[INFO] crate quill-delta 0.0.1 is already in cache
[INFO] extracting crate quill-delta 0.0.1 into work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/reg/quill-delta/0.0.1
[INFO] extracting crate quill-delta 0.0.1 into work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/reg/quill-delta/0.0.1
[INFO] validating manifest of quill-delta-0.0.1 on toolchain master#60960a260f7b5c695fd0717311d72ce62dd4eb43
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of quill-delta-0.0.1 on toolchain try#266783e4e09e4e9d5307c1c8e695659c58bbcac7
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing quill-delta-0.0.1
[INFO] finished frobbing quill-delta-0.0.1
[INFO] frobbed toml for quill-delta-0.0.1 written to work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/reg/quill-delta/0.0.1/Cargo.toml
[INFO] started frobbing quill-delta-0.0.1
[INFO] finished frobbing quill-delta-0.0.1
[INFO] frobbed toml for quill-delta-0.0.1 written to work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/reg/quill-delta/0.0.1/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking quill-delta-0.0.1 against try#266783e4e09e4e9d5307c1c8e695659c58bbcac7 for pr-63376
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-63376/worker-1/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/reg/quill-delta/0.0.1:/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=forbid" "-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" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 9f8ec947eefdad9bcfb13b194e62989f6e1f3b999d27ad81fc9188218da16e37
[INFO] running `"docker" "start" "-a" "9f8ec947eefdad9bcfb13b194e62989f6e1f3b999d27ad81fc9188218da16e37"`
[INFO] [stderr]     Checking quill-delta v0.0.1 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `text`
[INFO] [stderr]   --> src/lib.rs:40:46
[INFO] [stderr]    |
[INFO] [stderr] 40 |     pub fn insert<S: Into<String>>(mut self, text: S, attributes: Attributes) -> Self {
[INFO] [stderr]    |                                              ^^^^ help: consider prefixing with an underscore: `_text`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `attributes`
[INFO] [stderr]   --> src/lib.rs:40:55
[INFO] [stderr]    |
[INFO] [stderr] 40 |     pub fn insert<S: Into<String>>(mut self, text: S, attributes: Attributes) -> Self {
[INFO] [stderr]    |                                                       ^^^^^^^^^^ help: consider prefixing with an underscore: `_attributes`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `length`
[INFO] [stderr]   --> src/lib.rs:44:29
[INFO] [stderr]    |
[INFO] [stderr] 44 |     pub fn delete(mut self, length: usize) -> Self {
[INFO] [stderr]    |                             ^^^^^^ help: consider prefixing with an underscore: `_length`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `length`
[INFO] [stderr]   --> src/lib.rs:48:29
[INFO] [stderr]    |
[INFO] [stderr] 48 |     pub fn retain(mut self, length: usize, attributes: Attributes) -> Self {
[INFO] [stderr]    |                             ^^^^^^ help: consider prefixing with an underscore: `_length`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `attributes`
[INFO] [stderr]   --> src/lib.rs:48:44
[INFO] [stderr]    |
[INFO] [stderr] 48 |     pub fn retain(mut self, length: usize, attributes: Attributes) -> Self {
[INFO] [stderr]    |                                            ^^^^^^^^^^ help: consider prefixing with an underscore: `_attributes`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `op`
[INFO] [stderr]   --> src/lib.rs:52:27
[INFO] [stderr]    |
[INFO] [stderr] 52 |     pub fn push(mut self, op: DeltaOperation) -> Self {
[INFO] [stderr]    |                           ^^ help: consider prefixing with an underscore: `_op`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/lib.rs:40:36
[INFO] [stderr]    |
[INFO] [stderr] 40 |     pub fn insert<S: Into<String>>(mut self, text: S, attributes: Attributes) -> Self {
[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: variable does not need to be mutable
[INFO] [stderr]   --> src/lib.rs:44:19
[INFO] [stderr]    |
[INFO] [stderr] 44 |     pub fn delete(mut self, length: usize) -> Self {
[INFO] [stderr]    |                   ----^^^^
[INFO] [stderr]    |                   |
[INFO] [stderr]    |                   help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/lib.rs:48:19
[INFO] [stderr]    |
[INFO] [stderr] 48 |     pub fn retain(mut self, length: usize, attributes: Attributes) -> Self {
[INFO] [stderr]    |                   ----^^^^
[INFO] [stderr]    |                   |
[INFO] [stderr]    |                   help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/lib.rs:52:17
[INFO] [stderr]    |
[INFO] [stderr] 52 |     pub fn push(mut self, op: DeltaOperation) -> Self {
[INFO] [stderr]    |                 ----^^^^
[INFO] [stderr]    |                 |
[INFO] [stderr]    |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/lib.rs:56:17
[INFO] [stderr]    |
[INFO] [stderr] 56 |     pub fn chop(mut self) {}
[INFO] [stderr]    |                 ----^^^^
[INFO] [stderr]    |                 |
[INFO] [stderr]    |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `op`
[INFO] [stderr]    --> src/lib.rs:181:9
[INFO] [stderr]     |
[INFO] [stderr] 181 |     let op: DeltaOperation = serde_json::from_str(r#"{ "insert": "Hallo" }"#).unwrap();
[INFO] [stderr]     |         ^^ help: consider prefixing with an underscore: `_op`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `op`
[INFO] [stderr]    --> src/lib.rs:182:9
[INFO] [stderr]     |
[INFO] [stderr] 182 |     let op: DeltaOperation = serde_json::from_str(r#"{ "retain": 10 }"#).unwrap();
[INFO] [stderr]     |         ^^ help: consider prefixing with an underscore: `_op`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `op`
[INFO] [stderr]    --> src/lib.rs:183:9
[INFO] [stderr]     |
[INFO] [stderr] 183 |     let op: DeltaOperation = serde_json::from_str(r#"{ "delete": 10 }"#).unwrap();
[INFO] [stderr]     |         ^^ help: consider prefixing with an underscore: `_op`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `text`
[INFO] [stderr]   --> src/lib.rs:40:46
[INFO] [stderr]    |
[INFO] [stderr] 40 |     pub fn insert<S: Into<String>>(mut self, text: S, attributes: Attributes) -> Self {
[INFO] [stderr]    |                                              ^^^^ help: consider prefixing with an underscore: `_text`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `attributes`
[INFO] [stderr]   --> src/lib.rs:40:55
[INFO] [stderr]    |
[INFO] [stderr] 40 |     pub fn insert<S: Into<String>>(mut self, text: S, attributes: Attributes) -> Self {
[INFO] [stderr]    |                                                       ^^^^^^^^^^ help: consider prefixing with an underscore: `_attributes`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `length`
[INFO] [stderr]   --> src/lib.rs:44:29
[INFO] [stderr]    |
[INFO] [stderr] 44 |     pub fn delete(mut self, length: usize) -> Self {
[INFO] [stderr]    |                             ^^^^^^ help: consider prefixing with an underscore: `_length`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `length`
[INFO] [stderr]   --> src/lib.rs:48:29
[INFO] [stderr]    |
[INFO] [stderr] 48 |     pub fn retain(mut self, length: usize, attributes: Attributes) -> Self {
[INFO] [stderr]    |                             ^^^^^^ help: consider prefixing with an underscore: `_length`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `attributes`
[INFO] [stderr]   --> src/lib.rs:48:44
[INFO] [stderr]    |
[INFO] [stderr] 48 |     pub fn retain(mut self, length: usize, attributes: Attributes) -> Self {
[INFO] [stderr]    |                                            ^^^^^^^^^^ help: consider prefixing with an underscore: `_attributes`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `op`
[INFO] [stderr]   --> src/lib.rs:52:27
[INFO] [stderr]    |
[INFO] [stderr] 52 |     pub fn push(mut self, op: DeltaOperation) -> Self {
[INFO] [stderr]    |                           ^^ help: consider prefixing with an underscore: `_op`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/lib.rs:40:36
[INFO] [stderr]    |
[INFO] [stderr] 40 |     pub fn insert<S: Into<String>>(mut self, text: S, attributes: Attributes) -> Self {
[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: variable does not need to be mutable
[INFO] [stderr]   --> src/lib.rs:44:19
[INFO] [stderr]    |
[INFO] [stderr] 44 |     pub fn delete(mut self, length: usize) -> Self {
[INFO] [stderr]    |                   ----^^^^
[INFO] [stderr]    |                   |
[INFO] [stderr]    |                   help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/lib.rs:48:19
[INFO] [stderr]    |
[INFO] [stderr] 48 |     pub fn retain(mut self, length: usize, attributes: Attributes) -> Self {
[INFO] [stderr]    |                   ----^^^^
[INFO] [stderr]    |                   |
[INFO] [stderr]    |                   help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/lib.rs:52:17
[INFO] [stderr]    |
[INFO] [stderr] 52 |     pub fn push(mut self, op: DeltaOperation) -> Self {
[INFO] [stderr]    |                 ----^^^^
[INFO] [stderr]    |                 |
[INFO] [stderr]    |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/lib.rs:56:17
[INFO] [stderr]    |
[INFO] [stderr] 56 |     pub fn chop(mut self) {}
[INFO] [stderr]    |                 ----^^^^
[INFO] [stderr]    |                 |
[INFO] [stderr]    |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.76s
[INFO] running `"docker" "inspect" "9f8ec947eefdad9bcfb13b194e62989f6e1f3b999d27ad81fc9188218da16e37"`
[INFO] running `"docker" "rm" "-f" "9f8ec947eefdad9bcfb13b194e62989f6e1f3b999d27ad81fc9188218da16e37"`
[INFO] [stdout] 9f8ec947eefdad9bcfb13b194e62989f6e1f3b999d27ad81fc9188218da16e37