Dec 19 12:11:41.433 INFO checking museun/rcc against try#e70472fc501b855c9080f3772432c10fe20b8866 for pr-56955
Dec 19 12:11:41.433 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-5/try#e70472fc501b855c9080f3772432c10fe20b8866:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/try#e70472fc501b855c9080f3772432c10fe20b8866/gh/museun/rcc:/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" "+e70472fc501b855c9080f3772432c10fe20b8866-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 19 12:11:41.861 INFO [stdout] 12518e0a525d9bc14fbb31e3078aa2906676a165547eee6d045164cfd1d9579b
Dec 19 12:11:41.928 INFO running `"docker" "start" "-a" "12518e0a525d9bc14fbb31e3078aa2906676a165547eee6d045164cfd1d9579b"`
Dec 19 12:11:43.347 INFO [stderr]    Compiling rcc v0.1.0 (/opt/crater/workdir)
Dec 19 12:11:43.584 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:43.584 INFO [stderr]   --> build.rs:35:5
Dec 19 12:11:43.584 INFO [stderr]    |
Dec 19 12:11:43.584 INFO [stderr] 35 | /     writeln!(
Dec 19 12:11:43.584 INFO [stderr] 36 | |         f,
Dec 19 12:11:43.584 INFO [stderr] 37 | |         r###"#[test]
Dec 19 12:11:43.584 INFO [stderr] 38 | | fn test_{:04}() {{
Dec 19 12:11:43.584 INFO [stderr] ...  |
Dec 19 12:11:43.584 INFO [stderr] 46 | |         n, source, expected, n, n
Dec 19 12:11:43.584 INFO [stderr] 47 | |     );
Dec 19 12:11:43.584 INFO [stderr]    | |______^
Dec 19 12:11:43.584 INFO [stderr]    |
Dec 19 12:11:43.584 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 19 12:11:43.584 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:43.584 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 12:11:43.584 INFO [stderr] 
Dec 19 12:11:43.584 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:43.584 INFO [stderr]   --> build.rs:77:5
Dec 19 12:11:43.584 INFO [stderr]    |
Dec 19 12:11:43.584 INFO [stderr] 77 |     write!(f, "{}", "// nothing to see here");
Dec 19 12:11:43.584 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:43.584 INFO [stderr]    |
Dec 19 12:11:43.584 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:43.584 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 12:11:43.585 INFO [stderr] 
Dec 19 12:11:44.153 INFO [stderr] warning: unknown lint: `cyclomatic_complexity`
Dec 19 12:11:44.153 INFO [stderr]  --> src/semantics.rs:1:10
Dec 19 12:11:44.153 INFO [stderr]   |
Dec 19 12:11:44.153 INFO [stderr] 1 | #![allow(cyclomatic_complexity)]
Dec 19 12:11:44.153 INFO [stderr]   |          ^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:44.153 INFO [stderr]   |
Dec 19 12:11:44.153 INFO [stderr]   = note: #[warn(unknown_lints)] on by default
Dec 19 12:11:44.153 INFO [stderr] 
Dec 19 12:11:44.193 INFO [stderr] warning: unknown lint: `cyclomatic_complexity`
Dec 19 12:11:44.193 INFO [stderr]  --> src/semantics.rs:1:10
Dec 19 12:11:44.193 INFO [stderr]   |
Dec 19 12:11:44.193 INFO [stderr] 1 | #![allow(cyclomatic_complexity)]
Dec 19 12:11:44.193 INFO [stderr]   |          ^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:44.193 INFO [stderr]   |
Dec 19 12:11:44.193 INFO [stderr]   = note: #[warn(unknown_lints)] on by default
Dec 19 12:11:44.193 INFO [stderr] 
Dec 19 12:11:47.158 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.160 INFO [stderr]   --> src/codegen.rs:19:5
Dec 19 12:11:47.160 INFO [stderr]    |
Dec 19 12:11:47.160 INFO [stderr] 19 |     writeln!(&mut buf, ".intel_syntax noprefix");
Dec 19 12:11:47.161 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.161 INFO [stderr]    |
Dec 19 12:11:47.161 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 19 12:11:47.161 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.162 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 12:11:47.162 INFO [stderr] 
Dec 19 12:11:47.162 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.162 INFO [stderr]   --> src/codegen.rs:21:5
Dec 19 12:11:47.163 INFO [stderr]    |
Dec 19 12:11:47.163 INFO [stderr] 21 |     writeln!(&mut buf, ".data");
Dec 19 12:11:47.163 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.164 INFO [stderr]    |
Dec 19 12:11:47.164 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.164 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 12:11:47.164 INFO [stderr] 
Dec 19 12:11:47.165 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.165 INFO [stderr]   --> src/codegen.rs:27:13
Dec 19 12:11:47.165 INFO [stderr]    |
Dec 19 12:11:47.165 INFO [stderr] 27 |             writeln!(&mut buf, "{}:", &name);
Dec 19 12:11:47.166 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.166 INFO [stderr]    |
Dec 19 12:11:47.166 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.167 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 12:11:47.167 INFO [stderr] 
Dec 19 12:11:47.167 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.167 INFO [stderr]   --> src/codegen.rs:28:13
Dec 19 12:11:47.167 INFO [stderr]    |
Dec 19 12:11:47.168 INFO [stderr] 28 |             writeln!(&mut buf, "  .ascii \"{}\"", escape(&data));
Dec 19 12:11:47.168 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.168 INFO [stderr]    |
Dec 19 12:11:47.169 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.169 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 12:11:47.169 INFO [stderr] 
Dec 19 12:11:47.169 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.170 INFO [stderr]   --> src/codegen.rs:32:5
Dec 19 12:11:47.170 INFO [stderr]    |
Dec 19 12:11:47.170 INFO [stderr] 32 |     writeln!(&mut buf, ".text");
Dec 19 12:11:47.171 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.171 INFO [stderr]    |
Dec 19 12:11:47.171 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.171 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 12:11:47.172 INFO [stderr] 
Dec 19 12:11:47.172 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.172 INFO [stderr]   --> src/codegen.rs:46:5
Dec 19 12:11:47.172 INFO [stderr]    |
Dec 19 12:11:47.173 INFO [stderr] 46 |     writeln!(buf, ".global {}", func.name);
Dec 19 12:11:47.173 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.173 INFO [stderr]    |
Dec 19 12:11:47.173 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.174 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 12:11:47.174 INFO [stderr] 
Dec 19 12:11:47.174 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.174 INFO [stderr]   --> src/codegen.rs:47:5
Dec 19 12:11:47.175 INFO [stderr]    |
Dec 19 12:11:47.175 INFO [stderr] 47 |     writeln!(buf, "{}:", func.name);
Dec 19 12:11:47.175 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.175 INFO [stderr]    |
Dec 19 12:11:47.176 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.176 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 12:11:47.180 INFO [stderr] 
Dec 19 12:11:47.180 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.180 INFO [stderr]   --> src/codegen.rs:49:5
Dec 19 12:11:47.180 INFO [stderr]    |
Dec 19 12:11:47.180 INFO [stderr] 49 |     writeln!(buf, "  push rbp");
Dec 19 12:11:47.180 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.180 INFO [stderr]    |
Dec 19 12:11:47.180 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.180 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 12:11:47.180 INFO [stderr] 
Dec 19 12:11:47.180 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.180 INFO [stderr]   --> src/codegen.rs:50:5
Dec 19 12:11:47.180 INFO [stderr]    |
Dec 19 12:11:47.180 INFO [stderr] 50 |     writeln!(buf, "  mov rbp, rsp");
Dec 19 12:11:47.180 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.180 INFO [stderr]    |
Dec 19 12:11:47.180 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.180 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 12:11:47.180 INFO [stderr] 
Dec 19 12:11:47.180 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.180 INFO [stderr]   --> src/codegen.rs:51:5
Dec 19 12:11:47.180 INFO [stderr]    |
Dec 19 12:11:47.180 INFO [stderr] 51 |     writeln!(buf, "  sub rsp, {}", round(func.stacksize, 16));
Dec 19 12:11:47.180 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.180 INFO [stderr]    |
Dec 19 12:11:47.180 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.180 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 12:11:47.180 INFO [stderr] 
Dec 19 12:11:47.180 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.180 INFO [stderr]   --> src/codegen.rs:74:9
Dec 19 12:11:47.180 INFO [stderr]    |
Dec 19 12:11:47.180 INFO [stderr] 74 |         writeln!(buf, "  push {}", r);
Dec 19 12:11:47.180 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.180 INFO [stderr]    |
Dec 19 12:11:47.180 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.180 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 12:11:47.180 INFO [stderr] 
Dec 19 12:11:47.180 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.180 INFO [stderr]   --> src/codegen.rs:83:17
Dec 19 12:11:47.180 INFO [stderr]    |
Dec 19 12:11:47.180 INFO [stderr] 83 |                 writeln!(buf, "  mov {}, {}", REGS64[*reg as usize], val);
Dec 19 12:11:47.180 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.180 INFO [stderr]    |
Dec 19 12:11:47.180 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.180 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 12:11:47.180 INFO [stderr] 
Dec 19 12:11:47.180 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.180 INFO [stderr]   --> src/codegen.rs:87:17
Dec 19 12:11:47.180 INFO [stderr]    |
Dec 19 12:11:47.180 INFO [stderr] 87 | /                 writeln!(
Dec 19 12:11:47.180 INFO [stderr] 88 | |                     buf,
Dec 19 12:11:47.180 INFO [stderr] 89 | |                     "  mov {}, {}",
Dec 19 12:11:47.180 INFO [stderr] 90 | |                     REGS64[*dst as usize], REGS64[*src as usize]
Dec 19 12:11:47.180 INFO [stderr] 91 | |                 );
Dec 19 12:11:47.180 INFO [stderr]    | |__________________^
Dec 19 12:11:47.180 INFO [stderr]    |
Dec 19 12:11:47.180 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.180 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 12:11:47.180 INFO [stderr] 
Dec 19 12:11:47.181 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.181 INFO [stderr]   --> src/codegen.rs:95:17
Dec 19 12:11:47.181 INFO [stderr]    |
Dec 19 12:11:47.181 INFO [stderr] 95 |                 writeln!(buf, "  mov rax, {}", REGS64[*src as usize]);
Dec 19 12:11:47.181 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.181 INFO [stderr]    |
Dec 19 12:11:47.181 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.181 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 12:11:47.181 INFO [stderr] 
Dec 19 12:11:47.181 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.181 INFO [stderr]   --> src/codegen.rs:96:17
Dec 19 12:11:47.181 INFO [stderr]    |
Dec 19 12:11:47.181 INFO [stderr] 96 |                 writeln!(buf, "  jmp {}", ret);
Dec 19 12:11:47.181 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.181 INFO [stderr]    |
Dec 19 12:11:47.181 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.181 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 12:11:47.181 INFO [stderr] 
Dec 19 12:11:47.181 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.181 INFO [stderr]    --> src/codegen.rs:100:17
Dec 19 12:11:47.181 INFO [stderr]     |
Dec 19 12:11:47.181 INFO [stderr] 100 | /                 writeln!(
Dec 19 12:11:47.181 INFO [stderr] 101 | |                     buf,
Dec 19 12:11:47.181 INFO [stderr] 102 | |                     "  mov {}, [{}]",
Dec 19 12:11:47.181 INFO [stderr] 103 | |                     match w {
Dec 19 12:11:47.181 INFO [stderr] ...   |
Dec 19 12:11:47.181 INFO [stderr] 108 | |                     REGS64[*src as usize]
Dec 19 12:11:47.181 INFO [stderr] 109 | |                 );
Dec 19 12:11:47.181 INFO [stderr]     | |__________________^
Dec 19 12:11:47.181 INFO [stderr]     |
Dec 19 12:11:47.181 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.181 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 12:11:47.181 INFO [stderr] 
Dec 19 12:11:47.181 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.181 INFO [stderr]    --> src/codegen.rs:112:21
Dec 19 12:11:47.181 INFO [stderr]     |
Dec 19 12:11:47.181 INFO [stderr] 112 | /                     writeln!(
Dec 19 12:11:47.181 INFO [stderr] 113 | |                         buf,
Dec 19 12:11:47.181 INFO [stderr] 114 | |                         "  movzx {}, {}",
Dec 19 12:11:47.181 INFO [stderr] 115 | |                         REGS64[*dst as usize], REGS8[*dst as usize]
Dec 19 12:11:47.181 INFO [stderr] 116 | |                     );
Dec 19 12:11:47.181 INFO [stderr]     | |______________________^
Dec 19 12:11:47.181 INFO [stderr]     |
Dec 19 12:11:47.181 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.181 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 12:11:47.181 INFO [stderr] 
Dec 19 12:11:47.181 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.181 INFO [stderr]    --> src/codegen.rs:121:17
Dec 19 12:11:47.181 INFO [stderr]     |
Dec 19 12:11:47.181 INFO [stderr] 121 | /                 writeln!(
Dec 19 12:11:47.181 INFO [stderr] 122 | |                     buf,
Dec 19 12:11:47.181 INFO [stderr] 123 | |                     "  mov [{}], {}",
Dec 19 12:11:47.181 INFO [stderr] 124 | |                     REGS64[*dst as usize],
Dec 19 12:11:47.181 INFO [stderr] ...   |
Dec 19 12:11:47.181 INFO [stderr] 129 | |                     },
Dec 19 12:11:47.181 INFO [stderr] 130 | |                 );
Dec 19 12:11:47.181 INFO [stderr]     | |__________________^
Dec 19 12:11:47.181 INFO [stderr]     |
Dec 19 12:11:47.181 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.181 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 12:11:47.181 INFO [stderr] 
Dec 19 12:11:47.181 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.181 INFO [stderr]    --> src/codegen.rs:134:17
Dec 19 12:11:47.181 INFO [stderr]     |
Dec 19 12:11:47.181 INFO [stderr] 134 | /                 writeln!(
Dec 19 12:11:47.181 INFO [stderr] 135 | |                     buf,
Dec 19 12:11:47.181 INFO [stderr] 136 | |                     "  mov [rbp-{}], {}",
Dec 19 12:11:47.181 INFO [stderr] 137 | |                     val,
Dec 19 12:11:47.181 INFO [stderr] ...   |
Dec 19 12:11:47.181 INFO [stderr] 142 | |                     },
Dec 19 12:11:47.181 INFO [stderr] 143 | |                 );
Dec 19 12:11:47.181 INFO [stderr]     | |__________________^
Dec 19 12:11:47.181 INFO [stderr]     |
Dec 19 12:11:47.181 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.181 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 12:11:47.181 INFO [stderr] 
Dec 19 12:11:47.181 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.181 INFO [stderr]    --> src/codegen.rs:147:17
Dec 19 12:11:47.181 INFO [stderr]     |
Dec 19 12:11:47.181 INFO [stderr] 147 |                 writeln!(buf, ".L{}:", val);
Dec 19 12:11:47.181 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.181 INFO [stderr]     |
Dec 19 12:11:47.181 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.181 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 12:11:47.181 INFO [stderr] 
Dec 19 12:11:47.181 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.181 INFO [stderr]    --> src/codegen.rs:151:17
Dec 19 12:11:47.181 INFO [stderr]     |
Dec 19 12:11:47.181 INFO [stderr] 151 |                 writeln!(buf, "  lea {}, {}", REGS64[*reg as usize], label);
Dec 19 12:11:47.182 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.182 INFO [stderr]     |
Dec 19 12:11:47.182 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.182 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 12:11:47.182 INFO [stderr] 
Dec 19 12:11:47.182 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.182 INFO [stderr]    --> src/codegen.rs:155:17
Dec 19 12:11:47.182 INFO [stderr]     |
Dec 19 12:11:47.182 INFO [stderr] 155 |                 writeln!(buf, "  cmp {}, 0", REGS64[*reg as usize]);
Dec 19 12:11:47.182 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.182 INFO [stderr]     |
Dec 19 12:11:47.182 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.182 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 12:11:47.182 INFO [stderr] 
Dec 19 12:11:47.182 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.182 INFO [stderr]    --> src/codegen.rs:156:17
Dec 19 12:11:47.182 INFO [stderr]     |
Dec 19 12:11:47.182 INFO [stderr] 156 |                 writeln!(buf, "  je .L{}", val);
Dec 19 12:11:47.182 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.182 INFO [stderr]     |
Dec 19 12:11:47.182 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.182 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 12:11:47.182 INFO [stderr] 
Dec 19 12:11:47.182 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.182 INFO [stderr]    --> src/codegen.rs:160:17
Dec 19 12:11:47.182 INFO [stderr]     |
Dec 19 12:11:47.182 INFO [stderr] 160 |                 writeln!(buf, "  jmp .L{}", val);
Dec 19 12:11:47.182 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.182 INFO [stderr]     |
Dec 19 12:11:47.182 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.182 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 12:11:47.182 INFO [stderr] 
Dec 19 12:11:47.182 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.182 INFO [stderr]    --> src/codegen.rs:164:17
Dec 19 12:11:47.182 INFO [stderr]     |
Dec 19 12:11:47.182 INFO [stderr] 164 | /                 writeln!(
Dec 19 12:11:47.182 INFO [stderr] 165 | |                     buf,
Dec 19 12:11:47.182 INFO [stderr] 166 | |                     "  or {},{}",
Dec 19 12:11:47.182 INFO [stderr] 167 | |                     REGS64[*dst as usize], REGS64[*src as usize]
Dec 19 12:11:47.182 INFO [stderr] 168 | |                 );
Dec 19 12:11:47.182 INFO [stderr]     | |__________________^
Dec 19 12:11:47.182 INFO [stderr]     |
Dec 19 12:11:47.182 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.182 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 12:11:47.182 INFO [stderr] 
Dec 19 12:11:47.182 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.182 INFO [stderr]    --> src/codegen.rs:172:17
Dec 19 12:11:47.182 INFO [stderr]     |
Dec 19 12:11:47.182 INFO [stderr] 172 | /                 writeln!(
Dec 19 12:11:47.182 INFO [stderr] 173 | |                     buf,
Dec 19 12:11:47.182 INFO [stderr] 174 | |                     "  xor {},{}",
Dec 19 12:11:47.182 INFO [stderr] 175 | |                     REGS64[*dst as usize], REGS64[*src as usize]
Dec 19 12:11:47.182 INFO [stderr] 176 | |                 );
Dec 19 12:11:47.182 INFO [stderr]     | |__________________^
Dec 19 12:11:47.182 INFO [stderr]     |
Dec 19 12:11:47.182 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.182 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 12:11:47.182 INFO [stderr] 
Dec 19 12:11:47.182 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.182 INFO [stderr]    --> src/codegen.rs:180:17
Dec 19 12:11:47.182 INFO [stderr]     |
Dec 19 12:11:47.182 INFO [stderr] 180 | /                 writeln!(
Dec 19 12:11:47.182 INFO [stderr] 181 | |                     buf,
Dec 19 12:11:47.182 INFO [stderr] 182 | |                     "  xor {},{}",
Dec 19 12:11:47.182 INFO [stderr] 183 | |                     REGS64[*reg as usize], val
Dec 19 12:11:47.182 INFO [stderr] 184 | |                 );
Dec 19 12:11:47.182 INFO [stderr]     | |__________________^
Dec 19 12:11:47.182 INFO [stderr]     |
Dec 19 12:11:47.182 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.182 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 12:11:47.182 INFO [stderr] 
Dec 19 12:11:47.182 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.182 INFO [stderr]    --> src/codegen.rs:188:17
Dec 19 12:11:47.182 INFO [stderr]     |
Dec 19 12:11:47.182 INFO [stderr] 188 | /                 writeln!(
Dec 19 12:11:47.182 INFO [stderr] 189 | |                     buf,
Dec 19 12:11:47.182 INFO [stderr] 190 | |                     "  and {},{}",
Dec 19 12:11:47.182 INFO [stderr] 191 | |                     REGS64[*dst as usize], REGS64[*src as usize]
Dec 19 12:11:47.182 INFO [stderr] 192 | |                 );
Dec 19 12:11:47.182 INFO [stderr]     | |__________________^
Dec 19 12:11:47.182 INFO [stderr]     |
Dec 19 12:11:47.182 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.182 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 12:11:47.182 INFO [stderr] 
Dec 19 12:11:47.182 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.182 INFO [stderr]    --> src/codegen.rs:196:17
Dec 19 12:11:47.182 INFO [stderr]     |
Dec 19 12:11:47.182 INFO [stderr] 196 |                 writeln!(buf, "  cmp {}, 0", REGS64[*reg as usize]);
Dec 19 12:11:47.182 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.182 INFO [stderr]     |
Dec 19 12:11:47.183 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.183 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 12:11:47.183 INFO [stderr] 
Dec 19 12:11:47.183 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.183 INFO [stderr]    --> src/codegen.rs:197:17
Dec 19 12:11:47.183 INFO [stderr]     |
Dec 19 12:11:47.183 INFO [stderr] 197 |                 writeln!(buf, "  jne .L{}", val);
Dec 19 12:11:47.183 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.183 INFO [stderr]     |
Dec 19 12:11:47.183 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.183 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 12:11:47.183 INFO [stderr] 
Dec 19 12:11:47.183 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.183 INFO [stderr]    --> src/codegen.rs:201:17
Dec 19 12:11:47.183 INFO [stderr]     |
Dec 19 12:11:47.183 INFO [stderr] 201 |                 writeln!(buf, "  lea {}, [rbp-{}]", REGS64[*reg as usize], val);
Dec 19 12:11:47.183 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.183 INFO [stderr]     |
Dec 19 12:11:47.183 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.183 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 12:11:47.183 INFO [stderr] 
Dec 19 12:11:47.183 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.183 INFO [stderr]    --> src/codegen.rs:205:17
Dec 19 12:11:47.183 INFO [stderr]     |
Dec 19 12:11:47.183 INFO [stderr] 205 | /                 writeln!(
Dec 19 12:11:47.183 INFO [stderr] 206 | |                     buf,
Dec 19 12:11:47.183 INFO [stderr] 207 | |                     "  add {}, {}",
Dec 19 12:11:47.183 INFO [stderr] 208 | |                     REGS64[*dst as usize], REGS64[*src as usize]
Dec 19 12:11:47.183 INFO [stderr] 209 | |                 );
Dec 19 12:11:47.183 INFO [stderr]     | |__________________^
Dec 19 12:11:47.183 INFO [stderr]     |
Dec 19 12:11:47.183 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.183 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 12:11:47.183 INFO [stderr] 
Dec 19 12:11:47.183 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.183 INFO [stderr]    --> src/codegen.rs:213:17
Dec 19 12:11:47.183 INFO [stderr]     |
Dec 19 12:11:47.183 INFO [stderr] 213 |                 writeln!(buf, "  add {}, {}", REGS64[*reg as usize], val);
Dec 19 12:11:47.183 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.183 INFO [stderr]     |
Dec 19 12:11:47.183 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.183 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 12:11:47.183 INFO [stderr] 
Dec 19 12:11:47.183 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.183 INFO [stderr]    --> src/codegen.rs:217:17
Dec 19 12:11:47.183 INFO [stderr]     |
Dec 19 12:11:47.183 INFO [stderr] 217 | /                 writeln!(
Dec 19 12:11:47.183 INFO [stderr] 218 | |                     buf,
Dec 19 12:11:47.183 INFO [stderr] 219 | |                     "  sub {}, {}",
Dec 19 12:11:47.183 INFO [stderr] 220 | |                     REGS64[*dst as usize], REGS64[*src as usize]
Dec 19 12:11:47.183 INFO [stderr] 221 | |                 );
Dec 19 12:11:47.183 INFO [stderr]     | |__________________^
Dec 19 12:11:47.183 INFO [stderr]     |
Dec 19 12:11:47.183 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.183 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 12:11:47.183 INFO [stderr] 
Dec 19 12:11:47.183 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.183 INFO [stderr]    --> src/codegen.rs:225:17
Dec 19 12:11:47.183 INFO [stderr]     |
Dec 19 12:11:47.183 INFO [stderr] 225 |                 writeln!(buf, "  sub {}, {}", REGS64[*reg as usize], val);
Dec 19 12:11:47.183 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.183 INFO [stderr]     |
Dec 19 12:11:47.183 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.183 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 12:11:47.183 INFO [stderr] 
Dec 19 12:11:47.183 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.183 INFO [stderr]    --> src/codegen.rs:230:17
Dec 19 12:11:47.183 INFO [stderr]     |
Dec 19 12:11:47.183 INFO [stderr] 230 |                 writeln!(buf, "  mov rax, {}", REGS64[*src as usize]);
Dec 19 12:11:47.183 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.183 INFO [stderr]     |
Dec 19 12:11:47.183 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.183 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 12:11:47.183 INFO [stderr] 
Dec 19 12:11:47.183 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.183 INFO [stderr]    --> src/codegen.rs:231:17
Dec 19 12:11:47.183 INFO [stderr]     |
Dec 19 12:11:47.183 INFO [stderr] 231 |                 writeln!(buf, "  mul {}", REGS64[*dst as usize]);
Dec 19 12:11:47.183 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.183 INFO [stderr]     |
Dec 19 12:11:47.183 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.183 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 12:11:47.183 INFO [stderr] 
Dec 19 12:11:47.183 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.183 INFO [stderr]    --> src/codegen.rs:232:17
Dec 19 12:11:47.183 INFO [stderr]     |
Dec 19 12:11:47.183 INFO [stderr] 232 |                 writeln!(buf, "  mov {}, rax", REGS64[*dst as usize]);
Dec 19 12:11:47.183 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.183 INFO [stderr]     |
Dec 19 12:11:47.184 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.184 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 12:11:47.184 INFO [stderr] 
Dec 19 12:11:47.184 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.184 INFO [stderr]    --> src/codegen.rs:236:17
Dec 19 12:11:47.184 INFO [stderr]     |
Dec 19 12:11:47.184 INFO [stderr] 236 |                 writeln!(buf, "  mov rax, {}", val);
Dec 19 12:11:47.184 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.184 INFO [stderr]     |
Dec 19 12:11:47.184 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.184 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 12:11:47.184 INFO [stderr] 
Dec 19 12:11:47.184 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.184 INFO [stderr]    --> src/codegen.rs:237:17
Dec 19 12:11:47.184 INFO [stderr]     |
Dec 19 12:11:47.184 INFO [stderr] 237 |                 writeln!(buf, "  mul {}", REGS64[*reg as usize]);
Dec 19 12:11:47.184 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.184 INFO [stderr]     |
Dec 19 12:11:47.184 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.184 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 12:11:47.184 INFO [stderr] 
Dec 19 12:11:47.184 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.184 INFO [stderr]    --> src/codegen.rs:238:17
Dec 19 12:11:47.184 INFO [stderr]     |
Dec 19 12:11:47.184 INFO [stderr] 238 |                 writeln!(buf, "  mov {}, rax", REGS64[*reg as usize]);
Dec 19 12:11:47.184 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.184 INFO [stderr]     |
Dec 19 12:11:47.184 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.184 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 12:11:47.184 INFO [stderr] 
Dec 19 12:11:47.184 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.184 INFO [stderr]    --> src/codegen.rs:242:17
Dec 19 12:11:47.184 INFO [stderr]     |
Dec 19 12:11:47.184 INFO [stderr] 242 |                 writeln!(buf, "  mov rax, {}", REGS64[*dst as usize]);
Dec 19 12:11:47.184 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.184 INFO [stderr]     |
Dec 19 12:11:47.184 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.184 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 12:11:47.184 INFO [stderr] 
Dec 19 12:11:47.184 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.184 INFO [stderr]    --> src/codegen.rs:243:17
Dec 19 12:11:47.184 INFO [stderr]     |
Dec 19 12:11:47.184 INFO [stderr] 243 |                 writeln!(buf, "  cqo");
Dec 19 12:11:47.184 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.184 INFO [stderr]     |
Dec 19 12:11:47.184 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.184 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 12:11:47.184 INFO [stderr] 
Dec 19 12:11:47.184 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.184 INFO [stderr]    --> src/codegen.rs:244:17
Dec 19 12:11:47.184 INFO [stderr]     |
Dec 19 12:11:47.184 INFO [stderr] 244 |                 writeln!(buf, "  div {}", REGS64[*src as usize]);
Dec 19 12:11:47.184 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.184 INFO [stderr]     |
Dec 19 12:11:47.184 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.184 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 12:11:47.184 INFO [stderr] 
Dec 19 12:11:47.184 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.184 INFO [stderr]    --> src/codegen.rs:245:17
Dec 19 12:11:47.184 INFO [stderr]     |
Dec 19 12:11:47.184 INFO [stderr] 245 |                 writeln!(buf, "  mov {}, rax", REGS64[*dst as usize]);
Dec 19 12:11:47.184 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.184 INFO [stderr]     |
Dec 19 12:11:47.184 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.184 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 12:11:47.184 INFO [stderr] 
Dec 19 12:11:47.184 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.184 INFO [stderr]    --> src/codegen.rs:249:17
Dec 19 12:11:47.184 INFO [stderr]     |
Dec 19 12:11:47.184 INFO [stderr] 249 |                 writeln!(buf, "  mov rax, {}", REGS64[*dst as usize]);
Dec 19 12:11:47.184 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.184 INFO [stderr]     |
Dec 19 12:11:47.184 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.184 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 12:11:47.184 INFO [stderr] 
Dec 19 12:11:47.184 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.184 INFO [stderr]    --> src/codegen.rs:250:17
Dec 19 12:11:47.184 INFO [stderr]     |
Dec 19 12:11:47.184 INFO [stderr] 250 |                 writeln!(buf, "  cqo");
Dec 19 12:11:47.184 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.184 INFO [stderr]     |
Dec 19 12:11:47.184 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.184 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 12:11:47.184 INFO [stderr] 
Dec 19 12:11:47.185 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.185 INFO [stderr]    --> src/codegen.rs:251:17
Dec 19 12:11:47.185 INFO [stderr]     |
Dec 19 12:11:47.185 INFO [stderr] 251 |                 writeln!(buf, "  div {}", REGS64[*src as usize]);
Dec 19 12:11:47.185 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.185 INFO [stderr]     |
Dec 19 12:11:47.185 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.185 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 12:11:47.185 INFO [stderr] 
Dec 19 12:11:47.185 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.185 INFO [stderr]    --> src/codegen.rs:252:17
Dec 19 12:11:47.185 INFO [stderr]     |
Dec 19 12:11:47.185 INFO [stderr] 252 |                 writeln!(buf, "  mov {}, rdx", REGS64[*dst as usize]);
Dec 19 12:11:47.185 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.185 INFO [stderr]     |
Dec 19 12:11:47.185 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.185 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 12:11:47.185 INFO [stderr] 
Dec 19 12:11:47.185 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.185 INFO [stderr]    --> src/codegen.rs:256:17
Dec 19 12:11:47.185 INFO [stderr]     |
Dec 19 12:11:47.185 INFO [stderr] 256 |                 writeln!(buf, "  mov cl, {}", REGS8[*src as usize]);
Dec 19 12:11:47.185 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.185 INFO [stderr]     |
Dec 19 12:11:47.185 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.185 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 12:11:47.185 INFO [stderr] 
Dec 19 12:11:47.185 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.185 INFO [stderr]    --> src/codegen.rs:257:17
Dec 19 12:11:47.185 INFO [stderr]     |
Dec 19 12:11:47.185 INFO [stderr] 257 |                 writeln!(buf, "  shl {}, cl", REGS64[*dst as usize]);
Dec 19 12:11:47.185 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.185 INFO [stderr]     |
Dec 19 12:11:47.185 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.185 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 12:11:47.185 INFO [stderr] 
Dec 19 12:11:47.185 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.185 INFO [stderr]    --> src/codegen.rs:261:17
Dec 19 12:11:47.185 INFO [stderr]     |
Dec 19 12:11:47.185 INFO [stderr] 261 |                 writeln!(buf, "  mov cl, {}", REGS8[*src as usize]);
Dec 19 12:11:47.185 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.185 INFO [stderr]     |
Dec 19 12:11:47.185 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.185 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 12:11:47.185 INFO [stderr] 
Dec 19 12:11:47.185 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.185 INFO [stderr]    --> src/codegen.rs:262:17
Dec 19 12:11:47.185 INFO [stderr]     |
Dec 19 12:11:47.185 INFO [stderr] 262 |                 writeln!(buf, "  shr {}, cl", REGS64[*dst as usize]);
Dec 19 12:11:47.185 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.185 INFO [stderr]     |
Dec 19 12:11:47.185 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.185 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 12:11:47.185 INFO [stderr] 
Dec 19 12:11:47.185 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.185 INFO [stderr]    --> src/codegen.rs:266:17
Dec 19 12:11:47.185 INFO [stderr]     |
Dec 19 12:11:47.185 INFO [stderr] 266 |                 writeln!(buf, "  neg {}", REGS64[*src as usize]);
Dec 19 12:11:47.185 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.185 INFO [stderr]     |
Dec 19 12:11:47.185 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.185 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 12:11:47.185 INFO [stderr] 
Dec 19 12:11:47.185 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.185 INFO [stderr]    --> src/codegen.rs:273:21
Dec 19 12:11:47.185 INFO [stderr]     |
Dec 19 12:11:47.185 INFO [stderr] 273 |                     writeln!(buf, "  mov {}, {}", caller64[i], REGS64[*arg as usize]);
Dec 19 12:11:47.185 INFO [stderr]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.185 INFO [stderr]     |
Dec 19 12:11:47.185 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.185 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 12:11:47.185 INFO [stderr] 
Dec 19 12:11:47.185 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.185 INFO [stderr]    --> src/codegen.rs:276:17
Dec 19 12:11:47.185 INFO [stderr]     |
Dec 19 12:11:47.185 INFO [stderr] 276 |                 writeln!(buf, "  push r10");
Dec 19 12:11:47.185 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.185 INFO [stderr]     |
Dec 19 12:11:47.185 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.185 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 12:11:47.185 INFO [stderr] 
Dec 19 12:11:47.185 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.185 INFO [stderr]    --> src/codegen.rs:277:17
Dec 19 12:11:47.185 INFO [stderr]     |
Dec 19 12:11:47.185 INFO [stderr] 277 |                 writeln!(buf, "  push r11");
Dec 19 12:11:47.185 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.185 INFO [stderr]     |
Dec 19 12:11:47.185 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.185 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 12:11:47.186 INFO [stderr] 
Dec 19 12:11:47.186 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.186 INFO [stderr]    --> src/codegen.rs:278:17
Dec 19 12:11:47.186 INFO [stderr]     |
Dec 19 12:11:47.186 INFO [stderr] 278 |                 writeln!(buf, "  mov rax, 0");
Dec 19 12:11:47.186 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.186 INFO [stderr]     |
Dec 19 12:11:47.186 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.186 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 12:11:47.186 INFO [stderr] 
Dec 19 12:11:47.186 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.186 INFO [stderr]    --> src/codegen.rs:279:17
Dec 19 12:11:47.186 INFO [stderr]     |
Dec 19 12:11:47.186 INFO [stderr] 279 |                 writeln!(buf, "  call {}", name);
Dec 19 12:11:47.186 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.186 INFO [stderr]     |
Dec 19 12:11:47.186 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.186 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 12:11:47.186 INFO [stderr] 
Dec 19 12:11:47.186 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.186 INFO [stderr]    --> src/codegen.rs:280:17
Dec 19 12:11:47.186 INFO [stderr]     |
Dec 19 12:11:47.186 INFO [stderr] 280 |                 writeln!(buf, "  pop r11");
Dec 19 12:11:47.186 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.186 INFO [stderr]     |
Dec 19 12:11:47.186 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.186 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 12:11:47.186 INFO [stderr] 
Dec 19 12:11:47.186 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.186 INFO [stderr]    --> src/codegen.rs:281:17
Dec 19 12:11:47.186 INFO [stderr]     |
Dec 19 12:11:47.186 INFO [stderr] 281 |                 writeln!(buf, "  pop r10");
Dec 19 12:11:47.186 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.186 INFO [stderr]     |
Dec 19 12:11:47.186 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.186 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 12:11:47.186 INFO [stderr] 
Dec 19 12:11:47.186 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.186 INFO [stderr]    --> src/codegen.rs:283:17
Dec 19 12:11:47.186 INFO [stderr]     |
Dec 19 12:11:47.186 INFO [stderr] 283 |                 writeln!(buf, "  mov {}, rax", REGS64[*reg as usize]);
Dec 19 12:11:47.186 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.186 INFO [stderr]     |
Dec 19 12:11:47.186 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.186 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 12:11:47.186 INFO [stderr] 
Dec 19 12:11:47.186 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.186 INFO [stderr]    --> src/codegen.rs:292:5
Dec 19 12:11:47.186 INFO [stderr]     |
Dec 19 12:11:47.186 INFO [stderr] 292 |     writeln!(buf, "{}:", ret);
Dec 19 12:11:47.186 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.186 INFO [stderr]     |
Dec 19 12:11:47.186 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.186 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 12:11:47.186 INFO [stderr] 
Dec 19 12:11:47.186 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.186 INFO [stderr]    --> src/codegen.rs:295:13
Dec 19 12:11:47.186 INFO [stderr]     |
Dec 19 12:11:47.186 INFO [stderr] 295 |             writeln!(buf, "  pop {}", r);
Dec 19 12:11:47.186 INFO [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.186 INFO [stderr]     |
Dec 19 12:11:47.186 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.186 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 12:11:47.186 INFO [stderr] 
Dec 19 12:11:47.186 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.186 INFO [stderr]    --> src/codegen.rs:298:5
Dec 19 12:11:47.186 INFO [stderr]     |
Dec 19 12:11:47.186 INFO [stderr] 298 |     writeln!(buf, "  mov rsp, rbp");
Dec 19 12:11:47.186 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.186 INFO [stderr]     |
Dec 19 12:11:47.186 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.186 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 12:11:47.186 INFO [stderr] 
Dec 19 12:11:47.186 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.186 INFO [stderr]    --> src/codegen.rs:299:5
Dec 19 12:11:47.186 INFO [stderr]     |
Dec 19 12:11:47.186 INFO [stderr] 299 |     writeln!(buf, "  pop rbp");
Dec 19 12:11:47.186 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.186 INFO [stderr]     |
Dec 19 12:11:47.186 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.186 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 12:11:47.186 INFO [stderr] 
Dec 19 12:11:47.186 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.186 INFO [stderr]    --> src/codegen.rs:300:5
Dec 19 12:11:47.186 INFO [stderr]     |
Dec 19 12:11:47.186 INFO [stderr] 300 |     writeln!(buf, "  ret");
Dec 19 12:11:47.186 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.186 INFO [stderr]     |
Dec 19 12:11:47.186 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.186 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 12:11:47.187 INFO [stderr] 
Dec 19 12:11:47.187 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.187 INFO [stderr]    --> src/codegen.rs:304:5
Dec 19 12:11:47.187 INFO [stderr]     |
Dec 19 12:11:47.187 INFO [stderr] 304 | /     writeln!(
Dec 19 12:11:47.187 INFO [stderr] 305 | |         buf,
Dec 19 12:11:47.187 INFO [stderr] 306 | |         "  cmp {}, {}",
Dec 19 12:11:47.187 INFO [stderr] 307 | |         REGS64[dst as usize], REGS64[src as usize]
Dec 19 12:11:47.187 INFO [stderr] 308 | |     );
Dec 19 12:11:47.187 INFO [stderr]     | |______^
Dec 19 12:11:47.187 INFO [stderr]     |
Dec 19 12:11:47.187 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.187 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 12:11:47.187 INFO [stderr] 
Dec 19 12:11:47.187 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.187 INFO [stderr]    --> src/codegen.rs:315:5
Dec 19 12:11:47.187 INFO [stderr]     |
Dec 19 12:11:47.187 INFO [stderr] 315 | /     writeln!(
Dec 19 12:11:47.187 INFO [stderr] 316 | |         buf,
Dec 19 12:11:47.187 INFO [stderr] 317 | |         "  movzx {}, {}",
Dec 19 12:11:47.187 INFO [stderr] 318 | |         REGS64[dst as usize], REGS8[dst as usize]
Dec 19 12:11:47.187 INFO [stderr] 319 | |     );
Dec 19 12:11:47.187 INFO [stderr]     | |______^
Dec 19 12:11:47.187 INFO [stderr]     |
Dec 19 12:11:47.187 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.187 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 12:11:47.187 INFO [stderr] 
Dec 19 12:11:47.276 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.276 INFO [stderr]   --> src/codegen.rs:19:5
Dec 19 12:11:47.277 INFO [stderr]    |
Dec 19 12:11:47.277 INFO [stderr] 19 |     writeln!(&mut buf, ".intel_syntax noprefix");
Dec 19 12:11:47.277 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.278 INFO [stderr]    |
Dec 19 12:11:47.278 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 19 12:11:47.278 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.279 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 12:11:47.279 INFO [stderr] 
Dec 19 12:11:47.279 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.280 INFO [stderr]   --> src/codegen.rs:21:5
Dec 19 12:11:47.280 INFO [stderr]    |
Dec 19 12:11:47.280 INFO [stderr] 21 |     writeln!(&mut buf, ".data");
Dec 19 12:11:47.280 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.281 INFO [stderr]    |
Dec 19 12:11:47.281 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.281 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 12:11:47.282 INFO [stderr] 
Dec 19 12:11:47.282 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.282 INFO [stderr]   --> src/codegen.rs:27:13
Dec 19 12:11:47.283 INFO [stderr]    |
Dec 19 12:11:47.283 INFO [stderr] 27 |             writeln!(&mut buf, "{}:", &name);
Dec 19 12:11:47.283 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.284 INFO [stderr]    |
Dec 19 12:11:47.284 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.284 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 12:11:47.284 INFO [stderr] 
Dec 19 12:11:47.285 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.285 INFO [stderr]   --> src/codegen.rs:28:13
Dec 19 12:11:47.285 INFO [stderr]    |
Dec 19 12:11:47.286 INFO [stderr] 28 |             writeln!(&mut buf, "  .ascii \"{}\"", escape(&data));
Dec 19 12:11:47.286 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.286 INFO [stderr]    |
Dec 19 12:11:47.287 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.287 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 12:11:47.287 INFO [stderr] 
Dec 19 12:11:47.288 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.288 INFO [stderr]   --> src/codegen.rs:32:5
Dec 19 12:11:47.288 INFO [stderr]    |
Dec 19 12:11:47.289 INFO [stderr] 32 |     writeln!(&mut buf, ".text");
Dec 19 12:11:47.289 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.289 INFO [stderr]    |
Dec 19 12:11:47.290 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.290 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 12:11:47.290 INFO [stderr] 
Dec 19 12:11:47.291 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.291 INFO [stderr]   --> src/codegen.rs:46:5
Dec 19 12:11:47.291 INFO [stderr]    |
Dec 19 12:11:47.291 INFO [stderr] 46 |     writeln!(buf, ".global {}", func.name);
Dec 19 12:11:47.292 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.292 INFO [stderr]    |
Dec 19 12:11:47.292 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.293 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 12:11:47.293 INFO [stderr] 
Dec 19 12:11:47.293 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.294 INFO [stderr]   --> src/codegen.rs:47:5
Dec 19 12:11:47.294 INFO [stderr]    |
Dec 19 12:11:47.294 INFO [stderr] 47 |     writeln!(buf, "{}:", func.name);
Dec 19 12:11:47.295 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.295 INFO [stderr]    |
Dec 19 12:11:47.295 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.296 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 12:11:47.296 INFO [stderr] 
Dec 19 12:11:47.296 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.296 INFO [stderr]   --> src/codegen.rs:49:5
Dec 19 12:11:47.297 INFO [stderr]    |
Dec 19 12:11:47.297 INFO [stderr] 49 |     writeln!(buf, "  push rbp");
Dec 19 12:11:47.304 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.304 INFO [stderr]    |
Dec 19 12:11:47.305 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.305 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 12:11:47.305 INFO [stderr] 
Dec 19 12:11:47.306 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.306 INFO [stderr]   --> src/codegen.rs:50:5
Dec 19 12:11:47.306 INFO [stderr]    |
Dec 19 12:11:47.307 INFO [stderr] 50 |     writeln!(buf, "  mov rbp, rsp");
Dec 19 12:11:47.307 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.307 INFO [stderr]    |
Dec 19 12:11:47.308 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.308 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 12:11:47.308 INFO [stderr] 
Dec 19 12:11:47.309 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.309 INFO [stderr]   --> src/codegen.rs:51:5
Dec 19 12:11:47.309 INFO [stderr]    |
Dec 19 12:11:47.309 INFO [stderr] 51 |     writeln!(buf, "  sub rsp, {}", round(func.stacksize, 16));
Dec 19 12:11:47.310 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.310 INFO [stderr]    |
Dec 19 12:11:47.310 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.311 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 12:11:47.311 INFO [stderr] 
Dec 19 12:11:47.311 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.311 INFO [stderr]   --> src/codegen.rs:74:9
Dec 19 12:11:47.312 INFO [stderr]    |
Dec 19 12:11:47.312 INFO [stderr] 74 |         writeln!(buf, "  push {}", r);
Dec 19 12:11:47.312 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.313 INFO [stderr]    |
Dec 19 12:11:47.313 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.313 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 12:11:47.313 INFO [stderr] 
Dec 19 12:11:47.314 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.314 INFO [stderr]   --> src/codegen.rs:83:17
Dec 19 12:11:47.315 INFO [stderr]    |
Dec 19 12:11:47.315 INFO [stderr] 83 |                 writeln!(buf, "  mov {}, {}", REGS64[*reg as usize], val);
Dec 19 12:11:47.315 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.315 INFO [stderr]    |
Dec 19 12:11:47.316 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.316 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 12:11:47.316 INFO [stderr] 
Dec 19 12:11:47.317 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.317 INFO [stderr]   --> src/codegen.rs:87:17
Dec 19 12:11:47.317 INFO [stderr]    |
Dec 19 12:11:47.318 INFO [stderr] 87 | /                 writeln!(
Dec 19 12:11:47.318 INFO [stderr] 88 | |                     buf,
Dec 19 12:11:47.318 INFO [stderr] 89 | |                     "  mov {}, {}",
Dec 19 12:11:47.319 INFO [stderr] 90 | |                     REGS64[*dst as usize], REGS64[*src as usize]
Dec 19 12:11:47.319 INFO [stderr] 91 | |                 );
Dec 19 12:11:47.319 INFO [stderr]    | |__________________^
Dec 19 12:11:47.319 INFO [stderr]    |
Dec 19 12:11:47.320 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.320 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 12:11:47.320 INFO [stderr] 
Dec 19 12:11:47.321 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.321 INFO [stderr]   --> src/codegen.rs:95:17
Dec 19 12:11:47.321 INFO [stderr]    |
Dec 19 12:11:47.322 INFO [stderr] 95 |                 writeln!(buf, "  mov rax, {}", REGS64[*src as usize]);
Dec 19 12:11:47.322 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.322 INFO [stderr]    |
Dec 19 12:11:47.323 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.323 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 12:11:47.323 INFO [stderr] 
Dec 19 12:11:47.324 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.324 INFO [stderr]   --> src/codegen.rs:96:17
Dec 19 12:11:47.324 INFO [stderr]    |
Dec 19 12:11:47.324 INFO [stderr] 96 |                 writeln!(buf, "  jmp {}", ret);
Dec 19 12:11:47.325 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.325 INFO [stderr]    |
Dec 19 12:11:47.325 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.326 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 12:11:47.326 INFO [stderr] 
Dec 19 12:11:47.326 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.327 INFO [stderr]    --> src/codegen.rs:100:17
Dec 19 12:11:47.327 INFO [stderr]     |
Dec 19 12:11:47.327 INFO [stderr] 100 | /                 writeln!(
Dec 19 12:11:47.328 INFO [stderr] 101 | |                     buf,
Dec 19 12:11:47.328 INFO [stderr] 102 | |                     "  mov {}, [{}]",
Dec 19 12:11:47.328 INFO [stderr] 103 | |                     match w {
Dec 19 12:11:47.328 INFO [stderr] ...   |
Dec 19 12:11:47.329 INFO [stderr] 108 | |                     REGS64[*src as usize]
Dec 19 12:11:47.329 INFO [stderr] 109 | |                 );
Dec 19 12:11:47.329 INFO [stderr]     | |__________________^
Dec 19 12:11:47.330 INFO [stderr]     |
Dec 19 12:11:47.330 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.330 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 12:11:47.330 INFO [stderr] 
Dec 19 12:11:47.331 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.331 INFO [stderr]    --> src/codegen.rs:112:21
Dec 19 12:11:47.332 INFO [stderr]     |
Dec 19 12:11:47.332 INFO [stderr] 112 | /                     writeln!(
Dec 19 12:11:47.332 INFO [stderr] 113 | |                         buf,
Dec 19 12:11:47.332 INFO [stderr] 114 | |                         "  movzx {}, {}",
Dec 19 12:11:47.333 INFO [stderr] 115 | |                         REGS64[*dst as usize], REGS8[*dst as usize]
Dec 19 12:11:47.333 INFO [stderr] 116 | |                     );
Dec 19 12:11:47.333 INFO [stderr]     | |______________________^
Dec 19 12:11:47.334 INFO [stderr]     |
Dec 19 12:11:47.334 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.334 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 12:11:47.335 INFO [stderr] 
Dec 19 12:11:47.335 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.335 INFO [stderr]    --> src/codegen.rs:121:17
Dec 19 12:11:47.336 INFO [stderr]     |
Dec 19 12:11:47.336 INFO [stderr] 121 | /                 writeln!(
Dec 19 12:11:47.336 INFO [stderr] 122 | |                     buf,
Dec 19 12:11:47.337 INFO [stderr] 123 | |                     "  mov [{}], {}",
Dec 19 12:11:47.337 INFO [stderr] 124 | |                     REGS64[*dst as usize],
Dec 19 12:11:47.337 INFO [stderr] ...   |
Dec 19 12:11:47.337 INFO [stderr] 129 | |                     },
Dec 19 12:11:47.338 INFO [stderr] 130 | |                 );
Dec 19 12:11:47.338 INFO [stderr]     | |__________________^
Dec 19 12:11:47.339 INFO [stderr]     |
Dec 19 12:11:47.339 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.339 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 12:11:47.339 INFO [stderr] 
Dec 19 12:11:47.340 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.340 INFO [stderr]    --> src/codegen.rs:134:17
Dec 19 12:11:47.341 INFO [stderr]     |
Dec 19 12:11:47.341 INFO [stderr] 134 | /                 writeln!(
Dec 19 12:11:47.341 INFO [stderr] 135 | |                     buf,
Dec 19 12:11:47.342 INFO [stderr] 136 | |                     "  mov [rbp-{}], {}",
Dec 19 12:11:47.342 INFO [stderr] 137 | |                     val,
Dec 19 12:11:47.342 INFO [stderr] ...   |
Dec 19 12:11:47.343 INFO [stderr] 142 | |                     },
Dec 19 12:11:47.343 INFO [stderr] 143 | |                 );
Dec 19 12:11:47.343 INFO [stderr]     | |__________________^
Dec 19 12:11:47.344 INFO [stderr]     |
Dec 19 12:11:47.344 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.344 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 12:11:47.344 INFO [stderr] 
Dec 19 12:11:47.345 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.345 INFO [stderr]    --> src/codegen.rs:147:17
Dec 19 12:11:47.346 INFO [stderr]     |
Dec 19 12:11:47.346 INFO [stderr] 147 |                 writeln!(buf, ".L{}:", val);
Dec 19 12:11:47.346 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.347 INFO [stderr]     |
Dec 19 12:11:47.347 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.347 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 12:11:47.347 INFO [stderr] 
Dec 19 12:11:47.348 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.348 INFO [stderr]    --> src/codegen.rs:151:17
Dec 19 12:11:47.349 INFO [stderr]     |
Dec 19 12:11:47.349 INFO [stderr] 151 |                 writeln!(buf, "  lea {}, {}", REGS64[*reg as usize], label);
Dec 19 12:11:47.349 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.350 INFO [stderr]     |
Dec 19 12:11:47.350 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.350 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 12:11:47.350 INFO [stderr] 
Dec 19 12:11:47.351 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.351 INFO [stderr]    --> src/codegen.rs:155:17
Dec 19 12:11:47.352 INFO [stderr]     |
Dec 19 12:11:47.352 INFO [stderr] 155 |                 writeln!(buf, "  cmp {}, 0", REGS64[*reg as usize]);
Dec 19 12:11:47.352 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.352 INFO [stderr]     |
Dec 19 12:11:47.353 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.353 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 12:11:47.353 INFO [stderr] 
Dec 19 12:11:47.354 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.354 INFO [stderr]    --> src/codegen.rs:156:17
Dec 19 12:11:47.354 INFO [stderr]     |
Dec 19 12:11:47.354 INFO [stderr] 156 |                 writeln!(buf, "  je .L{}", val);
Dec 19 12:11:47.355 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.355 INFO [stderr]     |
Dec 19 12:11:47.355 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.356 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 12:11:47.356 INFO [stderr] 
Dec 19 12:11:47.356 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.357 INFO [stderr]    --> src/codegen.rs:160:17
Dec 19 12:11:47.357 INFO [stderr]     |
Dec 19 12:11:47.357 INFO [stderr] 160 |                 writeln!(buf, "  jmp .L{}", val);
Dec 19 12:11:47.358 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.358 INFO [stderr]     |
Dec 19 12:11:47.358 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.359 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 12:11:47.359 INFO [stderr] 
Dec 19 12:11:47.359 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.360 INFO [stderr]    --> src/codegen.rs:164:17
Dec 19 12:11:47.360 INFO [stderr]     |
Dec 19 12:11:47.360 INFO [stderr] 164 | /                 writeln!(
Dec 19 12:11:47.360 INFO [stderr] 165 | |                     buf,
Dec 19 12:11:47.361 INFO [stderr] 166 | |                     "  or {},{}",
Dec 19 12:11:47.361 INFO [stderr] 167 | |                     REGS64[*dst as usize], REGS64[*src as usize]
Dec 19 12:11:47.361 INFO [stderr] 168 | |                 );
Dec 19 12:11:47.362 INFO [stderr]     | |__________________^
Dec 19 12:11:47.362 INFO [stderr]     |
Dec 19 12:11:47.362 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.363 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 12:11:47.363 INFO [stderr] 
Dec 19 12:11:47.363 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.364 INFO [stderr]    --> src/codegen.rs:172:17
Dec 19 12:11:47.364 INFO [stderr]     |
Dec 19 12:11:47.364 INFO [stderr] 172 | /                 writeln!(
Dec 19 12:11:47.365 INFO [stderr] 173 | |                     buf,
Dec 19 12:11:47.365 INFO [stderr] 174 | |                     "  xor {},{}",
Dec 19 12:11:47.365 INFO [stderr] 175 | |                     REGS64[*dst as usize], REGS64[*src as usize]
Dec 19 12:11:47.366 INFO [stderr] 176 | |                 );
Dec 19 12:11:47.366 INFO [stderr]     | |__________________^
Dec 19 12:11:47.366 INFO [stderr]     |
Dec 19 12:11:47.367 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.367 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 12:11:47.367 INFO [stderr] 
Dec 19 12:11:47.368 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.368 INFO [stderr]    --> src/codegen.rs:180:17
Dec 19 12:11:47.368 INFO [stderr]     |
Dec 19 12:11:47.369 INFO [stderr] 180 | /                 writeln!(
Dec 19 12:11:47.369 INFO [stderr] 181 | |                     buf,
Dec 19 12:11:47.369 INFO [stderr] 182 | |                     "  xor {},{}",
Dec 19 12:11:47.370 INFO [stderr] 183 | |                     REGS64[*reg as usize], val
Dec 19 12:11:47.370 INFO [stderr] 184 | |                 );
Dec 19 12:11:47.370 INFO [stderr]     | |__________________^
Dec 19 12:11:47.371 INFO [stderr]     |
Dec 19 12:11:47.371 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.371 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 12:11:47.371 INFO [stderr] 
Dec 19 12:11:47.372 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.372 INFO [stderr]    --> src/codegen.rs:188:17
Dec 19 12:11:47.373 INFO [stderr]     |
Dec 19 12:11:47.373 INFO [stderr] 188 | /                 writeln!(
Dec 19 12:11:47.373 INFO [stderr] 189 | |                     buf,
Dec 19 12:11:47.374 INFO [stderr] 190 | |                     "  and {},{}",
Dec 19 12:11:47.374 INFO [stderr] 191 | |                     REGS64[*dst as usize], REGS64[*src as usize]
Dec 19 12:11:47.374 INFO [stderr] 192 | |                 );
Dec 19 12:11:47.375 INFO [stderr]     | |__________________^
Dec 19 12:11:47.375 INFO [stderr]     |
Dec 19 12:11:47.375 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.376 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 12:11:47.376 INFO [stderr] 
Dec 19 12:11:47.376 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.377 INFO [stderr]    --> src/codegen.rs:196:17
Dec 19 12:11:47.377 INFO [stderr]     |
Dec 19 12:11:47.377 INFO [stderr] 196 |                 writeln!(buf, "  cmp {}, 0", REGS64[*reg as usize]);
Dec 19 12:11:47.378 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.378 INFO [stderr]     |
Dec 19 12:11:47.378 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.379 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 12:11:47.379 INFO [stderr] 
Dec 19 12:11:47.379 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.380 INFO [stderr]    --> src/codegen.rs:197:17
Dec 19 12:11:47.380 INFO [stderr]     |
Dec 19 12:11:47.380 INFO [stderr] 197 |                 writeln!(buf, "  jne .L{}", val);
Dec 19 12:11:47.381 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.381 INFO [stderr]     |
Dec 19 12:11:47.381 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.382 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 12:11:47.382 INFO [stderr] 
Dec 19 12:11:47.382 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.383 INFO [stderr]    --> src/codegen.rs:201:17
Dec 19 12:11:47.383 INFO [stderr]     |
Dec 19 12:11:47.383 INFO [stderr] 201 |                 writeln!(buf, "  lea {}, [rbp-{}]", REGS64[*reg as usize], val);
Dec 19 12:11:47.383 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.384 INFO [stderr]     |
Dec 19 12:11:47.384 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.384 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 12:11:47.385 INFO [stderr] 
Dec 19 12:11:47.385 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.385 INFO [stderr]    --> src/codegen.rs:205:17
Dec 19 12:11:47.385 INFO [stderr]     |
Dec 19 12:11:47.386 INFO [stderr] 205 | /                 writeln!(
Dec 19 12:11:47.386 INFO [stderr] 206 | |                     buf,
Dec 19 12:11:47.386 INFO [stderr] 207 | |                     "  add {}, {}",
Dec 19 12:11:47.387 INFO [stderr] 208 | |                     REGS64[*dst as usize], REGS64[*src as usize]
Dec 19 12:11:47.387 INFO [stderr] 209 | |                 );
Dec 19 12:11:47.387 INFO [stderr]     | |__________________^
Dec 19 12:11:47.388 INFO [stderr]     |
Dec 19 12:11:47.388 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.388 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 12:11:47.389 INFO [stderr] 
Dec 19 12:11:47.389 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.389 INFO [stderr]    --> src/codegen.rs:213:17
Dec 19 12:11:47.390 INFO [stderr]     |
Dec 19 12:11:47.390 INFO [stderr] 213 |                 writeln!(buf, "  add {}, {}", REGS64[*reg as usize], val);
Dec 19 12:11:47.390 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.391 INFO [stderr]     |
Dec 19 12:11:47.391 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.391 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 12:11:47.392 INFO [stderr] 
Dec 19 12:11:47.392 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.392 INFO [stderr]    --> src/codegen.rs:217:17
Dec 19 12:11:47.393 INFO [stderr]     |
Dec 19 12:11:47.393 INFO [stderr] 217 | /                 writeln!(
Dec 19 12:11:47.393 INFO [stderr] 218 | |                     buf,
Dec 19 12:11:47.394 INFO [stderr] 219 | |                     "  sub {}, {}",
Dec 19 12:11:47.394 INFO [stderr] 220 | |                     REGS64[*dst as usize], REGS64[*src as usize]
Dec 19 12:11:47.394 INFO [stderr] 221 | |                 );
Dec 19 12:11:47.395 INFO [stderr]     | |__________________^
Dec 19 12:11:47.395 INFO [stderr]     |
Dec 19 12:11:47.395 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.396 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 12:11:47.396 INFO [stderr] 
Dec 19 12:11:47.396 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.397 INFO [stderr]    --> src/codegen.rs:225:17
Dec 19 12:11:47.397 INFO [stderr]     |
Dec 19 12:11:47.397 INFO [stderr] 225 |                 writeln!(buf, "  sub {}, {}", REGS64[*reg as usize], val);
Dec 19 12:11:47.398 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.398 INFO [stderr]     |
Dec 19 12:11:47.398 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.399 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 12:11:47.399 INFO [stderr] 
Dec 19 12:11:47.399 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.400 INFO [stderr]    --> src/codegen.rs:230:17
Dec 19 12:11:47.400 INFO [stderr]     |
Dec 19 12:11:47.404 INFO [stderr] 230 |                 writeln!(buf, "  mov rax, {}", REGS64[*src as usize]);
Dec 19 12:11:47.404 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.404 INFO [stderr]     |
Dec 19 12:11:47.404 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.404 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 12:11:47.404 INFO [stderr] 
Dec 19 12:11:47.404 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.404 INFO [stderr]    --> src/codegen.rs:231:17
Dec 19 12:11:47.404 INFO [stderr]     |
Dec 19 12:11:47.404 INFO [stderr] 231 |                 writeln!(buf, "  mul {}", REGS64[*dst as usize]);
Dec 19 12:11:47.404 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.404 INFO [stderr]     |
Dec 19 12:11:47.404 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.404 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 12:11:47.404 INFO [stderr] 
Dec 19 12:11:47.404 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.404 INFO [stderr]    --> src/codegen.rs:232:17
Dec 19 12:11:47.404 INFO [stderr]     |
Dec 19 12:11:47.404 INFO [stderr] 232 |                 writeln!(buf, "  mov {}, rax", REGS64[*dst as usize]);
Dec 19 12:11:47.404 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.404 INFO [stderr]     |
Dec 19 12:11:47.404 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.404 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 12:11:47.404 INFO [stderr] 
Dec 19 12:11:47.404 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.404 INFO [stderr]    --> src/codegen.rs:236:17
Dec 19 12:11:47.404 INFO [stderr]     |
Dec 19 12:11:47.404 INFO [stderr] 236 |                 writeln!(buf, "  mov rax, {}", val);
Dec 19 12:11:47.404 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.404 INFO [stderr]     |
Dec 19 12:11:47.404 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.404 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 12:11:47.404 INFO [stderr] 
Dec 19 12:11:47.404 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.404 INFO [stderr]    --> src/codegen.rs:237:17
Dec 19 12:11:47.404 INFO [stderr]     |
Dec 19 12:11:47.404 INFO [stderr] 237 |                 writeln!(buf, "  mul {}", REGS64[*reg as usize]);
Dec 19 12:11:47.404 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.404 INFO [stderr]     |
Dec 19 12:11:47.404 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.405 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 12:11:47.405 INFO [stderr] 
Dec 19 12:11:47.405 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.405 INFO [stderr]    --> src/codegen.rs:238:17
Dec 19 12:11:47.405 INFO [stderr]     |
Dec 19 12:11:47.405 INFO [stderr] 238 |                 writeln!(buf, "  mov {}, rax", REGS64[*reg as usize]);
Dec 19 12:11:47.405 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.405 INFO [stderr]     |
Dec 19 12:11:47.405 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.405 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 12:11:47.405 INFO [stderr] 
Dec 19 12:11:47.405 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.405 INFO [stderr]    --> src/codegen.rs:242:17
Dec 19 12:11:47.405 INFO [stderr]     |
Dec 19 12:11:47.405 INFO [stderr] 242 |                 writeln!(buf, "  mov rax, {}", REGS64[*dst as usize]);
Dec 19 12:11:47.405 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.405 INFO [stderr]     |
Dec 19 12:11:47.405 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.405 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 12:11:47.405 INFO [stderr] 
Dec 19 12:11:47.405 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.405 INFO [stderr]    --> src/codegen.rs:243:17
Dec 19 12:11:47.405 INFO [stderr]     |
Dec 19 12:11:47.405 INFO [stderr] 243 |                 writeln!(buf, "  cqo");
Dec 19 12:11:47.405 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.405 INFO [stderr]     |
Dec 19 12:11:47.405 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.405 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 12:11:47.405 INFO [stderr] 
Dec 19 12:11:47.405 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.405 INFO [stderr]    --> src/codegen.rs:244:17
Dec 19 12:11:47.405 INFO [stderr]     |
Dec 19 12:11:47.405 INFO [stderr] 244 |                 writeln!(buf, "  div {}", REGS64[*src as usize]);
Dec 19 12:11:47.405 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.405 INFO [stderr]     |
Dec 19 12:11:47.412 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.412 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 12:11:47.412 INFO [stderr] 
Dec 19 12:11:47.412 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.412 INFO [stderr]    --> src/codegen.rs:245:17
Dec 19 12:11:47.412 INFO [stderr]     |
Dec 19 12:11:47.412 INFO [stderr] 245 |                 writeln!(buf, "  mov {}, rax", REGS64[*dst as usize]);
Dec 19 12:11:47.412 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.412 INFO [stderr]     |
Dec 19 12:11:47.412 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.412 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 12:11:47.412 INFO [stderr] 
Dec 19 12:11:47.412 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.412 INFO [stderr]    --> src/codegen.rs:249:17
Dec 19 12:11:47.412 INFO [stderr]     |
Dec 19 12:11:47.412 INFO [stderr] 249 |                 writeln!(buf, "  mov rax, {}", REGS64[*dst as usize]);
Dec 19 12:11:47.412 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.412 INFO [stderr]     |
Dec 19 12:11:47.412 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.412 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 12:11:47.412 INFO [stderr] 
Dec 19 12:11:47.412 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.412 INFO [stderr]    --> src/codegen.rs:250:17
Dec 19 12:11:47.412 INFO [stderr]     |
Dec 19 12:11:47.412 INFO [stderr] 250 |                 writeln!(buf, "  cqo");
Dec 19 12:11:47.412 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.412 INFO [stderr]     |
Dec 19 12:11:47.412 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.412 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 12:11:47.412 INFO [stderr] 
Dec 19 12:11:47.412 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.412 INFO [stderr]    --> src/codegen.rs:251:17
Dec 19 12:11:47.412 INFO [stderr]     |
Dec 19 12:11:47.412 INFO [stderr] 251 |                 writeln!(buf, "  div {}", REGS64[*src as usize]);
Dec 19 12:11:47.412 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.412 INFO [stderr]     |
Dec 19 12:11:47.412 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.412 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 12:11:47.413 INFO [stderr] 
Dec 19 12:11:47.413 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.413 INFO [stderr]    --> src/codegen.rs:252:17
Dec 19 12:11:47.413 INFO [stderr]     |
Dec 19 12:11:47.413 INFO [stderr] 252 |                 writeln!(buf, "  mov {}, rdx", REGS64[*dst as usize]);
Dec 19 12:11:47.413 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.413 INFO [stderr]     |
Dec 19 12:11:47.413 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.413 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 12:11:47.413 INFO [stderr] 
Dec 19 12:11:47.413 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.413 INFO [stderr]    --> src/codegen.rs:256:17
Dec 19 12:11:47.413 INFO [stderr]     |
Dec 19 12:11:47.413 INFO [stderr] 256 |                 writeln!(buf, "  mov cl, {}", REGS8[*src as usize]);
Dec 19 12:11:47.413 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.413 INFO [stderr]     |
Dec 19 12:11:47.413 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.413 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 12:11:47.413 INFO [stderr] 
Dec 19 12:11:47.413 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.413 INFO [stderr]    --> src/codegen.rs:257:17
Dec 19 12:11:47.413 INFO [stderr]     |
Dec 19 12:11:47.413 INFO [stderr] 257 |                 writeln!(buf, "  shl {}, cl", REGS64[*dst as usize]);
Dec 19 12:11:47.413 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.413 INFO [stderr]     |
Dec 19 12:11:47.413 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.413 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 12:11:47.413 INFO [stderr] 
Dec 19 12:11:47.413 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.413 INFO [stderr]    --> src/codegen.rs:261:17
Dec 19 12:11:47.413 INFO [stderr]     |
Dec 19 12:11:47.413 INFO [stderr] 261 |                 writeln!(buf, "  mov cl, {}", REGS8[*src as usize]);
Dec 19 12:11:47.413 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.413 INFO [stderr]     |
Dec 19 12:11:47.413 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.413 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 12:11:47.413 INFO [stderr] 
Dec 19 12:11:47.413 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.413 INFO [stderr]    --> src/codegen.rs:262:17
Dec 19 12:11:47.413 INFO [stderr]     |
Dec 19 12:11:47.413 INFO [stderr] 262 |                 writeln!(buf, "  shr {}, cl", REGS64[*dst as usize]);
Dec 19 12:11:47.413 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.413 INFO [stderr]     |
Dec 19 12:11:47.413 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.413 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 12:11:47.413 INFO [stderr] 
Dec 19 12:11:47.413 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.413 INFO [stderr]    --> src/codegen.rs:266:17
Dec 19 12:11:47.413 INFO [stderr]     |
Dec 19 12:11:47.413 INFO [stderr] 266 |                 writeln!(buf, "  neg {}", REGS64[*src as usize]);
Dec 19 12:11:47.413 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.413 INFO [stderr]     |
Dec 19 12:11:47.413 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.413 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 12:11:47.413 INFO [stderr] 
Dec 19 12:11:47.413 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.413 INFO [stderr]    --> src/codegen.rs:273:21
Dec 19 12:11:47.413 INFO [stderr]     |
Dec 19 12:11:47.413 INFO [stderr] 273 |                     writeln!(buf, "  mov {}, {}", caller64[i], REGS64[*arg as usize]);
Dec 19 12:11:47.413 INFO [stderr]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.413 INFO [stderr]     |
Dec 19 12:11:47.413 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.413 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 12:11:47.413 INFO [stderr] 
Dec 19 12:11:47.413 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.413 INFO [stderr]    --> src/codegen.rs:276:17
Dec 19 12:11:47.413 INFO [stderr]     |
Dec 19 12:11:47.413 INFO [stderr] 276 |                 writeln!(buf, "  push r10");
Dec 19 12:11:47.413 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.413 INFO [stderr]     |
Dec 19 12:11:47.413 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.413 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 12:11:47.413 INFO [stderr] 
Dec 19 12:11:47.413 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.413 INFO [stderr]    --> src/codegen.rs:277:17
Dec 19 12:11:47.413 INFO [stderr]     |
Dec 19 12:11:47.413 INFO [stderr] 277 |                 writeln!(buf, "  push r11");
Dec 19 12:11:47.413 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.413 INFO [stderr]     |
Dec 19 12:11:47.413 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.413 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 12:11:47.413 INFO [stderr] 
Dec 19 12:11:47.413 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.413 INFO [stderr]    --> src/codegen.rs:278:17
Dec 19 12:11:47.413 INFO [stderr]     |
Dec 19 12:11:47.413 INFO [stderr] 278 |                 writeln!(buf, "  mov rax, 0");
Dec 19 12:11:47.413 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.413 INFO [stderr]     |
Dec 19 12:11:47.414 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.414 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 12:11:47.414 INFO [stderr] 
Dec 19 12:11:47.414 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.414 INFO [stderr]    --> src/codegen.rs:279:17
Dec 19 12:11:47.414 INFO [stderr]     |
Dec 19 12:11:47.414 INFO [stderr] 279 |                 writeln!(buf, "  call {}", name);
Dec 19 12:11:47.420 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.420 INFO [stderr]     |
Dec 19 12:11:47.420 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.420 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 12:11:47.420 INFO [stderr] 
Dec 19 12:11:47.420 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.420 INFO [stderr]    --> src/codegen.rs:280:17
Dec 19 12:11:47.420 INFO [stderr]     |
Dec 19 12:11:47.420 INFO [stderr] 280 |                 writeln!(buf, "  pop r11");
Dec 19 12:11:47.420 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.420 INFO [stderr]     |
Dec 19 12:11:47.420 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.420 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 12:11:47.420 INFO [stderr] 
Dec 19 12:11:47.420 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.420 INFO [stderr]    --> src/codegen.rs:281:17
Dec 19 12:11:47.420 INFO [stderr]     |
Dec 19 12:11:47.420 INFO [stderr] 281 |                 writeln!(buf, "  pop r10");
Dec 19 12:11:47.420 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.420 INFO [stderr]     |
Dec 19 12:11:47.420 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.420 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 12:11:47.420 INFO [stderr] 
Dec 19 12:11:47.420 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.420 INFO [stderr]    --> src/codegen.rs:283:17
Dec 19 12:11:47.420 INFO [stderr]     |
Dec 19 12:11:47.420 INFO [stderr] 283 |                 writeln!(buf, "  mov {}, rax", REGS64[*reg as usize]);
Dec 19 12:11:47.420 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.420 INFO [stderr]     |
Dec 19 12:11:47.420 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.420 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 12:11:47.420 INFO [stderr] 
Dec 19 12:11:47.420 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.420 INFO [stderr]    --> src/codegen.rs:292:5
Dec 19 12:11:47.420 INFO [stderr]     |
Dec 19 12:11:47.420 INFO [stderr] 292 |     writeln!(buf, "{}:", ret);
Dec 19 12:11:47.420 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.420 INFO [stderr]     |
Dec 19 12:11:47.420 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.420 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 12:11:47.420 INFO [stderr] 
Dec 19 12:11:47.421 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.421 INFO [stderr]    --> src/codegen.rs:295:13
Dec 19 12:11:47.421 INFO [stderr]     |
Dec 19 12:11:47.421 INFO [stderr] 295 |             writeln!(buf, "  pop {}", r);
Dec 19 12:11:47.421 INFO [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.421 INFO [stderr]     |
Dec 19 12:11:47.421 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.421 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 12:11:47.421 INFO [stderr] 
Dec 19 12:11:47.421 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.421 INFO [stderr]    --> src/codegen.rs:298:5
Dec 19 12:11:47.421 INFO [stderr]     |
Dec 19 12:11:47.421 INFO [stderr] 298 |     writeln!(buf, "  mov rsp, rbp");
Dec 19 12:11:47.421 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.421 INFO [stderr]     |
Dec 19 12:11:47.421 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.421 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 12:11:47.421 INFO [stderr] 
Dec 19 12:11:47.421 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.421 INFO [stderr]    --> src/codegen.rs:299:5
Dec 19 12:11:47.421 INFO [stderr]     |
Dec 19 12:11:47.421 INFO [stderr] 299 |     writeln!(buf, "  pop rbp");
Dec 19 12:11:47.421 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.421 INFO [stderr]     |
Dec 19 12:11:47.421 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.421 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 12:11:47.421 INFO [stderr] 
Dec 19 12:11:47.421 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.421 INFO [stderr]    --> src/codegen.rs:300:5
Dec 19 12:11:47.421 INFO [stderr]     |
Dec 19 12:11:47.421 INFO [stderr] 300 |     writeln!(buf, "  ret");
Dec 19 12:11:47.421 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:11:47.421 INFO [stderr]     |
Dec 19 12:11:47.421 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.421 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 12:11:47.421 INFO [stderr] 
Dec 19 12:11:47.421 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.421 INFO [stderr]    --> src/codegen.rs:304:5
Dec 19 12:11:47.421 INFO [stderr]     |
Dec 19 12:11:47.421 INFO [stderr] 304 | /     writeln!(
Dec 19 12:11:47.421 INFO [stderr] 305 | |         buf,
Dec 19 12:11:47.421 INFO [stderr] 306 | |         "  cmp {}, {}",
Dec 19 12:11:47.421 INFO [stderr] 307 | |         REGS64[dst as usize], REGS64[src as usize]
Dec 19 12:11:47.421 INFO [stderr] 308 | |     );
Dec 19 12:11:47.421 INFO [stderr]     | |______^
Dec 19 12:11:47.421 INFO [stderr]     |
Dec 19 12:11:47.421 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.421 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 12:11:47.421 INFO [stderr] 
Dec 19 12:11:47.421 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 12:11:47.421 INFO [stderr]    --> src/codegen.rs:315:5
Dec 19 12:11:47.421 INFO [stderr]     |
Dec 19 12:11:47.421 INFO [stderr] 315 | /     writeln!(
Dec 19 12:11:47.421 INFO [stderr] 316 | |         buf,
Dec 19 12:11:47.421 INFO [stderr] 317 | |         "  movzx {}, {}",
Dec 19 12:11:47.421 INFO [stderr] 318 | |         REGS64[dst as usize], REGS8[dst as usize]
Dec 19 12:11:47.421 INFO [stderr] 319 | |     );
Dec 19 12:11:47.421 INFO [stderr]     | |______^
Dec 19 12:11:47.421 INFO [stderr]     |
Dec 19 12:11:47.421 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 12:11:47.421 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 12:11:47.421 INFO [stderr] 
Dec 19 12:11:47.748 INFO [stderr] warning: unused `#[macro_use]` import
Dec 19 12:11:47.748 INFO [stderr]  --> src/bin/rcc.rs:4:1
Dec 19 12:11:47.748 INFO [stderr]   |
Dec 19 12:11:47.748 INFO [stderr] 4 | #[macro_use]
Dec 19 12:11:47.748 INFO [stderr]   | ^^^^^^^^^^^^
Dec 19 12:11:47.748 INFO [stderr]   |
Dec 19 12:11:47.748 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 19 12:11:47.748 INFO [stderr] 
Dec 19 12:11:47.820 INFO [stderr] warning: unused `#[macro_use]` import
Dec 19 12:11:47.820 INFO [stderr]  --> src/bin/dump.rs:5:1
Dec 19 12:11:47.820 INFO [stderr]   |
Dec 19 12:11:47.820 INFO [stderr] 5 | #[macro_use]
Dec 19 12:11:47.820 INFO [stderr]   | ^^^^^^^^^^^^
Dec 19 12:11:47.820 INFO [stderr]   |
Dec 19 12:11:47.820 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 19 12:11:47.820 INFO [stderr] 
Dec 19 12:11:48.048 INFO [stderr] warning: unused `#[macro_use]` import
Dec 19 12:11:48.048 INFO [stderr]  --> src/bin/rcc.rs:4:1
Dec 19 12:11:48.048 INFO [stderr]   |
Dec 19 12:11:48.048 INFO [stderr] 4 | #[macro_use]
Dec 19 12:11:48.048 INFO [stderr]   | ^^^^^^^^^^^^
Dec 19 12:11:48.068 INFO [stderr]   |
Dec 19 12:11:48.068 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 19 12:11:48.068 INFO [stderr] 
Dec 19 12:11:48.068 INFO [stderr] warning: unused `#[macro_use]` import
Dec 19 12:11:48.068 INFO [stderr]  --> src/bin/dump.rs:5:1
Dec 19 12:11:48.068 INFO [stderr]   |
Dec 19 12:11:48.068 INFO [stderr] 5 | #[macro_use]
Dec 19 12:11:48.068 INFO [stderr]   | ^^^^^^^^^^^^
Dec 19 12:11:48.068 INFO [stderr]   |
Dec 19 12:11:48.068 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 19 12:11:48.068 INFO [stderr] 
Dec 19 12:11:48.280 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.97s
Dec 19 12:11:49.062 INFO running `"docker" "inspect" "12518e0a525d9bc14fbb31e3078aa2906676a165547eee6d045164cfd1d9579b"`
Dec 19 12:11:49.334 INFO running `"docker" "rm" "-f" "12518e0a525d9bc14fbb31e3078aa2906676a165547eee6d045164cfd1d9579b"`
Dec 19 12:11:49.620 INFO [stdout] 12518e0a525d9bc14fbb31e3078aa2906676a165547eee6d045164cfd1d9579b