[INFO] updating cached repository cronning9/math-lexer
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/cronning9/math-lexer
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/cronning9/math-lexer" "work/ex/beta-1.38-1/sources/1.37.0/gh/cronning9/math-lexer"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/cronning9/math-lexer'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/cronning9/math-lexer" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/cronning9/math-lexer"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/cronning9/math-lexer'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 5cec47c8a60cafb16fee2c5489b3e757f4f9c175
[INFO] sha for GitHub repo cronning9/math-lexer: 5cec47c8a60cafb16fee2c5489b3e757f4f9c175
[INFO] validating manifest of cronning9/math-lexer 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 cronning9/math-lexer 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 cronning9/math-lexer
[INFO] finished frobbing cronning9/math-lexer
[INFO] frobbed toml for cronning9/math-lexer written to work/ex/beta-1.38-1/sources/1.37.0/gh/cronning9/math-lexer/Cargo.toml
[INFO] started frobbing cronning9/math-lexer
[INFO] finished frobbing cronning9/math-lexer
[INFO] frobbed toml for cronning9/math-lexer written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/cronning9/math-lexer/Cargo.toml
[INFO] crate cronning9/math-lexer 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 cronning9/math-lexer against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/cronning9/math-lexer:/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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] fd06e993364027469ca57716e3f0dc95bfc6af36a97f825798f9776cd60f5586
[INFO] running `"docker" "start" "-a" "fd06e993364027469ca57716e3f0dc95bfc6af36a97f825798f9776cd60f5586"`
[INFO] [stderr]    Compiling math-lexer v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `std::str::Chars`
[INFO] [stderr]  --> src/lexer.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::str::Chars;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::iter::Enumerate`
[INFO] [stderr]  --> src/lexer.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::iter::Enumerate;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::fmt::Debug`
[INFO] [stderr]  --> src/lexer.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::fmt::Debug;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::fmt::Debug`
[INFO] [stderr]  --> src/tokens.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::fmt::Debug;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `first_char`
[INFO] [stderr]   --> src/lexer.rs:89:35
[INFO] [stderr]    |
[INFO] [stderr] 89 |     fn tokenize_number(&mut self, first_char: char) -> Token {
[INFO] [stderr]    |                                   ^^^^^^^^^^ help: consider prefixing with an underscore: `_first_char`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]    --> src/lexer.rs:124:43
[INFO] [stderr]     |
[INFO] [stderr] 124 |     fn tokenize_arith_operator(&mut self, i: u64, c: char) -> Token {
[INFO] [stderr]     |                                           ^ help: consider prefixing with an underscore: `_i`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `line`
[INFO] [stderr]    --> src/lexer.rs:135:13
[INFO] [stderr]     |
[INFO] [stderr] 135 |         let line = self.line;
[INFO] [stderr]     |             ^^^^ help: consider prefixing with an underscore: `_line`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `col`
[INFO] [stderr]    --> src/lexer.rs:136:13
[INFO] [stderr]     |
[INFO] [stderr] 136 |         let col = self.column;
[INFO] [stderr]     |             ^^^ help: consider prefixing with an underscore: `_col`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:10:9
[INFO] [stderr]    |
[INFO] [stderr] 10 |     let mut input: String;
[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: variant is never constructed: `Number`
[INFO] [stderr]   --> src/tokens.rs:23:5
[INFO] [stderr]    |
[INFO] [stderr] 23 |     Number(i32),
[INFO] [stderr]    |     ^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `tokenize_number`
[INFO] [stderr]   --> src/lexer.rs:89:5
[INFO] [stderr]    |
[INFO] [stderr] 89 |     fn tokenize_number(&mut self, first_char: char) -> Token {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `ArithOperators`
[INFO] [stderr]  --> src/tokens.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | pub enum ArithOperators {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `ComparisonOperators`
[INFO] [stderr]   --> src/tokens.rs:12:1
[INFO] [stderr]    |
[INFO] [stderr] 12 | pub enum ComparisonOperators {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `TokenType`
[INFO] [stderr]   --> src/tokens.rs:21:1
[INFO] [stderr]    |
[INFO] [stderr] 21 | pub enum TokenType {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.14s
[INFO] running `"docker" "inspect" "fd06e993364027469ca57716e3f0dc95bfc6af36a97f825798f9776cd60f5586"`
[INFO] running `"docker" "rm" "-f" "fd06e993364027469ca57716e3f0dc95bfc6af36a97f825798f9776cd60f5586"`
[INFO] [stdout] fd06e993364027469ca57716e3f0dc95bfc6af36a97f825798f9776cd60f5586
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/cronning9/math-lexer:/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" "+1.37.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 3f5d33a42edabfdd0bbde2e3db462688963095b1f6cacd2ce71cb081920e82cb
[INFO] running `"docker" "start" "-a" "3f5d33a42edabfdd0bbde2e3db462688963095b1f6cacd2ce71cb081920e82cb"`
[INFO] [stderr]    Compiling math-lexer v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `std::str::Chars`
[INFO] [stderr]  --> src/lexer.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::str::Chars;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::iter::Enumerate`
[INFO] [stderr]  --> src/lexer.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::iter::Enumerate;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::fmt::Debug`
[INFO] [stderr]  --> src/lexer.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::fmt::Debug;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::fmt::Debug`
[INFO] [stderr]  --> src/tokens.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::fmt::Debug;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `first_char`
[INFO] [stderr]   --> src/lexer.rs:89:35
[INFO] [stderr]    |
[INFO] [stderr] 89 |     fn tokenize_number(&mut self, first_char: char) -> Token {
[INFO] [stderr]    |                                   ^^^^^^^^^^ help: consider prefixing with an underscore: `_first_char`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]    --> src/lexer.rs:124:43
[INFO] [stderr]     |
[INFO] [stderr] 124 |     fn tokenize_arith_operator(&mut self, i: u64, c: char) -> Token {
[INFO] [stderr]     |                                           ^ help: consider prefixing with an underscore: `_i`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `line`
[INFO] [stderr]    --> src/lexer.rs:135:13
[INFO] [stderr]     |
[INFO] [stderr] 135 |         let line = self.line;
[INFO] [stderr]     |             ^^^^ help: consider prefixing with an underscore: `_line`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `col`
[INFO] [stderr]    --> src/lexer.rs:136:13
[INFO] [stderr]     |
[INFO] [stderr] 136 |         let col = self.column;
[INFO] [stderr]     |             ^^^ help: consider prefixing with an underscore: `_col`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:10:9
[INFO] [stderr]    |
[INFO] [stderr] 10 |     let mut input: String;
[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: variant is never constructed: `Number`
[INFO] [stderr]   --> src/tokens.rs:23:5
[INFO] [stderr]    |
[INFO] [stderr] 23 |     Number(i32),
[INFO] [stderr]    |     ^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `tokenize_number`
[INFO] [stderr]   --> src/lexer.rs:89:5
[INFO] [stderr]    |
[INFO] [stderr] 89 |     fn tokenize_number(&mut self, first_char: char) -> Token {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `ArithOperators`
[INFO] [stderr]  --> src/tokens.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | pub enum ArithOperators {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `ComparisonOperators`
[INFO] [stderr]   --> src/tokens.rs:12:1
[INFO] [stderr]    |
[INFO] [stderr] 12 | pub enum ComparisonOperators {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `TokenType`
[INFO] [stderr]   --> src/tokens.rs:21:1
[INFO] [stderr]    |
[INFO] [stderr] 21 | pub enum TokenType {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.60s
[INFO] running `"docker" "inspect" "3f5d33a42edabfdd0bbde2e3db462688963095b1f6cacd2ce71cb081920e82cb"`
[INFO] running `"docker" "rm" "-f" "3f5d33a42edabfdd0bbde2e3db462688963095b1f6cacd2ce71cb081920e82cb"`
[INFO] [stdout] 3f5d33a42edabfdd0bbde2e3db462688963095b1f6cacd2ce71cb081920e82cb
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/cronning9/math-lexer:/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" "+1.37.0" "test" "--frozen"`
[INFO] [stdout] 87c42514294cb4bb9e258a4b3e00595b683f29e16655bb2d61152ec796da905e
[INFO] running `"docker" "start" "-a" "87c42514294cb4bb9e258a4b3e00595b683f29e16655bb2d61152ec796da905e"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/math_lexer-8a035c0b08b52ed6
[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" "87c42514294cb4bb9e258a4b3e00595b683f29e16655bb2d61152ec796da905e"`
[INFO] running `"docker" "rm" "-f" "87c42514294cb4bb9e258a4b3e00595b683f29e16655bb2d61152ec796da905e"`
[INFO] [stdout] 87c42514294cb4bb9e258a4b3e00595b683f29e16655bb2d61152ec796da905e