[INFO] cloning repository https://github.com/l3kn/EulerLisp
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/l3kn/EulerLisp" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fl3kn%2FEulerLisp", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fl3kn%2FEulerLisp'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c525a71b2059b06dc1341fcd479daa8f77bdd972
[INFO] building l3kn/EulerLisp against master#881c1ac408d93bb7adaa3a51dabab9266e82eee8 for issue-85264
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fl3kn%2FEulerLisp" "/workspace/builds/worker-8/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/l3kn/EulerLisp on toolchain 881c1ac408d93bb7adaa3a51dabab9266e82eee8
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+881c1ac408d93bb7adaa3a51dabab9266e82eee8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/l3kn/EulerLisp
[INFO] finished tweaking git repo https://github.com/l3kn/EulerLisp
[INFO] tweaked toml for git repo https://github.com/l3kn/EulerLisp written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/l3kn/EulerLisp already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+881c1ac408d93bb7adaa3a51dabab9266e82eee8" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded colored v1.6.0
[INFO] [stderr]   Downloaded csv-core v0.1.4
[INFO] [stderr]   Downloaded serde v1.0.33
[INFO] [stderr]   Downloaded num-bigint v0.2.2
[INFO] [stderr]   Downloaded num v0.2.0
[INFO] [stderr]   Downloaded csv v1.0.0-beta.5
[INFO] [stderr]   Downloaded syn v0.15.25
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+881c1ac408d93bb7adaa3a51dabab9266e82eee8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d5b2c079ef6643dd268c8d7aaa605d8b992c7b5752bd9afea07300c8a584864b
[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" "d5b2c079ef6643dd268c8d7aaa605d8b992c7b5752bd9afea07300c8a584864b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d5b2c079ef6643dd268c8d7aaa605d8b992c7b5752bd9afea07300c8a584864b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d5b2c079ef6643dd268c8d7aaa605d8b992c7b5752bd9afea07300c8a584864b", kill_on_drop: false }`
[INFO] [stdout] d5b2c079ef6643dd268c8d7aaa605d8b992c7b5752bd9afea07300c8a584864b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+881c1ac408d93bb7adaa3a51dabab9266e82eee8" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bc21f300c28d7fb9597cea5d8fbcb55ab0020d785b618fa05342a5f09700455c
[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" "bc21f300c28d7fb9597cea5d8fbcb55ab0020d785b618fa05342a5f09700455c", kill_on_drop: false }`
[INFO] [stderr]    Compiling lazy_static v0.2.11
[INFO] [stderr]    Compiling proc-macro2 v0.4.24
[INFO] [stderr]    Compiling num-iter v0.1.37
[INFO] [stderr]    Compiling lazy_static v1.3.0
[INFO] [stderr]    Compiling bitflags v0.4.0
[INFO] [stderr]    Compiling serde v1.0.33
[INFO] [stderr]    Compiling encode_unicode v0.1.3
[INFO] [stderr]    Compiling unicode-width v0.1.4
[INFO] [stderr]    Compiling bit-vec v0.4.4
[INFO] [stderr]    Compiling memchr v2.0.1
[INFO] [stderr]    Compiling crossbeam-utils v0.2.2
[INFO] [stderr]    Compiling num-integer v0.1.39
[INFO] [stderr]    Compiling num-complex v0.2.1
[INFO] [stderr]    Compiling nix v0.5.1
[INFO] [stderr]    Compiling colored v1.6.0
[INFO] [stderr]    Compiling crossbeam-epoch v0.3.0
[INFO] [stderr]    Compiling csv-core v0.1.4
[INFO] [stderr]    Compiling num-bigint v0.2.2
[INFO] [stderr]    Compiling crossbeam-deque v0.2.0
[INFO] [stderr]    Compiling rayon-core v1.4.0
[INFO] [stderr]    Compiling num-rational v0.2.1
[INFO] [stderr]    Compiling quote v0.6.10
[INFO] [stderr]    Compiling rayon v1.0.1
[INFO] [stderr]    Compiling syn v0.15.25
[INFO] [stderr]    Compiling num v0.2.0
[INFO] [stderr]    Compiling rustyline v1.0.0
[INFO] [stderr]    Compiling csv v1.0.0-beta.5
[INFO] [stderr]    Compiling lisp-macros v0.1.0 (/opt/rustwide/workdir/lisp-macros)
[INFO] [stdout] warning: unused variable: `function`
[INFO] [stdout]   --> lisp-macros/lib.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |     let function = function::parse(&fn_item).unwrap();
[INFO] [stdout]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_function`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `attr_ts`
[INFO] [stdout]   --> lisp-macros/lib.rs:12:16
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub fn lisp_fn(attr_ts: TokenStream, fn_ts: TokenStream) -> TokenStream {
[INFO] [stdout]    |                ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_attr_ts`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling euler_lisp v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused `#[macro_use]` import
[INFO] [stdout]  --> src/lib.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | #[macro_use]
[INFO] [stdout]   | ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `#[macro_use]` import
[INFO] [stdout]  --> src/lib.rs:6:1
[INFO] [stdout]   |
[INFO] [stdout] 6 | #[macro_use]
[INFO] [stdout]   | ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fs`
[INFO] [stdout]  --> src/debugger.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::fs;
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fs::File`
[INFO] [stdout]  --> src/debugger.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::fs::File;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::Read`
[INFO] [stdout]  --> src/debugger.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::io::Read;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::rc::Rc`
[INFO] [stdout]  --> src/debugger.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::rc::Rc;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `BuiltinRegistry`, `self`
[INFO] [stdout]  --> src/debugger.rs:6:22
[INFO] [stdout]   |
[INFO] [stdout] 6 | use crate::builtin::{self, BuiltinRegistry};
[INFO] [stdout]   |                      ^^^^  ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Program`
[INFO] [stdout]  --> src/debugger.rs:7:33
[INFO] [stdout]   |
[INFO] [stdout] 7 | use crate::compiler::{Compiler, Program};
[INFO] [stdout]   |                                 ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Instruction`, `LabeledInstruction`
[INFO] [stdout]  --> src/debugger.rs:8:26
[INFO] [stdout]   |
[INFO] [stdout] 8 | use crate::instruction::{Instruction, LabeledInstruction};
[INFO] [stdout]   |                          ^^^^^^^^^^^  ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::symbol_table::Symbol`
[INFO] [stdout]   --> src/debugger.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use crate::symbol_table::Symbol;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::vm::Context`
[INFO] [stdout]   --> src/debugger.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | use crate::vm::Context;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Arity`, `LispFn1`, `LispFn2`, `LispFn3`, `LispFnN`
[INFO] [stdout]   --> src/debugger.rs:13:13
[INFO] [stdout]    |
[INFO] [stdout] 13 | use crate::{Arity, LispFn1, LispFn2, LispFn3, LispFnN};
[INFO] [stdout]    |             ^^^^^  ^^^^^^^  ^^^^^^^  ^^^^^^^  ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Hash`, `Hasher`
[INFO] [stdout]  --> src/value.rs:6:17
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::hash::{Hash, Hasher};
[INFO] [stdout]   |                 ^^^^  ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/value.rs:42:16
[INFO] [stdout]    |
[INFO] [stdout] 42 |     Foreign(Rc<ForeignValue>),
[INFO] [stdout]    |                ^^^^^^^^^^^^ help: use `dyn`: `dyn ForeignValue`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/vm/mod.rs:103:28
[INFO] [stdout]     |
[INFO] [stdout] 103 |     pub output: Rc<RefCell<Write>>,
[INFO] [stdout]     |                            ^^^^^ help: use `dyn`: `dyn Write`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/vm/mod.rs:110:35
[INFO] [stdout]     |
[INFO] [stdout] 110 |     pub fn new(output: Rc<RefCell<Write>>) -> VM {
[INFO] [stdout]     |                                   ^^^^^ help: use `dyn`: `dyn Write`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/builtin/bignum.rs:30:23
[INFO] [stdout]    |
[INFO] [stdout] 30 | pub fn load(reg: &mut BuiltinRegistry) {
[INFO] [stdout]    |                       ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn BuiltinRegistry`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/builtin/bitwise.rs:59:23
[INFO] [stdout]    |
[INFO] [stdout] 59 | pub fn load(reg: &mut BuiltinRegistry) {
[INFO] [stdout]    |                       ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn BuiltinRegistry`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/builtin/comparison.rs:116:23
[INFO] [stdout]     |
[INFO] [stdout] 116 | pub fn load(reg: &mut BuiltinRegistry) {
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn BuiltinRegistry`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/builtin/list.rs:311:23
[INFO] [stdout]     |
[INFO] [stdout] 311 | pub fn load(reg: &mut BuiltinRegistry) {
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn BuiltinRegistry`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::rc::Rc`
[INFO] [stdout]  --> src/builtin/math.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::rc::Rc;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]    --> src/builtin/math.rs:120:5
[INFO] [stdout]     |
[INFO] [stdout] 120 |     (c as isize)
[INFO] [stdout]     |     ^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/builtin/math.rs:735:23
[INFO] [stdout]     |
[INFO] [stdout] 735 | pub fn load(reg: &mut BuiltinRegistry) {
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn BuiltinRegistry`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/builtin/misc.rs:93:23
[INFO] [stdout]    |
[INFO] [stdout] 93 | pub fn load(reg: &mut BuiltinRegistry) {
[INFO] [stdout]    |                       ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn BuiltinRegistry`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/builtin/string.rs:127:23
[INFO] [stdout]     |
[INFO] [stdout] 127 | pub fn load(reg: &mut BuiltinRegistry) {
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn BuiltinRegistry`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/builtin/types.rs:63:23
[INFO] [stdout]    |
[INFO] [stdout] 63 | pub fn load(reg: &mut BuiltinRegistry) {
[INFO] [stdout]    |                       ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn BuiltinRegistry`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/builtin/mod.rs:23:23
[INFO] [stdout]    |
[INFO] [stdout] 23 | pub fn load(reg: &mut BuiltinRegistry) {
[INFO] [stdout]    |                       ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn BuiltinRegistry`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> src/lexer.rs:244:20
[INFO] [stdout]     |
[INFO] [stdout] 244 |                 'A'...'Z' => true,
[INFO] [stdout]     |                    ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(ellipsis_inclusive_range_patterns)]` on by default
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> src/lexer.rs:245:20
[INFO] [stdout]     |
[INFO] [stdout] 245 |                 'a'...'z' => true,
[INFO] [stdout]     |                    ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> src/lexer.rs:246:20
[INFO] [stdout]     |
[INFO] [stdout] 246 |                 '0'...'9' => true,
[INFO] [stdout]     |                    ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> src/lexer.rs:498:28
[INFO] [stdout]     |
[INFO] [stdout] 498 |                 first @ 'A'...'Z'
[INFO] [stdout]     |                            ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> src/lexer.rs:499:30
[INFO] [stdout]     |
[INFO] [stdout] 499 |                 | first @ 'a'...'z'
[INFO] [stdout]     |                              ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> src/lexer.rs:513:28
[INFO] [stdout]     |
[INFO] [stdout] 513 |                 first @ '0'...'9' => {
[INFO] [stdout]     |                            ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Cell`
[INFO] [stdout]   --> src/lib.rs:28:17
[INFO] [stdout]    |
[INFO] [stdout] 28 | use std::cell::{Cell, Ref, RefCell};
[INFO] [stdout]    |                 ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/doc.rs:55:61
[INFO] [stdout]    |
[INFO] [stdout] 55 |         Err(why) => panic!("couldn't spawn pandoc: {}", why.description()),
[INFO] [stdout]    |                                                             ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/doc.rs:60:70
[INFO] [stdout]    |
[INFO] [stdout] 60 |         Err(why) => panic!("couldn't write to pandoc stdin: {}", why.description()),
[INFO] [stdout]    |                                                                      ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]    --> src/vm/mod.rs:623:17
[INFO] [stdout]     |
[INFO] [stdout] 622 |                 unimplemented!();
[INFO] [stdout]     |                 ----------------- any code following this expression is unreachable
[INFO] [stdout] 623 |                 let input = self.val.take();
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unreachable statement
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Hasher`
[INFO] [stdout]   --> src/lib.rs:31:23
[INFO] [stdout]    |
[INFO] [stdout] 31 | use std::hash::{Hash, Hasher};
[INFO] [stdout]    |                       ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]    --> src/compiler/mod.rs:768:17
[INFO] [stdout]     |
[INFO] [stdout] 767 |                 VAR_ADD => {}
[INFO] [stdout]     |                 ------- matches any value
[INFO] [stdout] 768 |                 _ => {}
[INFO] [stdout]     |                 ^ unreachable pattern
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]    --> src/lexer.rs:151:13
[INFO] [stdout]     |
[INFO] [stdout] 151 |             _ => unimplemented!(),
[INFO] [stdout]     |             ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `error`
[INFO] [stdout]   --> src/lib.rs:41:13
[INFO] [stdout]    |
[INFO] [stdout] 41 |     fn from(error: std::option::NoneError) -> Self {
[INFO] [stdout]    |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_error`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `indent`
[INFO] [stdout]    --> src/code_formatter.rs:356:9
[INFO] [stdout]     |
[INFO] [stdout] 356 |         indent: bool,
[INFO] [stdout]     |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_indent`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `dec`
[INFO] [stdout]    --> src/code_formatter.rs:399:27
[INFO] [stdout]     |
[INFO] [stdout] 399 |             Element::List(dec, bindings, _, _, _) => {
[INFO] [stdout]     |                           ^^^ help: if this is intentional, prefix it with an underscore: `_dec`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `indent`
[INFO] [stdout]    --> src/code_formatter.rs:392:53
[INFO] [stdout]     |
[INFO] [stdout] 392 |     pub fn print_let(&mut self, els: &Vec<Element>, indent: bool, newline: bool) {
[INFO] [stdout]     |                                                     ^^^^^^ help: if this is intentional, prefix it with an underscore: `_indent`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `indent`
[INFO] [stdout]    --> src/code_formatter.rs:441:52
[INFO] [stdout]     |
[INFO] [stdout] 441 |     pub fn print_if(&mut self, els: &Vec<Element>, indent: bool, newline: bool) {
[INFO] [stdout]     |                                                    ^^^^^^ help: if this is intentional, prefix it with an underscore: `_indent`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `indent`
[INFO] [stdout]    --> src/code_formatter.rs:467:52
[INFO] [stdout]     |
[INFO] [stdout] 467 |     pub fn print_fn(&mut self, els: &Vec<Element>, indent: bool, newline: bool) {
[INFO] [stdout]     |                                                    ^^^^^^ help: if this is intentional, prefix it with an underscore: `_indent`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `indent`
[INFO] [stdout]    --> src/code_formatter.rs:493:54
[INFO] [stdout]     |
[INFO] [stdout] 493 |     pub fn print_when(&mut self, els: &Vec<Element>, indent: bool, newline: bool) {
[INFO] [stdout]     |                                                      ^^^^^^ help: if this is intentional, prefix it with an underscore: `_indent`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/code_formatter.rs:521:17
[INFO] [stdout]     |
[INFO] [stdout] 521 |             for i in 0..self.indentation {
[INFO] [stdout]     |                 ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `start`
[INFO] [stdout]    --> src/code_formatter.rs:527:40
[INFO] [stdout]     |
[INFO] [stdout] 527 |             Element::List(dec, els, _, start, end) => {
[INFO] [stdout]     |                                        ^^^^^ help: if this is intentional, prefix it with an underscore: `_start`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `end`
[INFO] [stdout]    --> src/code_formatter.rs:527:47
[INFO] [stdout]     |
[INFO] [stdout] 527 |             Element::List(dec, els, _, start, end) => {
[INFO] [stdout]     |                                               ^^^ help: if this is intentional, prefix it with an underscore: `_end`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `tail`
[INFO] [stdout]    --> src/code_formatter.rs:582:43
[INFO] [stdout]     |
[INFO] [stdout] 582 |             Element::DottedList(dec, els, tail, _, start, end) => {
[INFO] [stdout]     |                                           ^^^^ help: if this is intentional, prefix it with an underscore: `_tail`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `start`
[INFO] [stdout]    --> src/code_formatter.rs:582:52
[INFO] [stdout]     |
[INFO] [stdout] 582 |             Element::DottedList(dec, els, tail, _, start, end) => {
[INFO] [stdout]     |                                                    ^^^^^ help: if this is intentional, prefix it with an underscore: `_start`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `end`
[INFO] [stdout]    --> src/code_formatter.rs:582:59
[INFO] [stdout]     |
[INFO] [stdout] 582 |             Element::DottedList(dec, els, tail, _, start, end) => {
[INFO] [stdout]     |                                                           ^^^ help: if this is intentional, prefix it with an underscore: `_end`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `start`
[INFO] [stdout]    --> src/code_formatter.rs:601:44
[INFO] [stdout]     |
[INFO] [stdout] 601 |             Element::Literal(dec, body, _, start, end) => {
[INFO] [stdout]     |                                            ^^^^^ help: if this is intentional, prefix it with an underscore: `_start`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `end`
[INFO] [stdout]    --> src/code_formatter.rs:601:51
[INFO] [stdout]     |
[INFO] [stdout] 601 |             Element::Literal(dec, body, _, start, end) => {
[INFO] [stdout]     |                                                   ^^^ help: if this is intentional, prefix it with an underscore: `_end`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `start`
[INFO] [stdout]    --> src/code_formatter.rs:609:36
[INFO] [stdout]     |
[INFO] [stdout] 609 |             Element::Comment(body, start, end) => {
[INFO] [stdout]     |                                    ^^^^^ help: if this is intentional, prefix it with an underscore: `_start`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `end`
[INFO] [stdout]    --> src/code_formatter.rs:609:43
[INFO] [stdout]     |
[INFO] [stdout] 609 |             Element::Comment(body, start, end) => {
[INFO] [stdout]     |                                           ^^^ help: if this is intentional, prefix it with an underscore: `_end`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `VAR_ADD`
[INFO] [stdout]    --> src/compiler/mod.rs:767:17
[INFO] [stdout]     |
[INFO] [stdout] 767 |                 VAR_ADD => {}
[INFO] [stdout]     |                 ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_VAR_ADD`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v`
[INFO] [stdout]   --> src/compiler/error.rs:26:47
[INFO] [stdout]    |
[INFO] [stdout] 26 |             Error::NoMatchingMacroPattern(ref 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/compiler/error.rs:30:48
[INFO] [stdout]    |
[INFO] [stdout] 30 |             Error::InvalidFunctionArgument(ref 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/compiler/error.rs:56:47
[INFO] [stdout]    |
[INFO] [stdout] 56 |             Error::NoMatchingMacroPattern(ref 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/compiler/error.rs:60:48
[INFO] [stdout]    |
[INFO] [stdout] 60 |             Error::InvalidFunctionArgument(ref v) => {
[INFO] [stdout]    |                                                ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `other`
[INFO] [stdout]    --> src/value.rs:131:13
[INFO] [stdout]     |
[INFO] [stdout] 131 |             other => {
[INFO] [stdout]     |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_other`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]    --> src/value.rs:211:14
[INFO] [stdout]     |
[INFO] [stdout] 211 |             (a, b) => panic!("Can't compare"),
[INFO] [stdout]     |              ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]    --> src/value.rs:211:17
[INFO] [stdout]     |
[INFO] [stdout] 211 |             (a, b) => panic!("Can't compare"),
[INFO] [stdout]     |                 ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `vm`
[INFO] [stdout]    --> src/builtin/list.rs:201:37
[INFO] [stdout]     |
[INFO] [stdout] 201 | fn join(joiner: Value, list: Value, vm: &VM) -> LispResult<Value> {
[INFO] [stdout]     |                                     ^^ help: if this is intentional, prefix it with an underscore: `_vm`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `vm`
[INFO] [stdout]   --> src/builtin/string.rs:51:33
[INFO] [stdout]    |
[INFO] [stdout] 51 | fn string_str(vs: &mut [Value], vm: &VM) -> LispResult<Value> {
[INFO] [stdout]    |                                 ^^ help: if this is intentional, prefix it with an underscore: `_vm`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `source`
[INFO] [stdout]    --> src/lexer.rs:181:40
[INFO] [stdout]     |
[INFO] [stdout] 181 |     pub fn from_string(string: String, source: Option<String>) -> Self {
[INFO] [stdout]     |                                        ^^^^^^ help: if this is intentional, prefix it with an underscore: `_source`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `compiler`
[INFO] [stdout]   --> src/debugger.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 20 |     compiler: Compiler,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `constants`
[INFO] [stdout]   --> src/debugger.rs:21:5
[INFO] [stdout]    |
[INFO] [stdout] 21 |     constants: Vec<Value>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `globals`
[INFO] [stdout]   --> src/debugger.rs:22:5
[INFO] [stdout]    |
[INFO] [stdout] 22 |     globals: Vec<String>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `parser`
[INFO] [stdout]   --> src/debugger.rs:23:5
[INFO] [stdout]    |
[INFO] [stdout] 23 |     parser: Parser,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `fun`
[INFO] [stdout]   --> src/vm/mod.rs:98:5
[INFO] [stdout]    |
[INFO] [stdout] 98 |     fun: Value,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `VAR_ADD` should have a snake case name
[INFO] [stdout]    --> src/compiler/mod.rs:767:17
[INFO] [stdout]     |
[INFO] [stdout] 767 |                 VAR_ADD => {}
[INFO] [stdout]     |                 ^^^^^^^ help: convert the identifier to snake case: `var_add`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/vm/mod.rs:149:9
[INFO] [stdout]     |
[INFO] [stdout] 149 |         self.run();
[INFO] [stdout]     |         ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/vm/mod.rs:193:13
[INFO] [stdout]     |
[INFO] [stdout] 193 |             self.run();
[INFO] [stdout]     |             ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/vm/mod.rs:618:17
[INFO] [stdout]     |
[INFO] [stdout] 618 |                 self.invoke_function(fun, args, false);
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/vm/mod.rs:665:17
[INFO] [stdout]     |
[INFO] [stdout] 665 |                 self.bytecode.restore_pc();
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 78 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `euler_lisp::debugger::Debugger`
[INFO] [stdout]   --> src/main.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | use euler_lisp::debugger::Debugger;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> src/main.rs:96:28
[INFO] [stdout]    |
[INFO] [stdout] 96 |             None => panic!(format!("No reference solution for {}", problem)),
[INFO] [stdout]    |                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_fmt_panic)]` on by default
[INFO] [stdout]    = note: this is no longer accepted in Rust 2021
[INFO] [stdout]    = note: the panic!() macro supports formatting, so there's no need for the format!() macro here
[INFO] [stdout] help: remove the `format!(..)` macro call
[INFO] [stdout]    |
[INFO] [stdout] 96 |             None => panic!("No reference solution for {}", problem),
[INFO] [stdout]    |                           --                                     --
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/main.rs:143:32
[INFO] [stdout]     |
[INFO] [stdout] 143 |                         panic!(format!("Could not find file for problem {}", problem));
[INFO] [stdout]     |                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this is no longer accepted in Rust 2021
[INFO] [stdout]     = note: the panic!() macro supports formatting, so there's no need for the format!() macro here
[INFO] [stdout] help: remove the `format!(..)` macro call
[INFO] [stdout]     |
[INFO] [stdout] 143 |                         panic!("Could not find file for problem {}", problem);
[INFO] [stdout]     |                               --                                           --
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/main.rs:184:32
[INFO] [stdout]     |
[INFO] [stdout] 184 |                         panic!(format!("Invalid solution entry: {:?}", record));
[INFO] [stdout]     |                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this is no longer accepted in Rust 2021
[INFO] [stdout]     = note: the panic!() macro supports formatting, so there's no need for the format!() macro here
[INFO] [stdout] help: remove the `format!(..)` macro call
[INFO] [stdout]     |
[INFO] [stdout] 184 |                         panic!("Invalid solution entry: {:?}", record);
[INFO] [stdout]     |                               --                                    --
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:82:9
[INFO] [stdout]    |
[INFO] [stdout] 82 |         vm.run();
[INFO] [stdout]    |         ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:154:21
[INFO] [stdout]     |
[INFO] [stdout] 154 |                     vm.run();
[INFO] [stdout]     |                     ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 48.95s
[INFO] running `Command { std: "docker" "inspect" "bc21f300c28d7fb9597cea5d8fbcb55ab0020d785b618fa05342a5f09700455c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bc21f300c28d7fb9597cea5d8fbcb55ab0020d785b618fa05342a5f09700455c", kill_on_drop: false }`
[INFO] [stdout] bc21f300c28d7fb9597cea5d8fbcb55ab0020d785b618fa05342a5f09700455c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+881c1ac408d93bb7adaa3a51dabab9266e82eee8" "test" "--frozen" "--no-run" "--message-format=json", 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] 01411e339efb18b3cce66c74b6c84cbdbf5db15fdb5d0948163b4399ceefac6c
[INFO] running `Command { std: "docker" "start" "-a" "01411e339efb18b3cce66c74b6c84cbdbf5db15fdb5d0948163b4399ceefac6c", kill_on_drop: false }`
[INFO] [stdout] warning: unused variable: `function`
[INFO] [stdout]   --> lisp-macros/lib.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |     let function = function::parse(&fn_item).unwrap();
[INFO] [stdout]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_function`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `attr_ts`
[INFO] [stdout]   --> lisp-macros/lib.rs:12:16
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub fn lisp_fn(attr_ts: TokenStream, fn_ts: TokenStream) -> TokenStream {
[INFO] [stdout]    |                ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_attr_ts`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `#[macro_use]` import
[INFO] [stdout]  --> src/lib.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | #[macro_use]
[INFO] [stdout]   | ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `#[macro_use]` import
[INFO] [stdout]  --> src/lib.rs:6:1
[INFO] [stdout]   |
[INFO] [stdout] 6 | #[macro_use]
[INFO] [stdout]   | ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fs`
[INFO] [stdout]  --> src/debugger.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::fs;
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fs::File`
[INFO] [stdout]  --> src/debugger.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::fs::File;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::Read`
[INFO] [stdout]  --> src/debugger.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::io::Read;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::rc::Rc`
[INFO] [stdout]  --> src/debugger.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::rc::Rc;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `BuiltinRegistry`, `self`
[INFO] [stdout]  --> src/debugger.rs:6:22
[INFO] [stdout]   |
[INFO] [stdout] 6 | use crate::builtin::{self, BuiltinRegistry};
[INFO] [stdout]   |                      ^^^^  ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Program`
[INFO] [stdout]  --> src/debugger.rs:7:33
[INFO] [stdout]   |
[INFO] [stdout] 7 | use crate::compiler::{Compiler, Program};
[INFO] [stdout]   |                                 ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Instruction`, `LabeledInstruction`
[INFO] [stdout]  --> src/debugger.rs:8:26
[INFO] [stdout]   |
[INFO] [stdout] 8 | use crate::instruction::{Instruction, LabeledInstruction};
[INFO] [stdout]   |                          ^^^^^^^^^^^  ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::symbol_table::Symbol`
[INFO] [stdout]   --> src/debugger.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use crate::symbol_table::Symbol;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::vm::Context`
[INFO] [stdout]   --> src/debugger.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | use crate::vm::Context;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Arity`, `LispFn1`, `LispFn2`, `LispFn3`, `LispFnN`
[INFO] [stdout]   --> src/debugger.rs:13:13
[INFO] [stdout]    |
[INFO] [stdout] 13 | use crate::{Arity, LispFn1, LispFn2, LispFn3, LispFnN};
[INFO] [stdout]    |             ^^^^^  ^^^^^^^  ^^^^^^^  ^^^^^^^  ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Hash`, `Hasher`
[INFO] [stdout]  --> src/value.rs:6:17
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::hash::{Hash, Hasher};
[INFO] [stdout]   |                 ^^^^  ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/value.rs:42:16
[INFO] [stdout]    |
[INFO] [stdout] 42 |     Foreign(Rc<ForeignValue>),
[INFO] [stdout]    |                ^^^^^^^^^^^^ help: use `dyn`: `dyn ForeignValue`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/vm/mod.rs:103:28
[INFO] [stdout]     |
[INFO] [stdout] 103 |     pub output: Rc<RefCell<Write>>,
[INFO] [stdout]     |                            ^^^^^ help: use `dyn`: `dyn Write`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/vm/mod.rs:110:35
[INFO] [stdout]     |
[INFO] [stdout] 110 |     pub fn new(output: Rc<RefCell<Write>>) -> VM {
[INFO] [stdout]     |                                   ^^^^^ help: use `dyn`: `dyn Write`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/builtin/bignum.rs:30:23
[INFO] [stdout]    |
[INFO] [stdout] 30 | pub fn load(reg: &mut BuiltinRegistry) {
[INFO] [stdout]    |                       ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn BuiltinRegistry`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/builtin/bitwise.rs:59:23
[INFO] [stdout]    |
[INFO] [stdout] 59 | pub fn load(reg: &mut BuiltinRegistry) {
[INFO] [stdout]    |                       ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn BuiltinRegistry`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/builtin/comparison.rs:116:23
[INFO] [stdout]     |
[INFO] [stdout] 116 | pub fn load(reg: &mut BuiltinRegistry) {
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn BuiltinRegistry`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/builtin/list.rs:311:23
[INFO] [stdout]     |
[INFO] [stdout] 311 | pub fn load(reg: &mut BuiltinRegistry) {
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn BuiltinRegistry`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::rc::Rc`
[INFO] [stdout]  --> src/builtin/math.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::rc::Rc;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]    --> src/builtin/math.rs:120:5
[INFO] [stdout]     |
[INFO] [stdout] 120 |     (c as isize)
[INFO] [stdout]     |     ^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/builtin/math.rs:735:23
[INFO] [stdout]     |
[INFO] [stdout] 735 | pub fn load(reg: &mut BuiltinRegistry) {
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn BuiltinRegistry`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/builtin/misc.rs:93:23
[INFO] [stdout]    |
[INFO] [stdout] 93 | pub fn load(reg: &mut BuiltinRegistry) {
[INFO] [stdout]    |                       ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn BuiltinRegistry`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/builtin/string.rs:127:23
[INFO] [stdout]     |
[INFO] [stdout] 127 | pub fn load(reg: &mut BuiltinRegistry) {
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn BuiltinRegistry`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/builtin/types.rs:63:23
[INFO] [stdout]    |
[INFO] [stdout] 63 | pub fn load(reg: &mut BuiltinRegistry) {
[INFO] [stdout]    |                       ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn BuiltinRegistry`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/builtin/mod.rs:23:23
[INFO] [stdout]    |
[INFO] [stdout] 23 | pub fn load(reg: &mut BuiltinRegistry) {
[INFO] [stdout]    |                       ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn BuiltinRegistry`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> src/lexer.rs:244:20
[INFO] [stdout]     |
[INFO] [stdout] 244 |                 'A'...'Z' => true,
[INFO] [stdout]     |                    ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(ellipsis_inclusive_range_patterns)]` on by default
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> src/lexer.rs:245:20
[INFO] [stdout]     |
[INFO] [stdout] 245 |                 'a'...'z' => true,
[INFO] [stdout]     |                    ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> src/lexer.rs:246:20
[INFO] [stdout]     |
[INFO] [stdout] 246 |                 '0'...'9' => true,
[INFO] [stdout]     |                    ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> src/lexer.rs:498:28
[INFO] [stdout]     |
[INFO] [stdout] 498 |                 first @ 'A'...'Z'
[INFO] [stdout]     |                            ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> src/lexer.rs:499:30
[INFO] [stdout]     |
[INFO] [stdout] 499 |                 | first @ 'a'...'z'
[INFO] [stdout]     |                              ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> src/lexer.rs:513:28
[INFO] [stdout]     |
[INFO] [stdout] 513 |                 first @ '0'...'9' => {
[INFO] [stdout]     |                            ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Cell`
[INFO] [stdout]   --> src/lib.rs:28:17
[INFO] [stdout]    |
[INFO] [stdout] 28 | use std::cell::{Cell, Ref, RefCell};
[INFO] [stdout]    |                 ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/doc.rs:55:61
[INFO] [stdout]    |
[INFO] [stdout] 55 |         Err(why) => panic!("couldn't spawn pandoc: {}", why.description()),
[INFO] [stdout]    |                                                             ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/doc.rs:60:70
[INFO] [stdout]    |
[INFO] [stdout] 60 |         Err(why) => panic!("couldn't write to pandoc stdin: {}", why.description()),
[INFO] [stdout]    |                                                                      ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]    --> src/vm/mod.rs:623:17
[INFO] [stdout]     |
[INFO] [stdout] 622 |                 unimplemented!();
[INFO] [stdout]     |                 ----------------- any code following this expression is unreachable
[INFO] [stdout] 623 |                 let input = self.val.take();
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unreachable statement
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Hasher`
[INFO] [stdout]   --> src/lib.rs:31:23
[INFO] [stdout]    |
[INFO] [stdout] 31 | use std::hash::{Hash, Hasher};
[INFO] [stdout]    |                       ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]    --> src/compiler/mod.rs:768:17
[INFO] [stdout]     |
[INFO] [stdout] 767 |                 VAR_ADD => {}
[INFO] [stdout]     |                 ------- matches any value
[INFO] [stdout] 768 |                 _ => {}
[INFO] [stdout]     |                 ^ unreachable pattern
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]    --> src/lexer.rs:151:13
[INFO] [stdout]     |
[INFO] [stdout] 151 |             _ => unimplemented!(),
[INFO] [stdout]     |             ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `error`
[INFO] [stdout]   --> src/lib.rs:41:13
[INFO] [stdout]    |
[INFO] [stdout] 41 |     fn from(error: std::option::NoneError) -> Self {
[INFO] [stdout]    |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_error`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `indent`
[INFO] [stdout]    --> src/code_formatter.rs:356:9
[INFO] [stdout]     |
[INFO] [stdout] 356 |         indent: bool,
[INFO] [stdout]     |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_indent`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `dec`
[INFO] [stdout]    --> src/code_formatter.rs:399:27
[INFO] [stdout]     |
[INFO] [stdout] 399 |             Element::List(dec, bindings, _, _, _) => {
[INFO] [stdout]     |                           ^^^ help: if this is intentional, prefix it with an underscore: `_dec`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `indent`
[INFO] [stdout]    --> src/code_formatter.rs:392:53
[INFO] [stdout]     |
[INFO] [stdout] 392 |     pub fn print_let(&mut self, els: &Vec<Element>, indent: bool, newline: bool) {
[INFO] [stdout]     |                                                     ^^^^^^ help: if this is intentional, prefix it with an underscore: `_indent`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `indent`
[INFO] [stdout]    --> src/code_formatter.rs:441:52
[INFO] [stdout]     |
[INFO] [stdout] 441 |     pub fn print_if(&mut self, els: &Vec<Element>, indent: bool, newline: bool) {
[INFO] [stdout]     |                                                    ^^^^^^ help: if this is intentional, prefix it with an underscore: `_indent`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `indent`
[INFO] [stdout]    --> src/code_formatter.rs:467:52
[INFO] [stdout]     |
[INFO] [stdout] 467 |     pub fn print_fn(&mut self, els: &Vec<Element>, indent: bool, newline: bool) {
[INFO] [stdout]     |                                                    ^^^^^^ help: if this is intentional, prefix it with an underscore: `_indent`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling euler_lisp v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `indent`
[INFO] [stdout]    --> src/code_formatter.rs:493:54
[INFO] [stdout]     |
[INFO] [stdout] 493 |     pub fn print_when(&mut self, els: &Vec<Element>, indent: bool, newline: bool) {
[INFO] [stdout]     |                                                      ^^^^^^ help: if this is intentional, prefix it with an underscore: `_indent`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/code_formatter.rs:521:17
[INFO] [stdout]     |
[INFO] [stdout] 521 |             for i in 0..self.indentation {
[INFO] [stdout]     |                 ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `start`
[INFO] [stdout]    --> src/code_formatter.rs:527:40
[INFO] [stdout]     |
[INFO] [stdout] 527 |             Element::List(dec, els, _, start, end) => {
[INFO] [stdout]     |                                        ^^^^^ help: if this is intentional, prefix it with an underscore: `_start`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `end`
[INFO] [stdout]    --> src/code_formatter.rs:527:47
[INFO] [stdout]     |
[INFO] [stdout] 527 |             Element::List(dec, els, _, start, end) => {
[INFO] [stdout]     |                                               ^^^ help: if this is intentional, prefix it with an underscore: `_end`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `tail`
[INFO] [stdout]    --> src/code_formatter.rs:582:43
[INFO] [stdout]     |
[INFO] [stdout] 582 |             Element::DottedList(dec, els, tail, _, start, end) => {
[INFO] [stdout]     |                                           ^^^^ help: if this is intentional, prefix it with an underscore: `_tail`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `start`
[INFO] [stdout]    --> src/code_formatter.rs:582:52
[INFO] [stdout]     |
[INFO] [stdout] 582 |             Element::DottedList(dec, els, tail, _, start, end) => {
[INFO] [stdout]     |                                                    ^^^^^ help: if this is intentional, prefix it with an underscore: `_start`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `end`
[INFO] [stdout]    --> src/code_formatter.rs:582:59
[INFO] [stdout]     |
[INFO] [stdout] 582 |             Element::DottedList(dec, els, tail, _, start, end) => {
[INFO] [stdout]     |                                                           ^^^ help: if this is intentional, prefix it with an underscore: `_end`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `start`
[INFO] [stdout]    --> src/code_formatter.rs:601:44
[INFO] [stdout]     |
[INFO] [stdout] 601 |             Element::Literal(dec, body, _, start, end) => {
[INFO] [stdout]     |                                            ^^^^^ help: if this is intentional, prefix it with an underscore: `_start`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `end`
[INFO] [stdout]    --> src/code_formatter.rs:601:51
[INFO] [stdout]     |
[INFO] [stdout] 601 |             Element::Literal(dec, body, _, start, end) => {
[INFO] [stdout]     |                                                   ^^^ help: if this is intentional, prefix it with an underscore: `_end`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `start`
[INFO] [stdout]    --> src/code_formatter.rs:609:36
[INFO] [stdout]     |
[INFO] [stdout] 609 |             Element::Comment(body, start, end) => {
[INFO] [stdout]     |                                    ^^^^^ help: if this is intentional, prefix it with an underscore: `_start`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `end`
[INFO] [stdout]    --> src/code_formatter.rs:609:43
[INFO] [stdout]     |
[INFO] [stdout] 609 |             Element::Comment(body, start, end) => {
[INFO] [stdout]     |                                           ^^^ help: if this is intentional, prefix it with an underscore: `_end`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `VAR_ADD`
[INFO] [stdout]    --> src/compiler/mod.rs:767:17
[INFO] [stdout]     |
[INFO] [stdout] 767 |                 VAR_ADD => {}
[INFO] [stdout]     |                 ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_VAR_ADD`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v`
[INFO] [stdout]   --> src/compiler/error.rs:26:47
[INFO] [stdout]    |
[INFO] [stdout] 26 |             Error::NoMatchingMacroPattern(ref 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/compiler/error.rs:30:48
[INFO] [stdout]    |
[INFO] [stdout] 30 |             Error::InvalidFunctionArgument(ref 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/compiler/error.rs:56:47
[INFO] [stdout]    |
[INFO] [stdout] 56 |             Error::NoMatchingMacroPattern(ref 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/compiler/error.rs:60:48
[INFO] [stdout]    |
[INFO] [stdout] 60 |             Error::InvalidFunctionArgument(ref v) => {
[INFO] [stdout]    |                                                ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `other`
[INFO] [stdout]    --> src/value.rs:131:13
[INFO] [stdout]     |
[INFO] [stdout] 131 |             other => {
[INFO] [stdout]     |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_other`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]    --> src/value.rs:211:14
[INFO] [stdout]     |
[INFO] [stdout] 211 |             (a, b) => panic!("Can't compare"),
[INFO] [stdout]     |              ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]    --> src/value.rs:211:17
[INFO] [stdout]     |
[INFO] [stdout] 211 |             (a, b) => panic!("Can't compare"),
[INFO] [stdout]     |                 ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `vm`
[INFO] [stdout]    --> src/builtin/list.rs:201:37
[INFO] [stdout]     |
[INFO] [stdout] 201 | fn join(joiner: Value, list: Value, vm: &VM) -> LispResult<Value> {
[INFO] [stdout]     |                                     ^^ help: if this is intentional, prefix it with an underscore: `_vm`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `vm`
[INFO] [stdout]   --> src/builtin/string.rs:51:33
[INFO] [stdout]    |
[INFO] [stdout] 51 | fn string_str(vs: &mut [Value], vm: &VM) -> LispResult<Value> {
[INFO] [stdout]    |                                 ^^ help: if this is intentional, prefix it with an underscore: `_vm`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `source`
[INFO] [stdout]    --> src/lexer.rs:181:40
[INFO] [stdout]     |
[INFO] [stdout] 181 |     pub fn from_string(string: String, source: Option<String>) -> Self {
[INFO] [stdout]     |                                        ^^^^^^ help: if this is intentional, prefix it with an underscore: `_source`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `compiler`
[INFO] [stdout]   --> src/debugger.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 20 |     compiler: Compiler,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `constants`
[INFO] [stdout]   --> src/debugger.rs:21:5
[INFO] [stdout]    |
[INFO] [stdout] 21 |     constants: Vec<Value>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `globals`
[INFO] [stdout]   --> src/debugger.rs:22:5
[INFO] [stdout]    |
[INFO] [stdout] 22 |     globals: Vec<String>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `parser`
[INFO] [stdout]   --> src/debugger.rs:23:5
[INFO] [stdout]    |
[INFO] [stdout] 23 |     parser: Parser,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `fun`
[INFO] [stdout]   --> src/vm/mod.rs:98:5
[INFO] [stdout]    |
[INFO] [stdout] 98 |     fun: Value,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `VAR_ADD` should have a snake case name
[INFO] [stdout]    --> src/compiler/mod.rs:767:17
[INFO] [stdout]     |
[INFO] [stdout] 767 |                 VAR_ADD => {}
[INFO] [stdout]     |                 ^^^^^^^ help: convert the identifier to snake case: `var_add`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/vm/mod.rs:149:9
[INFO] [stdout]     |
[INFO] [stdout] 149 |         self.run();
[INFO] [stdout]     |         ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/vm/mod.rs:193:13
[INFO] [stdout]     |
[INFO] [stdout] 193 |             self.run();
[INFO] [stdout]     |             ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/vm/mod.rs:618:17
[INFO] [stdout]     |
[INFO] [stdout] 618 |                 self.invoke_function(fun, args, false);
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/vm/mod.rs:665:17
[INFO] [stdout]     |
[INFO] [stdout] 665 |                 self.bytecode.restore_pc();
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 78 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `euler_lisp::debugger::Debugger`
[INFO] [stdout]   --> src/main.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | use euler_lisp::debugger::Debugger;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> src/main.rs:96:28
[INFO] [stdout]    |
[INFO] [stdout] 96 |             None => panic!(format!("No reference solution for {}", problem)),
[INFO] [stdout]    |                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_fmt_panic)]` on by default
[INFO] [stdout]    = note: this is no longer accepted in Rust 2021
[INFO] [stdout]    = note: the panic!() macro supports formatting, so there's no need for the format!() macro here
[INFO] [stdout] help: remove the `format!(..)` macro call
[INFO] [stdout]    |
[INFO] [stdout] 96 |             None => panic!("No reference solution for {}", problem),
[INFO] [stdout]    |                           --                                     --
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/main.rs:143:32
[INFO] [stdout]     |
[INFO] [stdout] 143 |                         panic!(format!("Could not find file for problem {}", problem));
[INFO] [stdout]     |                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this is no longer accepted in Rust 2021
[INFO] [stdout]     = note: the panic!() macro supports formatting, so there's no need for the format!() macro here
[INFO] [stdout] help: remove the `format!(..)` macro call
[INFO] [stdout]     |
[INFO] [stdout] 143 |                         panic!("Could not find file for problem {}", problem);
[INFO] [stdout]     |                               --                                           --
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/main.rs:184:32
[INFO] [stdout]     |
[INFO] [stdout] 184 |                         panic!(format!("Invalid solution entry: {:?}", record));
[INFO] [stdout]     |                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this is no longer accepted in Rust 2021
[INFO] [stdout]     = note: the panic!() macro supports formatting, so there's no need for the format!() macro here
[INFO] [stdout] help: remove the `format!(..)` macro call
[INFO] [stdout]     |
[INFO] [stdout] 184 |                         panic!("Invalid solution entry: {:?}", record);
[INFO] [stdout]     |                               --                                    --
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:82:9
[INFO] [stdout]    |
[INFO] [stdout] 82 |         vm.run();
[INFO] [stdout]    |         ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:154:21
[INFO] [stdout]     |
[INFO] [stdout] 154 |                     vm.run();
[INFO] [stdout]     |                     ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `euler_lisp::debugger::Debugger`
[INFO] [stdout]   --> src/main.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | use euler_lisp::debugger::Debugger;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `#[macro_use]` import
[INFO] [stdout]  --> src/lib.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | #[macro_use]
[INFO] [stdout]   | ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `#[macro_use]` import
[INFO] [stdout]  --> src/lib.rs:6:1
[INFO] [stdout]   |
[INFO] [stdout] 6 | #[macro_use]
[INFO] [stdout]   | ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fs`
[INFO] [stdout]  --> src/debugger.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::fs;
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fs::File`
[INFO] [stdout]  --> src/debugger.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::fs::File;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::Read`
[INFO] [stdout]  --> src/debugger.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::io::Read;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::rc::Rc`
[INFO] [stdout]  --> src/debugger.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::rc::Rc;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `BuiltinRegistry`, `self`
[INFO] [stdout]  --> src/debugger.rs:6:22
[INFO] [stdout]   |
[INFO] [stdout] 6 | use crate::builtin::{self, BuiltinRegistry};
[INFO] [stdout]   |                      ^^^^  ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Program`
[INFO] [stdout]  --> src/debugger.rs:7:33
[INFO] [stdout]   |
[INFO] [stdout] 7 | use crate::compiler::{Compiler, Program};
[INFO] [stdout]   |                                 ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Instruction`, `LabeledInstruction`
[INFO] [stdout]  --> src/debugger.rs:8:26
[INFO] [stdout]   |
[INFO] [stdout] 8 | use crate::instruction::{Instruction, LabeledInstruction};
[INFO] [stdout]   |                          ^^^^^^^^^^^  ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::symbol_table::Symbol`
[INFO] [stdout]   --> src/debugger.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use crate::symbol_table::Symbol;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::vm::Context`
[INFO] [stdout]   --> src/debugger.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | use crate::vm::Context;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Arity`, `LispFn1`, `LispFn2`, `LispFn3`, `LispFnN`
[INFO] [stdout]   --> src/debugger.rs:13:13
[INFO] [stdout]    |
[INFO] [stdout] 13 | use crate::{Arity, LispFn1, LispFn2, LispFn3, LispFnN};
[INFO] [stdout]    |             ^^^^^  ^^^^^^^  ^^^^^^^  ^^^^^^^  ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Hash`, `Hasher`
[INFO] [stdout]  --> src/value.rs:6:17
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::hash::{Hash, Hasher};
[INFO] [stdout]   |                 ^^^^  ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/value.rs:42:16
[INFO] [stdout]    |
[INFO] [stdout] 42 |     Foreign(Rc<ForeignValue>),
[INFO] [stdout]    |                ^^^^^^^^^^^^ help: use `dyn`: `dyn ForeignValue`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/vm/mod.rs:103:28
[INFO] [stdout]     |
[INFO] [stdout] 103 |     pub output: Rc<RefCell<Write>>,
[INFO] [stdout]     |                            ^^^^^ help: use `dyn`: `dyn Write`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/vm/mod.rs:110:35
[INFO] [stdout]     |
[INFO] [stdout] 110 |     pub fn new(output: Rc<RefCell<Write>>) -> VM {
[INFO] [stdout]     |                                   ^^^^^ help: use `dyn`: `dyn Write`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> src/main.rs:96:28
[INFO] [stdout]    |
[INFO] [stdout] 96 |             None => panic!(format!("No reference solution for {}", problem)),
[INFO] [stdout]    |                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_fmt_panic)]` on by default
[INFO] [stdout]    = note: this is no longer accepted in Rust 2021
[INFO] [stdout]    = note: the panic!() macro supports formatting, so there's no need for the format!() macro here
[INFO] [stdout] help: remove the `format!(..)` macro call
[INFO] [stdout]    |
[INFO] [stdout] 96 |             None => panic!("No reference solution for {}", problem),
[INFO] [stdout]    |                           --                                     --
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/main.rs:143:32
[INFO] [stdout]     |
[INFO] [stdout] 143 |                         panic!(format!("Could not find file for problem {}", problem));
[INFO] [stdout]     |                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this is no longer accepted in Rust 2021
[INFO] [stdout]     = note: the panic!() macro supports formatting, so there's no need for the format!() macro here
[INFO] [stdout] help: remove the `format!(..)` macro call
[INFO] [stdout]     |
[INFO] [stdout] 143 |                         panic!("Could not find file for problem {}", problem);
[INFO] [stdout]     |                               --                                           --
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/builtin/bignum.rs:30:23
[INFO] [stdout]    |
[INFO] [stdout] 30 | pub fn load(reg: &mut BuiltinRegistry) {
[INFO] [stdout]    |                       ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn BuiltinRegistry`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/builtin/bitwise.rs:59:23
[INFO] [stdout]    |
[INFO] [stdout] 59 | pub fn load(reg: &mut BuiltinRegistry) {
[INFO] [stdout]    |                       ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn BuiltinRegistry`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/builtin/comparison.rs:116:23
[INFO] [stdout]     |
[INFO] [stdout] 116 | pub fn load(reg: &mut BuiltinRegistry) {
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn BuiltinRegistry`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/builtin/list.rs:311:23
[INFO] [stdout]     |
[INFO] [stdout] 311 | pub fn load(reg: &mut BuiltinRegistry) {
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn BuiltinRegistry`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::rc::Rc`
[INFO] [stdout]  --> src/builtin/math.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::rc::Rc;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]    --> src/builtin/math.rs:120:5
[INFO] [stdout]     |
[INFO] [stdout] 120 |     (c as isize)
[INFO] [stdout]     |     ^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/builtin/math.rs:735:23
[INFO] [stdout]     |
[INFO] [stdout] 735 | pub fn load(reg: &mut BuiltinRegistry) {
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn BuiltinRegistry`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/builtin/misc.rs:93:23
[INFO] [stdout]    |
[INFO] [stdout] 93 | pub fn load(reg: &mut BuiltinRegistry) {
[INFO] [stdout]    |                       ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn BuiltinRegistry`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/main.rs:184:32
[INFO] [stdout]     |
[INFO] [stdout] 184 |                         panic!(format!("Invalid solution entry: {:?}", record));
[INFO] [stdout]     |                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this is no longer accepted in Rust 2021
[INFO] [stdout]     = note: the panic!() macro supports formatting, so there's no need for the format!() macro here
[INFO] [stdout] help: remove the `format!(..)` macro call
[INFO] [stdout]     |
[INFO] [stdout] 184 |                         panic!("Invalid solution entry: {:?}", record);
[INFO] [stdout]     |                               --                                    --
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/builtin/string.rs:127:23
[INFO] [stdout]     |
[INFO] [stdout] 127 | pub fn load(reg: &mut BuiltinRegistry) {
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn BuiltinRegistry`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/builtin/types.rs:63:23
[INFO] [stdout]    |
[INFO] [stdout] 63 | pub fn load(reg: &mut BuiltinRegistry) {
[INFO] [stdout]    |                       ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn BuiltinRegistry`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/builtin/mod.rs:23:23
[INFO] [stdout]    |
[INFO] [stdout] 23 | pub fn load(reg: &mut BuiltinRegistry) {
[INFO] [stdout]    |                       ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn BuiltinRegistry`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> src/lexer.rs:244:20
[INFO] [stdout]     |
[INFO] [stdout] 244 |                 'A'...'Z' => true,
[INFO] [stdout]     |                    ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(ellipsis_inclusive_range_patterns)]` on by default
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> src/lexer.rs:245:20
[INFO] [stdout]     |
[INFO] [stdout] 245 |                 'a'...'z' => true,
[INFO] [stdout]     |                    ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> src/lexer.rs:246:20
[INFO] [stdout]     |
[INFO] [stdout] 246 |                 '0'...'9' => true,
[INFO] [stdout]     |                    ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> src/lexer.rs:498:28
[INFO] [stdout]     |
[INFO] [stdout] 498 |                 first @ 'A'...'Z'
[INFO] [stdout]     |                            ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> src/lexer.rs:499:30
[INFO] [stdout]     |
[INFO] [stdout] 499 |                 | first @ 'a'...'z'
[INFO] [stdout]     |                              ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> src/lexer.rs:513:28
[INFO] [stdout]     |
[INFO] [stdout] 513 |                 first @ '0'...'9' => {
[INFO] [stdout]     |                            ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Cell`
[INFO] [stdout]   --> src/lib.rs:28:17
[INFO] [stdout]    |
[INFO] [stdout] 28 | use std::cell::{Cell, Ref, RefCell};
[INFO] [stdout]    |                 ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:82:9
[INFO] [stdout]    |
[INFO] [stdout] 82 |         vm.run();
[INFO] [stdout]    |         ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:154:21
[INFO] [stdout]     |
[INFO] [stdout] 154 |                     vm.run();
[INFO] [stdout]     |                     ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/doc.rs:55:61
[INFO] [stdout]    |
[INFO] [stdout] 55 |         Err(why) => panic!("couldn't spawn pandoc: {}", why.description()),
[INFO] [stdout]    |                                                             ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/doc.rs:60:70
[INFO] [stdout]    |
[INFO] [stdout] 60 |         Err(why) => panic!("couldn't write to pandoc stdin: {}", why.description()),
[INFO] [stdout]    |                                                                      ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no function or associated item named `default` found for struct `SymbolTable` in the current scope
[INFO] [stdout]    --> src/symbol_table.rs:177:31
[INFO] [stdout]     |
[INFO] [stdout] 11  | pub struct SymbolTable {
[INFO] [stdout]     | ---------------------- function or associated item `default` not found for this
[INFO] [stdout] ...
[INFO] [stdout] 177 |     let mut st = SymbolTable::default();
[INFO] [stdout]     |                               ^^^^^^^ function or associated item not found in `SymbolTable`
[INFO] [stdout]     |
[INFO] [stdout]     = help: items from traits can only be used if the trait is implemented and in scope
[INFO] [stdout]     = note: the following trait defines an item `default`, perhaps you need to implement it:
[INFO] [stdout]             candidate #1: `Default`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]    --> src/vm/mod.rs:623:17
[INFO] [stdout]     |
[INFO] [stdout] 622 |                 unimplemented!();
[INFO] [stdout]     |                 ----------------- any code following this expression is unreachable
[INFO] [stdout] 623 |                 let input = self.val.take();
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unreachable statement
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]    --> src/lexer.rs:588:44
[INFO] [stdout]     |
[INFO] [stdout] 588 |         let mut lexer = Lexer::from_string("#\\n #\\newline", None);
[INFO] [stdout]     |                                            ^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |                                            |
[INFO] [stdout]     |                                            expected struct `std::string::String`, found `&str`
[INFO] [stdout]     |                                            help: try using a conversion method: `"#\\n #\\newline".to_string()`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]    --> src/lexer.rs:601:44
[INFO] [stdout]     |
[INFO] [stdout] 601 |         let mut lexer = Lexer::from_string("#\\s #\\space", None);
[INFO] [stdout]     |                                            ^^^^^^^^^^^^^^^
[INFO] [stdout]     |                                            |
[INFO] [stdout]     |                                            expected struct `std::string::String`, found `&str`
[INFO] [stdout]     |                                            help: try using a conversion method: `"#\\s #\\space".to_string()`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]    --> src/lexer.rs:614:44
[INFO] [stdout]     |
[INFO] [stdout] 614 |         let mut lexer = Lexer::from_string("#\\t #\\tab", None);
[INFO] [stdout]     |                                            ^^^^^^^^^^^^^
[INFO] [stdout]     |                                            |
[INFO] [stdout]     |                                            expected struct `std::string::String`, found `&str`
[INFO] [stdout]     |                                            help: try using a conversion method: `"#\\t #\\tab".to_string()`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Hasher`
[INFO] [stdout]   --> src/lib.rs:31:23
[INFO] [stdout]    |
[INFO] [stdout] 31 | use std::hash::{Hash, Hasher};
[INFO] [stdout]    |                       ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 4 previous errors; 38 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0308, E0599.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `euler_lisp`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "01411e339efb18b3cce66c74b6c84cbdbf5db15fdb5d0948163b4399ceefac6c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "01411e339efb18b3cce66c74b6c84cbdbf5db15fdb5d0948163b4399ceefac6c", kill_on_drop: false }`
[INFO] [stdout] 01411e339efb18b3cce66c74b6c84cbdbf5db15fdb5d0948163b4399ceefac6c
