downloaded fd-lock v3.0.13
[INFO] [stderr]   Downloaded winnow v0.4.11
[INFO] [stderr]   Downloaded rustyline v11.0.0
[INFO] [stderr]   Downloaded radix_trie v0.2.1
[INFO] [stderr]   Downloaded rustix v0.38.25
[INFO] [stderr]   Downloaded linux-raw-sys v0.4.11
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+2fd6efc32704647e64d3d646d21c4c68eae100e4" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 966341c675648f3259f03b1ebeedcc8a9db8f4e7a20cd58961c431517a37350f
[INFO] running `Command { std: "docker" "start" "-a" "966341c675648f3259f03b1ebeedcc8a9db8f4e7a20cd58961c431517a37350f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "966341c675648f3259f03b1ebeedcc8a9db8f4e7a20cd58961c431517a37350f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "966341c675648f3259f03b1ebeedcc8a9db8f4e7a20cd58961c431517a37350f", kill_on_drop: false }`
[INFO] [stdout] 966341c675648f3259f03b1ebeedcc8a9db8f4e7a20cd58961c431517a37350f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+2fd6efc32704647e64d3d646d21c4c68eae100e4" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] dab810819cd483f09a1582dbe6f8ea77b28bb0415e8c2adc4f172f10495b8cd7
[INFO] running `Command { std: "docker" "start" "-a" "dab810819cd483f09a1582dbe6f8ea77b28bb0415e8c2adc4f172f10495b8cd7", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.70
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling unicode-xid v0.2.4
[INFO] [stderr]    Compiling winnow v0.4.11
[INFO] [stderr]    Compiling fmtastic v0.1.0
[INFO] [stderr]    Compiling quote v1.0.33
[INFO] [stderr]    Compiling trait-set v0.3.0
[INFO] [stderr]    Compiling cauliflambda v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `expr`
[INFO] [stdout]   --> src/call_by_need.rs:99:14
[INFO] [stdout]    |
[INFO] [stdout] 99 | fn deref<'a>(expr: Expression<'a>) -> Option<Expression<'a>> {
[INFO] [stdout]    |              ^^^^ help: if this is intentional, prefix it with an underscore: `_expr`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `expr`
[INFO] [stdout]    --> src/call_by_need.rs:104:13
[INFO] [stdout]     |
[INFO] [stdout] 104 | fn lift<'a>(expr: Expression<'a>) -> Expression<'a> {
[INFO] [stdout]     |             ^^^^ help: if this is intentional, prefix it with an underscore: `_expr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `expr`
[INFO] [stdout]    --> src/call_by_need.rs:109:14
[INFO] [stdout]     |
[INFO] [stdout] 109 | fn assoc<'a>(expr: Expression<'a>) -> Expression<'a> {
[INFO] [stdout]     |              ^^^^ help: if this is intentional, prefix it with an underscore: `_expr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Expression` is never used
[INFO] [stdout]  --> src/call_by_need.rs:7:10
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub enum Expression<'a> {
[INFO] [stdout]   |          ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `value`, `answer`, and `evaluation_context` are never used
[INFO] [stdout]   --> src/call_by_need.rs:14:12
[INFO] [stdout]    |
[INFO] [stdout] 13 | impl<'a> Expression<'a> {
[INFO] [stdout]    | ----------------------- methods in this implementation
[INFO] [stdout] 14 |     pub fn value(&self) -> Option<Value<'a>> {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 22 |     pub fn answer(&self) -> Option<Answer<'a>> {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 41 |     fn evaluation_context(&self, hole: &Expression<'a>) -> Option<EvaluationContext<'a>> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Abstraction` is never constructed
[INFO] [stdout]   --> src/call_by_need.rs:74:12
[INFO] [stdout]    |
[INFO] [stdout] 74 | pub struct Abstraction<'a> {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Application` is never constructed
[INFO] [stdout]   --> src/call_by_need.rs:80:12
[INFO] [stdout]    |
[INFO] [stdout] 80 | pub struct Application<'a> {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Value` is never constructed
[INFO] [stdout]   --> src/call_by_need.rs:87:12
[INFO] [stdout]    |
[INFO] [stdout] 87 | pub struct Value<'a>(Abstraction<'a>);
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Answer` is never used
[INFO] [stdout]   --> src/call_by_need.rs:91:10
[INFO] [stdout]    |
[INFO] [stdout] 91 | pub enum Answer<'a> {
[INFO] [stdout]    |          ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `deref` is never used
[INFO] [stdout]   --> src/call_by_need.rs:99:4
[INFO] [stdout]    |
[INFO] [stdout] 99 | fn deref<'a>(expr: Expression<'a>) -> Option<Expression<'a>> {
[INFO] [stdout]    |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `lift` is never used
[INFO] [stdout]    --> src/call_by_need.rs:104:4
[INFO] [stdout]     |
[INFO] [stdout] 104 | fn lift<'a>(expr: Expression<'a>) -> Expression<'a> {
[INFO] [stdout]     |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `assoc` is never used
[INFO] [stdout]    --> src/call_by_need.rs:109:4
[INFO] [stdout]     |
[INFO] [stdout] 109 | fn assoc<'a>(expr: Expression<'a>) -> Expression<'a> {
[INFO] [stdout]     |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `EvaluationContext` is never used
[INFO] [stdout]    --> src/call_by_need.rs:118:6
[INFO] [stdout]     |
[INFO] [stdout] 118 | enum EvaluationContext<'a> {
[INFO] [stdout]     |      ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 5.53s
[INFO] running `Command { std: "docker" "inspect" "dab810819cd483f09a1582dbe6f8ea77b28bb0415e8c2adc4f172f10495b8cd7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dab810819cd483f09a1582dbe6f8ea77b28bb0415e8c2adc4f172f10495b8cd7", kill_on_drop: false }`
[INFO] [stdout] dab810819cd483f09a1582dbe6f8ea77b28bb0415e8c2adc4f172f10495b8cd7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+2fd6efc32704647e64d3d646d21c4c68eae100e4" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d58e8b96a7a6df0b9ca04910c5186f9c86eaf50c990e26afaea1a2197f21665d
[INFO] running `Command { std: "docker" "start" "-a" "d58e8b96a7a6df0b9ca04910c5186f9c86eaf50c990e26afaea1a2197f21665d", kill_on_drop: false }`
[INFO] [stdout] warning: unused variable: `expr`
[INFO] [stdout]   --> src/call_by_need.rs:99:14
[INFO] [stdout]    |
[INFO] [stdout] 99 | fn deref<'a>(expr: Expression<'a>) -> Option<Expression<'a>> {
[INFO] [stdout]    |              ^^^^ help: if this is intentional, prefix it with an underscore: `_expr`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `expr`
[INFO] [stdout]    --> src/call_by_need.rs:104:13
[INFO] [stdout]     |
[INFO] [stdout] 104 | fn lift<'a>(expr: Expression<'a>) -> Expression<'a> {
[INFO] [stdout]     |             ^^^^ help: if this is intentional, prefix it with an underscore: `_expr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `expr`
[INFO] [stdout]    --> src/call_by_need.rs:109:14
[INFO] [stdout]     |
[INFO] [stdout] 109 | fn assoc<'a>(expr: Expression<'a>) -> Expression<'a> {
[INFO] [stdout]     |              ^^^^ help: if this is intentional, prefix it with an underscore: `_expr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Expression` is never used
[INFO] [stdout]  --> src/call_by_need.rs:7:10
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub enum Expression<'a> {
[INFO] [stdout]   |          ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling cauliflambda v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: methods `value`, `answer`, and `evaluation_context` are never used
[INFO] [stdout]   --> src/call_by_need.rs:14:12
[INFO] [stdout]    |
[INFO] [stdout] 13 | impl<'a> Expression<'a> {
[INFO] [stdout]    | ----------------------- methods in this implementation
[INFO] [stdout] 14 |     pub fn value(&self) -> Option<Value<'a>> {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 22 |     pub fn answer(&self) -> Option<Answer<'a>> {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 41 |     fn evaluation_context(&self, hole: &Expression<'a>) -> Option<EvaluationContext<'a>> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Abstraction` is never constructed
[INFO] [stdout]   --> src/call_by_need.rs:74:12
[INFO] [stdout]    |
[INFO] [stdout] 74 | pub struct Abstraction<'a> {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Application` is never constructed
[INFO] [stdout]   --> src/call_by_need.rs:80:12
[INFO] [stdout]    |
[INFO] [stdout] 80 | pub struct Application<'a> {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Value` is never constructed
[INFO] [stdout]   --> src/call_by_need.rs:87:12
[INFO] [stdout]    |
[INFO] [stdout] 87 | pub struct Value<'a>(Abstraction<'a>);
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Answer` is never used
[INFO] [stdout]   --> src/call_by_need.rs:91:10
[INFO] [stdout]    |
[INFO] [stdout] 91 | pub enum Answer<'a> {
[INFO] [stdout]    |          ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `deref` is never used
[INFO] [stdout]   --> src/call_by_need.rs:99:4
[INFO] [stdout]    |
[INFO] [stdout] 99 | fn deref<'a>(expr: Expression<'a>) -> Option<Expression<'a>> {
[INFO] [stdout]    |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `lift` is never used
[INFO] [stdout]    --> src/call_by_need.rs:104:4
[INFO] [stdout]     |
[INFO] [stdout] 104 | fn lift<'a>(expr: Expression<'a>) -> Expression<'a> {
[INFO] [stdout]     |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `assoc` is never used
[INFO] [stdout]    --> src/call_by_need.rs:109:4
[INFO] [stdout]     |
[INFO] [stdout] 109 | fn assoc<'a>(expr: Expression<'a>) -> Expression<'a> {
[INFO] [stdout]     |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `EvaluationContext` is never used
[INFO] [stdout]    --> src/call_by_need.rs:118:6
[INFO] [stdout]     |
[INFO] [stdout] 118 | enum EvaluationContext<'a> {
[INFO] [stdout]     |      ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `expr`
[INFO] [stdout]   --> src/call_by_need.rs:99:14
[INFO] [stdout]    |
[INFO] [stdout] 99 | fn deref<'a>(expr: Expression<'a>) -> Option<Expression<'a>> {
[INFO] [stdout]    |              ^^^^ help: if this is intentional, prefix it with an underscore: `_expr`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `expr`
[INFO] [stdout]    --> src/call_by_need.rs:104:13
[INFO] [stdout]     |
[INFO] [stdout] 104 | fn lift<'a>(expr: Expression<'a>) -> Expression<'a> {
[INFO] [stdout]     |             ^^^^ help: if this is intentional, prefix it with an underscore: `_expr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `expr`
[INFO] [stdout]    --> src/call_by_need.rs:109:14
[INFO] [stdout]     |
[INFO] [stdout] 109 | fn assoc<'a>(expr: Expression<'a>) -> Expression<'a> {
[INFO] [stdout]     |              ^^^^ help: if this is intentional, prefix it with an underscore: `_expr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Expression` is never used
[INFO] [stdout]  --> src/call_by_need.rs:7:10
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub enum Expression<'a> {
[INFO] [stdout]   |          ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `value`, `answer`, and `evaluation_context` are never used
[INFO] [stdout]   --> src/call_by_need.rs:14:12
[INFO] [stdout]    |
[INFO] [stdout] 13 | impl<'a> Expression<'a> {
[INFO] [stdout]    | ----------------------- methods in this implementation
[INFO] [stdout] 14 |     pub fn value(&self) -> Option<Value<'a>> {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 22 |     pub fn answer(&self) -> Option<Answer<'a>> {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 41 |     fn evaluation_context(&self, hole: &Expression<'a>) -> Option<EvaluationContext<'a>> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Abstraction` is never constructed
[INFO] [stdout]   --> src/call_by_need.rs:74:12
[INFO] [stdout]    |
[INFO] [stdout] 74 | pub struct Abstraction<'a> {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Application` is never constructed
[INFO] [stdout]   --> src/call_by_need.rs:80:12
[INFO] [stdout]    |
[INFO] [stdout] 80 | pub struct Application<'a> {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Value` is never constructed
[INFO] [stdout]   --> src/call_by_need.rs:87:12
[INFO] [stdout]    |
[INFO] [stdout] 87 | pub struct Value<'a>(Abstraction<'a>);
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Answer` is never used
[INFO] [stdout]   --> src/call_by_need.rs:91:10
[INFO] [stdout]    |
[INFO] [stdout] 91 | pub enum Answer<'a> {
[INFO] [stdout]    |          ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `deref` is never used
[INFO] [stdout]   --> src/call_by_need.rs:99:4
[INFO] [stdout]    |
[INFO] [stdout] 99 | fn deref<'a>(expr: Expression<'a>) -> Option<Expression<'a>> {
[INFO] [stdout]    |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `lift` is never used
[INFO] [stdout]    --> src/call_by_need.rs:104:4
[INFO] [stdout]     |
[INFO] [stdout] 104 | fn lift<'a>(expr: Expression<'a>) -> Expression<'a> {
[INFO] [stdout]     |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `assoc` is never used
[INFO] [stdout]    --> src/call_by_need.rs:109:4
[INFO] [stdout]     |
[INFO] [stdout] 109 | fn assoc<'a>(expr: Expression<'a>) -> Expression<'a> {
[INFO] [stdout]     |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `EvaluationContext` is never used
[INFO] [stdout]    --> src/call_by_need.rs:118:6
[INFO] [stdout]     |
[INFO] [stdout] 118 | enum EvaluationContext<'a> {
[INFO] [stdout]     |      ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 1.32s
[INFO] running `Command { std: "docker" "inspect" "d58e8b96a7a6df0b9ca04910c5186f9c86eaf50c990e26afaea1a2197f21665d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d58e8b96a7a6df0b9ca04910c5186f9c86eaf50c990e26afaea1a2197f21665d", kill_on_drop: false }`
[INFO] [stdout] d58e8b96a7a6df0b9ca04910c5186f9c86eaf50c990e26afaea1a2197f21665d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+2fd6efc32704647e64d3d646d21c4c68eae100e4" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 622da82e449442dcb0d1b31109cc78f4793887d6a4f134e8f92100cffeeac0d5
[INFO] running `Command { std: "docker" "start" "-a" "622da82e449442dcb0d1b31109cc78f4793887d6a4f134e8f92100cffeeac0d5", kill_on_drop: false }`
[INFO] [stderr] warning: unused variable: `expr`
[INFO] [stderr]   --> src/call_by_need.rs:99:14
[INFO] [stderr]    |
[INFO] [stderr] 99 | fn deref<'a>(expr: Expression<'a>) -> Option<Expression<'a>> {
[INFO] [stderr]    |              ^^^^ help: if this is intentional, prefix it with an underscore: `_expr`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `expr`
[INFO] [stderr]    --> src/call_by_need.rs:104:13
[INFO] [stderr]     |
[INFO] [stderr] 104 | fn lift<'a>(expr: Expression<'a>) -> Expression<'a> {
[INFO] [stderr]     |             ^^^^ help: if this is intentional, prefix it with an underscore: `_expr`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `expr`
[INFO] [stderr]    --> src/call_by_need.rs:109:14
[INFO] [stderr]     |
[INFO] [stderr] 109 | fn assoc<'a>(expr: Expression<'a>) -> Expression<'a> {
[INFO] [stderr]     |              ^^^^ help: if this is intentional, prefix it with an underscore: `_expr`
[INFO] [stderr] 
[INFO] [stderr] warning: enum `Expression` is never used
[INFO] [stderr]  --> src/call_by_need.rs:7:10
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub enum Expression<'a> {
[INFO] [stderr]   |          ^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stdout] 
[INFO] [stderr] warning: methods `value`, `answer`, and `evaluation_context` are never used
[INFO] [stdout] running 36 tests
[INFO] [stderr]   --> src/call_by_need.rs:14:12
[INFO] [stderr]    |
[INFO] [stderr] 13 | impl<'a> Expression<'a> {
[INFO] [stderr]    | ----------------------- methods in this implementation
[INFO] [stderr] 14 |     pub fn value(&self) -> Option<Value<'a>> {
[INFO] [stderr]    |            ^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 22 |     pub fn answer(&self) -> Option<Answer<'a>> {
[INFO] [stderr]    |            ^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 41 |     fn evaluation_context(&self, hole: &Expression<'a>) -> Option<EvaluationContext<'a>> {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Abstraction` is never constructed
[INFO] [stderr]   --> src/call_by_need.rs:74:12
[INFO] [stderr]    |
[INFO] [stderr] 74 | pub struct Abstraction<'a> {
[INFO] [stderr]    |            ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Application` is never constructed
[INFO] [stderr]   --> src/call_by_need.rs:80:12
[INFO] [stderr]    |
[INFO] [stderr] 80 | pub struct Application<'a> {
[INFO] [stderr]    |            ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Value` is never constructed
[INFO] [stderr]   --> src/call_by_need.rs:87:12
[INFO] [stderr]    |
[INFO] [stderr] 87 | pub struct Value<'a>(Abstraction<'a>);
[INFO] [stderr]    |            ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum `Answer` is never used
[INFO] [stderr]   --> src/call_by_need.rs:91:10
[INFO] [stderr]    |
[INFO] [stderr] 91 | pub enum Answer<'a> {
[INFO] [stderr]    |          ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `deref` is never used
[INFO] [stderr]   --> src/call_by_need.rs:99:4
[INFO] [stderr]    |
[INFO] [stderr] 99 | fn deref<'a>(expr: Expression<'a>) -> Option<Expression<'a>> {
[INFO] [stderr]    |    ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `lift` is never used
[INFO] [stderr]    --> src/call_by_need.rs:104:4
[INFO] [stderr]     |
[INFO] [stderr] 104 | fn lift<'a>(expr: Expression<'a>) -> Expression<'a> {
[INFO] [stderr]     |    ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `assoc` is never used
[INFO] [stderr]    --> src/call_by_need.rs:109:4
[INFO] [stderr]     |
[INFO] [stderr] 109 | fn assoc<'a>(expr: Expression<'a>) -> Expression<'a> {
[INFO] [stderr]     |    ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum `EvaluationContext` is never used
[INFO] [stderr]    --> src/call_by_need.rs:118:6
[INFO] [stderr]     |
[INFO] [stderr] 118 | enum EvaluationContext<'a> {
[INFO] [stderr]     |      ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `cauliflambda` (lib) generated 13 warnings (run `cargo fix --lib -p cauliflambda` to apply 3 suggestions)
[INFO] [stderr] warning: `cauliflambda` (lib test) generated 13 warnings (13 duplicates)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.06s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/cauliflambda-926cc2121da876d3)
[INFO] [stdout] test evaluation::beta::tests::detects_expressions_that_cannot_be_reduced_futher ... ok
[INFO] [stdout] test evaluation::beta::tests::reduces_application_with_naming_conflict ... ok
[INFO] [stdout] test evaluation::free::tests::variable_by_itself_is_free ... ok
[INFO] [stdout] test evaluation::free::tests::variable_in_abstraction_is_bound ... ok
[INFO] [stdout] test evaluation::beta::tests::reduces_leftmost_outermost_application_first ... ok
[INFO] [stdout] test evaluation::beta::tests::reduces_outermost_application_first ... ok
[INFO] [stdout] test evaluation::free::tests::variable_in_abstraction_is_free_if_it_has_a_different_name ... ok
[INFO] [stdout] test evaluation::free::tests::variable_in_application_is_free_according_to_lhs_and_rhs ... ok
[INFO] [stdout] test evaluation::free::tests::variable_in_nested_abstraction_is_bound ... ok
[INFO] [stdout] test evaluation::rename::tests::does_not_rename_matching_bound_variables ... ok
[INFO] [stdout] test evaluation::rename::tests::does_not_rename_non_matching_variable ... ok
[INFO] [stdout] test evaluation::rename::tests::renames_matching_free_variables ... ok
[INFO] [stdout] test evaluation::rename::tests::renames_matching_variable ... ok
[INFO] [stdout] test evaluation::rename::tests::renames_matching_variables_in_application ... ok
[INFO] [stdout] test evaluation::rename_bound::tests::ignores_free_variables_that_do_not_satisfy_predicate ... ok
[INFO] [stdout] test evaluation::rename_bound::tests::ignores_bound_variables_that_satisfy_predicate ... ok
[INFO] [stdout] test evaluation::beta::tests::reduces_leftmost_application_first ... ok
[INFO] [stdout] test evaluation::substitute::tests::does_not_substitutes_non_matching_free_variable ... ok
[INFO] [stdout] test evaluation::substitute::tests::does_not_substitute_matching_bound_variable ... ok
[INFO] [stdout] test evaluation::substitute::tests::substitutes_matching_free_variable ... ok
[INFO] [stdout] test evaluation::rename_bound::tests::skips_free_variables_in_abstraction_term_when_renaming ... ok
[INFO] [stdout] test evaluation::rename_bound::tests::renames_bound_variables ... ok
[INFO] [stdout] test evaluation::tests::only_adds_necessary_parenthesis ... ok
[INFO] [stdout] test parsers::tests::does_not_parse_invalid_identifers ... ok
[INFO] [stdout] test parsers::tests::application_is_left_associative ... ok
[INFO] [stdout] test evaluation::free::tests::variable_on_right_side_of_application_is_not_bound ... ok
[INFO] [stdout] test evaluation::substitute::tests::substitutes_matching_free_variable_in_abstraction ... ok
[INFO] [stdout] test evaluation::substitute::tests::substitutes_matching_free_variable_in_application ... ok
[INFO] [stdout] test parsers::tests::parses_abstraction ... ok
[INFO] [stdout] test parsers::tests::parses_abstraction_with_more_than_one_variable ... ok
[INFO] [stdout] test parsers::tests::parses_application ... ok
[INFO] [stdout] test parsers::tests::parses_identifiers ... ok
[INFO] [stdout] test parsers::tests::parses_parenthesized_formulas ... ok
[INFO] [stdout] test parsers::tests::trivia_can_be_placed_anywhere_in_formula ... ok
[INFO] [stdout] test parsers::tests::errors_are_reported_at_correct_location ... ok
[INFO] [stdout] test evaluation::rename_bound::tests::panics_when_all_disambiguators_are_used_up - should panic ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 36 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.03s
[INFO] [stdout] 
[INFO] [stderr]      Running tests/integration_tests.rs (/opt/rustwide/target/debug/deps/integration_tests-c59c7e0db69f7a37)
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test three_is_not_even ... ok
[INFO] [stdout] test factorial_of_four_can_be_computed ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 3.08s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests cauliflambda
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test src/call_by_need.rs - call_by_need::EvaluationContext (line 114) ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- src/call_by_need.rs - call_by_need::EvaluationContext (line 114) stdout ----
[INFO] [stdout] error: expected identifier, found `=`
[INFO] [stdout]    --> src/call_by_need.rs:115:5
[INFO] [stdout]     |
[INFO] [stdout] 115 | E ::= [ ] | EM | (λx.E[x])E | (λx.E)M
[INFO] [stdout]     |     ^ expected identifier
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     src/call_by_need.rs - call_by_need::EvaluationContext (line 114)
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 0 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.07s
[INFO] [stdout] 
[INFO] [stderr] error: doctest failed, to rerun pass `--doc`
[INFO] running `Command { std: "docker" "inspect" "622da82e449442dcb0d1b31109cc78f4793887d6a4f134e8f92100cffeeac0d5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "622da82e449442dcb0d1b31109cc78f4793887d6a4f134e8f92100cffeeac0d5", kill_on_drop: false }`
[INFO] [stdout] 622da82e449442dcb0d1b31109cc78f4793887d6a4f134e8f92100cffeeac0d5
