[INFO] cloning repository https://github.com/sampullman/rust-scheme
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/sampullman/rust-scheme" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsampullman%2Frust-scheme", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsampullman%2Frust-scheme'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f9bd7aa53c119bf21693606a480d7bc76c18badb
[INFO] checking sampullman/rust-scheme against master#1f12b9b0fdbe735968ac002792a720f0ba4faca6 for crater-rollup-uwu
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsampullman%2Frust-scheme" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/sampullman/rust-scheme on toolchain 1f12b9b0fdbe735968ac002792a720f0ba4faca6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/sampullman/rust-scheme
[INFO] finished tweaking git repo https://github.com/sampullman/rust-scheme
[INFO] tweaked toml for git repo https://github.com/sampullman/rust-scheme written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/sampullman/rust-scheme already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2021
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c8ef6d60cf1e4580dee666ffc6bdcca3b66cce31a423ce5aae7027522eccf912
[INFO] running `Command { std: "docker" "start" "-a" "c8ef6d60cf1e4580dee666ffc6bdcca3b66cce31a423ce5aae7027522eccf912", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c8ef6d60cf1e4580dee666ffc6bdcca3b66cce31a423ce5aae7027522eccf912", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c8ef6d60cf1e4580dee666ffc6bdcca3b66cce31a423ce5aae7027522eccf912", kill_on_drop: false }`
[INFO] [stdout] c8ef6d60cf1e4580dee666ffc6bdcca3b66cce31a423ce5aae7027522eccf912
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c1788c56505546b5dab6f9421870f5896fc2d74ac62d9ff378c30e9e49086475
[INFO] running `Command { std: "docker" "start" "-a" "c1788c56505546b5dab6f9421870f5896fc2d74ac62d9ff378c30e9e49086475", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2021
[INFO] [stderr]     Checking rust-scheme v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/environment.rs:60:13
[INFO] [stdout]    |
[INFO] [stdout] 60 |             try!(evaluate(statement.clone(), new_env.clone()));
[INFO] [stdout]    |             ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/builtins.rs:20:20
[INFO] [stdout]    |
[INFO] [stdout] 20 |         let arg1 = try!(args[0].as_int_result());
[INFO] [stdout]    |                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/builtins.rs:21:20
[INFO] [stdout]    |
[INFO] [stdout] 21 |         let arg2 = try!(args[1].as_int_result());
[INFO] [stdout]    |                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/builtins.rs:30:20
[INFO] [stdout]    |
[INFO] [stdout] 30 |         let arg1 = try!(args[0].as_int_result());
[INFO] [stdout]    |                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/builtins.rs:31:20
[INFO] [stdout]    |
[INFO] [stdout] 31 |         let arg2 = try!(args[1].as_int_result());
[INFO] [stdout]    |                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/builtins.rs:40:20
[INFO] [stdout]    |
[INFO] [stdout] 40 |         let arg1 = try!(args[0].as_int_result());
[INFO] [stdout]    |                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/builtins.rs:41:20
[INFO] [stdout]    |
[INFO] [stdout] 41 |         let arg2 = try!(args[1].as_int_result());
[INFO] [stdout]    |                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/builtins.rs:50:20
[INFO] [stdout]    |
[INFO] [stdout] 50 |         let arg1 = try!(args[0].as_int_result());
[INFO] [stdout]    |                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/builtins.rs:51:20
[INFO] [stdout]    |
[INFO] [stdout] 51 |         let arg2 = try!(args[1].as_int_result());
[INFO] [stdout]    |                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/builtins.rs:60:20
[INFO] [stdout]    |
[INFO] [stdout] 60 |         let arg1 = try!(args[0].as_int_result());
[INFO] [stdout]    |                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/builtins.rs:61:20
[INFO] [stdout]    |
[INFO] [stdout] 61 |         let arg2 = try!(args[1].as_int_result());
[INFO] [stdout]    |                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/builtins.rs:70:20
[INFO] [stdout]    |
[INFO] [stdout] 70 |         let arg1 = try!(args[0].as_int_result());
[INFO] [stdout]    |                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/builtins.rs:71:20
[INFO] [stdout]    |
[INFO] [stdout] 71 |         let arg2 = try!(args[1].as_int_result());
[INFO] [stdout]    |                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/builtins.rs:80:20
[INFO] [stdout]    |
[INFO] [stdout] 80 |         let arg1 = try!(args[0].as_int_result());
[INFO] [stdout]    |                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/builtins.rs:81:20
[INFO] [stdout]    |
[INFO] [stdout] 81 |         let arg2 = try!(args[1].as_int_result());
[INFO] [stdout]    |                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/environment.rs:60:13
[INFO] [stdout]    |
[INFO] [stdout] 60 |             try!(evaluate(statement.clone(), new_env.clone()));
[INFO] [stdout]    |             ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/builtins.rs:90:19
[INFO] [stdout]    |
[INFO] [stdout] 90 |         let arg = try!(args[0].as_int_result());
[INFO] [stdout]    |                   ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/builtins.rs:98:23
[INFO] [stdout]    |
[INFO] [stdout] 98 |         let mut lst = try!(arg.as_list_result()).clone();
[INFO] [stdout]    |                       ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/builtins.rs:108:16
[INFO] [stdout]     |
[INFO] [stdout] 108 |     let func = try!(args[0].as_callable_result()).clone();
[INFO] [stdout]     |                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/builtins.rs:110:21
[INFO] [stdout]     |
[INFO] [stdout] 110 |     lst.append(&mut try!(args[args.len()-1].as_list_result()).clone());
[INFO] [stdout]     |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/builtins.rs:20:20
[INFO] [stdout]    |
[INFO] [stdout] 20 |         let arg1 = try!(args[0].as_int_result());
[INFO] [stdout]    |                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/builtins.rs:121:9
[INFO] [stdout]     |
[INFO] [stdout] 121 |         try!(evaluate(arg.clone(), env.clone()));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/interpreter.rs:11:15
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let ast = try!(read_from_tokens(&mut tokens));
[INFO] [stdout]    |               ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/builtins.rs:21:20
[INFO] [stdout]    |
[INFO] [stdout] 21 |         let arg2 = try!(args[1].as_int_result());
[INFO] [stdout]    |                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/interpreter.rs:12:18
[INFO] [stdout]    |
[INFO] [stdout] 12 |     let result = try!(evaluate(ast, env));
[INFO] [stdout]    |                  ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/builtins.rs:30:20
[INFO] [stdout]    |
[INFO] [stdout] 30 |         let arg1 = try!(args[0].as_int_result());
[INFO] [stdout]    |                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/interpreter.rs:26:31
[INFO] [stdout]    |
[INFO] [stdout] 26 |             let first: Atom = try!(list_iter.next().ok_or("Ill-formed expression".to_string()));
[INFO] [stdout]    |                               ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/builtins.rs:31:20
[INFO] [stdout]    |
[INFO] [stdout] 31 |         let arg2 = try!(args[1].as_int_result());
[INFO] [stdout]    |                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/interpreter.rs:27:35
[INFO] [stdout]    |
[INFO] [stdout] 27 |             if let Some(result) = try!(check_special_forms(first.clone(), list_clone, env.clone())) {
[INFO] [stdout]    |                                   ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/builtins.rs:40:20
[INFO] [stdout]    |
[INFO] [stdout] 40 |         let arg1 = try!(args[0].as_int_result());
[INFO] [stdout]    |                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/interpreter.rs:31:28
[INFO] [stdout]    |
[INFO] [stdout] 31 |             let callable = try!(evaluate(first.clone(), env.clone()));
[INFO] [stdout]    |                            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/builtins.rs:41:20
[INFO] [stdout]    |
[INFO] [stdout] 41 |         let arg2 = try!(args[1].as_int_result());
[INFO] [stdout]    |                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/interpreter.rs:35:31
[INFO] [stdout]    |
[INFO] [stdout] 35 |                     args.push(try!(evaluate(arg, env.clone())));
[INFO] [stdout]    |                               ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/interpreter.rs:69:29
[INFO] [stdout]    |
[INFO] [stdout] 69 |             let name_atom = try!(args_iter.next().ok_or("define needs a name".to_string()));
[INFO] [stdout]    |                             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/builtins.rs:50:20
[INFO] [stdout]    |
[INFO] [stdout] 50 |         let arg1 = try!(args[0].as_int_result());
[INFO] [stdout]    |                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/builtins.rs:51:20
[INFO] [stdout]    |
[INFO] [stdout] 51 |         let arg2 = try!(args[1].as_int_result());
[INFO] [stdout]    |                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/interpreter.rs:70:24
[INFO] [stdout]    |
[INFO] [stdout] 70 |             let name = try!(name_atom.as_symbol().ok_or("define name must be a symbol".to_string()));
[INFO] [stdout]    |                        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/builtins.rs:60:20
[INFO] [stdout]    |
[INFO] [stdout] 60 |         let arg1 = try!(args[0].as_int_result());
[INFO] [stdout]    |                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/interpreter.rs:73:32
[INFO] [stdout]    |
[INFO] [stdout] 73 |                 arg_names.push(try!(arg_name_atom.as_symbol().ok_or("Non-symbol in defing arg list")).clone());
[INFO] [stdout]    |                                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/builtins.rs:61:20
[INFO] [stdout]    |
[INFO] [stdout] 61 |         let arg2 = try!(args[1].as_int_result());
[INFO] [stdout]    |                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/interpreter.rs:84:31
[INFO] [stdout]    |
[INFO] [stdout] 84 |     let evaluated_condition = try!(evaluate(condition.clone(), env.clone()));
[INFO] [stdout]    |                               ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/builtins.rs:70:20
[INFO] [stdout]    |
[INFO] [stdout] 70 |         let arg1 = try!(args[0].as_int_result());
[INFO] [stdout]    |                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/interpreter.rs:106:32
[INFO] [stdout]     |
[INFO] [stdout] 106 |                 let arg_list = try!(args_iter.next().ok_or("define takes 2 arguments".to_string()));
[INFO] [stdout]     |                                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/builtins.rs:71:20
[INFO] [stdout]    |
[INFO] [stdout] 71 |         let arg2 = try!(args[1].as_int_result());
[INFO] [stdout]    |                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/interpreter.rs:108:32
[INFO] [stdout]     |
[INFO] [stdout] 108 |                 return Ok(Some(try!(eval_define(env, &arg_list, body))))
[INFO] [stdout]     |                                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/builtins.rs:80:20
[INFO] [stdout]    |
[INFO] [stdout] 80 |         let arg1 = try!(args[0].as_int_result());
[INFO] [stdout]    |                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/interpreter.rs:111:33
[INFO] [stdout]     |
[INFO] [stdout] 111 |                 let condition = try!(args_iter.next().ok_or("if requires at least 2 arguments".to_string()));
[INFO] [stdout]     |                                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/builtins.rs:81:20
[INFO] [stdout]    |
[INFO] [stdout] 81 |         let arg2 = try!(args[1].as_int_result());
[INFO] [stdout]    |                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/builtins.rs:90:19
[INFO] [stdout]    |
[INFO] [stdout] 90 |         let arg = try!(args[0].as_int_result());
[INFO] [stdout]    |                   ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/interpreter.rs:113:32
[INFO] [stdout]     |
[INFO] [stdout] 113 |                 return Ok(Some(try!(eval_if(env, &condition, body))))
[INFO] [stdout]     |                                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/builtins.rs:98:23
[INFO] [stdout]    |
[INFO] [stdout] 98 |         let mut lst = try!(arg.as_list_result()).clone();
[INFO] [stdout]    |                       ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/parse.rs:33:19
[INFO] [stdout]    |
[INFO] [stdout] 33 |         list.push(try!(read_from_tokens(tokens)));
[INFO] [stdout]    |                   ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/parse.rs:51:27
[INFO] [stdout]    |
[INFO] [stdout] 51 |             Ok(Atom::List(try!(read_list(tokens))))
[INFO] [stdout]    |                           ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/builtins.rs:108:16
[INFO] [stdout]     |
[INFO] [stdout] 108 |     let func = try!(args[0].as_callable_result()).clone();
[INFO] [stdout]     |                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/parse.rs:58:28
[INFO] [stdout]    |
[INFO] [stdout] 58 |             let mut list = try!(read_list(tokens));
[INFO] [stdout]    |                            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/builtins.rs:110:21
[INFO] [stdout]     |
[INFO] [stdout] 110 |     lst.append(&mut try!(args[args.len()-1].as_list_result()).clone());
[INFO] [stdout]     |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/builtins.rs:121:9
[INFO] [stdout]     |
[INFO] [stdout] 121 |         try!(evaluate(arg.clone(), env.clone()));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/interpreter.rs:11:15
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let ast = try!(read_from_tokens(&mut tokens));
[INFO] [stdout]    |               ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/interpreter.rs:12:18
[INFO] [stdout]    |
[INFO] [stdout] 12 |     let result = try!(evaluate(ast, env));
[INFO] [stdout]    |                  ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/interpreter.rs:26:31
[INFO] [stdout]    |
[INFO] [stdout] 26 |             let first: Atom = try!(list_iter.next().ok_or("Ill-formed expression".to_string()));
[INFO] [stdout]    |                               ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/interpreter.rs:27:35
[INFO] [stdout]    |
[INFO] [stdout] 27 |             if let Some(result) = try!(check_special_forms(first.clone(), list_clone, env.clone())) {
[INFO] [stdout]    |                                   ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/interpreter.rs:31:28
[INFO] [stdout]    |
[INFO] [stdout] 31 |             let callable = try!(evaluate(first.clone(), env.clone()));
[INFO] [stdout]    |                            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/interpreter.rs:35:31
[INFO] [stdout]    |
[INFO] [stdout] 35 |                     args.push(try!(evaluate(arg, env.clone())));
[INFO] [stdout]    |                               ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/interpreter.rs:69:29
[INFO] [stdout]    |
[INFO] [stdout] 69 |             let name_atom = try!(args_iter.next().ok_or("define needs a name".to_string()));
[INFO] [stdout]    |                             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/interpreter.rs:70:24
[INFO] [stdout]    |
[INFO] [stdout] 70 |             let name = try!(name_atom.as_symbol().ok_or("define name must be a symbol".to_string()));
[INFO] [stdout]    |                        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/interpreter.rs:73:32
[INFO] [stdout]    |
[INFO] [stdout] 73 |                 arg_names.push(try!(arg_name_atom.as_symbol().ok_or("Non-symbol in defing arg list")).clone());
[INFO] [stdout]    |                                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/interpreter.rs:84:31
[INFO] [stdout]    |
[INFO] [stdout] 84 |     let evaluated_condition = try!(evaluate(condition.clone(), env.clone()));
[INFO] [stdout]    |                               ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/interpreter.rs:106:32
[INFO] [stdout]     |
[INFO] [stdout] 106 |                 let arg_list = try!(args_iter.next().ok_or("define takes 2 arguments".to_string()));
[INFO] [stdout]     |                                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/interpreter.rs:108:32
[INFO] [stdout]     |
[INFO] [stdout] 108 |                 return Ok(Some(try!(eval_define(env, &arg_list, body))))
[INFO] [stdout]     |                                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/interpreter.rs:111:33
[INFO] [stdout]     |
[INFO] [stdout] 111 |                 let condition = try!(args_iter.next().ok_or("if requires at least 2 arguments".to_string()));
[INFO] [stdout]     |                                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/interpreter.rs:113:32
[INFO] [stdout]     |
[INFO] [stdout] 113 |                 return Ok(Some(try!(eval_if(env, &condition, body))))
[INFO] [stdout]     |                                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/parse.rs:33:19
[INFO] [stdout]    |
[INFO] [stdout] 33 |         list.push(try!(read_from_tokens(tokens)));
[INFO] [stdout]    |                   ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/parse.rs:51:27
[INFO] [stdout]    |
[INFO] [stdout] 51 |             Ok(Atom::List(try!(read_list(tokens))))
[INFO] [stdout]    |                           ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/parse.rs:58:28
[INFO] [stdout]    |
[INFO] [stdout] 58 |             let mut list = try!(read_list(tokens));
[INFO] [stdout]    |                            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/parse.rs:29:14
[INFO] [stdout]    |
[INFO] [stdout] 29 | fn read_list(mut tokens: &mut Vec<String>) -> Result<Vec<Atom>, String> {
[INFO] [stdout]    |              ----^^^^^^
[INFO] [stdout]    |              |
[INFO] [stdout]    |              help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/parse.rs:43:25
[INFO] [stdout]    |
[INFO] [stdout] 43 | pub fn read_from_tokens(mut tokens: &mut Vec<String>) -> Result<Atom, String> {
[INFO] [stdout]    |                         ----^^^^^^
[INFO] [stdout]    |                         |
[INFO] [stdout]    |                         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/parse.rs:29:14
[INFO] [stdout]    |
[INFO] [stdout] 29 | fn read_list(mut tokens: &mut Vec<String>) -> Result<Vec<Atom>, String> {
[INFO] [stdout]    |              ----^^^^^^
[INFO] [stdout]    |              |
[INFO] [stdout]    |              help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/parse.rs:43:25
[INFO] [stdout]    |
[INFO] [stdout] 43 | pub fn read_from_tokens(mut tokens: &mut Vec<String>) -> Result<Atom, String> {
[INFO] [stdout]    |                         ----^^^^^^
[INFO] [stdout]    |                         |
[INFO] [stdout]    |                         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 39 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 39 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.14s
[INFO] running `Command { std: "docker" "inspect" "c1788c56505546b5dab6f9421870f5896fc2d74ac62d9ff378c30e9e49086475", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c1788c56505546b5dab6f9421870f5896fc2d74ac62d9ff378c30e9e49086475", kill_on_drop: false }`
[INFO] [stdout] c1788c56505546b5dab6f9421870f5896fc2d74ac62d9ff378c30e9e49086475
[INFO] checking sampullman/rust-scheme against try#f9935d29d867449445ee008640ccca1bf1ae0889+rustflags=-Dtail_expr_drop_order for crater-rollup-uwu
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsampullman%2Frust-scheme" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/sampullman/rust-scheme on toolchain f9935d29d867449445ee008640ccca1bf1ae0889
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f9935d29d867449445ee008640ccca1bf1ae0889" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/sampullman/rust-scheme
[INFO] finished tweaking git repo https://github.com/sampullman/rust-scheme
[INFO] tweaked toml for git repo https://github.com/sampullman/rust-scheme written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/sampullman/rust-scheme already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f9935d29d867449445ee008640ccca1bf1ae0889" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2021
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+f9935d29d867449445ee008640ccca1bf1ae0889" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c95625510052104aad2162b3ae88f9eb250e9a9d825311c21bf8d40d03a6f66a
[INFO] running `Command { std: "docker" "start" "-a" "c95625510052104aad2162b3ae88f9eb250e9a9d825311c21bf8d40d03a6f66a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c95625510052104aad2162b3ae88f9eb250e9a9d825311c21bf8d40d03a6f66a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c95625510052104aad2162b3ae88f9eb250e9a9d825311c21bf8d40d03a6f66a", kill_on_drop: false }`
[INFO] [stdout] c95625510052104aad2162b3ae88f9eb250e9a9d825311c21bf8d40d03a6f66a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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 -Dtail_expr_drop_order" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+f9935d29d867449445ee008640ccca1bf1ae0889" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a3ec09f8fbbb33ad34befb75f3eff8752f7c2510fc9de1da8581623d03e9fed0
[INFO] running `Command { std: "docker" "start" "-a" "a3ec09f8fbbb33ad34befb75f3eff8752f7c2510fc9de1da8581623d03e9fed0", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2021
[INFO] [stderr]     Checking rust-scheme v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/environment.rs:60:13
[INFO] [stdout]    |
[INFO] [stdout] 60 |             try!(evaluate(statement.clone(), new_env.clone()));
[INFO] [stdout]    |             ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/builtins.rs:20:20
[INFO] [stdout]    |
[INFO] [stdout] 20 |         let arg1 = try!(args[0].as_int_result());
[INFO] [stdout]    |                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/builtins.rs:21:20
[INFO] [stdout]    |
[INFO] [stdout] 21 |         let arg2 = try!(args[1].as_int_result());
[INFO] [stdout]    |                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/builtins.rs:30:20
[INFO] [stdout]    |
[INFO] [stdout] 30 |         let arg1 = try!(args[0].as_int_result());
[INFO] [stdout]    |                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/builtins.rs:31:20
[INFO] [stdout]    |
[INFO] [stdout] 31 |         let arg2 = try!(args[1].as_int_result());
[INFO] [stdout]    |                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/builtins.rs:40:20
[INFO] [stdout]    |
[INFO] [stdout] 40 |         let arg1 = try!(args[0].as_int_result());
[INFO] [stdout]    |                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/builtins.rs:41:20
[INFO] [stdout]    |
[INFO] [stdout] 41 |         let arg2 = try!(args[1].as_int_result());
[INFO] [stdout]    |                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/builtins.rs:50:20
[INFO] [stdout]    |
[INFO] [stdout] 50 |         let arg1 = try!(args[0].as_int_result());
[INFO] [stdout]    |                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/builtins.rs:51:20
[INFO] [stdout]    |
[INFO] [stdout] 51 |         let arg2 = try!(args[1].as_int_result());
[INFO] [stdout]    |                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/builtins.rs:60:20
[INFO] [stdout]    |
[INFO] [stdout] 60 |         let arg1 = try!(args[0].as_int_result());
[INFO] [stdout]    |                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/builtins.rs:61:20
[INFO] [stdout]    |
[INFO] [stdout] 61 |         let arg2 = try!(args[1].as_int_result());
[INFO] [stdout]    |                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/environment.rs:60:13
[INFO] [stdout]    |
[INFO] [stdout] 60 |             try!(evaluate(statement.clone(), new_env.clone()));
[INFO] [stdout]    |             ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/builtins.rs:70:20
[INFO] [stdout]    |
[INFO] [stdout] 70 |         let arg1 = try!(args[0].as_int_result());
[INFO] [stdout]    |                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/builtins.rs:71:20
[INFO] [stdout]    |
[INFO] [stdout] 71 |         let arg2 = try!(args[1].as_int_result());
[INFO] [stdout]    |                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/builtins.rs:80:20
[INFO] [stdout]    |
[INFO] [stdout] 80 |         let arg1 = try!(args[0].as_int_result());
[INFO] [stdout]    |                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/builtins.rs:81:20
[INFO] [stdout]    |
[INFO] [stdout] 81 |         let arg2 = try!(args[1].as_int_result());
[INFO] [stdout]    |                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/builtins.rs:20:20
[INFO] [stdout]    |
[INFO] [stdout] 20 |         let arg1 = try!(args[0].as_int_result());
[INFO] [stdout]    |                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/builtins.rs:90:19
[INFO] [stdout]    |
[INFO] [stdout] 90 |         let arg = try!(args[0].as_int_result());
[INFO] [stdout]    |                   ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/builtins.rs:98:23
[INFO] [stdout]    |
[INFO] [stdout] 98 |         let mut lst = try!(arg.as_list_result()).clone();
[INFO] [stdout]    |                       ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/builtins.rs:21:20
[INFO] [stdout]    |
[INFO] [stdout] 21 |         let arg2 = try!(args[1].as_int_result());
[INFO] [stdout]    |                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/builtins.rs:108:16
[INFO] [stdout]     |
[INFO] [stdout] 108 |     let func = try!(args[0].as_callable_result()).clone();
[INFO] [stdout]     |                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/builtins.rs:30:20
[INFO] [stdout]    |
[INFO] [stdout] 30 |         let arg1 = try!(args[0].as_int_result());
[INFO] [stdout]    |                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/builtins.rs:110:21
[INFO] [stdout]     |
[INFO] [stdout] 110 |     lst.append(&mut try!(args[args.len()-1].as_list_result()).clone());
[INFO] [stdout]     |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/builtins.rs:31:20
[INFO] [stdout]    |
[INFO] [stdout] 31 |         let arg2 = try!(args[1].as_int_result());
[INFO] [stdout]    |                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/builtins.rs:121:9
[INFO] [stdout]     |
[INFO] [stdout] 121 |         try!(evaluate(arg.clone(), env.clone()));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/builtins.rs:40:20
[INFO] [stdout]    |
[INFO] [stdout] 40 |         let arg1 = try!(args[0].as_int_result());
[INFO] [stdout]    |                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/interpreter.rs:11:15
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let ast = try!(read_from_tokens(&mut tokens));
[INFO] [stdout]    |               ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/builtins.rs:41:20
[INFO] [stdout]    |
[INFO] [stdout] 41 |         let arg2 = try!(args[1].as_int_result());
[INFO] [stdout]    |                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/interpreter.rs:12:18
[INFO] [stdout]    |
[INFO] [stdout] 12 |     let result = try!(evaluate(ast, env));
[INFO] [stdout]    |                  ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/builtins.rs:50:20
[INFO] [stdout]    |
[INFO] [stdout] 50 |         let arg1 = try!(args[0].as_int_result());
[INFO] [stdout]    |                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/interpreter.rs:26:31
[INFO] [stdout]    |
[INFO] [stdout] 26 |             let first: Atom = try!(list_iter.next().ok_or("Ill-formed expression".to_string()));
[INFO] [stdout]    |                               ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/interpreter.rs:27:35
[INFO] [stdout]    |
[INFO] [stdout] 27 |             if let Some(result) = try!(check_special_forms(first.clone(), list_clone, env.clone())) {
[INFO] [stdout]    |                                   ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/builtins.rs:51:20
[INFO] [stdout]    |
[INFO] [stdout] 51 |         let arg2 = try!(args[1].as_int_result());
[INFO] [stdout]    |                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/interpreter.rs:31:28
[INFO] [stdout]    |
[INFO] [stdout] 31 |             let callable = try!(evaluate(first.clone(), env.clone()));
[INFO] [stdout]    |                            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/interpreter.rs:35:31
[INFO] [stdout]    |
[INFO] [stdout] 35 |                     args.push(try!(evaluate(arg, env.clone())));
[INFO] [stdout]    |                               ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/builtins.rs:60:20
[INFO] [stdout]    |
[INFO] [stdout] 60 |         let arg1 = try!(args[0].as_int_result());
[INFO] [stdout]    |                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/builtins.rs:61:20
[INFO] [stdout]    |
[INFO] [stdout] 61 |         let arg2 = try!(args[1].as_int_result());
[INFO] [stdout]    |                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/interpreter.rs:69:29
[INFO] [stdout]    |
[INFO] [stdout] 69 |             let name_atom = try!(args_iter.next().ok_or("define needs a name".to_string()));
[INFO] [stdout]    |                             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/builtins.rs:70:20
[INFO] [stdout]    |
[INFO] [stdout] 70 |         let arg1 = try!(args[0].as_int_result());
[INFO] [stdout]    |                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/interpreter.rs:70:24
[INFO] [stdout]    |
[INFO] [stdout] 70 |             let name = try!(name_atom.as_symbol().ok_or("define name must be a symbol".to_string()));
[INFO] [stdout]    |                        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/builtins.rs:71:20
[INFO] [stdout]    |
[INFO] [stdout] 71 |         let arg2 = try!(args[1].as_int_result());
[INFO] [stdout]    |                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/interpreter.rs:73:32
[INFO] [stdout]    |
[INFO] [stdout] 73 |                 arg_names.push(try!(arg_name_atom.as_symbol().ok_or("Non-symbol in defing arg list")).clone());
[INFO] [stdout]    |                                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/builtins.rs:80:20
[INFO] [stdout]    |
[INFO] [stdout] 80 |         let arg1 = try!(args[0].as_int_result());
[INFO] [stdout]    |                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/interpreter.rs:84:31
[INFO] [stdout]    |
[INFO] [stdout] 84 |     let evaluated_condition = try!(evaluate(condition.clone(), env.clone()));
[INFO] [stdout]    |                               ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/builtins.rs:81:20
[INFO] [stdout]    |
[INFO] [stdout] 81 |         let arg2 = try!(args[1].as_int_result());
[INFO] [stdout]    |                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/interpreter.rs:106:32
[INFO] [stdout]     |
[INFO] [stdout] 106 |                 let arg_list = try!(args_iter.next().ok_or("define takes 2 arguments".to_string()));
[INFO] [stdout]     |                                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/builtins.rs:90:19
[INFO] [stdout]    |
[INFO] [stdout] 90 |         let arg = try!(args[0].as_int_result());
[INFO] [stdout]    |                   ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/interpreter.rs:108:32
[INFO] [stdout]     |
[INFO] [stdout] 108 |                 return Ok(Some(try!(eval_define(env, &arg_list, body))))
[INFO] [stdout]     |                                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/builtins.rs:98:23
[INFO] [stdout]    |
[INFO] [stdout] 98 |         let mut lst = try!(arg.as_list_result()).clone();
[INFO] [stdout]    |                       ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/interpreter.rs:111:33
[INFO] [stdout]     |
[INFO] [stdout] 111 |                 let condition = try!(args_iter.next().ok_or("if requires at least 2 arguments".to_string()));
[INFO] [stdout]     |                                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/builtins.rs:108:16
[INFO] [stdout]     |
[INFO] [stdout] 108 |     let func = try!(args[0].as_callable_result()).clone();
[INFO] [stdout]     |                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/interpreter.rs:113:32
[INFO] [stdout]     |
[INFO] [stdout] 113 |                 return Ok(Some(try!(eval_if(env, &condition, body))))
[INFO] [stdout]     |                                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/builtins.rs:110:21
[INFO] [stdout]     |
[INFO] [stdout] 110 |     lst.append(&mut try!(args[args.len()-1].as_list_result()).clone());
[INFO] [stdout]     |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/parse.rs:33:19
[INFO] [stdout]    |
[INFO] [stdout] 33 |         list.push(try!(read_from_tokens(tokens)));
[INFO] [stdout]    |                   ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/builtins.rs:121:9
[INFO] [stdout]     |
[INFO] [stdout] 121 |         try!(evaluate(arg.clone(), env.clone()));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/parse.rs:51:27
[INFO] [stdout]    |
[INFO] [stdout] 51 |             Ok(Atom::List(try!(read_list(tokens))))
[INFO] [stdout]    |                           ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/interpreter.rs:11:15
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let ast = try!(read_from_tokens(&mut tokens));
[INFO] [stdout]    |               ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/parse.rs:58:28
[INFO] [stdout]    |
[INFO] [stdout] 58 |             let mut list = try!(read_list(tokens));
[INFO] [stdout]    |                            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/interpreter.rs:12:18
[INFO] [stdout]    |
[INFO] [stdout] 12 |     let result = try!(evaluate(ast, env));
[INFO] [stdout]    |                  ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/interpreter.rs:26:31
[INFO] [stdout]    |
[INFO] [stdout] 26 |             let first: Atom = try!(list_iter.next().ok_or("Ill-formed expression".to_string()));
[INFO] [stdout]    |                               ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/interpreter.rs:27:35
[INFO] [stdout]    |
[INFO] [stdout] 27 |             if let Some(result) = try!(check_special_forms(first.clone(), list_clone, env.clone())) {
[INFO] [stdout]    |                                   ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/interpreter.rs:31:28
[INFO] [stdout]    |
[INFO] [stdout] 31 |             let callable = try!(evaluate(first.clone(), env.clone()));
[INFO] [stdout]    |                            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/interpreter.rs:35:31
[INFO] [stdout]    |
[INFO] [stdout] 35 |                     args.push(try!(evaluate(arg, env.clone())));
[INFO] [stdout]    |                               ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/interpreter.rs:69:29
[INFO] [stdout]    |
[INFO] [stdout] 69 |             let name_atom = try!(args_iter.next().ok_or("define needs a name".to_string()));
[INFO] [stdout]    |                             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/interpreter.rs:70:24
[INFO] [stdout]    |
[INFO] [stdout] 70 |             let name = try!(name_atom.as_symbol().ok_or("define name must be a symbol".to_string()));
[INFO] [stdout]    |                        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/interpreter.rs:73:32
[INFO] [stdout]    |
[INFO] [stdout] 73 |                 arg_names.push(try!(arg_name_atom.as_symbol().ok_or("Non-symbol in defing arg list")).clone());
[INFO] [stdout]    |                                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/interpreter.rs:84:31
[INFO] [stdout]    |
[INFO] [stdout] 84 |     let evaluated_condition = try!(evaluate(condition.clone(), env.clone()));
[INFO] [stdout]    |                               ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/interpreter.rs:106:32
[INFO] [stdout]     |
[INFO] [stdout] 106 |                 let arg_list = try!(args_iter.next().ok_or("define takes 2 arguments".to_string()));
[INFO] [stdout]     |                                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/interpreter.rs:108:32
[INFO] [stdout]     |
[INFO] [stdout] 108 |                 return Ok(Some(try!(eval_define(env, &arg_list, body))))
[INFO] [stdout]     |                                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/interpreter.rs:111:33
[INFO] [stdout]     |
[INFO] [stdout] 111 |                 let condition = try!(args_iter.next().ok_or("if requires at least 2 arguments".to_string()));
[INFO] [stdout]     |                                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/interpreter.rs:113:32
[INFO] [stdout]     |
[INFO] [stdout] 113 |                 return Ok(Some(try!(eval_if(env, &condition, body))))
[INFO] [stdout]     |                                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/parse.rs:33:19
[INFO] [stdout]    |
[INFO] [stdout] 33 |         list.push(try!(read_from_tokens(tokens)));
[INFO] [stdout]    |                   ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/parse.rs:51:27
[INFO] [stdout]    |
[INFO] [stdout] 51 |             Ok(Atom::List(try!(read_list(tokens))))
[INFO] [stdout]    |                           ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/parse.rs:58:28
[INFO] [stdout]    |
[INFO] [stdout] 58 |             let mut list = try!(read_list(tokens));
[INFO] [stdout]    |                            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/parse.rs:29:14
[INFO] [stdout]    |
[INFO] [stdout] 29 | fn read_list(mut tokens: &mut Vec<String>) -> Result<Vec<Atom>, String> {
[INFO] [stdout]    |              ----^^^^^^
[INFO] [stdout]    |              |
[INFO] [stdout]    |              help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/parse.rs:29:14
[INFO] [stdout]    |
[INFO] [stdout] 29 | fn read_list(mut tokens: &mut Vec<String>) -> Result<Vec<Atom>, String> {
[INFO] [stdout]    |              ----^^^^^^
[INFO] [stdout]    |              |
[INFO] [stdout]    |              help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/parse.rs:43:25
[INFO] [stdout]    |
[INFO] [stdout] 43 | pub fn read_from_tokens(mut tokens: &mut Vec<String>) -> Result<Atom, String> {
[INFO] [stdout]    |                         ----^^^^^^
[INFO] [stdout]    |                         |
[INFO] [stdout]    |                         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/parse.rs:43:25
[INFO] [stdout]    |
[INFO] [stdout] 43 | pub fn read_from_tokens(mut tokens: &mut Vec<String>) -> Result<Atom, String> {
[INFO] [stdout]    |                         ----^^^^^^
[INFO] [stdout]    |                         |
[INFO] [stdout]    |                         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: these values and local bindings have significant drop implementation that will have a different drop order from that of Edition 2021
[INFO] [stdout]   --> src/environment.rs:62:18
[INFO] [stdout]    |
[INFO] [stdout] 48 |     pub fn evaluate(self, env: Rc<RefCell<Environment>>, args: Vec<Atom>) -> Result<Atom, String> {
[INFO] [stdout]    |                     ----  -----------------------------  --------------- these values have significant drop implementation and will observe changes in drop order under Edition 2024
[INFO] [stdout]    |                     |     |
[INFO] [stdout]    |                     |     these values have significant drop implementation and will observe changes in drop order under Edition 2024
[INFO] [stdout]    |                     these values have significant drop implementation and will observe changes in drop order under Edition 2024
[INFO] [stdout] ...
[INFO] [stdout] 52 |         let new_env = env_spawn_child(env);
[INFO] [stdout]    |             ------- these values have significant drop implementation and will observe changes in drop order under Edition 2024
[INFO] [stdout] ...
[INFO] [stdout] 62 |         evaluate(body_iter.last().unwrap_or(&Atom::Nil).clone(), new_env)
[INFO] [stdout]    |                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this changes meaning in Rust 2024
[INFO] [stdout]    = note: for more information, see issue #123739 <https://github.com/rust-lang/rust/issues/123739>
[INFO] [stdout]    = note: requested on the command line with `-D tail-expr-drop-order`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: these values and local bindings have significant drop implementation that will have a different drop order from that of Edition 2021
[INFO] [stdout]   --> src/environment.rs:62:18
[INFO] [stdout]    |
[INFO] [stdout] 48 |     pub fn evaluate(self, env: Rc<RefCell<Environment>>, args: Vec<Atom>) -> Result<Atom, String> {
[INFO] [stdout]    |                     ----  -----------------------------  --------------- these values have significant drop implementation and will observe changes in drop order under Edition 2024
[INFO] [stdout]    |                     |     |
[INFO] [stdout]    |                     |     these values have significant drop implementation and will observe changes in drop order under Edition 2024
[INFO] [stdout]    |                     these values have significant drop implementation and will observe changes in drop order under Edition 2024
[INFO] [stdout] ...
[INFO] [stdout] 52 |         let new_env = env_spawn_child(env);
[INFO] [stdout]    |             ------- these values have significant drop implementation and will observe changes in drop order under Edition 2024
[INFO] [stdout] ...
[INFO] [stdout] 62 |         evaluate(body_iter.last().unwrap_or(&Atom::Nil).clone(), new_env)
[INFO] [stdout]    |                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this changes meaning in Rust 2024
[INFO] [stdout]    = note: for more information, see issue #123739 <https://github.com/rust-lang/rust/issues/123739>
[INFO] [stdout]    = note: requested on the command line with `-D tail-expr-drop-order`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: these values and local bindings have significant drop implementation that will have a different drop order from that of Edition 2021
[INFO] [stdout]   --> src/environment.rs:78:5
[INFO] [stdout]    |
[INFO] [stdout] 77 | pub fn env_set(env: Rc<RefCell<Environment>>, symbol: String, atom: Atom) {
[INFO] [stdout]    |                -----------------------------                  ---------- these values have significant drop implementation and will observe changes in drop order under Edition 2024
[INFO] [stdout]    |                |
[INFO] [stdout]    |                these values have significant drop implementation and will observe changes in drop order under Edition 2024
[INFO] [stdout] 78 |     env.as_ref().borrow_mut().set_symbol(symbol, atom)
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this changes meaning in Rust 2024
[INFO] [stdout]    = note: for more information, see issue #123739 <https://github.com/rust-lang/rust/issues/123739>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: these values and local bindings have significant drop implementation that will have a different drop order from that of Edition 2021
[INFO] [stdout]   --> src/environment.rs:78:5
[INFO] [stdout]    |
[INFO] [stdout] 77 | pub fn env_set(env: Rc<RefCell<Environment>>, symbol: String, atom: Atom) {
[INFO] [stdout]    |                -----------------------------                  ---------- these values have significant drop implementation and will observe changes in drop order under Edition 2024
[INFO] [stdout]    |                |
[INFO] [stdout]    |                these values have significant drop implementation and will observe changes in drop order under Edition 2024
[INFO] [stdout] 78 |     env.as_ref().borrow_mut().set_symbol(symbol, atom)
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this changes meaning in Rust 2024
[INFO] [stdout]    = note: for more information, see issue #123739 <https://github.com/rust-lang/rust/issues/123739>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: these values and local bindings have significant drop implementation that will have a different drop order from that of Edition 2021
[INFO] [stdout]   --> src/environment.rs:82:13
[INFO] [stdout]    |
[INFO] [stdout] 81 | pub fn env_spawn_child(env: Rc<RefCell<Environment>>) -> Rc<RefCell<Environment>> {
[INFO] [stdout]    |                        ----------------------------- these values have significant drop implementation and will observe changes in drop order under Edition 2024
[INFO] [stdout] 82 |     Rc::new(RefCell::new(Environment { parent: Some(env), definitions: HashMap::new() }))
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this changes meaning in Rust 2024
[INFO] [stdout]    = note: for more information, see issue #123739 <https://github.com/rust-lang/rust/issues/123739>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: these values and local bindings have significant drop implementation that will have a different drop order from that of Edition 2021
[INFO] [stdout]   --> src/environment.rs:82:13
[INFO] [stdout]    |
[INFO] [stdout] 81 | pub fn env_spawn_child(env: Rc<RefCell<Environment>>) -> Rc<RefCell<Environment>> {
[INFO] [stdout]    |                        ----------------------------- these values have significant drop implementation and will observe changes in drop order under Edition 2024
[INFO] [stdout] 82 |     Rc::new(RefCell::new(Environment { parent: Some(env), definitions: HashMap::new() }))
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this changes meaning in Rust 2024
[INFO] [stdout]    = note: for more information, see issue #123739 <https://github.com/rust-lang/rust/issues/123739>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: these values and local bindings have significant drop implementation that will have a different drop order from that of Edition 2021
[INFO] [stdout]    --> src/environment.rs:113:17
[INFO] [stdout]     |
[INFO] [stdout] 91  |         let mut env = Environment::new();
[INFO] [stdout]     |                 --- these values have significant drop implementation and will observe changes in drop order under Edition 2024
[INFO] [stdout] ...
[INFO] [stdout] 113 |         Rc::new(RefCell::new(env))
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this changes meaning in Rust 2024
[INFO] [stdout]     = note: for more information, see issue #123739 <https://github.com/rust-lang/rust/issues/123739>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: these values and local bindings have significant drop implementation that will have a different drop order from that of Edition 2021
[INFO] [stdout]    --> src/environment.rs:113:17
[INFO] [stdout]     |
[INFO] [stdout] 91  |         let mut env = Environment::new();
[INFO] [stdout]     |                 --- these values have significant drop implementation and will observe changes in drop order under Edition 2024
[INFO] [stdout] ...
[INFO] [stdout] 113 |         Rc::new(RefCell::new(env))
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this changes meaning in Rust 2024
[INFO] [stdout]     = note: for more information, see issue #123739 <https://github.com/rust-lang/rust/issues/123739>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: these values and local bindings have significant drop implementation that will have a different drop order from that of Edition 2021
[INFO] [stdout]    --> src/builtins.rs:130:11
[INFO] [stdout]     |
[INFO] [stdout] 126 | pub fn scheme_car(env: Rc<RefCell<Environment>>, args: Vec<Atom>) -> Result<Atom, String> {
[INFO] [stdout]     |                   -----------------------------  --------------- these values have significant drop implementation and will observe changes in drop order under Edition 2024
[INFO] [stdout]     |                   |
[INFO] [stdout]     |                   these values have significant drop implementation and will observe changes in drop order under Edition 2024
[INFO] [stdout] ...
[INFO] [stdout] 130 |     match args[0].clone() {
[INFO] [stdout]     |           ^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this changes meaning in Rust 2024
[INFO] [stdout]     = note: for more information, see issue #123739 <https://github.com/rust-lang/rust/issues/123739>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: these values and local bindings have significant drop implementation that will have a different drop order from that of Edition 2021
[INFO] [stdout]    --> src/builtins.rs:130:11
[INFO] [stdout]     |
[INFO] [stdout] 126 | pub fn scheme_car(env: Rc<RefCell<Environment>>, args: Vec<Atom>) -> Result<Atom, String> {
[INFO] [stdout]     |                   -----------------------------  --------------- these values have significant drop implementation and will observe changes in drop order under Edition 2024
[INFO] [stdout]     |                   |
[INFO] [stdout]     |                   these values have significant drop implementation and will observe changes in drop order under Edition 2024
[INFO] [stdout] ...
[INFO] [stdout] 130 |     match args[0].clone() {
[INFO] [stdout]     |           ^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this changes meaning in Rust 2024
[INFO] [stdout]     = note: for more information, see issue #123739 <https://github.com/rust-lang/rust/issues/123739>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: these values and local bindings have significant drop implementation that will have a different drop order from that of Edition 2021
[INFO] [stdout]    --> src/builtins.rs:147:11
[INFO] [stdout]     |
[INFO] [stdout] 143 | pub fn scheme_cdr(env: Rc<RefCell<Environment>>, args: Vec<Atom>) -> Result<Atom, String> {
[INFO] [stdout]     |                   -----------------------------  --------------- these values have significant drop implementation and will observe changes in drop order under Edition 2024
[INFO] [stdout]     |                   |
[INFO] [stdout]     |                   these values have significant drop implementation and will observe changes in drop order under Edition 2024
[INFO] [stdout] ...
[INFO] [stdout] 147 |     match args[0].clone() {
[INFO] [stdout]     |           ^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this changes meaning in Rust 2024
[INFO] [stdout]     = note: for more information, see issue #123739 <https://github.com/rust-lang/rust/issues/123739>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: these values and local bindings have significant drop implementation that will have a different drop order from that of Edition 2021
[INFO] [stdout]    --> src/builtins.rs:190:8
[INFO] [stdout]     |
[INFO] [stdout] 189 | pub fn scheme_list(env: Rc<RefCell<Environment>>, args: Vec<Atom>) -> Result<Atom, String> {
[INFO] [stdout]     |                    -----------------------------  --------------- these values have significant drop implementation and will observe changes in drop order under Edition 2024
[INFO] [stdout]     |                    |
[INFO] [stdout]     |                    these values have significant drop implementation and will observe changes in drop order under Edition 2024
[INFO] [stdout] 190 |     Ok(Atom::List(args))
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this changes meaning in Rust 2024
[INFO] [stdout]     = note: for more information, see issue #123739 <https://github.com/rust-lang/rust/issues/123739>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: these values and local bindings have significant drop implementation that will have a different drop order from that of Edition 2021
[INFO] [stdout]    --> src/builtins.rs:147:11
[INFO] [stdout]     |
[INFO] [stdout] 143 | pub fn scheme_cdr(env: Rc<RefCell<Environment>>, args: Vec<Atom>) -> Result<Atom, String> {
[INFO] [stdout]     |                   -----------------------------  --------------- these values have significant drop implementation and will observe changes in drop order under Edition 2024
[INFO] [stdout]     |                   |
[INFO] [stdout]     |                   these values have significant drop implementation and will observe changes in drop order under Edition 2024
[INFO] [stdout] ...
[INFO] [stdout] 147 |     match args[0].clone() {
[INFO] [stdout]     |           ^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this changes meaning in Rust 2024
[INFO] [stdout]     = note: for more information, see issue #123739 <https://github.com/rust-lang/rust/issues/123739>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: these values and local bindings have significant drop implementation that will have a different drop order from that of Edition 2021
[INFO] [stdout]    --> src/builtins.rs:190:8
[INFO] [stdout]     |
[INFO] [stdout] 189 | pub fn scheme_list(env: Rc<RefCell<Environment>>, args: Vec<Atom>) -> Result<Atom, String> {
[INFO] [stdout]     |                    -----------------------------  --------------- these values have significant drop implementation and will observe changes in drop order under Edition 2024
[INFO] [stdout]     |                    |
[INFO] [stdout]     |                    these values have significant drop implementation and will observe changes in drop order under Edition 2024
[INFO] [stdout] 190 |     Ok(Atom::List(args))
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this changes meaning in Rust 2024
[INFO] [stdout]     = note: for more information, see issue #123739 <https://github.com/rust-lang/rust/issues/123739>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: these values and local bindings have significant drop implementation that will have a different drop order from that of Edition 2021
[INFO] [stdout]   --> src/interpreter.rs:54:11
[INFO] [stdout]    |
[INFO] [stdout] 53 | fn eval_define(env: Rc<RefCell<Environment>>, arg_list: &Atom, body: Vec<Atom>) -> Result<Atom, String> {
[INFO] [stdout]    |                -----------------------------                   --------------- these values have significant drop implementation and will observe changes in drop order under Edition 2024
[INFO] [stdout]    |                |
[INFO] [stdout]    |                these values have significant drop implementation and will observe changes in drop order under Edition 2024
[INFO] [stdout] 54 |     match arg_list.clone() {
[INFO] [stdout]    |           ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this changes meaning in Rust 2024
[INFO] [stdout]    = note: for more information, see issue #123739 <https://github.com/rust-lang/rust/issues/123739>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: these values and local bindings have significant drop implementation that will have a different drop order from that of Edition 2021
[INFO] [stdout]   --> src/interpreter.rs:54:11
[INFO] [stdout]    |
[INFO] [stdout] 53 | fn eval_define(env: Rc<RefCell<Environment>>, arg_list: &Atom, body: Vec<Atom>) -> Result<Atom, String> {
[INFO] [stdout]    |                -----------------------------                   --------------- these values have significant drop implementation and will observe changes in drop order under Edition 2024
[INFO] [stdout]    |                |
[INFO] [stdout]    |                these values have significant drop implementation and will observe changes in drop order under Edition 2024
[INFO] [stdout] 54 |     match arg_list.clone() {
[INFO] [stdout]    |           ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this changes meaning in Rust 2024
[INFO] [stdout]    = note: for more information, see issue #123739 <https://github.com/rust-lang/rust/issues/123739>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 8 previous errors; 39 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 8 previous errors; 39 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rust-scheme` (lib) due to 9 previous errors; 39 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `rust-scheme` (lib test) due to 9 previous errors; 39 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "a3ec09f8fbbb33ad34befb75f3eff8752f7c2510fc9de1da8581623d03e9fed0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a3ec09f8fbbb33ad34befb75f3eff8752f7c2510fc9de1da8581623d03e9fed0", kill_on_drop: false }`
[INFO] [stdout] a3ec09f8fbbb33ad34befb75f3eff8752f7c2510fc9de1da8581623d03e9fed0