[INFO] updating cached repository keatinge/rust-to-mips-compiler
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/keatinge/rust-to-mips-compiler
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/keatinge/rust-to-mips-compiler" "work/ex/beta-1.38-1/sources/1.37.0/gh/keatinge/rust-to-mips-compiler"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/keatinge/rust-to-mips-compiler'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/keatinge/rust-to-mips-compiler" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/keatinge/rust-to-mips-compiler"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/keatinge/rust-to-mips-compiler'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 42e1328fb446ba0d7ed35d3b48b1355ba57d55e6
[INFO] sha for GitHub repo keatinge/rust-to-mips-compiler: 42e1328fb446ba0d7ed35d3b48b1355ba57d55e6
[INFO] validating manifest of keatinge/rust-to-mips-compiler 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 keatinge/rust-to-mips-compiler 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 keatinge/rust-to-mips-compiler
[INFO] finished frobbing keatinge/rust-to-mips-compiler
[INFO] frobbed toml for keatinge/rust-to-mips-compiler written to work/ex/beta-1.38-1/sources/1.37.0/gh/keatinge/rust-to-mips-compiler/Cargo.toml
[INFO] started frobbing keatinge/rust-to-mips-compiler
[INFO] finished frobbing keatinge/rust-to-mips-compiler
[INFO] frobbed toml for keatinge/rust-to-mips-compiler written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/keatinge/rust-to-mips-compiler/Cargo.toml
[INFO] crate keatinge/rust-to-mips-compiler 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 keatinge/rust-to-mips-compiler 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-7/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/keatinge/rust-to-mips-compiler:/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] 4f1432213b844c4ce8f65eec4829c16479b05ba9772f82ef70a17c4fd7bd4d3e
[INFO] running `"docker" "start" "-a" "4f1432213b844c4ce8f65eec4829c16479b05ba9772f82ef70a17c4fd7bd4d3e"`
[INFO] [stderr]    Compiling mipscompiler v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variant `i32` should have an upper camel case name
[INFO] [stderr]  --> src/parser.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 |     i32
[INFO] [stderr]   |     ^^^ help: convert the identifier to upper camel case: `I32`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant `I32_lit` should have an upper camel case name
[INFO] [stderr]   --> src/parser.rs:24:5
[INFO] [stderr]    |
[INFO] [stderr] 24 |     I32_lit(i32)
[INFO] [stderr]    |     ^^^^^^^ help: convert the identifier to upper camel case: `I32Lit`
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::rc::Rc`
[INFO] [stderr]  --> src/mips.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::rc::Rc;
[INFO] [stderr]   |     ^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `s`
[INFO] [stderr]    --> src/parser.rs:179:34
[INFO] [stderr]     |
[INFO] [stderr] 179 |             &lexer::Token::Ident(s) if next == Some(&lexer::Token::OpenParen) => { self.parse_fn_call() }
[INFO] [stderr]     |                                  ^ help: consider prefixing with an underscore: `_s`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `s`
[INFO] [stderr]    --> src/parser.rs:180:34
[INFO] [stderr]     |
[INFO] [stderr] 180 |             &lexer::Token::Ident(s) => {
[INFO] [stderr]     |                                  ^ help: consider prefixing with an underscore: `_s`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `s`
[INFO] [stderr]    --> src/parser.rs:290:38
[INFO] [stderr]     |
[INFO] [stderr] 290 |         if let (&lexer::Token::Ident(s), Some(&lexer::Token::Equal)) = (self.current_tok(), self.peek()) {
[INFO] [stderr]     |                                      ^ help: consider prefixing with an underscore: `_s`
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `is_identifier`
[INFO] [stderr]    --> src/lexer.rs:180:1
[INFO] [stderr]     |
[INFO] [stderr] 180 | pub fn is_identifier(t: &Token) -> bool {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `expect`
[INFO] [stderr]    --> src/parser.rs:132:5
[INFO] [stderr]     |
[INFO] [stderr] 132 |     fn expect(&self, t: &lexer::Token)  {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `force_eat_return_i32_lit`
[INFO] [stderr]    --> src/parser.rs:157:5
[INFO] [stderr]     |
[INFO] [stderr] 157 |     fn force_eat_return_i32_lit(&mut self) -> i32 {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `BeqLit`
[INFO] [stderr]   --> src/mips.rs:61:5
[INFO] [stderr]    |
[INFO] [stderr] 61 |     BeqLit(Register, i32, &'a str),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/main.rs:29:5
[INFO] [stderr]    |
[INFO] [stderr] 29 |     output.write_all(mips_str.as_bytes());
[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] warning: variable `DeclData` should have a snake case name
[INFO] [stderr]    --> src/mips.rs:403:53
[INFO] [stderr]     |
[INFO] [stderr] 403 |                 &parser::Statement::Declaration(ref DeclData) => {
[INFO] [stderr]     |                                                     ^^^^^^^^ help: convert the identifier to snake case: `decl_data`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.69s
[INFO] running `"docker" "inspect" "4f1432213b844c4ce8f65eec4829c16479b05ba9772f82ef70a17c4fd7bd4d3e"`
[INFO] running `"docker" "rm" "-f" "4f1432213b844c4ce8f65eec4829c16479b05ba9772f82ef70a17c4fd7bd4d3e"`
[INFO] [stdout] 4f1432213b844c4ce8f65eec4829c16479b05ba9772f82ef70a17c4fd7bd4d3e
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/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/keatinge/rust-to-mips-compiler:/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] ee7b5cfd274604d15e6476be897c6c5bff2f908b320ac6904a9c3c5fbe85c89b
[INFO] running `"docker" "start" "-a" "ee7b5cfd274604d15e6476be897c6c5bff2f908b320ac6904a9c3c5fbe85c89b"`
[INFO] [stderr]    Compiling mipscompiler v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variant `i32` should have an upper camel case name
[INFO] [stderr]  --> src/parser.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 |     i32
[INFO] [stderr]   |     ^^^ help: convert the identifier to upper camel case: `I32`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant `I32_lit` should have an upper camel case name
[INFO] [stderr]   --> src/parser.rs:24:5
[INFO] [stderr]    |
[INFO] [stderr] 24 |     I32_lit(i32)
[INFO] [stderr]    |     ^^^^^^^ help: convert the identifier to upper camel case: `I32Lit`
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::rc::Rc`
[INFO] [stderr]  --> src/mips.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::rc::Rc;
[INFO] [stderr]   |     ^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `s`
[INFO] [stderr]    --> src/parser.rs:179:34
[INFO] [stderr]     |
[INFO] [stderr] 179 |             &lexer::Token::Ident(s) if next == Some(&lexer::Token::OpenParen) => { self.parse_fn_call() }
[INFO] [stderr]     |                                  ^ help: consider prefixing with an underscore: `_s`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `s`
[INFO] [stderr]    --> src/parser.rs:180:34
[INFO] [stderr]     |
[INFO] [stderr] 180 |             &lexer::Token::Ident(s) => {
[INFO] [stderr]     |                                  ^ help: consider prefixing with an underscore: `_s`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `s`
[INFO] [stderr]    --> src/parser.rs:290:38
[INFO] [stderr]     |
[INFO] [stderr] 290 |         if let (&lexer::Token::Ident(s), Some(&lexer::Token::Equal)) = (self.current_tok(), self.peek()) {
[INFO] [stderr]     |                                      ^ help: consider prefixing with an underscore: `_s`
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `is_identifier`
[INFO] [stderr]    --> src/lexer.rs:180:1
[INFO] [stderr]     |
[INFO] [stderr] 180 | pub fn is_identifier(t: &Token) -> bool {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `expect`
[INFO] [stderr]    --> src/parser.rs:132:5
[INFO] [stderr]     |
[INFO] [stderr] 132 |     fn expect(&self, t: &lexer::Token)  {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `force_eat_return_i32_lit`
[INFO] [stderr]    --> src/parser.rs:157:5
[INFO] [stderr]     |
[INFO] [stderr] 157 |     fn force_eat_return_i32_lit(&mut self) -> i32 {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `BeqLit`
[INFO] [stderr]   --> src/mips.rs:61:5
[INFO] [stderr]    |
[INFO] [stderr] 61 |     BeqLit(Register, i32, &'a str),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/main.rs:29:5
[INFO] [stderr]    |
[INFO] [stderr] 29 |     output.write_all(mips_str.as_bytes());
[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] warning: variable `DeclData` should have a snake case name
[INFO] [stderr]    --> src/mips.rs:403:53
[INFO] [stderr]     |
[INFO] [stderr] 403 |                 &parser::Statement::Declaration(ref DeclData) => {
[INFO] [stderr]     |                                                     ^^^^^^^^ help: convert the identifier to snake case: `decl_data`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.03s
[INFO] running `"docker" "inspect" "ee7b5cfd274604d15e6476be897c6c5bff2f908b320ac6904a9c3c5fbe85c89b"`
[INFO] running `"docker" "rm" "-f" "ee7b5cfd274604d15e6476be897c6c5bff2f908b320ac6904a9c3c5fbe85c89b"`
[INFO] [stdout] ee7b5cfd274604d15e6476be897c6c5bff2f908b320ac6904a9c3c5fbe85c89b
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/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/keatinge/rust-to-mips-compiler:/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] 5b37feb5ab67972cf3f8386eedea53785de3cc6b7c1f67e9b18310b25c557e4d
[INFO] running `"docker" "start" "-a" "5b37feb5ab67972cf3f8386eedea53785de3cc6b7c1f67e9b18310b25c557e4d"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/mipscompiler-101d987f9e508712
[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" "5b37feb5ab67972cf3f8386eedea53785de3cc6b7c1f67e9b18310b25c557e4d"`
[INFO] running `"docker" "rm" "-f" "5b37feb5ab67972cf3f8386eedea53785de3cc6b7c1f67e9b18310b25c557e4d"`
[INFO] [stdout] 5b37feb5ab67972cf3f8386eedea53785de3cc6b7c1f67e9b18310b25c557e4d