[INFO] updating cached repository ilsko/femto
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/ilsko/femto
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/ilsko/femto" "work/ex/beta-1.38-1/sources/1.37.0/gh/ilsko/femto"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/ilsko/femto'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/ilsko/femto" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ilsko/femto"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ilsko/femto'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 7c08ece02c4273a6002d5f92b49233d8661e64df
[INFO] sha for GitHub repo ilsko/femto: 7c08ece02c4273a6002d5f92b49233d8661e64df
[INFO] validating manifest of ilsko/femto 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 ilsko/femto 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 ilsko/femto
[INFO] finished frobbing ilsko/femto
[INFO] frobbed toml for ilsko/femto written to work/ex/beta-1.38-1/sources/1.37.0/gh/ilsko/femto/Cargo.toml
[INFO] started frobbing ilsko/femto
[INFO] finished frobbing ilsko/femto
[INFO] frobbed toml for ilsko/femto written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ilsko/femto/Cargo.toml
[INFO] crate ilsko/femto 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 ilsko/femto 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-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/ilsko/femto:/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] 3c18b5b5a89224697b4dcd07758a00baa501083eb0e7b32bdc3639efc9950f2b
[INFO] running `"docker" "start" "-a" "3c18b5b5a89224697b4dcd07758a00baa501083eb0e7b32bdc3639efc9950f2b"`
[INFO] [stderr]    Compiling syn v0.15.34
[INFO] [stderr]    Compiling structopt-derive v0.2.16
[INFO] [stderr]    Compiling structopt v0.2.16
[INFO] [stderr]    Compiling femto v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `path`
[INFO] [stderr]   --> src/text_buffer.rs:11:16
[INFO] [stderr]    |
[INFO] [stderr] 11 |     pub fn new(path: Option<PathBuf>) -> Self {
[INFO] [stderr]    |                ^^^^ help: consider prefixing with an underscore: `_path`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `file`
[INFO] [stderr]  --> src/text_buffer.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 |     file: File,
[INFO] [stderr]   |     ^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `data`
[INFO] [stderr]  --> src/text_buffer.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 |     data: Vec<Segment>,
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/text_buffer.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 |     pub fn new(path: Option<PathBuf>) -> Self {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/text_buffer.rs:43:5
[INFO] [stderr]    |
[INFO] [stderr] 43 |     pub fn new() -> Self {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `add`
[INFO] [stderr]   --> src/text_buffer.rs:51:5
[INFO] [stderr]    |
[INFO] [stderr] 51 |     pub fn add(&mut self, index: usize, character: u8) -> Result<()> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `remove`
[INFO] [stderr]   --> src/text_buffer.rs:61:5
[INFO] [stderr]    |
[INFO] [stderr] 61 |     pub fn remove(&mut self, index: usize) -> Result<()> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `modify`
[INFO] [stderr]   --> src/text_buffer.rs:71:5
[INFO] [stderr]    |
[INFO] [stderr] 71 |     pub fn modify(&mut self, index: usize, new_character: u8) -> Result<()> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `stdin`
[INFO] [stderr]   --> src/lib.rs:30:5
[INFO] [stderr]    |
[INFO] [stderr] 30 |     stdin: R,
[INFO] [stderr]    |     ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 16.16s
[INFO] running `"docker" "inspect" "3c18b5b5a89224697b4dcd07758a00baa501083eb0e7b32bdc3639efc9950f2b"`
[INFO] running `"docker" "rm" "-f" "3c18b5b5a89224697b4dcd07758a00baa501083eb0e7b32bdc3639efc9950f2b"`
[INFO] [stdout] 3c18b5b5a89224697b4dcd07758a00baa501083eb0e7b32bdc3639efc9950f2b
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/ilsko/femto:/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] 24193bd10eed2c3cccee696c633c66217af05cce52a34f51d2f863d9213d8cf3
[INFO] running `"docker" "start" "-a" "24193bd10eed2c3cccee696c633c66217af05cce52a34f51d2f863d9213d8cf3"`
[INFO] [stderr]    Compiling femto v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `path`
[INFO] [stderr]   --> src/text_buffer.rs:11:16
[INFO] [stderr]    |
[INFO] [stderr] 11 |     pub fn new(path: Option<PathBuf>) -> Self {
[INFO] [stderr]    |                ^^^^ help: consider prefixing with an underscore: `_path`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `file`
[INFO] [stderr]  --> src/text_buffer.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 |     file: File,
[INFO] [stderr]   |     ^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `data`
[INFO] [stderr]  --> src/text_buffer.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 |     data: Vec<Segment>,
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/text_buffer.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 |     pub fn new(path: Option<PathBuf>) -> Self {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/text_buffer.rs:43:5
[INFO] [stderr]    |
[INFO] [stderr] 43 |     pub fn new() -> Self {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `add`
[INFO] [stderr]   --> src/text_buffer.rs:51:5
[INFO] [stderr]    |
[INFO] [stderr] 51 |     pub fn add(&mut self, index: usize, character: u8) -> Result<()> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `remove`
[INFO] [stderr]   --> src/text_buffer.rs:61:5
[INFO] [stderr]    |
[INFO] [stderr] 61 |     pub fn remove(&mut self, index: usize) -> Result<()> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `modify`
[INFO] [stderr]   --> src/text_buffer.rs:71:5
[INFO] [stderr]    |
[INFO] [stderr] 71 |     pub fn modify(&mut self, index: usize, new_character: u8) -> Result<()> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `stdin`
[INFO] [stderr]   --> src/lib.rs:30:5
[INFO] [stderr]    |
[INFO] [stderr] 30 |     stdin: R,
[INFO] [stderr]    |     ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.32s
[INFO] running `"docker" "inspect" "24193bd10eed2c3cccee696c633c66217af05cce52a34f51d2f863d9213d8cf3"`
[INFO] running `"docker" "rm" "-f" "24193bd10eed2c3cccee696c633c66217af05cce52a34f51d2f863d9213d8cf3"`
[INFO] [stdout] 24193bd10eed2c3cccee696c633c66217af05cce52a34f51d2f863d9213d8cf3
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/ilsko/femto:/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] b35397afd0d11e997799b4e6fcd38bc3c40c23e6c40a4c55136f73db2fcbae34
[INFO] running `"docker" "start" "-a" "b35397afd0d11e997799b4e6fcd38bc3c40c23e6c40a4c55136f73db2fcbae34"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/femto-90e19c8adb250b52
[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] [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] [stderr]      Running /opt/crater/target/debug/deps/femto-946f66a933316f62
[INFO] [stderr]    Doc-tests femto
[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" "b35397afd0d11e997799b4e6fcd38bc3c40c23e6c40a4c55136f73db2fcbae34"`
[INFO] running `"docker" "rm" "-f" "b35397afd0d11e997799b4e6fcd38bc3c40c23e6c40a4c55136f73db2fcbae34"`
[INFO] [stdout] b35397afd0d11e997799b4e6fcd38bc3c40c23e6c40a4c55136f73db2fcbae34