[INFO] crate copperline 0.3.0 is already in cache
[INFO] extracting crate copperline 0.3.0 into work/ex/beta-1.37-6/sources/1.36.0/reg/copperline/0.3.0
[INFO] extracting crate copperline 0.3.0 into work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/copperline/0.3.0
[INFO] validating manifest of copperline-0.3.0 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 copperline-0.3.0 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 copperline-0.3.0
[INFO] finished frobbing copperline-0.3.0
[INFO] frobbed toml for copperline-0.3.0 written to work/ex/beta-1.37-6/sources/1.36.0/reg/copperline/0.3.0/Cargo.toml
[INFO] started frobbing copperline-0.3.0
[INFO] finished frobbing copperline-0.3.0
[INFO] frobbed toml for copperline-0.3.0 written to work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/copperline/0.3.0/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[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 copperline-0.3.0 against beta-2019-07-23 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-5/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/copperline/0.3.0:/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-2019-07-23" "build" "--frozen"`
[INFO] [stdout] 5092d68c49e84e4a1e99d6ae7984eeccd66cd184ca6b199d02aee325054d6584
[INFO] running `"docker" "start" "-a" "5092d68c49e84e4a1e99d6ae7984eeccd66cd184ca6b199d02aee325054d6584"`
[INFO] [stderr]    Compiling nix v0.4.3
[INFO] [stderr]    Compiling strcursor v0.1.0
[INFO] [stderr]    Compiling copperline v0.3.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unnecessary parentheses around `for` head expression
[INFO] [stderr]   --> src/lib.rs:61:26
[INFO] [stderr]    |
[INFO] [stderr] 61 |                 for _ in (0..len) {
[INFO] [stderr]    |                          ^^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_parens)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` head expression
[INFO] [stderr]    --> src/lib.rs:109:26
[INFO] [stderr]     |
[INFO] [stderr] 109 |                 for _ in (0..len) {
[INFO] [stderr]     |                          ^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `RawDecoder`
[INFO] [stderr]  --> src/parser.rs:3:36
[INFO] [stderr]   |
[INFO] [stderr] 3 | use encoding::types::{EncodingRef, RawDecoder};
[INFO] [stderr]   |                                    ^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `reset`
[INFO] [stderr]   --> src/buffer.rs:29:5
[INFO] [stderr]    |
[INFO] [stderr] 29 |     pub fn reset(&mut self) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `pop`
[INFO] [stderr]   --> src/history.rs:67:5
[INFO] [stderr]    |
[INFO] [stderr] 67 |     pub fn pop(&mut self) -> Option<String> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.30s
[INFO] running `"docker" "inspect" "5092d68c49e84e4a1e99d6ae7984eeccd66cd184ca6b199d02aee325054d6584"`
[INFO] running `"docker" "rm" "-f" "5092d68c49e84e4a1e99d6ae7984eeccd66cd184ca6b199d02aee325054d6584"`
[INFO] [stdout] 5092d68c49e84e4a1e99d6ae7984eeccd66cd184ca6b199d02aee325054d6584
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-5/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/copperline/0.3.0:/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-2019-07-23" "test" "--frozen" "--no-run"`
[INFO] [stdout] 01e4547df5f2fb64fd7a25143dde7a3aa111d2efe269732fe2dfcef46ed9be39
[INFO] running `"docker" "start" "-a" "01e4547df5f2fb64fd7a25143dde7a3aa111d2efe269732fe2dfcef46ed9be39"`
[INFO] [stderr]    Compiling copperline v0.3.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unnecessary parentheses around `for` head expression
[INFO] [stderr]   --> src/lib.rs:61:26
[INFO] [stderr]    |
[INFO] [stderr] 61 |                 for _ in (0..len) {
[INFO] [stderr]    |                          ^^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_parens)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` head expression
[INFO] [stderr]    --> src/lib.rs:109:26
[INFO] [stderr]     |
[INFO] [stderr] 109 |                 for _ in (0..len) {
[INFO] [stderr]     |                          ^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `RawDecoder`
[INFO] [stderr]  --> src/parser.rs:3:36
[INFO] [stderr]   |
[INFO] [stderr] 3 | use encoding::types::{EncodingRef, RawDecoder};
[INFO] [stderr]   |                                    ^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `reset`
[INFO] [stderr]   --> src/buffer.rs:29:5
[INFO] [stderr]    |
[INFO] [stderr] 29 |     pub fn reset(&mut self) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `pop`
[INFO] [stderr]   --> src/history.rs:67:5
[INFO] [stderr]    |
[INFO] [stderr] 67 |     pub fn pop(&mut self) -> Option<String> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.06s
[INFO] running `"docker" "inspect" "01e4547df5f2fb64fd7a25143dde7a3aa111d2efe269732fe2dfcef46ed9be39"`
[INFO] running `"docker" "rm" "-f" "01e4547df5f2fb64fd7a25143dde7a3aa111d2efe269732fe2dfcef46ed9be39"`
[INFO] [stdout] 01e4547df5f2fb64fd7a25143dde7a3aa111d2efe269732fe2dfcef46ed9be39
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-5/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/copperline/0.3.0:/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-2019-07-23" "test" "--frozen"`
[INFO] [stdout] c84c84f1f059f5ed354899ebb19134e7e36e9b6a9e355c6e761b92ab57bf983a
[INFO] running `"docker" "start" "-a" "c84c84f1f059f5ed354899ebb19134e7e36e9b6a9e355c6e761b92ab57bf983a"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/copperline-ad914778f244fb5a
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test buffer::move_and_insert_ascii ... ok
[INFO] [stdout] test buffer::move_and_insert_cyrillic ... ok
[INFO] [stdout] test buffer::move_and_insert_cjk ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests copperline
[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" "c84c84f1f059f5ed354899ebb19134e7e36e9b6a9e355c6e761b92ab57bf983a"`
[INFO] running `"docker" "rm" "-f" "c84c84f1f059f5ed354899ebb19134e7e36e9b6a9e355c6e761b92ab57bf983a"`
[INFO] [stdout] c84c84f1f059f5ed354899ebb19134e7e36e9b6a9e355c6e761b92ab57bf983a