[INFO] updating cached repository n4to4/interpreter-rs
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/n4to4/interpreter-rs
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/n4to4/interpreter-rs" "work/ex/beta-1.37-6/sources/1.36.0/gh/n4to4/interpreter-rs"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/n4to4/interpreter-rs'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/n4to4/interpreter-rs" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/n4to4/interpreter-rs"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/n4to4/interpreter-rs'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 14ece5df4d2e1a7f60069af47418825a0d3bcc78
[INFO] sha for GitHub repo n4to4/interpreter-rs: 14ece5df4d2e1a7f60069af47418825a0d3bcc78
[INFO] validating manifest of n4to4/interpreter-rs on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of n4to4/interpreter-rs on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing n4to4/interpreter-rs
[INFO] finished frobbing n4to4/interpreter-rs
[INFO] frobbed toml for n4to4/interpreter-rs written to work/ex/beta-1.37-6/sources/1.36.0/gh/n4to4/interpreter-rs/Cargo.toml
[INFO] started frobbing n4to4/interpreter-rs
[INFO] finished frobbing n4to4/interpreter-rs
[INFO] frobbed toml for n4to4/interpreter-rs written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/n4to4/interpreter-rs/Cargo.toml
[INFO] crate n4to4/interpreter-rs already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing n4to4/interpreter-rs against 1.36.0 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-6/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/n4to4/interpreter-rs:/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" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] db21e2a27aa418a9ac528459e992a8b85dce5971847ced5dd9505720dfbbc2c4
[INFO] running `"docker" "start" "-a" "db21e2a27aa418a9ac528459e992a8b85dce5971847ced5dd9505720dfbbc2c4"`
[INFO] [stderr]    Compiling interpreter v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused `#[macro_use]` import
[INFO] [stderr]  --> src/main.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | #[macro_use]
[INFO] [stderr]   | ^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant `NOT_EQ` should have an upper camel case name
[INFO] [stderr]   --> src/token.rs:27:5
[INFO] [stderr]    |
[INFO] [stderr] 27 |     NOT_EQ,
[INFO] [stderr]    |     ^^^^^^ help: convert the identifier to upper camel case: `NotEq`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(non_camel_case_types)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/repl.rs:17:17
[INFO] [stderr]    |
[INFO] [stderr] 17 |             let mut l = Lexer::new(line);
[INFO] [stderr]    |                 ----^
[INFO] [stderr]    |                 |
[INFO] [stderr]    |                 help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Program`
[INFO] [stderr]   --> src/ast.rs:23:1
[INFO] [stderr]    |
[INFO] [stderr] 23 | pub struct Program {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/ast.rs:27:5
[INFO] [stderr]    |
[INFO] [stderr] 27 |     pub fn new() -> Program {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `token_literal`
[INFO] [stderr]   --> src/ast.rs:33:5
[INFO] [stderr]    |
[INFO] [stderr] 33 |     fn token_literal(&self) -> String {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Identifier`
[INFO] [stderr]   --> src/ast.rs:47:1
[INFO] [stderr]    |
[INFO] [stderr] 47 | pub struct Identifier {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `LetStatement`
[INFO] [stderr]   --> src/ast.rs:63:1
[INFO] [stderr]    |
[INFO] [stderr] 63 | pub struct LetStatement {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Parser`
[INFO] [stderr]  --> src/parser.rs:5:1
[INFO] [stderr]   |
[INFO] [stderr] 5 | struct Parser<'a> {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/parser.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 |     fn new(l: &'a mut Lexer) -> Self {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `next_token`
[INFO] [stderr]   --> src/parser.rs:23:5
[INFO] [stderr]    |
[INFO] [stderr] 23 |     fn next_token(&mut self) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `parse_program`
[INFO] [stderr]   --> src/parser.rs:31:5
[INFO] [stderr]    |
[INFO] [stderr] 31 |     fn parse_program(&mut self) -> Option<Program> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `parse_statement`
[INFO] [stderr]   --> src/parser.rs:46:5
[INFO] [stderr]    |
[INFO] [stderr] 46 |     fn parse_statement(&mut self) -> Option<Box<ast::Statement>> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `parse_let_statement`
[INFO] [stderr]   --> src/parser.rs:53:5
[INFO] [stderr]    |
[INFO] [stderr] 53 |     fn parse_let_statement(&mut self) -> Option<ast::LetStatement> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `cur_token_is`
[INFO] [stderr]   --> src/parser.rs:81:5
[INFO] [stderr]    |
[INFO] [stderr] 81 |     fn cur_token_is(&self, t: token::TokenType) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `peek_token_is`
[INFO] [stderr]   --> src/parser.rs:84:5
[INFO] [stderr]    |
[INFO] [stderr] 84 |     fn peek_token_is(&self, t: token::TokenType) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `expect_peek`
[INFO] [stderr]   --> src/parser.rs:87:5
[INFO] [stderr]    |
[INFO] [stderr] 87 |     fn expect_peek(&mut self, t: token::TokenType) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.26s
[INFO] running `"docker" "inspect" "db21e2a27aa418a9ac528459e992a8b85dce5971847ced5dd9505720dfbbc2c4"`
[INFO] running `"docker" "rm" "-f" "db21e2a27aa418a9ac528459e992a8b85dce5971847ced5dd9505720dfbbc2c4"`
[INFO] [stdout] db21e2a27aa418a9ac528459e992a8b85dce5971847ced5dd9505720dfbbc2c4
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-6/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/n4to4/interpreter-rs:/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" "+1.36.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] d47cef471b14f0d178f2f3f8f2e5704e3f1de1a2df83c555b8c8e2c082538f12
[INFO] running `"docker" "start" "-a" "d47cef471b14f0d178f2f3f8f2e5704e3f1de1a2df83c555b8c8e2c082538f12"`
[INFO] [stderr]    Compiling interpreter v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variant `NOT_EQ` should have an upper camel case name
[INFO] [stderr]   --> src/token.rs:27:5
[INFO] [stderr]    |
[INFO] [stderr] 27 |     NOT_EQ,
[INFO] [stderr]    |     ^^^^^^ help: convert the identifier to upper camel case: `NotEq`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(non_camel_case_types)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/repl.rs:17:17
[INFO] [stderr]    |
[INFO] [stderr] 17 |             let mut l = Lexer::new(line);
[INFO] [stderr]    |                 ----^
[INFO] [stderr]    |                 |
[INFO] [stderr]    |                 help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `token_literal`
[INFO] [stderr]   --> src/ast.rs:33:5
[INFO] [stderr]    |
[INFO] [stderr] 33 |     fn token_literal(&self) -> String {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `print_if_string`
[INFO] [stderr]    --> src/parser.rs:104:5
[INFO] [stderr]     |
[INFO] [stderr] 104 |     fn print_if_string(s: &Any) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.26s
[INFO] running `"docker" "inspect" "d47cef471b14f0d178f2f3f8f2e5704e3f1de1a2df83c555b8c8e2c082538f12"`
[INFO] running `"docker" "rm" "-f" "d47cef471b14f0d178f2f3f8f2e5704e3f1de1a2df83c555b8c8e2c082538f12"`
[INFO] [stdout] d47cef471b14f0d178f2f3f8f2e5704e3f1de1a2df83c555b8c8e2c082538f12
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-6/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/n4to4/interpreter-rs:/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" "+1.36.0" "test" "--frozen"`
[INFO] [stdout] 94857c28ef244ee1589384b8b963fb7286b4daeeb4a06d39b1ae599be6971778
[INFO] running `"docker" "start" "-a" "94857c28ef244ee1589384b8b963fb7286b4daeeb4a06d39b1ae599be6971778"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/interpreter-09f6e9ff680bec15
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test token::tests::next_token ... ok
[INFO] [stdout] test token::tests::next_token2 ... ok
[INFO] [stdout] test parser::tests::let_statements ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "94857c28ef244ee1589384b8b963fb7286b4daeeb4a06d39b1ae599be6971778"`
[INFO] running `"docker" "rm" "-f" "94857c28ef244ee1589384b8b963fb7286b4daeeb4a06d39b1ae599be6971778"`
[INFO] [stdout] 94857c28ef244ee1589384b8b963fb7286b4daeeb4a06d39b1ae599be6971778