Dec 12 20:19:29.028 INFO testing yiransheng/rust-lox against master#bd47d6825bf4090517549d33cfef10d3300b4a75 for pr-56550
Dec 12 20:19:29.028 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56550/worker-1/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-1/pr-56550/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +bd47d6825bf4090517549d33cfef10d3300b4a75-alt build --frozen" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 12 20:19:29.471 INFO [stdout] 93ec332d2cbad371d048c3b01b26ee9a16638c774c4ef9c6720b9ba218ad517b
Dec 12 20:19:29.473 INFO running `"docker" "start" "-a" "93ec332d2cbad371d048c3b01b26ee9a16638c774c4ef9c6720b9ba218ad517b"`
Dec 12 20:19:30.594 INFO [stderr] usermod: no changes
Dec 12 20:19:30.703 INFO [stderr]    Compiling num-bigint v0.2.0
Dec 12 20:19:30.703 INFO [stderr]    Compiling num-rational v0.2.1
Dec 12 20:19:30.703 INFO [stderr]    Compiling num-complex v0.2.1
Dec 12 20:19:30.703 INFO [stderr]    Compiling num-iter v0.1.37
Dec 12 20:19:30.703 INFO [stderr]    Compiling arraydeque v0.4.3
Dec 12 20:19:30.708 INFO [stderr]    Compiling syn v0.15.9
Dec 12 20:19:41.839 INFO [stderr]    Compiling num v0.2.0
Dec 12 20:19:43.583 INFO [stderr]    Compiling num-derive v0.2.3
Dec 12 20:19:49.035 INFO [stderr]    Compiling loxvm v0.1.0 (/source)
Dec 12 20:19:49.211 INFO [stderr] warning: unused import: `object::*`
Dec 12 20:19:49.211 INFO [stderr]  --> src/compiler.rs:3:5
Dec 12 20:19:49.211 INFO [stderr]   |
Dec 12 20:19:49.211 INFO [stderr] 3 | use object::*;
Dec 12 20:19:49.211 INFO [stderr]   |     ^^^^^^^^^
Dec 12 20:19:49.211 INFO [stderr]   |
Dec 12 20:19:49.211 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 12 20:19:49.211 INFO [stderr] 
Dec 12 20:19:49.215 INFO [stderr] warning: unused import: `Into`
Dec 12 20:19:49.215 INFO [stderr]  --> src/value.rs:2:26
Dec 12 20:19:49.215 INFO [stderr]   |
Dec 12 20:19:49.215 INFO [stderr] 2 | use std::convert::{From, Into};
Dec 12 20:19:49.215 INFO [stderr]   |                          ^^^^
Dec 12 20:19:49.215 INFO [stderr] 
Dec 12 20:19:49.215 INFO [stderr] warning: unused import: `common::*`
Dec 12 20:19:49.215 INFO [stderr]   --> src/main.rs:17:5
Dec 12 20:19:49.215 INFO [stderr]    |
Dec 12 20:19:49.216 INFO [stderr] 17 | use common::*;
Dec 12 20:19:49.216 INFO [stderr]    |     ^^^^^^^^^
Dec 12 20:19:49.216 INFO [stderr] 
Dec 12 20:19:49.216 INFO [stderr] warning: unused import: `scanner::Scanner`
Dec 12 20:19:49.216 INFO [stderr]   --> src/main.rs:19:5
Dec 12 20:19:49.216 INFO [stderr]    |
Dec 12 20:19:49.216 INFO [stderr] 19 | use scanner::Scanner;
Dec 12 20:19:49.216 INFO [stderr]    |     ^^^^^^^^^^^^^^^^
Dec 12 20:19:49.216 INFO [stderr] 
Dec 12 20:19:49.216 INFO [stderr] warning: unused import: `scanner::TokenType`
Dec 12 20:19:49.216 INFO [stderr]   --> src/main.rs:20:5
Dec 12 20:19:49.216 INFO [stderr]    |
Dec 12 20:19:49.216 INFO [stderr] 20 | use scanner::TokenType;
Dec 12 20:19:49.216 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^
Dec 12 20:19:49.216 INFO [stderr] 
Dec 12 20:19:49.595 INFO [stderr] warning: variant is never constructed: `TooManyConstants`
Dec 12 20:19:49.595 INFO [stderr]   --> src/compiler.rs:19:5
Dec 12 20:19:49.595 INFO [stderr]    |
Dec 12 20:19:49.595 INFO [stderr] 19 |     TooManyConstants,
Dec 12 20:19:49.595 INFO [stderr]    |     ^^^^^^^^^^^^^^^^
Dec 12 20:19:49.595 INFO [stderr]    |
Dec 12 20:19:49.595 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 12 20:19:49.595 INFO [stderr] 
Dec 12 20:19:49.597 INFO [stderr] warning: method is never used: `error_at_current`
Dec 12 20:19:49.597 INFO [stderr]    --> src/compiler.rs:361:5
Dec 12 20:19:49.597 INFO [stderr]     |
Dec 12 20:19:49.597 INFO [stderr] 361 |     fn error_at_current(&mut self, message: &str) -> CompileError {
Dec 12 20:19:49.597 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 12 20:19:49.597 INFO [stderr] 
Dec 12 20:19:49.597 INFO [stderr] warning: variant is never constructed: `Function`
Dec 12 20:19:49.597 INFO [stderr]  --> src/object.rs:7:5
Dec 12 20:19:49.597 INFO [stderr]   |
Dec 12 20:19:49.597 INFO [stderr] 7 |     Function,
Dec 12 20:19:49.597 INFO [stderr]   |     ^^^^^^^^
Dec 12 20:19:49.597 INFO [stderr] 
Dec 12 20:19:49.597 INFO [stderr] warning: method is never used: `identifier_equal`
Dec 12 20:19:49.597 INFO [stderr]   --> src/scanner/token.rs:64:5
Dec 12 20:19:49.597 INFO [stderr]    |
Dec 12 20:19:49.597 INFO [stderr] 64 |     pub fn identifier_equal(&self, other: &Token<'a>) -> bool {
Dec 12 20:19:49.597 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 12 20:19:49.597 INFO [stderr] 
Dec 12 20:19:49.597 INFO [stderr] warning: method is never used: `take`
Dec 12 20:19:49.597 INFO [stderr]   --> src/value.rs:43:5
Dec 12 20:19:49.597 INFO [stderr]    |
Dec 12 20:19:49.597 INFO [stderr] 43 |     pub fn take(&mut self) -> Value<O> {
Dec 12 20:19:49.597 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 12 20:19:49.597 INFO [stderr] 
Dec 12 20:19:49.597 INFO [stderr] warning: method is never used: `into_bool`
Dec 12 20:19:49.597 INFO [stderr]   --> src/value.rs:52:5
Dec 12 20:19:49.597 INFO [stderr]    |
Dec 12 20:19:49.597 INFO [stderr] 52 |     pub fn into_bool(self) -> Option<bool> {
Dec 12 20:19:49.597 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 12 20:19:49.597 INFO [stderr] 
Dec 12 20:19:49.599 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 12 20:19:49.599 INFO [stderr]    --> src/chunk.rs:111:13
Dec 12 20:19:49.599 INFO [stderr]     |
Dec 12 20:19:49.599 INFO [stderr] 111 |             write!(write_to, "   | ");
Dec 12 20:19:49.599 INFO [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 12 20:19:49.599 INFO [stderr]     |
Dec 12 20:19:49.599 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Dec 12 20:19:49.599 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 12 20:19:49.599 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 12 20:19:49.599 INFO [stderr] 
Dec 12 20:19:49.599 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 12 20:19:49.599 INFO [stderr]    --> src/chunk.rs:113:13
Dec 12 20:19:49.599 INFO [stderr]     |
Dec 12 20:19:49.599 INFO [stderr] 113 |             write!(write_to, "{:04} ", line_no);
Dec 12 20:19:49.599 INFO [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 12 20:19:49.599 INFO [stderr]     |
Dec 12 20:19:49.599 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 12 20:19:49.599 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 12 20:19:49.599 INFO [stderr] 
Dec 12 20:19:49.599 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 12 20:19:49.599 INFO [stderr]    --> src/chunk.rs:141:17
Dec 12 20:19:49.599 INFO [stderr]     |
Dec 12 20:19:49.599 INFO [stderr] 141 |                 writeln!(write_to, "Unknown OptCode {}", instr);
Dec 12 20:19:49.599 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 12 20:19:49.599 INFO [stderr]     |
Dec 12 20:19:49.599 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 12 20:19:49.599 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 12 20:19:49.599 INFO [stderr] 
Dec 12 20:19:49.599 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 12 20:19:49.599 INFO [stderr]    --> src/chunk.rs:152:9
Dec 12 20:19:49.599 INFO [stderr]     |
Dec 12 20:19:49.599 INFO [stderr] 152 |         writeln!(write_to, "{}", name);
Dec 12 20:19:49.599 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 12 20:19:49.599 INFO [stderr]     |
Dec 12 20:19:49.599 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 12 20:19:49.599 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 12 20:19:49.599 INFO [stderr] 
Dec 12 20:19:49.599 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 12 20:19:49.599 INFO [stderr]    --> src/chunk.rs:163:9
Dec 12 20:19:49.599 INFO [stderr]     |
Dec 12 20:19:49.599 INFO [stderr] 163 |         write!(write_to, "{:<16} {:04} ", name, constant);
Dec 12 20:19:49.599 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 12 20:19:49.599 INFO [stderr]     |
Dec 12 20:19:49.599 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 12 20:19:49.599 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 12 20:19:49.599 INFO [stderr] 
Dec 12 20:19:49.603 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 12 20:19:49.603 INFO [stderr]    --> src/chunk.rs:164:9
Dec 12 20:19:49.603 INFO [stderr]     |
Dec 12 20:19:49.603 INFO [stderr] 164 |         writeln!(write_to, "{}", self.constants[constant as usize]);
Dec 12 20:19:49.603 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 12 20:19:49.603 INFO [stderr]     |
Dec 12 20:19:49.603 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 12 20:19:49.603 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 12 20:19:49.603 INFO [stderr] 
Dec 12 20:19:49.607 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 12 20:19:49.607 INFO [stderr]    --> src/vm.rs:227:9
Dec 12 20:19:49.607 INFO [stderr]     |
Dec 12 20:19:49.607 INFO [stderr] 227 |         writeln!(self.output, "{}", v);
Dec 12 20:19:49.607 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 12 20:19:49.607 INFO [stderr]     |
Dec 12 20:19:49.607 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 12 20:19:49.607 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 12 20:19:49.607 INFO [stderr] 
Dec 12 20:19:49.607 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 12 20:19:49.607 INFO [stderr]   --> src/main.rs:38:13
Dec 12 20:19:49.607 INFO [stderr]    |
Dec 12 20:19:49.607 INFO [stderr] 38 |             vm.interpret();
Dec 12 20:19:49.607 INFO [stderr]    |             ^^^^^^^^^^^^^^^
Dec 12 20:19:49.607 INFO [stderr]    |
Dec 12 20:19:49.607 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 12 20:19:49.607 INFO [stderr] 
Dec 12 20:19:51.218 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 20.60s
Dec 12 20:19:51.223 INFO [stderr] su: No module specific data is present
Dec 12 20:19:52.091 INFO running `"docker" "inspect" "93ec332d2cbad371d048c3b01b26ee9a16638c774c4ef9c6720b9ba218ad517b"`
Dec 12 20:19:52.322 INFO running `"docker" "rm" "-f" "93ec332d2cbad371d048c3b01b26ee9a16638c774c4ef9c6720b9ba218ad517b"`
Dec 12 20:19:52.696 INFO [stdout] 93ec332d2cbad371d048c3b01b26ee9a16638c774c4ef9c6720b9ba218ad517b
Dec 12 20:19:52.698 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56550/worker-1/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-1/pr-56550/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +bd47d6825bf4090517549d33cfef10d3300b4a75-alt test --frozen --no-run" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 12 20:19:53.287 INFO [stdout] 5e42abc28bf5f3d34b5f45641bc3c8c3f76be35cdc3d0f349b830103412b4e84
Dec 12 20:19:53.295 INFO running `"docker" "start" "-a" "5e42abc28bf5f3d34b5f45641bc3c8c3f76be35cdc3d0f349b830103412b4e84"`
Dec 12 20:19:55.254 INFO [stderr] usermod: no changes
Dec 12 20:19:55.380 INFO [stderr]    Compiling loxvm v0.1.0 (/source)
Dec 12 20:19:55.623 INFO [stderr] warning: unused import: `object::*`
Dec 12 20:19:55.623 INFO [stderr]  --> src/compiler.rs:3:5
Dec 12 20:19:55.623 INFO [stderr]   |
Dec 12 20:19:55.623 INFO [stderr] 3 | use object::*;
Dec 12 20:19:55.623 INFO [stderr]   |     ^^^^^^^^^
Dec 12 20:19:55.623 INFO [stderr]   |
Dec 12 20:19:55.623 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 12 20:19:55.623 INFO [stderr] 
Dec 12 20:19:55.623 INFO [stderr] warning: unused import: `Into`
Dec 12 20:19:55.623 INFO [stderr]  --> src/value.rs:2:26
Dec 12 20:19:55.623 INFO [stderr]   |
Dec 12 20:19:55.623 INFO [stderr] 2 | use std::convert::{From, Into};
Dec 12 20:19:55.623 INFO [stderr]   |                          ^^^^
Dec 12 20:19:55.623 INFO [stderr] 
Dec 12 20:19:55.623 INFO [stderr] warning: unused import: `common::*`
Dec 12 20:19:55.623 INFO [stderr]   --> src/main.rs:17:5
Dec 12 20:19:55.623 INFO [stderr]    |
Dec 12 20:19:55.623 INFO [stderr] 17 | use common::*;
Dec 12 20:19:55.623 INFO [stderr]    |     ^^^^^^^^^
Dec 12 20:19:55.623 INFO [stderr] 
Dec 12 20:19:55.623 INFO [stderr] warning: unused import: `scanner::Scanner`
Dec 12 20:19:55.623 INFO [stderr]   --> src/main.rs:19:5
Dec 12 20:19:55.623 INFO [stderr]    |
Dec 12 20:19:55.623 INFO [stderr] 19 | use scanner::Scanner;
Dec 12 20:19:55.623 INFO [stderr]    |     ^^^^^^^^^^^^^^^^
Dec 12 20:19:55.623 INFO [stderr] 
Dec 12 20:19:55.623 INFO [stderr] warning: unused import: `scanner::TokenType`
Dec 12 20:19:55.623 INFO [stderr]   --> src/main.rs:20:5
Dec 12 20:19:55.623 INFO [stderr]    |
Dec 12 20:19:55.623 INFO [stderr] 20 | use scanner::TokenType;
Dec 12 20:19:55.623 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^
Dec 12 20:19:55.623 INFO [stderr] 
Dec 12 20:19:56.087 INFO [stderr] warning: variant is never constructed: `TooManyConstants`
Dec 12 20:19:56.087 INFO [stderr]   --> src/compiler.rs:19:5
Dec 12 20:19:56.087 INFO [stderr]    |
Dec 12 20:19:56.087 INFO [stderr] 19 |     TooManyConstants,
Dec 12 20:19:56.087 INFO [stderr]    |     ^^^^^^^^^^^^^^^^
Dec 12 20:19:56.087 INFO [stderr]    |
Dec 12 20:19:56.087 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 12 20:19:56.087 INFO [stderr] 
Dec 12 20:19:56.087 INFO [stderr] warning: method is never used: `error_at_current`
Dec 12 20:19:56.087 INFO [stderr]    --> src/compiler.rs:361:5
Dec 12 20:19:56.087 INFO [stderr]     |
Dec 12 20:19:56.087 INFO [stderr] 361 |     fn error_at_current(&mut self, message: &str) -> CompileError {
Dec 12 20:19:56.087 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 12 20:19:56.087 INFO [stderr] 
Dec 12 20:19:56.087 INFO [stderr] warning: variant is never constructed: `Function`
Dec 12 20:19:56.087 INFO [stderr]  --> src/object.rs:7:5
Dec 12 20:19:56.087 INFO [stderr]   |
Dec 12 20:19:56.087 INFO [stderr] 7 |     Function,
Dec 12 20:19:56.087 INFO [stderr]   |     ^^^^^^^^
Dec 12 20:19:56.087 INFO [stderr] 
Dec 12 20:19:56.087 INFO [stderr] warning: method is never used: `identifier_equal`
Dec 12 20:19:56.087 INFO [stderr]   --> src/scanner/token.rs:64:5
Dec 12 20:19:56.087 INFO [stderr]    |
Dec 12 20:19:56.087 INFO [stderr] 64 |     pub fn identifier_equal(&self, other: &Token<'a>) -> bool {
Dec 12 20:19:56.087 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 12 20:19:56.087 INFO [stderr] 
Dec 12 20:19:56.087 INFO [stderr] warning: method is never used: `take`
Dec 12 20:19:56.087 INFO [stderr]   --> src/value.rs:43:5
Dec 12 20:19:56.087 INFO [stderr]    |
Dec 12 20:19:56.087 INFO [stderr] 43 |     pub fn take(&mut self) -> Value<O> {
Dec 12 20:19:56.087 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 12 20:19:56.087 INFO [stderr] 
Dec 12 20:19:56.087 INFO [stderr] warning: method is never used: `into_bool`
Dec 12 20:19:56.087 INFO [stderr]   --> src/value.rs:52:5
Dec 12 20:19:56.087 INFO [stderr]    |
Dec 12 20:19:56.087 INFO [stderr] 52 |     pub fn into_bool(self) -> Option<bool> {
Dec 12 20:19:56.087 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 12 20:19:56.087 INFO [stderr] 
Dec 12 20:19:56.087 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 12 20:19:56.087 INFO [stderr]    --> src/chunk.rs:111:13
Dec 12 20:19:56.087 INFO [stderr]     |
Dec 12 20:19:56.087 INFO [stderr] 111 |             write!(write_to, "   | ");
Dec 12 20:19:56.087 INFO [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 12 20:19:56.087 INFO [stderr]     |
Dec 12 20:19:56.087 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Dec 12 20:19:56.087 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 12 20:19:56.087 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 12 20:19:56.087 INFO [stderr] 
Dec 12 20:19:56.087 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 12 20:19:56.087 INFO [stderr]    --> src/chunk.rs:113:13
Dec 12 20:19:56.087 INFO [stderr]     |
Dec 12 20:19:56.087 INFO [stderr] 113 |             write!(write_to, "{:04} ", line_no);
Dec 12 20:19:56.087 INFO [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 12 20:19:56.087 INFO [stderr]     |
Dec 12 20:19:56.087 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 12 20:19:56.087 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 12 20:19:56.087 INFO [stderr] 
Dec 12 20:19:56.087 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 12 20:19:56.087 INFO [stderr]    --> src/chunk.rs:141:17
Dec 12 20:19:56.087 INFO [stderr]     |
Dec 12 20:19:56.087 INFO [stderr] 141 |                 writeln!(write_to, "Unknown OptCode {}", instr);
Dec 12 20:19:56.087 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 12 20:19:56.087 INFO [stderr]     |
Dec 12 20:19:56.087 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 12 20:19:56.087 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 12 20:19:56.087 INFO [stderr] 
Dec 12 20:19:56.087 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 12 20:19:56.087 INFO [stderr]    --> src/chunk.rs:152:9
Dec 12 20:19:56.087 INFO [stderr]     |
Dec 12 20:19:56.087 INFO [stderr] 152 |         writeln!(write_to, "{}", name);
Dec 12 20:19:56.087 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 12 20:19:56.087 INFO [stderr]     |
Dec 12 20:19:56.087 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 12 20:19:56.087 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 12 20:19:56.087 INFO [stderr] 
Dec 12 20:19:56.087 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 12 20:19:56.087 INFO [stderr]    --> src/chunk.rs:163:9
Dec 12 20:19:56.087 INFO [stderr]     |
Dec 12 20:19:56.087 INFO [stderr] 163 |         write!(write_to, "{:<16} {:04} ", name, constant);
Dec 12 20:19:56.087 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 12 20:19:56.087 INFO [stderr]     |
Dec 12 20:19:56.087 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 12 20:19:56.087 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 12 20:19:56.087 INFO [stderr] 
Dec 12 20:19:56.088 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 12 20:19:56.088 INFO [stderr]    --> src/chunk.rs:164:9
Dec 12 20:19:56.088 INFO [stderr]     |
Dec 12 20:19:56.088 INFO [stderr] 164 |         writeln!(write_to, "{}", self.constants[constant as usize]);
Dec 12 20:19:56.088 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 12 20:19:56.088 INFO [stderr]     |
Dec 12 20:19:56.088 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 12 20:19:56.088 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 12 20:19:56.088 INFO [stderr] 
Dec 12 20:19:56.099 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 12 20:19:56.099 INFO [stderr]    --> src/vm.rs:227:9
Dec 12 20:19:56.099 INFO [stderr]     |
Dec 12 20:19:56.099 INFO [stderr] 227 |         writeln!(self.output, "{}", v);
Dec 12 20:19:56.099 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 12 20:19:56.099 INFO [stderr]     |
Dec 12 20:19:56.099 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 12 20:19:56.099 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 12 20:19:56.099 INFO [stderr] 
Dec 12 20:19:56.099 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 12 20:19:56.099 INFO [stderr]   --> src/main.rs:38:13
Dec 12 20:19:56.099 INFO [stderr]    |
Dec 12 20:19:56.099 INFO [stderr] 38 |             vm.interpret();
Dec 12 20:19:56.099 INFO [stderr]    |             ^^^^^^^^^^^^^^^
Dec 12 20:19:56.099 INFO [stderr]    |
Dec 12 20:19:56.099 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 12 20:19:56.099 INFO [stderr] 
Dec 12 20:19:56.664 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.37s
Dec 12 20:19:56.668 INFO [stderr] su: No module specific data is present
Dec 12 20:19:57.682 INFO running `"docker" "inspect" "5e42abc28bf5f3d34b5f45641bc3c8c3f76be35cdc3d0f349b830103412b4e84"`
Dec 12 20:19:58.001 INFO running `"docker" "rm" "-f" "5e42abc28bf5f3d34b5f45641bc3c8c3f76be35cdc3d0f349b830103412b4e84"`
Dec 12 20:19:58.279 INFO [stdout] 5e42abc28bf5f3d34b5f45641bc3c8c3f76be35cdc3d0f349b830103412b4e84
Dec 12 20:19:58.285 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56550/worker-1/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-1/pr-56550/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +bd47d6825bf4090517549d33cfef10d3300b4a75-alt test --frozen" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 12 20:19:58.667 INFO [stdout] 1c90131acfb07d51e9c26daa9d95f680284c1d23df516b5e55a656ea255d8448
Dec 12 20:19:58.669 INFO running `"docker" "start" "-a" "1c90131acfb07d51e9c26daa9d95f680284c1d23df516b5e55a656ea255d8448"`
Dec 12 20:20:00.967 INFO [stderr] usermod: no changes
Dec 12 20:20:01.067 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.06s
Dec 12 20:20:01.067 INFO [stderr]      Running /target/debug/deps/loxvm-7c552b2d55b75a11
Dec 12 20:20:01.071 INFO [stdout] 
Dec 12 20:20:01.071 INFO [stdout] running 3 tests
Dec 12 20:20:01.071 INFO [stdout] test scanner::keyword::tests::test_non_keywords ... ok
Dec 12 20:20:01.071 INFO [stdout] test scanner::keyword::tests::test_start_with_keyword ... ok
Dec 12 20:20:01.071 INFO [stdout] test scanner::keyword::tests::test_all_keywords ... ok
Dec 12 20:20:01.071 INFO [stdout] 
Dec 12 20:20:01.071 INFO [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Dec 12 20:20:01.071 INFO [stdout] 
Dec 12 20:20:01.075 INFO [stderr] su: No module specific data is present
Dec 12 20:20:02.358 INFO running `"docker" "inspect" "1c90131acfb07d51e9c26daa9d95f680284c1d23df516b5e55a656ea255d8448"`
Dec 12 20:20:02.665 INFO running `"docker" "rm" "-f" "1c90131acfb07d51e9c26daa9d95f680284c1d23df516b5e55a656ea255d8448"`
Dec 12 20:20:03.087 INFO [stdout] 1c90131acfb07d51e9c26daa9d95f680284c1d23df516b5e55a656ea255d8448