[INFO] cloning repository https://github.com/LocalToasty/toastylisp
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/LocalToasty/toastylisp" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLocalToasty%2Ftoastylisp", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLocalToasty%2Ftoastylisp'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c5eba6ae87f64105eb9f36617f144d4e00fa4394
[INFO] checking LocalToasty/toastylisp against master#5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f for pr-87248
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLocalToasty%2Ftoastylisp" "/workspace/builds/worker-12/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-12/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/LocalToasty/toastylisp on toolchain 5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/LocalToasty/toastylisp
[INFO] finished tweaking git repo https://github.com/LocalToasty/toastylisp
[INFO] tweaked toml for git repo https://github.com/LocalToasty/toastylisp written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate git repo https://github.com/LocalToasty/toastylisp already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] aa37671cb6f527f474f6f44489c4249db4381ddd1711a6543a8003dd619a73c3
[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" "aa37671cb6f527f474f6f44489c4249db4381ddd1711a6543a8003dd619a73c3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "aa37671cb6f527f474f6f44489c4249db4381ddd1711a6543a8003dd619a73c3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aa37671cb6f527f474f6f44489c4249db4381ddd1711a6543a8003dd619a73c3", kill_on_drop: false }`
[INFO] [stdout] aa37671cb6f527f474f6f44489c4249db4381ddd1711a6543a8003dd619a73c3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "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] 79eabdb12be1944faf92739440a7d0ca759dbd8d0e48dfb6f7f6b6c2a0bc29e3
[INFO] running `Command { std: "docker" "start" "-a" "79eabdb12be1944faf92739440a7d0ca759dbd8d0e48dfb6f7f6b6c2a0bc29e3", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking toastylisp v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]   --> src/parser.rs:25:1
[INFO] [stdout]    |
[INFO] [stdout] 25 | /// Recognizes the end of an expression, without affecting the parser.
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ rustdoc does not generate documentation for macro invocations
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stdout]    = help: to document an item produced by a macro, the macro must produce the documentation as part of its expansion
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/parser.rs:178:1
[INFO] [stdout]     |
[INFO] [stdout] 178 | / /// Parses an identifier.
[INFO] [stdout] 179 | | ///
[INFO] [stdout] 180 | | /// An identifier consists of one or more characters which are not whitespace, '(', ')', or ''' .
[INFO] [stdout] 181 | | /// The first character furthermore must not be a numeric one.
[INFO] [stdout]     | |_-------------------------------------------------------------^
[INFO] [stdout]     |   |
[INFO] [stdout]     |   rustdoc does not generate documentation for macro invocations
[INFO] [stdout]     |
[INFO] [stdout]     = help: to document an item produced by a macro, the macro must produce the documentation as part of its expansion
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `#[macro_use]` import
[INFO] [stdout]  --> src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #[macro_use]
[INFO] [stdout]   | ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/expression/mod.rs:150:17
[INFO] [stdout]     |
[INFO] [stdout] 150 |                 try!(write!(f, "({}", head));
[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/expression/mod.rs:154:21
[INFO] [stdout]     |
[INFO] [stdout] 154 |                     try!(write!(f, " {}", head));
[INFO] [stdout]     |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/expression/mod.rs:168:17
[INFO] [stdout]     |
[INFO] [stdout] 168 |                 try!(write!(f, "(cond"));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/expression/mod.rs:171:21
[INFO] [stdout]     |
[INFO] [stdout] 171 |                     try!(write!(f, " ({} {})", pred, cons));
[INFO] [stdout]     |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/expression/mod.rs:179:17
[INFO] [stdout]     |
[INFO] [stdout] 179 |                 try!(write!(f, "(lambda ("));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/expression/mod.rs:181:21
[INFO] [stdout]     |
[INFO] [stdout] 181 |                     try!(write!(f, "{}", lambda.params[0]));
[INFO] [stdout]     |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/expression/mod.rs:183:25
[INFO] [stdout]     |
[INFO] [stdout] 183 |                         try!(write!(f, " {}", param));
[INFO] [stdout]     |                         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/expression/mod.rs:187:21
[INFO] [stdout]     |
[INFO] [stdout] 187 |                     try!(write!(f, "..."));
[INFO] [stdout]     |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/expression/mod.rs:195:17
[INFO] [stdout]     |
[INFO] [stdout] 195 |                 try!(write!(f, "(let ("));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/expression/mod.rs:197:21
[INFO] [stdout]     |
[INFO] [stdout] 197 |                     try!(write!(f, "({} {})", def.0, def.1));
[INFO] [stdout]     |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/expression/mod.rs:202:17
[INFO] [stdout]     |
[INFO] [stdout] 202 |                 try!(write!(f, "(seqence"));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/expression/mod.rs:204:21
[INFO] [stdout]     |
[INFO] [stdout] 204 |                     try!(write!(f, " {}", expr));
[INFO] [stdout]     |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/expression/mod.rs:297:17
[INFO] [stdout]     |
[INFO] [stdout] 297 |                 try!(write!(f, "Logic error:"));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/expression/mod.rs:299:21
[INFO] [stdout]     |
[INFO] [stdout] 299 |                     try!(write!(f, " {}", msg));
[INFO] [stdout]     |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/expression/mod.rs:562:19
[INFO] [stdout]     |
[INFO] [stdout] 562 |         let res = try!(eval(expr, &env));
[INFO] [stdout]     |                   ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/builtin.rs:205:20
[INFO] [stdout]     |
[INFO] [stdout] 205 |             match *try!(arg) {
[INFO] [stdout]     |                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/builtin.rs:254:24
[INFO] [stdout]     |
[INFO] [stdout] 254 |             let curr = try!(arg);
[INFO] [stdout]     |                        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/builtin.rs:286:20
[INFO] [stdout]     |
[INFO] [stdout] 286 |             match *try!(arg) {
[INFO] [stdout]     |                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/builtin.rs:325:20
[INFO] [stdout]     |
[INFO] [stdout] 325 |             match *try!(arg) {
[INFO] [stdout]     |                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/builtin.rs:413:26
[INFO] [stdout]     |
[INFO] [stdout] 413 |             print!("{}", try!(arg));
[INFO] [stdout]     |                          ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]   --> src/parser.rs:25:1
[INFO] [stdout]    |
[INFO] [stdout] 25 | /// Recognizes the end of an expression, without affecting the parser.
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ rustdoc does not generate documentation for macro invocations
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stdout]    = help: to document an item produced by a macro, the macro must produce the documentation as part of its expansion
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/parser.rs:178:1
[INFO] [stdout]     |
[INFO] [stdout] 178 | / /// Parses an identifier.
[INFO] [stdout] 179 | | ///
[INFO] [stdout] 180 | | /// An identifier consists of one or more characters which are not whitespace, '(', ')', or ''' .
[INFO] [stdout] 181 | | /// The first character furthermore must not be a numeric one.
[INFO] [stdout]     | |_-------------------------------------------------------------^
[INFO] [stdout]     |   |
[INFO] [stdout]     |   rustdoc does not generate documentation for macro invocations
[INFO] [stdout]     |
[INFO] [stdout]     = help: to document an item produced by a macro, the macro must produce the documentation as part of its expansion
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `#[macro_use]` import
[INFO] [stdout]  --> src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #[macro_use]
[INFO] [stdout]   | ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/expression/mod.rs:150:17
[INFO] [stdout]     |
[INFO] [stdout] 150 |                 try!(write!(f, "({}", head));
[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/expression/mod.rs:154:21
[INFO] [stdout]     |
[INFO] [stdout] 154 |                     try!(write!(f, " {}", head));
[INFO] [stdout]     |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/expression/mod.rs:168:17
[INFO] [stdout]     |
[INFO] [stdout] 168 |                 try!(write!(f, "(cond"));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/expression/mod.rs:171:21
[INFO] [stdout]     |
[INFO] [stdout] 171 |                     try!(write!(f, " ({} {})", pred, cons));
[INFO] [stdout]     |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/expression/mod.rs:179:17
[INFO] [stdout]     |
[INFO] [stdout] 179 |                 try!(write!(f, "(lambda ("));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/expression/mod.rs:181:21
[INFO] [stdout]     |
[INFO] [stdout] 181 |                     try!(write!(f, "{}", lambda.params[0]));
[INFO] [stdout]     |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/expression/mod.rs:183:25
[INFO] [stdout]     |
[INFO] [stdout] 183 |                         try!(write!(f, " {}", param));
[INFO] [stdout]     |                         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/expression/mod.rs:187:21
[INFO] [stdout]     |
[INFO] [stdout] 187 |                     try!(write!(f, "..."));
[INFO] [stdout]     |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/expression/mod.rs:195:17
[INFO] [stdout]     |
[INFO] [stdout] 195 |                 try!(write!(f, "(let ("));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/expression/mod.rs:197:21
[INFO] [stdout]     |
[INFO] [stdout] 197 |                     try!(write!(f, "({} {})", def.0, def.1));
[INFO] [stdout]     |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/expression/mod.rs:202:17
[INFO] [stdout]     |
[INFO] [stdout] 202 |                 try!(write!(f, "(seqence"));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/expression/mod.rs:204:21
[INFO] [stdout]     |
[INFO] [stdout] 204 |                     try!(write!(f, " {}", expr));
[INFO] [stdout]     |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/expression/mod.rs:297:17
[INFO] [stdout]     |
[INFO] [stdout] 297 |                 try!(write!(f, "Logic error:"));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/expression/mod.rs:299:21
[INFO] [stdout]     |
[INFO] [stdout] 299 |                     try!(write!(f, " {}", msg));
[INFO] [stdout]     |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/expression/mod.rs:562:19
[INFO] [stdout]     |
[INFO] [stdout] 562 |         let res = try!(eval(expr, &env));
[INFO] [stdout]     |                   ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/builtin.rs:205:20
[INFO] [stdout]     |
[INFO] [stdout] 205 |             match *try!(arg) {
[INFO] [stdout]     |                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/builtin.rs:254:24
[INFO] [stdout]     |
[INFO] [stdout] 254 |             let curr = try!(arg);
[INFO] [stdout]     |                        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/builtin.rs:286:20
[INFO] [stdout]     |
[INFO] [stdout] 286 |             match *try!(arg) {
[INFO] [stdout]     |                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/builtin.rs:325:20
[INFO] [stdout]     |
[INFO] [stdout] 325 |             match *try!(arg) {
[INFO] [stdout]     |                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/builtin.rs:413:26
[INFO] [stdout]     |
[INFO] [stdout] 413 |             print!("{}", try!(arg));
[INFO] [stdout]     |                          ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: static variable `verbose` should have an upper case name
[INFO] [stdout]    --> src/expression/mod.rs:327:12
[INFO] [stdout]     |
[INFO] [stdout] 327 | static mut verbose: Option<usize> = None;
[INFO] [stdout]     |            ^^^^^^^ help: convert the identifier to upper case: `VERBOSE`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_upper_case_globals)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 24 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: static variable `verbose` should have an upper case name
[INFO] [stdout]    --> src/expression/mod.rs:327:12
[INFO] [stdout]     |
[INFO] [stdout] 327 | static mut verbose: Option<usize> = None;
[INFO] [stdout]     |            ^^^^^^^ help: convert the identifier to upper case: `VERBOSE`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_upper_case_globals)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 24 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.16s
[INFO] running `Command { std: "docker" "inspect" "79eabdb12be1944faf92739440a7d0ca759dbd8d0e48dfb6f7f6b6c2a0bc29e3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "79eabdb12be1944faf92739440a7d0ca759dbd8d0e48dfb6f7f6b6c2a0bc29e3", kill_on_drop: false }`
[INFO] [stdout] 79eabdb12be1944faf92739440a7d0ca759dbd8d0e48dfb6f7f6b6c2a0bc29e3