[INFO] updating cached repository algon-320/mini-lisp-vm
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/algon-320/mini-lisp-vm
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/algon-320/mini-lisp-vm" "work/ex/pr-60162/sources/master#a850a426491e14186af2250549bf41256b5938d2/gh/algon-320/mini-lisp-vm"`
[INFO] [stderr] Cloning into 'work/ex/pr-60162/sources/master#a850a426491e14186af2250549bf41256b5938d2/gh/algon-320/mini-lisp-vm'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/algon-320/mini-lisp-vm" "work/ex/pr-60162/sources/try#06a150c7d11500b41499224f165e9de1de096768/gh/algon-320/mini-lisp-vm"`
[INFO] [stderr] Cloning into 'work/ex/pr-60162/sources/try#06a150c7d11500b41499224f165e9de1de096768/gh/algon-320/mini-lisp-vm'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] d16291ca044f1d42e154bbc19b130cb851f5b5d4
[INFO] sha for GitHub repo algon-320/mini-lisp-vm: d16291ca044f1d42e154bbc19b130cb851f5b5d4
[INFO] validating manifest of algon-320/mini-lisp-vm on toolchain master#a850a426491e14186af2250549bf41256b5938d2
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+a850a426491e14186af2250549bf41256b5938d2-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of algon-320/mini-lisp-vm on toolchain try#06a150c7d11500b41499224f165e9de1de096768
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+06a150c7d11500b41499224f165e9de1de096768-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing algon-320/mini-lisp-vm
[INFO] finished frobbing algon-320/mini-lisp-vm
[INFO] frobbed toml for algon-320/mini-lisp-vm written to work/ex/pr-60162/sources/master#a850a426491e14186af2250549bf41256b5938d2/gh/algon-320/mini-lisp-vm/Cargo.toml
[INFO] started frobbing algon-320/mini-lisp-vm
[INFO] finished frobbing algon-320/mini-lisp-vm
[INFO] frobbed toml for algon-320/mini-lisp-vm written to work/ex/pr-60162/sources/try#06a150c7d11500b41499224f165e9de1de096768/gh/algon-320/mini-lisp-vm/Cargo.toml
[INFO] crate algon-320/mini-lisp-vm already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+a850a426491e14186af2250549bf41256b5938d2-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+06a150c7d11500b41499224f165e9de1de096768-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking algon-320/mini-lisp-vm against try#06a150c7d11500b41499224f165e9de1de096768 for pr-60162
[INFO] running `"docker" "create" "-v" "/mnt/crater-raid/crater/work/local/target-dirs/pr-60162/worker-0/try#06a150c7d11500b41499224f165e9de1de096768:/opt/crater/target:rw,Z" "-v" "/mnt/crater-raid/crater/work/ex/pr-60162/sources/try#06a150c7d11500b41499224f165e9de1de096768/gh/algon-320/mini-lisp-vm:/opt/crater/workdir:ro,Z" "-v" "/mnt/crater-raid/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/crater-raid/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+06a150c7d11500b41499224f165e9de1de096768-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 84d4539a7bff2354ba8b5aa41d081d23219bcbcf47457f21febf0fbfcaa464b0
[INFO] running `"docker" "start" "-a" "84d4539a7bff2354ba8b5aa41d081d23219bcbcf47457f21febf0fbfcaa464b0"`
[INFO] [stderr]    Compiling mini-lisp-vm v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused imports: `Endian`, `INT_SIZE`, `UInt`
[INFO] [stderr]  --> src/util.rs:1:10
[INFO] [stderr]   |
[INFO] [stderr] 1 | use vm::{Endian, UInt, INT_SIZE};
[INFO] [stderr]   |          ^^^^^^  ^^^^  ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Endian`, `INT_SIZE`, `UInt`
[INFO] [stderr]  --> src/util.rs:1:10
[INFO] [stderr]   |
[INFO] [stderr] 1 | use vm::{Endian, UInt, INT_SIZE};
[INFO] [stderr]   |          ^^^^^^  ^^^^  ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `util`
[INFO] [stderr]   --> src/util.rs:64:9
[INFO] [stderr]    |
[INFO] [stderr] 64 |     use util;
[INFO] [stderr]    |         ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable pattern
[INFO] [stderr]   --> src/structures.rs:57:13
[INFO] [stderr]    |
[INFO] [stderr] 57 |             _ => "(undefined)",
[INFO] [stderr]    |             ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unreachable_patterns)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `args`
[INFO] [stderr]   --> src/structures.rs:55:26
[INFO] [stderr]    |
[INFO] [stderr] 55 |             Elem::Func { args, ops, env } => "Func",
[INFO] [stderr]    |                          ^^^^ help: try ignoring the field: `args: _`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `env`
[INFO] [stderr]   --> src/structures.rs:55:37
[INFO] [stderr]    |
[INFO] [stderr] 55 |             Elem::Func { args, ops, env } => "Func",
[INFO] [stderr]    |                                     ^^^ help: try ignoring the field: `env: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `ops`
[INFO] [stderr]   --> src/structures.rs:55:32
[INFO] [stderr]    |
[INFO] [stderr] 55 |             Elem::Func { args, ops, env } => "Func",
[INFO] [stderr]    |                                ^^^ help: try ignoring the field: `ops: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `sequence`
[INFO] [stderr]   --> src/vm/virtual_machine.rs:62:17
[INFO] [stderr]    |
[INFO] [stderr] 62 |     pub fn exec(sequence: &[u8]) -> Result<(), String> {
[INFO] [stderr]    |                 ^^^^^^^^ help: consider prefixing with an underscore: `_sequence`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `src`
[INFO] [stderr]    --> src/vm/virtual_machine.rs:159:30
[INFO] [stderr]     |
[INFO] [stderr] 159 |     pub fn op_sub(&mut self, src: &Operand, dst: &Operand) {
[INFO] [stderr]     |                              ^^^ help: consider prefixing with an underscore: `_src`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `dst`
[INFO] [stderr]    --> src/vm/virtual_machine.rs:159:45
[INFO] [stderr]     |
[INFO] [stderr] 159 |     pub fn op_sub(&mut self, src: &Operand, dst: &Operand) {
[INFO] [stderr]     |                                             ^^^ help: consider prefixing with an underscore: `_dst`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `src`
[INFO] [stderr]    --> src/vm/virtual_machine.rs:162:30
[INFO] [stderr]     |
[INFO] [stderr] 162 |     pub fn op_mul(&mut self, src: &Operand, dst: &Operand) {
[INFO] [stderr]     |                              ^^^ help: consider prefixing with an underscore: `_src`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `dst`
[INFO] [stderr]    --> src/vm/virtual_machine.rs:162:45
[INFO] [stderr]     |
[INFO] [stderr] 162 |     pub fn op_mul(&mut self, src: &Operand, dst: &Operand) {
[INFO] [stderr]     |                                             ^^^ help: consider prefixing with an underscore: `_dst`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `src`
[INFO] [stderr]    --> src/vm/virtual_machine.rs:165:30
[INFO] [stderr]     |
[INFO] [stderr] 165 |     pub fn op_div(&mut self, src: &Operand, dst: &Operand) {
[INFO] [stderr]     |                              ^^^ help: consider prefixing with an underscore: `_src`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `dst`
[INFO] [stderr]    --> src/vm/virtual_machine.rs:165:45
[INFO] [stderr]     |
[INFO] [stderr] 165 |     pub fn op_div(&mut self, src: &Operand, dst: &Operand) {
[INFO] [stderr]     |                                             ^^^ help: consider prefixing with an underscore: `_dst`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `src`
[INFO] [stderr]    --> src/vm/virtual_machine.rs:168:30
[INFO] [stderr]     |
[INFO] [stderr] 168 |     pub fn op_mod(&mut self, src: &Operand, dst: &Operand) {
[INFO] [stderr]     |                              ^^^ help: consider prefixing with an underscore: `_src`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `dst`
[INFO] [stderr]    --> src/vm/virtual_machine.rs:168:45
[INFO] [stderr]     |
[INFO] [stderr] 168 |     pub fn op_mod(&mut self, src: &Operand, dst: &Operand) {
[INFO] [stderr]     |                                             ^^^ help: consider prefixing with an underscore: `_dst`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `sym`
[INFO] [stderr]   --> src/compiler.rs:41:22
[INFO] [stderr]    |
[INFO] [stderr] 41 |         Elem::Symbol(sym) => {}
[INFO] [stderr]    |                      ^^^ help: consider prefixing with an underscore: `_sym`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `args`
[INFO] [stderr]   --> src/compiler.rs:56:22
[INFO] [stderr]    |
[INFO] [stderr] 56 |         Elem::Func { args, ops, env } => {}
[INFO] [stderr]    |                      ^^^^ help: try ignoring the field: `args: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `env`
[INFO] [stderr]   --> src/compiler.rs:56:33
[INFO] [stderr]    |
[INFO] [stderr] 56 |         Elem::Func { args, ops, env } => {}
[INFO] [stderr]    |                                 ^^^ help: try ignoring the field: `env: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `ops`
[INFO] [stderr]   --> src/compiler.rs:56:28
[INFO] [stderr]    |
[INFO] [stderr] 56 |         Elem::Func { args, ops, env } => {}
[INFO] [stderr]    |                            ^^^ help: try ignoring the field: `ops: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `name`
[INFO] [stderr]   --> src/compiler.rs:57:27
[INFO] [stderr]    |
[INFO] [stderr] 57 |         Elem::BuiltinFunc(name) => {}
[INFO] [stderr]    |                           ^^^^ help: consider prefixing with an underscore: `_name`
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable pattern
[INFO] [stderr]   --> src/structures.rs:57:13
[INFO] [stderr]    |
[INFO] [stderr] 57 |             _ => "(undefined)",
[INFO] [stderr]    |             ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unreachable_patterns)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Func`
[INFO] [stderr]   --> src/structures.rs:18:5
[INFO] [stderr]    |
[INFO] [stderr] 18 | /     Func {
[INFO] [stderr] 19 | |         args: List,
[INFO] [stderr] 20 | |         ops: List,
[INFO] [stderr] 21 | |         env: Rc<RefCell<Env>>,
[INFO] [stderr] 22 | |     },
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `BuiltinFunc`
[INFO] [stderr]   --> src/structures.rs:23:5
[INFO] [stderr]    |
[INFO] [stderr] 23 |     BuiltinFunc(String),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `type_name`
[INFO] [stderr]   --> src/structures.rs:48:5
[INFO] [stderr]    |
[INFO] [stderr] 48 |     pub fn type_name(&self) -> &str {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `extract_list`
[INFO] [stderr]   --> src/structures.rs:60:5
[INFO] [stderr]    |
[INFO] [stderr] 60 |     pub fn extract_list(&self) -> Result<List, String> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `extract_symbol`
[INFO] [stderr]   --> src/structures.rs:69:5
[INFO] [stderr]    |
[INFO] [stderr] 69 |     pub fn extract_symbol(&self) -> Result<String, String> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `extract_int`
[INFO] [stderr]   --> src/structures.rs:78:5
[INFO] [stderr]    |
[INFO] [stderr] 78 |     pub fn extract_int(&self) -> Result<UInt, String> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `extract_bool`
[INFO] [stderr]   --> src/structures.rs:87:5
[INFO] [stderr]    |
[INFO] [stderr] 87 |     pub fn extract_bool(&self) -> Result<bool, String> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `extract_string`
[INFO] [stderr]   --> src/structures.rs:96:5
[INFO] [stderr]    |
[INFO] [stderr] 96 |     pub fn extract_string(&self) -> Result<String, String> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `extract_func`
[INFO] [stderr]    --> src/structures.rs:105:5
[INFO] [stderr]     |
[INFO] [stderr] 105 |     pub fn extract_func(&self) -> Result<(List, List, Rc<RefCell<Env>>), String> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `unit`
[INFO] [stderr]    --> src/structures.rs:126:5
[INFO] [stderr]     |
[INFO] [stderr] 126 |     pub fn unit() -> List {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]    --> src/structures.rs:160:5
[INFO] [stderr]     |
[INFO] [stderr] 160 |     pub fn new() -> Env {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/structures.rs:136:9
[INFO] [stderr]     |
[INFO] [stderr] 136 |         write!(f, "(");
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]     = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/structures.rs:138:13
[INFO] [stderr]     |
[INFO] [stderr] 138 |             write!(f, "{:?}", e);
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]     = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/structures.rs:140:17
[INFO] [stderr]     |
[INFO] [stderr] 140 |                 write!(f, " ");
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]     = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `args`
[INFO] [stderr]   --> src/structures.rs:55:26
[INFO] [stderr]    |
[INFO] [stderr] 55 |             Elem::Func { args, ops, env } => "Func",
[INFO] [stderr]    |                          ^^^^ help: try ignoring the field: `args: _`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `env`
[INFO] [stderr]   --> src/structures.rs:55:37
[INFO] [stderr]    |
[INFO] [stderr] 55 |             Elem::Func { args, ops, env } => "Func",
[INFO] [stderr]    |                                     ^^^ help: try ignoring the field: `env: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `ops`
[INFO] [stderr]   --> src/structures.rs:55:32
[INFO] [stderr]    |
[INFO] [stderr] 55 |             Elem::Func { args, ops, env } => "Func",
[INFO] [stderr]    |                                ^^^ help: try ignoring the field: `ops: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `ptr`
[INFO] [stderr]    --> src/vm/virtual_machine.rs:263:15
[INFO] [stderr]     |
[INFO] [stderr] 263 |     if let Ok(ptr) = vm.op_malloc(VM_HEAP_SIZE) {
[INFO] [stderr]     |               ^^^ help: consider prefixing with an underscore: `_ptr`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `sequence`
[INFO] [stderr]   --> src/vm/virtual_machine.rs:62:17
[INFO] [stderr]    |
[INFO] [stderr] 62 |     pub fn exec(sequence: &[u8]) -> Result<(), String> {
[INFO] [stderr]    |                 ^^^^^^^^ help: consider prefixing with an underscore: `_sequence`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `src`
[INFO] [stderr]    --> src/vm/virtual_machine.rs:159:30
[INFO] [stderr]     |
[INFO] [stderr] 159 |     pub fn op_sub(&mut self, src: &Operand, dst: &Operand) {
[INFO] [stderr]     |                              ^^^ help: consider prefixing with an underscore: `_src`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `dst`
[INFO] [stderr]    --> src/vm/virtual_machine.rs:159:45
[INFO] [stderr]     |
[INFO] [stderr] 159 |     pub fn op_sub(&mut self, src: &Operand, dst: &Operand) {
[INFO] [stderr]     |                                             ^^^ help: consider prefixing with an underscore: `_dst`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `src`
[INFO] [stderr]    --> src/vm/virtual_machine.rs:162:30
[INFO] [stderr]     |
[INFO] [stderr] 162 |     pub fn op_mul(&mut self, src: &Operand, dst: &Operand) {
[INFO] [stderr]     |                              ^^^ help: consider prefixing with an underscore: `_src`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `dst`
[INFO] [stderr]    --> src/vm/virtual_machine.rs:162:45
[INFO] [stderr]     |
[INFO] [stderr] 162 |     pub fn op_mul(&mut self, src: &Operand, dst: &Operand) {
[INFO] [stderr]     |                                             ^^^ help: consider prefixing with an underscore: `_dst`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `src`
[INFO] [stderr]    --> src/vm/virtual_machine.rs:165:30
[INFO] [stderr]     |
[INFO] [stderr] 165 |     pub fn op_div(&mut self, src: &Operand, dst: &Operand) {
[INFO] [stderr]     |                              ^^^ help: consider prefixing with an underscore: `_src`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `dst`
[INFO] [stderr]    --> src/vm/virtual_machine.rs:165:45
[INFO] [stderr]     |
[INFO] [stderr] 165 |     pub fn op_div(&mut self, src: &Operand, dst: &Operand) {
[INFO] [stderr]     |                                             ^^^ help: consider prefixing with an underscore: `_dst`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `src`
[INFO] [stderr]    --> src/vm/virtual_machine.rs:168:30
[INFO] [stderr]     |
[INFO] [stderr] 168 |     pub fn op_mod(&mut self, src: &Operand, dst: &Operand) {
[INFO] [stderr]     |                              ^^^ help: consider prefixing with an underscore: `_src`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `dst`
[INFO] [stderr]    --> src/vm/virtual_machine.rs:168:45
[INFO] [stderr]     |
[INFO] [stderr] 168 |     pub fn op_mod(&mut self, src: &Operand, dst: &Operand) {
[INFO] [stderr]     |                                             ^^^ help: consider prefixing with an underscore: `_dst`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `sym`
[INFO] [stderr]   --> src/compiler.rs:41:22
[INFO] [stderr]    |
[INFO] [stderr] 41 |         Elem::Symbol(sym) => {}
[INFO] [stderr]    |                      ^^^ help: consider prefixing with an underscore: `_sym`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `args`
[INFO] [stderr]   --> src/compiler.rs:56:22
[INFO] [stderr]    |
[INFO] [stderr] 56 |         Elem::Func { args, ops, env } => {}
[INFO] [stderr]    |                      ^^^^ help: try ignoring the field: `args: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `env`
[INFO] [stderr]   --> src/compiler.rs:56:33
[INFO] [stderr]    |
[INFO] [stderr] 56 |         Elem::Func { args, ops, env } => {}
[INFO] [stderr]    |                                 ^^^ help: try ignoring the field: `env: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `ops`
[INFO] [stderr]   --> src/compiler.rs:56:28
[INFO] [stderr]    |
[INFO] [stderr] 56 |         Elem::Func { args, ops, env } => {}
[INFO] [stderr]    |                            ^^^ help: try ignoring the field: `ops: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `name`
[INFO] [stderr]   --> src/compiler.rs:57:27
[INFO] [stderr]    |
[INFO] [stderr] 57 |         Elem::BuiltinFunc(name) => {}
[INFO] [stderr]    |                           ^^^^ help: consider prefixing with an underscore: `_name`
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Func`
[INFO] [stderr]   --> src/structures.rs:18:5
[INFO] [stderr]    |
[INFO] [stderr] 18 | /     Func {
[INFO] [stderr] 19 | |         args: List,
[INFO] [stderr] 20 | |         ops: List,
[INFO] [stderr] 21 | |         env: Rc<RefCell<Env>>,
[INFO] [stderr] 22 | |     },
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `BuiltinFunc`
[INFO] [stderr]   --> src/structures.rs:23:5
[INFO] [stderr]    |
[INFO] [stderr] 23 |     BuiltinFunc(String),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `type_name`
[INFO] [stderr]   --> src/structures.rs:48:5
[INFO] [stderr]    |
[INFO] [stderr] 48 |     pub fn type_name(&self) -> &str {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `extract_list`
[INFO] [stderr]   --> src/structures.rs:60:5
[INFO] [stderr]    |
[INFO] [stderr] 60 |     pub fn extract_list(&self) -> Result<List, String> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `extract_symbol`
[INFO] [stderr]   --> src/structures.rs:69:5
[INFO] [stderr]    |
[INFO] [stderr] 69 |     pub fn extract_symbol(&self) -> Result<String, String> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `extract_int`
[INFO] [stderr]   --> src/structures.rs:78:5
[INFO] [stderr]    |
[INFO] [stderr] 78 |     pub fn extract_int(&self) -> Result<UInt, String> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `extract_bool`
[INFO] [stderr]   --> src/structures.rs:87:5
[INFO] [stderr]    |
[INFO] [stderr] 87 |     pub fn extract_bool(&self) -> Result<bool, String> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `extract_string`
[INFO] [stderr]   --> src/structures.rs:96:5
[INFO] [stderr]    |
[INFO] [stderr] 96 |     pub fn extract_string(&self) -> Result<String, String> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `extract_func`
[INFO] [stderr]    --> src/structures.rs:105:5
[INFO] [stderr]     |
[INFO] [stderr] 105 |     pub fn extract_func(&self) -> Result<(List, List, Rc<RefCell<Env>>), String> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `unit`
[INFO] [stderr]    --> src/structures.rs:126:5
[INFO] [stderr]     |
[INFO] [stderr] 126 |     pub fn unit() -> List {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]    --> src/structures.rs:160:5
[INFO] [stderr]     |
[INFO] [stderr] 160 |     pub fn new() -> Env {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/structures.rs:136:9
[INFO] [stderr]     |
[INFO] [stderr] 136 |         write!(f, "(");
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]     = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/structures.rs:138:13
[INFO] [stderr]     |
[INFO] [stderr] 138 |             write!(f, "{:?}", e);
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]     = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/structures.rs:140:17
[INFO] [stderr]     |
[INFO] [stderr] 140 |                 write!(f, " ");
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]     = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.11s
[INFO] running `"docker" "inspect" "84d4539a7bff2354ba8b5aa41d081d23219bcbcf47457f21febf0fbfcaa464b0"`
[INFO] running `"docker" "rm" "-f" "84d4539a7bff2354ba8b5aa41d081d23219bcbcf47457f21febf0fbfcaa464b0"`
[INFO] [stdout] 84d4539a7bff2354ba8b5aa41d081d23219bcbcf47457f21febf0fbfcaa464b0