[INFO] cloning repository https://github.com/rshepherd549/little_schemer
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/rshepherd549/little_schemer" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frshepherd549%2Flittle_schemer", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frshepherd549%2Flittle_schemer'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3ea962ee7dd9d1cd571440f81ca1af47ca9a6fe7
[INFO] checking rshepherd549/little_schemer against master#9d28fe39763974a96d61232e96ac856735e4cdd6 for pr-139624
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frshepherd549%2Flittle_schemer" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/rshepherd549/little_schemer on toolchain 9d28fe39763974a96d61232e96ac856735e4cdd6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+9d28fe39763974a96d61232e96ac856735e4cdd6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/rshepherd549/little_schemer
[INFO] finished tweaking git repo https://github.com/rshepherd549/little_schemer
[INFO] tweaked toml for git repo https://github.com/rshepherd549/little_schemer written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+9d28fe39763974a96d61232e96ac856735e4cdd6" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 10 packages to latest compatible versions
[INFO] [stderr]       Adding test-case v2.2.2 (available: v3.3.1)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+9d28fe39763974a96d61232e96ac856735e4cdd6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+9d28fe39763974a96d61232e96ac856735e4cdd6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 51a6b33cc6e7c55c3a07dd14ae8272a4903554e7ebe37be078196fdcade4ce7d
[INFO] running `Command { std: "docker" "start" "-a" "51a6b33cc6e7c55c3a07dd14ae8272a4903554e7ebe37be078196fdcade4ce7d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "51a6b33cc6e7c55c3a07dd14ae8272a4903554e7ebe37be078196fdcade4ce7d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "51a6b33cc6e7c55c3a07dd14ae8272a4903554e7ebe37be078196fdcade4ce7d", kill_on_drop: false }`
[INFO] [stdout] 51a6b33cc6e7c55c3a07dd14ae8272a4903554e7ebe37be078196fdcade4ce7d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+9d28fe39763974a96d61232e96ac856735e4cdd6" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 128a9c6129c642620e21055e31304d136b64410b0ae1c7a74d6ffbddd7621342
[INFO] running `Command { std: "docker" "start" "-a" "128a9c6129c642620e21055e31304d136b64410b0ae1c7a74d6ffbddd7621342", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.94
[INFO] [stderr]    Compiling version_check v0.9.5
[INFO] [stderr]    Compiling unicode-ident v1.0.18
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling quote v1.0.40
[INFO] [stderr]    Compiling test-case-macros v2.2.2
[INFO] [stderr]     Checking test-case v2.2.2
[INFO] [stderr]     Checking little_schemer v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around match arm expression
[INFO] [stdout]    --> src/main.rs:351:47
[INFO] [stdout]     |
[INFO] [stdout] 351 |                     SExpression::Atom(rhs) => (lhs == rhs),
[INFO] [stdout]     |                                               ^          ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 351 -                     SExpression::Atom(rhs) => (lhs == rhs),
[INFO] [stdout] 351 +                     SExpression::Atom(rhs) => lhs == rhs,
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around match arm expression
[INFO] [stdout]    --> src/main.rs:375:37
[INFO] [stdout]     |
[INFO] [stdout] 375 |             SExpression::Atom(s) => (s == "true"),
[INFO] [stdout]     |                                     ^           ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 375 -             SExpression::Atom(s) => (s == "true"),
[INFO] [stdout] 375 +             SExpression::Atom(s) => s == "true",
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around match arm expression
[INFO] [stdout]    --> src/main.rs:124:46
[INFO] [stdout]     |
[INFO] [stdout] 124 |             Some(SExpression::List(list)) => (list.len() == 0),
[INFO] [stdout]     |                                              ^               ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 124 -             Some(SExpression::List(list)) => (list.len() == 0),
[INFO] [stdout] 124 +             Some(SExpression::List(list)) => list.len() == 0,
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around match arm expression
[INFO] [stdout]    --> src/main.rs:155:53
[INFO] [stdout]     |
[INFO] [stdout] 155 | ...                   SExpression::Atom(s) => (s == "atom"),
[INFO] [stdout]     |                                               ^           ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 155 -                             SExpression::Atom(s) => (s == "atom"),
[INFO] [stdout] 155 +                             SExpression::Atom(s) => s == "atom",
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around match arm expression
[INFO] [stdout]    --> src/main.rs:159:53
[INFO] [stdout]     |
[INFO] [stdout] 159 | ...                   SExpression::Atom(s) => (s == "turkey"),
[INFO] [stdout]     |                                               ^             ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 159 -                             SExpression::Atom(s) => (s == "turkey"),
[INFO] [stdout] 159 +                             SExpression::Atom(s) => s == "turkey",
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around match arm expression
[INFO] [stdout]    --> src/main.rs:163:53
[INFO] [stdout]     |
[INFO] [stdout] 163 | ...                   SExpression::Atom(s) => (s == "third"),
[INFO] [stdout]     |                                               ^            ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 163 -                             SExpression::Atom(s) => (s == "third"),
[INFO] [stdout] 163 +                             SExpression::Atom(s) => s == "third",
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around match arm expression
[INFO] [stdout]    --> src/main.rs:170:45
[INFO] [stdout]     |
[INFO] [stdout] 170 |                     SExpression::Atom(s) => (s == "or"),
[INFO] [stdout]     |                                             ^         ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 170 -                     SExpression::Atom(s) => (s == "or"),
[INFO] [stdout] 170 +                     SExpression::Atom(s) => s == "or",
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around match arm expression
[INFO] [stdout]    --> src/main.rs:182:46
[INFO] [stdout]     |
[INFO] [stdout] 182 |             Some(SExpression::List(list)) => (list.len() == 6),
[INFO] [stdout]     |                                              ^               ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 182 -             Some(SExpression::List(list)) => (list.len() == 6),
[INFO] [stdout] 182 +             Some(SExpression::List(list)) => list.len() == 6,
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around match arm expression
[INFO] [stdout]    --> src/main.rs:202:46
[INFO] [stdout]     |
[INFO] [stdout] 202 |             Some(SExpression::List(list)) => (list.len() == 3),
[INFO] [stdout]     |                                              ^               ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 202 -             Some(SExpression::List(list)) => (list.len() == 3),
[INFO] [stdout] 202 +             Some(SExpression::List(list)) => list.len() == 3,
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around match arm expression
[INFO] [stdout]    --> src/main.rs:351:47
[INFO] [stdout]     |
[INFO] [stdout] 351 |                     SExpression::Atom(rhs) => (lhs == rhs),
[INFO] [stdout]     |                                               ^          ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 351 -                     SExpression::Atom(rhs) => (lhs == rhs),
[INFO] [stdout] 351 +                     SExpression::Atom(rhs) => lhs == rhs,
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around match arm expression
[INFO] [stdout]    --> src/main.rs:375:37
[INFO] [stdout]     |
[INFO] [stdout] 375 |             SExpression::Atom(s) => (s == "true"),
[INFO] [stdout]     |                                     ^           ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 375 -             SExpression::Atom(s) => (s == "true"),
[INFO] [stdout] 375 +             SExpression::Atom(s) => s == "true",
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Token` is never used
[INFO] [stdout]  --> src/main.rs:5:6
[INFO] [stdout]   |
[INFO] [stdout] 5 | enum Token {
[INFO] [stdout]   |      ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `to_tokens` is never used
[INFO] [stdout]   --> src/main.rs:11:4
[INFO] [stdout]    |
[INFO] [stdout] 11 | fn to_tokens(text: &str) -> Vec<Token> {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `SExpression` is never used
[INFO] [stdout]   --> src/main.rs:64:6
[INFO] [stdout]    |
[INFO] [stdout] 64 | enum SExpression {
[INFO] [stdout]    |      ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `to_sexpression` is never used
[INFO] [stdout]   --> src/main.rs:69:4
[INFO] [stdout]    |
[INFO] [stdout] 69 | fn to_sexpression(tokens: &[Token]) -> Option<SExpression> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `is_atom` is never used
[INFO] [stdout]    --> src/main.rs:208:4
[INFO] [stdout]     |
[INFO] [stdout] 208 | fn is_atom(tokens: &Vec<Token>) -> bool {
[INFO] [stdout]     |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_is_atom` is never used
[INFO] [stdout]    --> src/main.rs:231:4
[INFO] [stdout]     |
[INFO] [stdout] 231 | fn test_is_atom(s: &str, expected: bool) {
[INFO] [stdout]     |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `is_list` is never used
[INFO] [stdout]    --> src/main.rs:236:4
[INFO] [stdout]     |
[INFO] [stdout] 236 | fn is_list(tokens: &Vec<Token>) -> bool {
[INFO] [stdout]     |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_is_list` is never used
[INFO] [stdout]    --> src/main.rs:276:4
[INFO] [stdout]     |
[INFO] [stdout] 276 | fn test_is_list(s: &str, expected: bool) {
[INFO] [stdout]     |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `is_s_exp` is never used
[INFO] [stdout]    --> src/main.rs:281:4
[INFO] [stdout]     |
[INFO] [stdout] 281 | fn is_s_exp(tokens: &Vec<Token>) -> bool {
[INFO] [stdout]     |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `Environment` is never used
[INFO] [stdout]    --> src/main.rs:296:6
[INFO] [stdout]     |
[INFO] [stdout] 296 | type Environment = HashMap<String, SExpression>;
[INFO] [stdout]     |      ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple methods are never used
[INFO] [stdout]    --> src/main.rs:299:8
[INFO] [stdout]     |
[INFO] [stdout] 298 | impl SExpression {
[INFO] [stdout]     | ---------------- methods in this implementation
[INFO] [stdout] 299 |     fn car(&self) -> Option<SExpression> {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 306 |     fn cdr(&self) -> Option<SExpression> {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 313 |     fn cons(&self, list: &SExpression) -> Option<SExpression> {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 324 |     fn is_null(&self) -> SExpression {
[INFO] [stdout]     |        ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 332 |     fn quote(&self) -> Option<SExpression> {
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 336 |     fn is_atom_(&self) -> bool {
[INFO] [stdout]     |        ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 343 |     fn is_atom(&self) -> SExpression {
[INFO] [stdout]     |        ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 347 |     fn is_eq(&self, other: &SExpression) -> SExpression {
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 366 |     fn is_lat(&self) -> SExpression {
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 373 |     fn is_true(&self) -> bool {
[INFO] [stdout]     |        ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 380 |     fn cond(&self, conditions: &mut std::slice::Iter<SExpression>, env: &mut Environment) -> Option<SExpression> {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 396 |     fn define(&self, other: &SExpression, env: &mut Environment) {
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 403 |     fn eval(&self, env: &mut Environment) -> Option<SExpression> {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `sexpression_to_string` is never used
[INFO] [stdout]    --> src/main.rs:522:4
[INFO] [stdout]     |
[INFO] [stdout] 522 | fn sexpression_to_string(sexp: &SExpression, env: &mut Environment) -> String {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `eval_scheme_to_string` is never used
[INFO] [stdout]    --> src/main.rs:550:4
[INFO] [stdout]     |
[INFO] [stdout] 550 | fn eval_scheme_to_string(s: &str) -> String {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_eval_scheme_to_string` is never used
[INFO] [stdout]    --> src/main.rs:624:4
[INFO] [stdout]     |
[INFO] [stdout] 624 | fn test_eval_scheme_to_string(s: &str, expected: &str) {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 7.84s
[INFO] running `Command { std: "docker" "inspect" "128a9c6129c642620e21055e31304d136b64410b0ae1c7a74d6ffbddd7621342", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "128a9c6129c642620e21055e31304d136b64410b0ae1c7a74d6ffbddd7621342", kill_on_drop: false }`
[INFO] [stdout] 128a9c6129c642620e21055e31304d136b64410b0ae1c7a74d6ffbddd7621342