[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 try#8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8 for pr-82565
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsampullman%2Frust-scheme" "/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/sampullman/rust-scheme on toolchain 8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8" "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-8/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: "/workspace/cargo-home/bin/cargo" "+8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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" "rustops/crates-build-env@sha256:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2a9f1169a242fd1ce518c96d4849208fdd832ac499198fdd7678fda2ad34da89
[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" "2a9f1169a242fd1ce518c96d4849208fdd832ac499198fdd7678fda2ad34da89", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2a9f1169a242fd1ce518c96d4849208fdd832ac499198fdd7678fda2ad34da89", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2a9f1169a242fd1ce518c96d4849208fdd832ac499198fdd7678fda2ad34da89", kill_on_drop: false }`
[INFO] [stdout] 2a9f1169a242fd1ce518c96d4849208fdd832ac499198fdd7678fda2ad34da89
[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" "rustops/crates-build-env@sha256:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8" "check" "--frozen" "--all" "--all-targets" "--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] fa99bf407f1cf8fdfb73e03748544970aef005d22cf4edb7c2b3eb48f32e0081
[INFO] running `Command { std: "docker" "start" "-a" "fa99bf407f1cf8fdfb73e03748544970aef005d22cf4edb7c2b3eb48f32e0081", kill_on_drop: false }`
[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/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: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: 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/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: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: 39 warnings emitted
[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] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.16s
[INFO] running `Command { std: "docker" "inspect" "fa99bf407f1cf8fdfb73e03748544970aef005d22cf4edb7c2b3eb48f32e0081", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fa99bf407f1cf8fdfb73e03748544970aef005d22cf4edb7c2b3eb48f32e0081", kill_on_drop: false }`
[INFO] [stdout] fa99bf407f1cf8fdfb73e03748544970aef005d22cf4edb7c2b3eb48f32e0081