[INFO] updating cached repository gLITCHMaster16/rust_twiddle_bits
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/gLITCHMaster16/rust_twiddle_bits
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/gLITCHMaster16/rust_twiddle_bits" "work/ex/beta-1.38-1/sources/1.37.0/gh/gLITCHMaster16/rust_twiddle_bits"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/gLITCHMaster16/rust_twiddle_bits'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/gLITCHMaster16/rust_twiddle_bits" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/gLITCHMaster16/rust_twiddle_bits"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/gLITCHMaster16/rust_twiddle_bits'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] b3f299cfef9d6a8817a4c60d4d363edf9e83937a
[INFO] sha for GitHub repo gLITCHMaster16/rust_twiddle_bits: b3f299cfef9d6a8817a4c60d4d363edf9e83937a
[INFO] validating manifest of gLITCHMaster16/rust_twiddle_bits on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of gLITCHMaster16/rust_twiddle_bits on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing gLITCHMaster16/rust_twiddle_bits
[INFO] finished frobbing gLITCHMaster16/rust_twiddle_bits
[INFO] frobbed toml for gLITCHMaster16/rust_twiddle_bits written to work/ex/beta-1.38-1/sources/1.37.0/gh/gLITCHMaster16/rust_twiddle_bits/Cargo.toml
[INFO] started frobbing gLITCHMaster16/rust_twiddle_bits
[INFO] finished frobbing gLITCHMaster16/rust_twiddle_bits
[INFO] frobbed toml for gLITCHMaster16/rust_twiddle_bits written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/gLITCHMaster16/rust_twiddle_bits/Cargo.toml
[INFO] crate gLITCHMaster16/rust_twiddle_bits already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing gLITCHMaster16/rust_twiddle_bits against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-3/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/gLITCHMaster16/rust_twiddle_bits:/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=warn" "-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" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] 035d81244cd62bfb48869f44b73d5c1e4d3493923d4e313d144ecc772c1cbdaa
[INFO] running `"docker" "start" "-a" "035d81244cd62bfb48869f44b73d5c1e4d3493923d4e313d144ecc772c1cbdaa"`
[INFO] [stderr]    Compiling TwiddleBitsHelloWorld v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unnecessary parentheses around `if` condition
[INFO] [stderr]   --> src/main.rs:57:12
[INFO] [stderr]    |
[INFO] [stderr] 57 |         if (self.registers[ REGISTER_PC as usize ] & 1 == 1) {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `REGISTER_SF`
[INFO] [stderr]   --> src/main.rs:15:1
[INFO] [stderr]    |
[INFO] [stderr] 15 | const REGISTER_SF: u8 = 6;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `OP_LWO`
[INFO] [stderr]   --> src/main.rs:23:1
[INFO] [stderr]    |
[INFO] [stderr] 23 | const OP_LWO: u16 = 0b1110 << 12;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `OP_SWO`
[INFO] [stderr]   --> src/main.rs:24:1
[INFO] [stderr]    |
[INFO] [stderr] 24 | const OP_SWO: u16 = 0b1111 << 12;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `print_byte`
[INFO] [stderr]    --> src/main.rs:123:1
[INFO] [stderr]     |
[INFO] [stderr] 123 | fn print_byte(byte: &u8) {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: crate `TwiddleBitsHelloWorld` should have a snake case name
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr]   = help: convert the identifier to snake case: `twiddle_bits_hello_world`
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/main.rs:179:5
[INFO] [stderr]     |
[INFO] [stderr] 179 |     file.write_all(&buff);
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.91s
[INFO] running `"docker" "inspect" "035d81244cd62bfb48869f44b73d5c1e4d3493923d4e313d144ecc772c1cbdaa"`
[INFO] running `"docker" "rm" "-f" "035d81244cd62bfb48869f44b73d5c1e4d3493923d4e313d144ecc772c1cbdaa"`
[INFO] [stdout] 035d81244cd62bfb48869f44b73d5c1e4d3493923d4e313d144ecc772c1cbdaa
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-3/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/gLITCHMaster16/rust_twiddle_bits:/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=warn" "-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" "+beta-2019-08-13" "test" "--frozen" "--no-run"`
[INFO] [stdout] f5314c2f69e3acc296cb4a3abac102e7b35d7ad7a698ea492a7921dfa7ff627e
[INFO] running `"docker" "start" "-a" "f5314c2f69e3acc296cb4a3abac102e7b35d7ad7a698ea492a7921dfa7ff627e"`
[INFO] [stderr]    Compiling TwiddleBitsHelloWorld v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unnecessary parentheses around `if` condition
[INFO] [stderr]   --> src/main.rs:57:12
[INFO] [stderr]    |
[INFO] [stderr] 57 |         if (self.registers[ REGISTER_PC as usize ] & 1 == 1) {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `REGISTER_SF`
[INFO] [stderr]   --> src/main.rs:15:1
[INFO] [stderr]    |
[INFO] [stderr] 15 | const REGISTER_SF: u8 = 6;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `OP_LWO`
[INFO] [stderr]   --> src/main.rs:23:1
[INFO] [stderr]    |
[INFO] [stderr] 23 | const OP_LWO: u16 = 0b1110 << 12;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `OP_SWO`
[INFO] [stderr]   --> src/main.rs:24:1
[INFO] [stderr]    |
[INFO] [stderr] 24 | const OP_SWO: u16 = 0b1111 << 12;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `print_byte`
[INFO] [stderr]    --> src/main.rs:123:1
[INFO] [stderr]     |
[INFO] [stderr] 123 | fn print_byte(byte: &u8) {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: crate `TwiddleBitsHelloWorld` should have a snake case name
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr]   = help: convert the identifier to snake case: `twiddle_bits_hello_world`
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/main.rs:179:5
[INFO] [stderr]     |
[INFO] [stderr] 179 |     file.write_all(&buff);
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.86s
[INFO] running `"docker" "inspect" "f5314c2f69e3acc296cb4a3abac102e7b35d7ad7a698ea492a7921dfa7ff627e"`
[INFO] running `"docker" "rm" "-f" "f5314c2f69e3acc296cb4a3abac102e7b35d7ad7a698ea492a7921dfa7ff627e"`
[INFO] [stdout] f5314c2f69e3acc296cb4a3abac102e7b35d7ad7a698ea492a7921dfa7ff627e
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-3/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/gLITCHMaster16/rust_twiddle_bits:/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=warn" "-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" "+beta-2019-08-13" "test" "--frozen"`
[INFO] [stdout] e076864ff1aae28e83a7523109c8e11ac111df8f4a594d89316f64ad4dfc5fb9
[INFO] running `"docker" "start" "-a" "e076864ff1aae28e83a7523109c8e11ac111df8f4a594d89316f64ad4dfc5fb9"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/TwiddleBitsHelloWorld-27c810708d54b6bd
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "e076864ff1aae28e83a7523109c8e11ac111df8f4a594d89316f64ad4dfc5fb9"`
[INFO] running `"docker" "rm" "-f" "e076864ff1aae28e83a7523109c8e11ac111df8f4a594d89316f64ad4dfc5fb9"`
[INFO] [stdout] e076864ff1aae28e83a7523109c8e11ac111df8f4a594d89316f64ad4dfc5fb9