[INFO] cloning repository https://github.com/kapitanov/rust-grep
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kapitanov/rust-grep" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkapitanov%2Frust-grep", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkapitanov%2Frust-grep'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 23d6a3d98837751c974061b13651432753ed0436
[INFO] checking kapitanov/rust-grep against master#8007b506ac5da629f223b755f5a5391edd5f6d01 for pr-88041
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkapitanov%2Frust-grep" "/workspace/builds/worker-76/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-76/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/kapitanov/rust-grep on toolchain 8007b506ac5da629f223b755f5a5391edd5f6d01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/kapitanov/rust-grep
[INFO] finished tweaking git repo https://github.com/kapitanov/rust-grep
[INFO] tweaked toml for git repo https://github.com/kapitanov/rust-grep written to /workspace/builds/worker-76/source/Cargo.toml
[INFO] crate git repo https://github.com/kapitanov/rust-grep already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-76/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-76/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] df53663a6a485220498cd458448a472bff1bcd767d7964c4c6d58af0c366f093
[INFO] running `Command { std: "docker" "start" "-a" "df53663a6a485220498cd458448a472bff1bcd767d7964c4c6d58af0c366f093", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "df53663a6a485220498cd458448a472bff1bcd767d7964c4c6d58af0c366f093", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "df53663a6a485220498cd458448a472bff1bcd767d7964c4c6d58af0c366f093", kill_on_drop: false }`
[INFO] [stdout] df53663a6a485220498cd458448a472bff1bcd767d7964c4c6d58af0c366f093
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-76/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-76/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 18f7d4de158fcab17d56fef366feefba43b1c00cbd1f71b7567f0f5169c56352
[INFO] running `Command { std: "docker" "start" "-a" "18f7d4de158fcab17d56fef366feefba43b1c00cbd1f71b7567f0f5169c56352", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling version_check v0.1.5
[INFO] [stderr]    Compiling libc v0.2.46
[INFO] [stderr]     Checking cfg-if v0.1.6
[INFO] [stderr]     Checking ucd-util v0.1.3
[INFO] [stderr]     Checking lazy_static v1.2.0
[INFO] [stderr]    Compiling regex v1.1.0
[INFO] [stderr]     Checking utf8-ranges v1.0.2
[INFO] [stderr]     Checking regex-syntax v0.6.4
[INFO] [stderr]    Compiling memchr v2.1.2
[INFO] [stderr]    Compiling unicase v2.2.0
[INFO] [stderr]     Checking thread_local v0.3.6
[INFO] [stderr]     Checking aho-corasick v0.6.9
[INFO] [stderr]     Checking rustgrep v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/grep.rs:17:72
[INFO] [stdout]    |
[INFO] [stdout] 17 |     fn try_create<'a>(&self, s: &str, ignore_case: bool) -> Result<Box<Pattern>, String>;
[INFO] [stdout]    |                                                                        ^^^^^^^ help: use `dyn`: `dyn Pattern`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/grep.rs:17:72
[INFO] [stdout]    |
[INFO] [stdout] 17 |     fn try_create<'a>(&self, s: &str, ignore_case: bool) -> Result<Box<Pattern>, String>;
[INFO] [stdout]    |                                                                        ^^^^^^^ help: use `dyn`: `dyn Pattern`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/grep.rs:21:23
[INFO] [stdout]    |
[INFO] [stdout] 21 |     patterns: Vec<Box<Pattern>>,
[INFO] [stdout]    |                       ^^^^^^^ help: use `dyn`: `dyn Pattern`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/grep.rs:31:35
[INFO] [stdout]    |
[INFO] [stdout] 31 |         let mut patterns: Vec<Box<Pattern>> = vec![];
[INFO] [stdout]    |                                   ^^^^^^^ help: use `dyn`: `dyn Pattern`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/grep.rs:129:30
[INFO] [stdout]     |
[INFO] [stdout] 129 |     fn instance<'a>() -> &'a PatternFactory {
[INFO] [stdout]     |                              ^^^^^^^^^^^^^^ help: use `dyn`: `dyn PatternFactory`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/grep.rs:139:72
[INFO] [stdout]     |
[INFO] [stdout] 139 |     fn try_create<'a>(&self, s: &str, ignore_case: bool) -> Result<Box<Pattern>, String> {
[INFO] [stdout]     |                                                                        ^^^^^^^ help: use `dyn`: `dyn Pattern`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/grep.rs:167:30
[INFO] [stdout]     |
[INFO] [stdout] 167 |     fn instance<'a>() -> &'a PatternFactory {
[INFO] [stdout]     |                              ^^^^^^^^^^^^^^ help: use `dyn`: `dyn PatternFactory`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/grep.rs:177:72
[INFO] [stdout]     |
[INFO] [stdout] 177 |     fn try_create<'a>(&self, s: &str, ignore_case: bool) -> Result<Box<Pattern>, String> {
[INFO] [stdout]     |                                                                        ^^^^^^^ help: use `dyn`: `dyn Pattern`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/grep.rs:21:23
[INFO] [stdout]    |
[INFO] [stdout] 21 |     patterns: Vec<Box<Pattern>>,
[INFO] [stdout]    |                       ^^^^^^^ help: use `dyn`: `dyn Pattern`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/grep.rs:31:35
[INFO] [stdout]    |
[INFO] [stdout] 31 |         let mut patterns: Vec<Box<Pattern>> = vec![];
[INFO] [stdout]    |                                   ^^^^^^^ help: use `dyn`: `dyn Pattern`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/grep.rs:129:30
[INFO] [stdout]     |
[INFO] [stdout] 129 |     fn instance<'a>() -> &'a PatternFactory {
[INFO] [stdout]     |                              ^^^^^^^^^^^^^^ help: use `dyn`: `dyn PatternFactory`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/grep.rs:139:72
[INFO] [stdout]     |
[INFO] [stdout] 139 |     fn try_create<'a>(&self, s: &str, ignore_case: bool) -> Result<Box<Pattern>, String> {
[INFO] [stdout]     |                                                                        ^^^^^^^ help: use `dyn`: `dyn Pattern`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/grep.rs:167:30
[INFO] [stdout]     |
[INFO] [stdout] 167 |     fn instance<'a>() -> &'a PatternFactory {
[INFO] [stdout]     |                              ^^^^^^^^^^^^^^ help: use `dyn`: `dyn PatternFactory`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/grep.rs:177:72
[INFO] [stdout]     |
[INFO] [stdout] 177 |     fn try_create<'a>(&self, s: &str, ignore_case: bool) -> Result<Box<Pattern>, String> {
[INFO] [stdout]     |                                                                        ^^^^^^^ help: use `dyn`: `dyn Pattern`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]    --> src/grep.rs:184:42
[INFO] [stdout]     |
[INFO] [stdout] 184 |                 let err = String::from(e.description());
[INFO] [stdout]     |                                          ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]    --> src/grep.rs:184:42
[INFO] [stdout]     |
[INFO] [stdout] 184 |                 let err = String::from(e.description());
[INFO] [stdout]     |                                          ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 32.24s
[INFO] running `Command { std: "docker" "inspect" "18f7d4de158fcab17d56fef366feefba43b1c00cbd1f71b7567f0f5169c56352", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "18f7d4de158fcab17d56fef366feefba43b1c00cbd1f71b7567f0f5169c56352", kill_on_drop: false }`
[INFO] [stdout] 18f7d4de158fcab17d56fef366feefba43b1c00cbd1f71b7567f0f5169c56352