[INFO] fetching crate little 0.3.0...
[INFO] checking little-0.3.0 against master#2748a9fd93dd1a00a4521f4f16de5befbf77f6cd for pr-62262-1
[INFO] extracting crate little 0.3.0 into /workspace/builds/worker-10/source
[INFO] validating manifest of crates.io crate little 0.3.0 on toolchain 2748a9fd93dd1a00a4521f4f16de5befbf77f6cd
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate little 0.3.0
[INFO] finished tweaking crates.io crate little 0.3.0
[INFO] tweaked toml for crates.io crate little 0.3.0 written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 1b0df51c92b888a367223a3d48c2bc230f580b9c5511010d9489adafc6733c29
[INFO] running `"docker" "start" "-a" "1b0df51c92b888a367223a3d48c2bc230f580b9c5511010d9489adafc6733c29"`
[INFO] [stderr]     Checking byteorder v0.4.2
[INFO] [stderr]     Checking little v0.3.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/interpreter.rs:134:25
[INFO] [stderr]     |
[INFO] [stderr] 134 |                         try!(write!(self.buf, "{}", try!(self.values.get_mem_value(location))))
[INFO] [stderr]     |                         ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/interpreter.rs:134:53
[INFO] [stderr]     |
[INFO] [stderr] 134 |                         try!(write!(self.buf, "{}", try!(self.values.get_mem_value(location))))
[INFO] [stderr]     |                                                     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/interpreter.rs:146:37
[INFO] [stderr]     |
[INFO] [stderr] 146 |                         let value = try!(self.values.get_mem_value(location)).into_owned();
[INFO] [stderr]     |                                     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/interpreter.rs:150:37
[INFO] [stderr]     |
[INFO] [stderr] 150 |                         let value = try!(self.values.get_mem_value(location)).into_owned();
[INFO] [stderr]     |                                     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/interpreter.rs:158:37
[INFO] [stderr]     |
[INFO] [stderr] 158 |                         let value = try!(self.values.get_mem_value(location));
[INFO] [stderr]     |                                     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/stream.rs:33:9
[INFO] [stderr]    |
[INFO] [stderr] 33 |         try!(writer.write_all(&buf[..len]));
[INFO] [stderr]    |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/stream.rs:59:5
[INFO] [stderr]    |
[INFO] [stderr] 59 |     try!(input.seek(SeekFrom::Start(loc)));
[INFO] [stderr]    |     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/bytecode.rs:72:9
[INFO] [stderr]    |
[INFO] [stderr] 72 |         try!(output.write_u32::<LittleEndian>(self.magic));
[INFO] [stderr]    |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/bytecode.rs:78:20
[INFO] [stderr]    |
[INFO] [stderr] 78 |             magic: try!(input.read_u32::<LittleEndian>())
[INFO] [stderr]    |                    ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/error/little.rs:20:19
[INFO] [stderr]    |
[INFO] [stderr] 20 |     CallError(Box<error::Error + Sync + Send>),
[INFO] [stderr]    |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn error::Error + Sync + Send`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/error/little.rs:74:42
[INFO] [stderr]    |
[INFO] [stderr] 74 | pub type LittleResult<V> = Result<V, Box<error::Error>>;
[INFO] [stderr]    |                                          ^^^^^^^^^^^^ help: use `dyn`: `dyn error::Error`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/interpreter.rs:50:42
[INFO] [stderr]    |
[INFO] [stderr] 50 |         calls: &'a HashMap<&'a str, &'a (Function<V> + 'a)>
[INFO] [stderr]    |                                          ^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Function<V> + 'a`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/interpreter.rs:64:75
[INFO] [stderr]    |
[INFO] [stderr] 64 |     fn load(&'a mut self, id: &str, env: Fingerprint, calls: &'a Vec<&'a (Function<V> + 'a)>)
[INFO] [stderr]    |                                                                           ^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Function<V> + 'a`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/interpreter.rs:75:30
[INFO] [stderr]    |
[INFO] [stderr] 75 |     calls: Options<Call, &'a Function<V>>,
[INFO] [stderr]    |                              ^^^^^^^^^^^ help: use `dyn`: `dyn Function<V>`
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `BuildError`
[INFO] [stderr]  --> src/compiler.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 |     BuildError,
[INFO] [stderr]   |     ^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/compiler.rs:30:42
[INFO] [stderr]    |
[INFO] [stderr] 30 |         calls: &'a HashMap<&'a str, &'a (Function<V> + 'a)>
[INFO] [stderr]    |                                          ^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Function<V> + 'a`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/compiler.rs:36:75
[INFO] [stderr]    |
[INFO] [stderr] 36 |     fn load(&'a mut self, id: &str, env: Fingerprint, calls: &'a Vec<&'a (Function<V> + 'a)>)
[INFO] [stderr]    |                                                                           ^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Function<V> + 'a`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/lib.rs:145:42
[INFO] [stderr]     |
[INFO] [stderr] 145 |         calls: &'a HashMap<&'a str, &'a (Function<V> + 'a)>
[INFO] [stderr]     |                                          ^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Function<V> + 'a`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/lib.rs:149:75
[INFO] [stderr]     |
[INFO] [stderr] 149 |     fn load(&'a mut self, id: &str, env: Fingerprint, calls: &'a Vec<&'a (Function<V> + 'a)>)
[INFO] [stderr]     |                                                                           ^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Function<V> + 'a`
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/interpreter.rs:134:25
[INFO] [stderr]     |
[INFO] [stderr] 134 |                         try!(write!(self.buf, "{}", try!(self.values.get_mem_value(location))))
[INFO] [stderr]     |                         ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/interpreter.rs:134:53
[INFO] [stderr]     |
[INFO] [stderr] 134 |                         try!(write!(self.buf, "{}", try!(self.values.get_mem_value(location))))
[INFO] [stderr]     |                                                     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/interpreter.rs:146:37
[INFO] [stderr]     |
[INFO] [stderr] 146 |                         let value = try!(self.values.get_mem_value(location)).into_owned();
[INFO] [stderr]     |                                     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/interpreter.rs:150:37
[INFO] [stderr]     |
[INFO] [stderr] 150 |                         let value = try!(self.values.get_mem_value(location)).into_owned();
[INFO] [stderr]     |                                     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/interpreter.rs:158:37
[INFO] [stderr]     |
[INFO] [stderr] 158 |                         let value = try!(self.values.get_mem_value(location));
[INFO] [stderr]     |                                     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/stream.rs:33:9
[INFO] [stderr]    |
[INFO] [stderr] 33 |         try!(writer.write_all(&buf[..len]));
[INFO] [stderr]    |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/stream.rs:59:5
[INFO] [stderr]    |
[INFO] [stderr] 59 |     try!(input.seek(SeekFrom::Start(loc)));
[INFO] [stderr]    |     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/bytecode.rs:72:9
[INFO] [stderr]    |
[INFO] [stderr] 72 |         try!(output.write_u32::<LittleEndian>(self.magic));
[INFO] [stderr]    |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/bytecode.rs:78:20
[INFO] [stderr]    |
[INFO] [stderr] 78 |             magic: try!(input.read_u32::<LittleEndian>())
[INFO] [stderr]    |                    ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/error/little.rs:20:19
[INFO] [stderr]    |
[INFO] [stderr] 20 |     CallError(Box<error::Error + Sync + Send>),
[INFO] [stderr]    |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn error::Error + Sync + Send`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/error/little.rs:74:42
[INFO] [stderr]    |
[INFO] [stderr] 74 | pub type LittleResult<V> = Result<V, Box<error::Error>>;
[INFO] [stderr]    |                                          ^^^^^^^^^^^^ help: use `dyn`: `dyn error::Error`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/interpreter.rs:50:42
[INFO] [stderr]    |
[INFO] [stderr] 50 |         calls: &'a HashMap<&'a str, &'a (Function<V> + 'a)>
[INFO] [stderr]    |                                          ^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Function<V> + 'a`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/interpreter.rs:64:75
[INFO] [stderr]    |
[INFO] [stderr] 64 |     fn load(&'a mut self, id: &str, env: Fingerprint, calls: &'a Vec<&'a (Function<V> + 'a)>)
[INFO] [stderr]    |                                                                           ^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Function<V> + 'a`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/interpreter.rs:75:30
[INFO] [stderr]    |
[INFO] [stderr] 75 |     calls: Options<Call, &'a Function<V>>,
[INFO] [stderr]    |                              ^^^^^^^^^^^ help: use `dyn`: `dyn Function<V>`
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `BuildError`
[INFO] [stderr]  --> src/compiler.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 |     BuildError,
[INFO] [stderr]   |     ^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/compiler.rs:30:42
[INFO] [stderr]    |
[INFO] [stderr] 30 |         calls: &'a HashMap<&'a str, &'a (Function<V> + 'a)>
[INFO] [stderr]    |                                          ^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Function<V> + 'a`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/compiler.rs:36:75
[INFO] [stderr]    |
[INFO] [stderr] 36 |     fn load(&'a mut self, id: &str, env: Fingerprint, calls: &'a Vec<&'a (Function<V> + 'a)>)
[INFO] [stderr]    |                                                                           ^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Function<V> + 'a`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/lib.rs:145:42
[INFO] [stderr]     |
[INFO] [stderr] 145 |         calls: &'a HashMap<&'a str, &'a (Function<V> + 'a)>
[INFO] [stderr]     |                                          ^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Function<V> + 'a`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/lib.rs:149:75
[INFO] [stderr]     |
[INFO] [stderr] 149 |     fn load(&'a mut self, id: &str, env: Fingerprint, calls: &'a Vec<&'a (Function<V> + 'a)>)
[INFO] [stderr]     |                                                                           ^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Function<V> + 'a`
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Write`
[INFO] [stderr]   --> src/lib.rs:14:22
[INFO] [stderr]    |
[INFO] [stderr] 14 | use std::io::{ self, Write };
[INFO] [stderr]    |                      ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Read`
[INFO] [stderr]  --> src/interpreter.rs:4:16
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::io::{ Read, Write };
[INFO] [stderr]   |                ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `id`
[INFO] [stderr]   --> src/interpreter.rs:64:27
[INFO] [stderr]    |
[INFO] [stderr] 64 |     fn load(&'a mut self, id: &str, env: Fingerprint, calls: &'a Vec<&'a (Function<V> + 'a)>)
[INFO] [stderr]    |                           ^^ help: consider prefixing with an underscore: `_id`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `env`
[INFO] [stderr]   --> src/interpreter.rs:64:37
[INFO] [stderr]    |
[INFO] [stderr] 64 |     fn load(&'a mut self, id: &str, env: Fingerprint, calls: &'a Vec<&'a (Function<V> + 'a)>)
[INFO] [stderr]    |                                     ^^^ help: consider prefixing with an underscore: `_env`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `calls`
[INFO] [stderr]   --> src/interpreter.rs:64:55
[INFO] [stderr]    |
[INFO] [stderr] 64 |     fn load(&'a mut self, id: &str, env: Fingerprint, calls: &'a Vec<&'a (Function<V> + 'a)>)
[INFO] [stderr]    |                                                       ^^^^^ help: consider prefixing with an underscore: `_calls`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `name`
[INFO] [stderr]    --> src/interpreter.rs:136:49
[INFO] [stderr]     |
[INFO] [stderr] 136 |                     Instruction::Property { mut name } => {
[INFO] [stderr]     |                                             ----^^^^
[INFO] [stderr]     |                                             |
[INFO] [stderr]     |                                             help: try ignoring the field: `name: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `name`
[INFO] [stderr]    --> src/interpreter.rs:267:30
[INFO] [stderr]     |
[INFO] [stderr] 267 |             Mem::Parameter { name } => {
[INFO] [stderr]     |                              ^^^^ help: try ignoring the field: `name: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `id`
[INFO] [stderr]   --> src/compiler.rs:36:27
[INFO] [stderr]    |
[INFO] [stderr] 36 |     fn load(&'a mut self, id: &str, env: Fingerprint, calls: &'a Vec<&'a (Function<V> + 'a)>)
[INFO] [stderr]    |                           ^^ help: consider prefixing with an underscore: `_id`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `env`
[INFO] [stderr]   --> src/compiler.rs:36:37
[INFO] [stderr]    |
[INFO] [stderr] 36 |     fn load(&'a mut self, id: &str, env: Fingerprint, calls: &'a Vec<&'a (Function<V> + 'a)>)
[INFO] [stderr]    |                                     ^^^ help: consider prefixing with an underscore: `_env`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `calls`
[INFO] [stderr]   --> src/compiler.rs:36:55
[INFO] [stderr]    |
[INFO] [stderr] 36 |     fn load(&'a mut self, id: &str, env: Fingerprint, calls: &'a Vec<&'a (Function<V> + 'a)>)
[INFO] [stderr]    |                                                       ^^^^^ help: consider prefixing with an underscore: `_calls`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `buf`
[INFO] [stderr]   --> src/compiler.rs:68:24
[INFO] [stderr]    |
[INFO] [stderr] 68 |     fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
[INFO] [stderr]    |                        ^^^ help: consider prefixing with an underscore: `_buf`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `input`
[INFO] [stderr]   --> src/compiler.rs:80:29
[INFO] [stderr]    |
[INFO] [stderr] 80 |         pub fn output<I, O>(input: &mut I, output: &mut O)
[INFO] [stderr]    |                             ^^^^^ help: consider prefixing with an underscore: `_input`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `output`
[INFO] [stderr]   --> src/compiler.rs:80:44
[INFO] [stderr]    |
[INFO] [stderr] 80 |         pub fn output<I, O>(input: &mut I, output: &mut O)
[INFO] [stderr]    |                                            ^^^^^^ help: consider prefixing with an underscore: `_output`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/interpreter.rs:136:45
[INFO] [stderr]     |
[INFO] [stderr] 136 |                     Instruction::Property { mut name } => {
[INFO] [stderr]     |                                             ----^^^^
[INFO] [stderr]     |                                             |
[INFO] [stderr]     |                                             help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Write`
[INFO] [stderr]   --> src/lib.rs:14:22
[INFO] [stderr]    |
[INFO] [stderr] 14 | use std::io::{ self, Write };
[INFO] [stderr]    |                      ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Read`
[INFO] [stderr]  --> src/interpreter.rs:4:16
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::io::{ Read, Write };
[INFO] [stderr]   |                ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `id`
[INFO] [stderr]   --> src/interpreter.rs:64:27
[INFO] [stderr]    |
[INFO] [stderr] 64 |     fn load(&'a mut self, id: &str, env: Fingerprint, calls: &'a Vec<&'a (Function<V> + 'a)>)
[INFO] [stderr]    |                           ^^ help: consider prefixing with an underscore: `_id`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `env`
[INFO] [stderr]   --> src/interpreter.rs:64:37
[INFO] [stderr]    |
[INFO] [stderr] 64 |     fn load(&'a mut self, id: &str, env: Fingerprint, calls: &'a Vec<&'a (Function<V> + 'a)>)
[INFO] [stderr]    |                                     ^^^ help: consider prefixing with an underscore: `_env`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `calls`
[INFO] [stderr]   --> src/interpreter.rs:64:55
[INFO] [stderr]    |
[INFO] [stderr] 64 |     fn load(&'a mut self, id: &str, env: Fingerprint, calls: &'a Vec<&'a (Function<V> + 'a)>)
[INFO] [stderr]    |                                                       ^^^^^ help: consider prefixing with an underscore: `_calls`
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `template_ooo`
[INFO] [stderr]   --> src/compiler.rs:77:5
[INFO] [stderr]    |
[INFO] [stderr] 77 |     pub struct template_ooo;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `output`
[INFO] [stderr]   --> src/compiler.rs:80:9
[INFO] [stderr]    |
[INFO] [stderr] 80 | /         pub fn output<I, O>(input: &mut I, output: &mut O)
[INFO] [stderr] 81 | |             -> Result<usize, io::Error>
[INFO] [stderr] 82 | |         where
[INFO] [stderr] 83 | |             I: io::Read + io::Seek, O: io::Write
[INFO] [stderr] ...  |
[INFO] [stderr] 86 | |             Ok(0)
[INFO] [stderr] 87 | |         }
[INFO] [stderr]    | |_________^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `name`
[INFO] [stderr]    --> src/interpreter.rs:136:49
[INFO] [stderr]     |
[INFO] [stderr] 136 |                     Instruction::Property { mut name } => {
[INFO] [stderr]     |                                             ----^^^^
[INFO] [stderr]     |                                             |
[INFO] [stderr]     |                                             help: try ignoring the field: `name: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `name`
[INFO] [stderr]    --> src/interpreter.rs:267:30
[INFO] [stderr]     |
[INFO] [stderr] 267 |             Mem::Parameter { name } => {
[INFO] [stderr]     |                              ^^^^ help: try ignoring the field: `name: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `id`
[INFO] [stderr]   --> src/compiler.rs:36:27
[INFO] [stderr]    |
[INFO] [stderr] 36 |     fn load(&'a mut self, id: &str, env: Fingerprint, calls: &'a Vec<&'a (Function<V> + 'a)>)
[INFO] [stderr]    |                           ^^ help: consider prefixing with an underscore: `_id`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `env`
[INFO] [stderr]   --> src/compiler.rs:36:37
[INFO] [stderr]    |
[INFO] [stderr] 36 |     fn load(&'a mut self, id: &str, env: Fingerprint, calls: &'a Vec<&'a (Function<V> + 'a)>)
[INFO] [stderr]    |                                     ^^^ help: consider prefixing with an underscore: `_env`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `calls`
[INFO] [stderr]   --> src/compiler.rs:36:55
[INFO] [stderr]    |
[INFO] [stderr] 36 |     fn load(&'a mut self, id: &str, env: Fingerprint, calls: &'a Vec<&'a (Function<V> + 'a)>)
[INFO] [stderr]    |                                                       ^^^^^ help: consider prefixing with an underscore: `_calls`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `buf`
[INFO] [stderr]   --> src/compiler.rs:68:24
[INFO] [stderr]    |
[INFO] [stderr] 68 |     fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
[INFO] [stderr]    |                        ^^^ help: consider prefixing with an underscore: `_buf`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `input`
[INFO] [stderr]   --> src/compiler.rs:80:29
[INFO] [stderr]    |
[INFO] [stderr] 80 |         pub fn output<I, O>(input: &mut I, output: &mut O)
[INFO] [stderr]    |                             ^^^^^ help: consider prefixing with an underscore: `_input`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `output`
[INFO] [stderr]   --> src/compiler.rs:80:44
[INFO] [stderr]    |
[INFO] [stderr] 80 |         pub fn output<I, O>(input: &mut I, output: &mut O)
[INFO] [stderr]    |                                            ^^^^^^ help: consider prefixing with an underscore: `_output`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/interpreter.rs:136:45
[INFO] [stderr]     |
[INFO] [stderr] 136 |                     Instruction::Property { mut name } => {
[INFO] [stderr]     |                                             ----^^^^
[INFO] [stderr]     |                                             |
[INFO] [stderr]     |                                             help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `template_ooo`
[INFO] [stderr]   --> src/compiler.rs:77:5
[INFO] [stderr]    |
[INFO] [stderr] 77 |     pub struct template_ooo;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `output`
[INFO] [stderr]   --> src/compiler.rs:80:9
[INFO] [stderr]    |
[INFO] [stderr] 80 | /         pub fn output<I, O>(input: &mut I, output: &mut O)
[INFO] [stderr] 81 | |             -> Result<usize, io::Error>
[INFO] [stderr] 82 | |         where
[INFO] [stderr] 83 | |             I: io::Read + io::Seek, O: io::Write
[INFO] [stderr] ...  |
[INFO] [stderr] 86 | |             Ok(0)
[INFO] [stderr] 87 | |         }
[INFO] [stderr]    | |_________^
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> tests/interpreter.rs:244:33
[INFO] [stderr]     |
[INFO] [stderr] 244 |     funs.insert("add", &add as &Function<Value>);
[INFO] [stderr]     |                                 ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Function<Value>`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> examples/hello_world.rs:61:45
[INFO] [stderr]    |
[INFO] [stderr] 61 |     let mut funs = HashMap::<&'static str, &Function<Value>>::new();
[INFO] [stderr]    |                                             ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Function<Value>`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Write`
[INFO] [stderr]  --> examples/hello_world.rs:4:22
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::io::{ Read, Write };
[INFO] [stderr]   |                      ^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `#[macro_use]` import
[INFO] [stderr]  --> tests/compiler.rs:2:1
[INFO] [stderr]   |
[INFO] [stderr] 2 | #[macro_use] extern crate log;
[INFO] [stderr]   | ^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `output_param`
[INFO] [stderr]   --> tests/compiler.rs:16:1
[INFO] [stderr]    |
[INFO] [stderr] 16 | fn output_param() {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.27s
[INFO] running `"docker" "inspect" "1b0df51c92b888a367223a3d48c2bc230f580b9c5511010d9489adafc6733c29"`
[INFO] running `"docker" "rm" "-f" "1b0df51c92b888a367223a3d48c2bc230f580b9c5511010d9489adafc6733c29"`
[INFO] [stdout] 1b0df51c92b888a367223a3d48c2bc230f580b9c5511010d9489adafc6733c29