[INFO] cloning repository https://github.com/friendly-potato/friendly-potato-lang
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/friendly-potato/friendly-potato-lang" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffriendly-potato%2Ffriendly-potato-lang", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffriendly-potato%2Ffriendly-potato-lang'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 49ba9a89c400124b53b7f7052e82313192c63b53
[INFO] checking friendly-potato/friendly-potato-lang against master#dfd7b8d03fb93d0e03147d28b3be6d93260fa94d for pr-87050
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffriendly-potato%2Ffriendly-potato-lang" "/workspace/builds/worker-13/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-13/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/friendly-potato/friendly-potato-lang on toolchain dfd7b8d03fb93d0e03147d28b3be6d93260fa94d
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/friendly-potato/friendly-potato-lang
[INFO] finished tweaking git repo https://github.com/friendly-potato/friendly-potato-lang
[INFO] tweaked toml for git repo https://github.com/friendly-potato/friendly-potato-lang written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] crate git repo https://github.com/friendly-potato/friendly-potato-lang already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] d0e3a3485629cdb2e84e6a50b64f70b3fbc43ad0e23f3895f5364b4bd63b552b
[INFO] running `Command { std: "docker" "start" "-a" "d0e3a3485629cdb2e84e6a50b64f70b3fbc43ad0e23f3895f5364b4bd63b552b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d0e3a3485629cdb2e84e6a50b64f70b3fbc43ad0e23f3895f5364b4bd63b552b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d0e3a3485629cdb2e84e6a50b64f70b3fbc43ad0e23f3895f5364b4bd63b552b", kill_on_drop: false }`
[INFO] [stdout] d0e3a3485629cdb2e84e6a50b64f70b3fbc43ad0e23f3895f5364b4bd63b552b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9eafc86244eb9e9a3fff37d2059bc4519bd3845ad1fec2c81430959cacc8a650
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "9eafc86244eb9e9a3fff37d2059bc4519bd3845ad1fec2c81430959cacc8a650", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.95
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking friendly-potato-lang v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::any::Any`
[INFO] [stdout]  --> src/evaluator.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::any::Any;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::*`
[INFO] [stdout]    --> src/parser.rs:148:9
[INFO] [stdout]     |
[INFO] [stdout] 148 |     use super::*;
[INFO] [stdout]     |         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `App`, `Arg`, `SubCommand`
[INFO] [stdout]  --> src/main.rs:8:12
[INFO] [stdout]   |
[INFO] [stdout] 8 | use clap::{App, Arg, SubCommand};
[INFO] [stdout]   |            ^^^  ^^^  ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::any::Any`
[INFO] [stdout]  --> src/evaluator.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::any::Any;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `App`, `Arg`, `SubCommand`
[INFO] [stdout]  --> src/main.rs:8:12
[INFO] [stdout]   |
[INFO] [stdout] 8 | use clap::{App, Arg, SubCommand};
[INFO] [stdout]   |            ^^^  ^^^  ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `eval_value`
[INFO] [stdout]   --> src/main.rs:50:9
[INFO] [stdout]    |
[INFO] [stdout] 50 |     let eval_value = evaluator.evaluate(&parser_value);
[INFO] [stdout]    |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_eval_value`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v`
[INFO] [stdout]   --> src/evaluator.rs:65:34
[INFO] [stdout]    |
[INFO] [stdout] 65 |                 AtomType::String(v) => {}
[INFO] [stdout]    |                                  ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v`
[INFO] [stdout]   --> src/evaluator.rs:66:34
[INFO] [stdout]    |
[INFO] [stdout] 66 |                 AtomType::Number(v) => {}
[INFO] [stdout]    |                                  ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v`
[INFO] [stdout]   --> src/evaluator.rs:67:34
[INFO] [stdout]    |
[INFO] [stdout] 67 |                 AtomType::Symbol(v) => {}
[INFO] [stdout]    |                                  ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]   --> src/evaluator.rs:69:34
[INFO] [stdout]    |
[INFO] [stdout] 69 |             ExpressionType::List(n) => {}
[INFO] [stdout]    |                                  ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum is never used: `Env`
[INFO] [stdout]  --> src/evaluator.rs:6:10
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub enum Env {
[INFO] [stdout]   |          ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Environment`
[INFO] [stdout]   --> src/evaluator.rs:11:12
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub struct Environment {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/evaluator.rs:17:12
[INFO] [stdout]    |
[INFO] [stdout] 17 |     pub fn new(inner: Env, outer: Env) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `create_base_environment`
[INFO] [stdout]   --> src/evaluator.rs:23:12
[INFO] [stdout]    |
[INFO] [stdout] 23 |     pub fn create_base_environment() -> Self {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `ast_traceback`
[INFO] [stdout]   --> src/evaluator.rs:32:5
[INFO] [stdout]    |
[INFO] [stdout] 32 |     ast_traceback: Vec<u128>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `exp_index`
[INFO] [stdout]   --> src/evaluator.rs:33:5
[INFO] [stdout]    |
[INFO] [stdout] 33 |     exp_index: u128,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `call_stack`
[INFO] [stdout]   --> src/evaluator.rs:49:5
[INFO] [stdout]    |
[INFO] [stdout] 49 |     call_stack: CallStack,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Expression`
[INFO] [stdout]   --> src/tokenizer.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 |     Expression,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `EscapeCharacter`
[INFO] [stdout]   --> src/tokenizer.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 |     EscapeCharacter,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 17 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `eval_value`
[INFO] [stdout]   --> src/main.rs:50:9
[INFO] [stdout]    |
[INFO] [stdout] 50 |     let eval_value = evaluator.evaluate(&parser_value);
[INFO] [stdout]    |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_eval_value`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v`
[INFO] [stdout]   --> src/evaluator.rs:65:34
[INFO] [stdout]    |
[INFO] [stdout] 65 |                 AtomType::String(v) => {}
[INFO] [stdout]    |                                  ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v`
[INFO] [stdout]   --> src/evaluator.rs:66:34
[INFO] [stdout]    |
[INFO] [stdout] 66 |                 AtomType::Number(v) => {}
[INFO] [stdout]    |                                  ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v`
[INFO] [stdout]   --> src/evaluator.rs:67:34
[INFO] [stdout]    |
[INFO] [stdout] 67 |                 AtomType::Symbol(v) => {}
[INFO] [stdout]    |                                  ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]   --> src/evaluator.rs:69:34
[INFO] [stdout]    |
[INFO] [stdout] 69 |             ExpressionType::List(n) => {}
[INFO] [stdout]    |                                  ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum is never used: `Env`
[INFO] [stdout]  --> src/evaluator.rs:6:10
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub enum Env {
[INFO] [stdout]   |          ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Environment`
[INFO] [stdout]   --> src/evaluator.rs:11:12
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub struct Environment {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/evaluator.rs:17:12
[INFO] [stdout]    |
[INFO] [stdout] 17 |     pub fn new(inner: Env, outer: Env) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `create_base_environment`
[INFO] [stdout]   --> src/evaluator.rs:23:12
[INFO] [stdout]    |
[INFO] [stdout] 23 |     pub fn create_base_environment() -> Self {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `ast_traceback`
[INFO] [stdout]   --> src/evaluator.rs:32:5
[INFO] [stdout]    |
[INFO] [stdout] 32 |     ast_traceback: Vec<u128>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `exp_index`
[INFO] [stdout]   --> src/evaluator.rs:33:5
[INFO] [stdout]    |
[INFO] [stdout] 33 |     exp_index: u128,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `call_stack`
[INFO] [stdout]   --> src/evaluator.rs:49:5
[INFO] [stdout]    |
[INFO] [stdout] 49 |     call_stack: CallStack,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Expression`
[INFO] [stdout]   --> src/tokenizer.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 |     Expression,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `EscapeCharacter`
[INFO] [stdout]   --> src/tokenizer.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 |     EscapeCharacter,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 16 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 7.09s
[INFO] running `Command { std: "docker" "inspect" "9eafc86244eb9e9a3fff37d2059bc4519bd3845ad1fec2c81430959cacc8a650", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9eafc86244eb9e9a3fff37d2059bc4519bd3845ad1fec2c81430959cacc8a650", kill_on_drop: false }`
[INFO] [stdout] 9eafc86244eb9e9a3fff37d2059bc4519bd3845ad1fec2c81430959cacc8a650