Dec 19 05:02:02.351 INFO checking yiransheng/rust-lox against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 05:02:02.351 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-7/master#d99a320cba42f661aebfa1293b7b2ec3603dda75:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/gh/yiransheng/rust-lox:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/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" "+d99a320cba42f661aebfa1293b7b2ec3603dda75-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 19 05:02:02.853 INFO [stdout] 61730bc1e202f56d69418cf12e4080911ea9bbdb2903a5da63aebeba3361a8cd
Dec 19 05:02:02.856 INFO running `"docker" "start" "-a" "61730bc1e202f56d69418cf12e4080911ea9bbdb2903a5da63aebeba3361a8cd"`
Dec 19 05:02:04.852 INFO [stderr]    Compiling num-bigint v0.2.0
Dec 19 05:02:04.854 INFO [stderr]    Compiling num-iter v0.1.37
Dec 19 05:02:04.860 INFO [stderr]    Compiling num-rational v0.2.1
Dec 19 05:02:04.860 INFO [stderr]    Compiling num-complex v0.2.1
Dec 19 05:02:04.868 INFO [stderr]     Checking arraydeque v0.4.3
Dec 19 05:02:04.868 INFO [stderr]    Compiling syn v0.15.9
Dec 19 05:02:13.644 INFO [stderr]     Checking num v0.2.0
Dec 19 05:02:19.613 INFO [stderr]    Compiling num-derive v0.2.3
Dec 19 05:02:24.848 INFO [stderr]     Checking loxvm v0.1.0 (/opt/crater/workdir)
Dec 19 05:02:25.224 INFO [stderr] warning: unused import: `object::*`
Dec 19 05:02:25.224 INFO [stderr]  --> src/compiler.rs:3:5
Dec 19 05:02:25.224 INFO [stderr]   |
Dec 19 05:02:25.224 INFO [stderr] 3 | use object::*;
Dec 19 05:02:25.224 INFO [stderr]   |     ^^^^^^^^^
Dec 19 05:02:25.224 INFO [stderr]   |
Dec 19 05:02:25.224 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 19 05:02:25.224 INFO [stderr] 
Dec 19 05:02:25.228 INFO [stderr] warning: unused import: `Into`
Dec 19 05:02:25.228 INFO [stderr]  --> src/value.rs:2:26
Dec 19 05:02:25.228 INFO [stderr]   |
Dec 19 05:02:25.228 INFO [stderr] 2 | use std::convert::{From, Into};
Dec 19 05:02:25.228 INFO [stderr]   |                          ^^^^
Dec 19 05:02:25.228 INFO [stderr] 
Dec 19 05:02:25.228 INFO [stderr] warning: unused import: `common::*`
Dec 19 05:02:25.228 INFO [stderr]   --> src/main.rs:17:5
Dec 19 05:02:25.228 INFO [stderr]    |
Dec 19 05:02:25.228 INFO [stderr] 17 | use common::*;
Dec 19 05:02:25.228 INFO [stderr]    |     ^^^^^^^^^
Dec 19 05:02:25.228 INFO [stderr] 
Dec 19 05:02:25.228 INFO [stderr] warning: unused import: `scanner::Scanner`
Dec 19 05:02:25.228 INFO [stderr]   --> src/main.rs:19:5
Dec 19 05:02:25.228 INFO [stderr]    |
Dec 19 05:02:25.228 INFO [stderr] 19 | use scanner::Scanner;
Dec 19 05:02:25.228 INFO [stderr]    |     ^^^^^^^^^^^^^^^^
Dec 19 05:02:25.228 INFO [stderr] 
Dec 19 05:02:25.228 INFO [stderr] warning: unused import: `scanner::TokenType`
Dec 19 05:02:25.228 INFO [stderr]   --> src/main.rs:20:5
Dec 19 05:02:25.228 INFO [stderr]    |
Dec 19 05:02:25.228 INFO [stderr] 20 | use scanner::TokenType;
Dec 19 05:02:25.228 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^
Dec 19 05:02:25.228 INFO [stderr] 
Dec 19 05:02:25.294 INFO [stderr] warning: unused import: `object::*`
Dec 19 05:02:25.294 INFO [stderr]  --> src/compiler.rs:3:5
Dec 19 05:02:25.294 INFO [stderr]   |
Dec 19 05:02:25.294 INFO [stderr] 3 | use object::*;
Dec 19 05:02:25.294 INFO [stderr]   |     ^^^^^^^^^
Dec 19 05:02:25.294 INFO [stderr]   |
Dec 19 05:02:25.294 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 19 05:02:25.294 INFO [stderr] 
Dec 19 05:02:25.294 INFO [stderr] warning: unused import: `Into`
Dec 19 05:02:25.294 INFO [stderr]  --> src/value.rs:2:26
Dec 19 05:02:25.294 INFO [stderr]   |
Dec 19 05:02:25.294 INFO [stderr] 2 | use std::convert::{From, Into};
Dec 19 05:02:25.294 INFO [stderr]   |                          ^^^^
Dec 19 05:02:25.294 INFO [stderr] 
Dec 19 05:02:25.294 INFO [stderr] warning: unused import: `common::*`
Dec 19 05:02:25.294 INFO [stderr]   --> src/main.rs:17:5
Dec 19 05:02:25.294 INFO [stderr]    |
Dec 19 05:02:25.294 INFO [stderr] 17 | use common::*;
Dec 19 05:02:25.294 INFO [stderr]    |     ^^^^^^^^^
Dec 19 05:02:25.294 INFO [stderr] 
Dec 19 05:02:25.294 INFO [stderr] warning: unused import: `scanner::Scanner`
Dec 19 05:02:25.294 INFO [stderr]   --> src/main.rs:19:5
Dec 19 05:02:25.294 INFO [stderr]    |
Dec 19 05:02:25.294 INFO [stderr] 19 | use scanner::Scanner;
Dec 19 05:02:25.294 INFO [stderr]    |     ^^^^^^^^^^^^^^^^
Dec 19 05:02:25.294 INFO [stderr] 
Dec 19 05:02:25.294 INFO [stderr] warning: unused import: `scanner::TokenType`
Dec 19 05:02:25.294 INFO [stderr]   --> src/main.rs:20:5
Dec 19 05:02:25.294 INFO [stderr]    |
Dec 19 05:02:25.294 INFO [stderr] 20 | use scanner::TokenType;
Dec 19 05:02:25.294 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^
Dec 19 05:02:25.294 INFO [stderr] 
Dec 19 05:02:26.140 INFO [stderr] warning: variant is never constructed: `TooManyConstants`
Dec 19 05:02:26.140 INFO [stderr]   --> src/compiler.rs:19:5
Dec 19 05:02:26.140 INFO [stderr]    |
Dec 19 05:02:26.140 INFO [stderr] 19 |     TooManyConstants,
Dec 19 05:02:26.140 INFO [stderr]    |     ^^^^^^^^^^^^^^^^
Dec 19 05:02:26.140 INFO [stderr]    |
Dec 19 05:02:26.140 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 19 05:02:26.141 INFO [stderr] 
Dec 19 05:02:26.141 INFO [stderr] warning: method is never used: `error_at_current`
Dec 19 05:02:26.141 INFO [stderr]    --> src/compiler.rs:361:5
Dec 19 05:02:26.141 INFO [stderr]     |
Dec 19 05:02:26.141 INFO [stderr] 361 |     fn error_at_current(&mut self, message: &str) -> CompileError {
Dec 19 05:02:26.141 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 05:02:26.141 INFO [stderr] 
Dec 19 05:02:26.141 INFO [stderr] warning: variant is never constructed: `Function`
Dec 19 05:02:26.141 INFO [stderr]  --> src/object.rs:7:5
Dec 19 05:02:26.141 INFO [stderr]   |
Dec 19 05:02:26.141 INFO [stderr] 7 |     Function,
Dec 19 05:02:26.141 INFO [stderr]   |     ^^^^^^^^
Dec 19 05:02:26.141 INFO [stderr] 
Dec 19 05:02:26.141 INFO [stderr] warning: method is never used: `identifier_equal`
Dec 19 05:02:26.141 INFO [stderr]   --> src/scanner/token.rs:64:5
Dec 19 05:02:26.141 INFO [stderr]    |
Dec 19 05:02:26.141 INFO [stderr] 64 |     pub fn identifier_equal(&self, other: &Token<'a>) -> bool {
Dec 19 05:02:26.141 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 05:02:26.141 INFO [stderr] 
Dec 19 05:02:26.141 INFO [stderr] warning: method is never used: `take`
Dec 19 05:02:26.141 INFO [stderr]   --> src/value.rs:43:5
Dec 19 05:02:26.141 INFO [stderr]    |
Dec 19 05:02:26.141 INFO [stderr] 43 |     pub fn take(&mut self) -> Value<O> {
Dec 19 05:02:26.141 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 05:02:26.141 INFO [stderr] 
Dec 19 05:02:26.142 INFO [stderr] warning: method is never used: `into_bool`
Dec 19 05:02:26.142 INFO [stderr]   --> src/value.rs:52:5
Dec 19 05:02:26.142 INFO [stderr]    |
Dec 19 05:02:26.142 INFO [stderr] 52 |     pub fn into_bool(self) -> Option<bool> {
Dec 19 05:02:26.142 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 05:02:26.142 INFO [stderr] 
Dec 19 05:02:26.143 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 05:02:26.143 INFO [stderr]    --> src/chunk.rs:111:13
Dec 19 05:02:26.143 INFO [stderr]     |
Dec 19 05:02:26.143 INFO [stderr] 111 |             write!(write_to, "   | ");
Dec 19 05:02:26.143 INFO [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 05:02:26.143 INFO [stderr]     |
Dec 19 05:02:26.143 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Dec 19 05:02:26.143 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 05:02:26.143 INFO [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 19 05:02:26.143 INFO [stderr] 
Dec 19 05:02:26.143 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 05:02:26.143 INFO [stderr]    --> src/chunk.rs:113:13
Dec 19 05:02:26.143 INFO [stderr]     |
Dec 19 05:02:26.143 INFO [stderr] 113 |             write!(write_to, "{:04} ", line_no);
Dec 19 05:02:26.143 INFO [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 05:02:26.143 INFO [stderr]     |
Dec 19 05:02:26.143 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 05:02:26.143 INFO [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 19 05:02:26.143 INFO [stderr] 
Dec 19 05:02:26.144 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 05:02:26.144 INFO [stderr]    --> src/chunk.rs:141:17
Dec 19 05:02:26.144 INFO [stderr]     |
Dec 19 05:02:26.144 INFO [stderr] 141 |                 writeln!(write_to, "Unknown OptCode {}", instr);
Dec 19 05:02:26.144 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 05:02:26.144 INFO [stderr]     |
Dec 19 05:02:26.144 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 05:02:26.145 INFO [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 19 05:02:26.145 INFO [stderr] 
Dec 19 05:02:26.145 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 05:02:26.145 INFO [stderr]    --> src/chunk.rs:152:9
Dec 19 05:02:26.145 INFO [stderr]     |
Dec 19 05:02:26.145 INFO [stderr] 152 |         writeln!(write_to, "{}", name);
Dec 19 05:02:26.145 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 05:02:26.145 INFO [stderr]     |
Dec 19 05:02:26.145 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 05:02:26.145 INFO [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 19 05:02:26.145 INFO [stderr] 
Dec 19 05:02:26.145 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 05:02:26.145 INFO [stderr]    --> src/chunk.rs:163:9
Dec 19 05:02:26.145 INFO [stderr]     |
Dec 19 05:02:26.145 INFO [stderr] 163 |         write!(write_to, "{:<16} {:04} ", name, constant);
Dec 19 05:02:26.145 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 05:02:26.145 INFO [stderr]     |
Dec 19 05:02:26.145 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 05:02:26.145 INFO [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 19 05:02:26.145 INFO [stderr] 
Dec 19 05:02:26.145 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 05:02:26.146 INFO [stderr]    --> src/chunk.rs:164:9
Dec 19 05:02:26.146 INFO [stderr]     |
Dec 19 05:02:26.146 INFO [stderr] 164 |         writeln!(write_to, "{}", self.constants[constant as usize]);
Dec 19 05:02:26.146 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 05:02:26.146 INFO [stderr]     |
Dec 19 05:02:26.146 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 05:02:26.146 INFO [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 19 05:02:26.146 INFO [stderr] 
Dec 19 05:02:26.156 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 05:02:26.156 INFO [stderr]    --> src/vm.rs:227:9
Dec 19 05:02:26.156 INFO [stderr]     |
Dec 19 05:02:26.156 INFO [stderr] 227 |         writeln!(self.output, "{}", v);
Dec 19 05:02:26.156 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 05:02:26.156 INFO [stderr]     |
Dec 19 05:02:26.156 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 05:02:26.156 INFO [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 19 05:02:26.156 INFO [stderr] 
Dec 19 05:02:26.157 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 05:02:26.157 INFO [stderr]   --> src/main.rs:38:13
Dec 19 05:02:26.157 INFO [stderr]    |
Dec 19 05:02:26.157 INFO [stderr] 38 |             vm.interpret();
Dec 19 05:02:26.157 INFO [stderr]    |             ^^^^^^^^^^^^^^^
Dec 19 05:02:26.157 INFO [stderr]    |
Dec 19 05:02:26.157 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 05:02:26.157 INFO [stderr] 
Dec 19 05:02:26.221 INFO [stderr] warning: variant is never constructed: `TooManyConstants`
Dec 19 05:02:26.221 INFO [stderr]   --> src/compiler.rs:19:5
Dec 19 05:02:26.221 INFO [stderr]    |
Dec 19 05:02:26.221 INFO [stderr] 19 |     TooManyConstants,
Dec 19 05:02:26.221 INFO [stderr]    |     ^^^^^^^^^^^^^^^^
Dec 19 05:02:26.221 INFO [stderr]    |
Dec 19 05:02:26.221 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 19 05:02:26.221 INFO [stderr] 
Dec 19 05:02:26.221 INFO [stderr] warning: method is never used: `error_at_current`
Dec 19 05:02:26.221 INFO [stderr]    --> src/compiler.rs:361:5
Dec 19 05:02:26.221 INFO [stderr]     |
Dec 19 05:02:26.221 INFO [stderr] 361 |     fn error_at_current(&mut self, message: &str) -> CompileError {
Dec 19 05:02:26.221 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 05:02:26.221 INFO [stderr] 
Dec 19 05:02:26.221 INFO [stderr] warning: variant is never constructed: `Function`
Dec 19 05:02:26.221 INFO [stderr]  --> src/object.rs:7:5
Dec 19 05:02:26.221 INFO [stderr]   |
Dec 19 05:02:26.221 INFO [stderr] 7 |     Function,
Dec 19 05:02:26.221 INFO [stderr]   |     ^^^^^^^^
Dec 19 05:02:26.221 INFO [stderr] 
Dec 19 05:02:26.221 INFO [stderr] warning: method is never used: `identifier_equal`
Dec 19 05:02:26.221 INFO [stderr]   --> src/scanner/token.rs:64:5
Dec 19 05:02:26.221 INFO [stderr]    |
Dec 19 05:02:26.221 INFO [stderr] 64 |     pub fn identifier_equal(&self, other: &Token<'a>) -> bool {
Dec 19 05:02:26.221 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 05:02:26.222 INFO [stderr] 
Dec 19 05:02:26.222 INFO [stderr] warning: method is never used: `take`
Dec 19 05:02:26.222 INFO [stderr]   --> src/value.rs:43:5
Dec 19 05:02:26.222 INFO [stderr]    |
Dec 19 05:02:26.222 INFO [stderr] 43 |     pub fn take(&mut self) -> Value<O> {
Dec 19 05:02:26.222 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 05:02:26.222 INFO [stderr] 
Dec 19 05:02:26.228 INFO [stderr] warning: method is never used: `into_bool`
Dec 19 05:02:26.228 INFO [stderr]   --> src/value.rs:52:5
Dec 19 05:02:26.228 INFO [stderr]    |
Dec 19 05:02:26.228 INFO [stderr] 52 |     pub fn into_bool(self) -> Option<bool> {
Dec 19 05:02:26.228 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 05:02:26.228 INFO [stderr] 
Dec 19 05:02:26.228 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 05:02:26.229 INFO [stderr]    --> src/chunk.rs:111:13
Dec 19 05:02:26.229 INFO [stderr]     |
Dec 19 05:02:26.229 INFO [stderr] 111 |             write!(write_to, "   | ");
Dec 19 05:02:26.229 INFO [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 05:02:26.229 INFO [stderr]     |
Dec 19 05:02:26.229 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Dec 19 05:02:26.229 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 05:02:26.229 INFO [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 19 05:02:26.229 INFO [stderr] 
Dec 19 05:02:26.229 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 05:02:26.229 INFO [stderr]    --> src/chunk.rs:113:13
Dec 19 05:02:26.229 INFO [stderr]     |
Dec 19 05:02:26.229 INFO [stderr] 113 |             write!(write_to, "{:04} ", line_no);
Dec 19 05:02:26.229 INFO [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 05:02:26.229 INFO [stderr]     |
Dec 19 05:02:26.229 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 05:02:26.229 INFO [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 19 05:02:26.229 INFO [stderr] 
Dec 19 05:02:26.229 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 05:02:26.229 INFO [stderr]    --> src/chunk.rs:141:17
Dec 19 05:02:26.229 INFO [stderr]     |
Dec 19 05:02:26.229 INFO [stderr] 141 |                 writeln!(write_to, "Unknown OptCode {}", instr);
Dec 19 05:02:26.229 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 05:02:26.229 INFO [stderr]     |
Dec 19 05:02:26.229 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 05:02:26.229 INFO [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 19 05:02:26.229 INFO [stderr] 
Dec 19 05:02:26.229 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 05:02:26.229 INFO [stderr]    --> src/chunk.rs:152:9
Dec 19 05:02:26.229 INFO [stderr]     |
Dec 19 05:02:26.229 INFO [stderr] 152 |         writeln!(write_to, "{}", name);
Dec 19 05:02:26.229 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 05:02:26.229 INFO [stderr]     |
Dec 19 05:02:26.229 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 05:02:26.229 INFO [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 19 05:02:26.229 INFO [stderr] 
Dec 19 05:02:26.229 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 05:02:26.229 INFO [stderr]    --> src/chunk.rs:163:9
Dec 19 05:02:26.229 INFO [stderr]     |
Dec 19 05:02:26.229 INFO [stderr] 163 |         write!(write_to, "{:<16} {:04} ", name, constant);
Dec 19 05:02:26.229 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 05:02:26.229 INFO [stderr]     |
Dec 19 05:02:26.229 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 05:02:26.229 INFO [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 19 05:02:26.229 INFO [stderr] 
Dec 19 05:02:26.229 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 05:02:26.229 INFO [stderr]    --> src/chunk.rs:164:9
Dec 19 05:02:26.229 INFO [stderr]     |
Dec 19 05:02:26.229 INFO [stderr] 164 |         writeln!(write_to, "{}", self.constants[constant as usize]);
Dec 19 05:02:26.229 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 05:02:26.229 INFO [stderr]     |
Dec 19 05:02:26.229 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 05:02:26.229 INFO [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 19 05:02:26.229 INFO [stderr] 
Dec 19 05:02:26.236 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 05:02:26.236 INFO [stderr]    --> src/vm.rs:227:9
Dec 19 05:02:26.236 INFO [stderr]     |
Dec 19 05:02:26.236 INFO [stderr] 227 |         writeln!(self.output, "{}", v);
Dec 19 05:02:26.236 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 05:02:26.236 INFO [stderr]     |
Dec 19 05:02:26.236 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 05:02:26.236 INFO [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 19 05:02:26.236 INFO [stderr] 
Dec 19 05:02:26.236 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 05:02:26.236 INFO [stderr]   --> src/main.rs:38:13
Dec 19 05:02:26.236 INFO [stderr]    |
Dec 19 05:02:26.236 INFO [stderr] 38 |             vm.interpret();
Dec 19 05:02:26.236 INFO [stderr]    |             ^^^^^^^^^^^^^^^
Dec 19 05:02:26.236 INFO [stderr]    |
Dec 19 05:02:26.236 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 05:02:26.236 INFO [stderr] 
Dec 19 05:02:26.276 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 21.50s
Dec 19 05:02:27.758 INFO running `"docker" "inspect" "61730bc1e202f56d69418cf12e4080911ea9bbdb2903a5da63aebeba3361a8cd"`
Dec 19 05:02:28.148 INFO running `"docker" "rm" "-f" "61730bc1e202f56d69418cf12e4080911ea9bbdb2903a5da63aebeba3361a8cd"`
Dec 19 05:02:28.552 INFO [stdout] 61730bc1e202f56d69418cf12e4080911ea9bbdb2903a5da63aebeba3361a8cd