[INFO] cloning repository https://github.com/michael-robbins/filemerger
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/michael-robbins/filemerger" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmichael-robbins%2Ffilemerger", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmichael-robbins%2Ffilemerger'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 4d71225f56ffa8ba8609693fcf7ef8f4f20a7ada
[INFO] testing michael-robbins/filemerger against 1.57.0 for beta-1.58-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmichael-robbins%2Ffilemerger" "/workspace/builds/worker-91/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-91/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/michael-robbins/filemerger on toolchain 1.57.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.57.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/michael-robbins/filemerger
[INFO] finished tweaking git repo https://github.com/michael-robbins/filemerger
[INFO] tweaked toml for git repo https://github.com/michael-robbins/filemerger written to /workspace/builds/worker-91/source/Cargo.toml
[INFO] crate git repo https://github.com/michael-robbins/filemerger already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.57.0" "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-91/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-91/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:a429bb59b7a3b4e7270a4b4c243bb115fc561d8f62ec34ef63a0a36cabf65dfd" "/opt/rustwide/cargo-home/bin/cargo" "+1.57.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8387ab638efd7a8685b8ec8899ad29769b4ae723bd36cd926c78f93e830fdd01
[INFO] running `Command { std: "docker" "start" "-a" "8387ab638efd7a8685b8ec8899ad29769b4ae723bd36cd926c78f93e830fdd01", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8387ab638efd7a8685b8ec8899ad29769b4ae723bd36cd926c78f93e830fdd01", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8387ab638efd7a8685b8ec8899ad29769b4ae723bd36cd926c78f93e830fdd01", kill_on_drop: false }`
[INFO] [stdout] 8387ab638efd7a8685b8ec8899ad29769b4ae723bd36cd926c78f93e830fdd01
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-91/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-91/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=warn" "-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:a429bb59b7a3b4e7270a4b4c243bb115fc561d8f62ec34ef63a0a36cabf65dfd" "/opt/rustwide/cargo-home/bin/cargo" "+1.57.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 35c576fa7b887676ac6e0da49a8cdd79508dd14c12b51b8f5f2a8e25567cc463
[INFO] running `Command { std: "docker" "start" "-a" "35c576fa7b887676ac6e0da49a8cdd79508dd14c12b51b8f5f2a8e25567cc463", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.43
[INFO] [stderr]    Compiling version_check v0.1.5
[INFO] [stderr]    Compiling cc v1.0.25
[INFO] [stderr]    Compiling cfg-if v0.1.6
[INFO] [stderr]    Compiling regex v1.0.5
[INFO] [stderr]    Compiling ucd-util v0.1.2
[INFO] [stderr]    Compiling utf8-ranges v1.0.2
[INFO] [stderr]    Compiling quick-error v1.2.2
[INFO] [stderr]    Compiling termcolor v1.0.4
[INFO] [stderr]    Compiling unicode-width v0.1.5
[INFO] [stderr]    Compiling byteorder v1.2.7
[INFO] [stderr]    Compiling linked-hash-map v0.5.1
[INFO] [stderr]    Compiling glob v0.2.11
[INFO] [stderr]    Compiling log v0.4.6
[INFO] [stderr]    Compiling humantime v1.1.1
[INFO] [stderr]    Compiling getopts v0.2.18
[INFO] [stderr]    Compiling regex-syntax v0.6.2
[INFO] [stderr]    Compiling yaml-rust v0.4.2
[INFO] [stderr]    Compiling memchr v2.1.1
[INFO] [stderr]    Compiling lazy_static v1.1.0
[INFO] [stderr]    Compiling atty v0.2.11
[INFO] [stderr]    Compiling memchr v1.0.2
[INFO] [stderr]    Compiling csv v0.15.0
[INFO] [stderr]    Compiling thread_local v0.3.6
[INFO] [stderr]    Compiling aho-corasick v0.6.9
[INFO] [stderr]    Compiling bzip2-sys v0.1.6
[INFO] [stderr]    Compiling miniz-sys v0.1.11
[INFO] [stderr]    Compiling flate2 v0.2.20
[INFO] [stderr]    Compiling bzip2 v0.3.3
[INFO] [stderr]    Compiling env_logger v0.5.13
[INFO] [stderr]    Compiling file-merger v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated macro `RustcDecodable`: rustc-serialize is deprecated and no longer supported
[INFO] [stdout]   --> src/merge_file_manager.rs:79:18
[INFO] [stdout]    |
[INFO] [stdout] 79 |         #[derive(RustcDecodable,Debug)]
[INFO] [stdout]    |                  ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/merge_file_manager.rs:96:32
[INFO] [stdout]    |
[INFO] [stdout] 96 |                 let metadata = try!(fs::metadata(filename));
[INFO] [stdout]    |                                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/merge_file.rs:29:32
[INFO] [stdout]    |
[INFO] [stdout] 29 |     lines: Lines<BufReader<Box<Read>>>,
[INFO] [stdout]    |                                ^^^^ help: use `dyn`: `dyn Read`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) 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 macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/merge_file.rs:58:20
[INFO] [stdout]    |
[INFO] [stdout] 58 |         let file = try!(File::open(filepath));
[INFO] [stdout]    |                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/merge_file.rs:59:24
[INFO] [stdout]    |
[INFO] [stdout] 59 |         let filesize = try!(file.metadata()).len();
[INFO] [stdout]    |                        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/merge_file.rs:62:31
[INFO] [stdout]    |
[INFO] [stdout] 62 |         let decompressor: Box<Read> = match file_ext.to_str() {
[INFO] [stdout]    |                               ^^^^ help: use `dyn`: `dyn Read`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) 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 macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/settings.rs:56:30
[INFO] [stdout]    |
[INFO] [stdout] 56 |         let delimiter_char = try!(self.parse_delimiter());
[INFO] [stdout]    |                              ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/settings.rs:57:25
[INFO] [stdout]    |
[INFO] [stdout] 57 |         let key_index = try!(self.parse_key_index());
[INFO] [stdout]    |                         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/settings.rs:58:28
[INFO] [stdout]    |
[INFO] [stdout] 58 |         let glob_choices = try!(self.parse_glob());
[INFO] [stdout]    |                            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/settings.rs:59:26
[INFO] [stdout]    |
[INFO] [stdout] 59 |         let cache_path = try!(self.parse_cache_file());
[INFO] [stdout]    |                          ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/settings.rs:68:25
[INFO] [stdout]    |
[INFO] [stdout] 68 |         let key_start = try!(self.parse_key_generic("key-start"));
[INFO] [stdout]    |                         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/settings.rs:69:23
[INFO] [stdout]    |
[INFO] [stdout] 69 |         let key_end = try!(self.parse_key_generic("key-end"));
[INFO] [stdout]    |                       ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/settings.rs:71:24
[INFO] [stdout]    |
[INFO] [stdout] 71 |         let key_type = try!(self.parse_key_type());
[INFO] [stdout]    |                        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `beginning_merge_key`
[INFO] [stdout]   --> src/merge_file_manager.rs:82:13
[INFO] [stdout]    |
[INFO] [stdout] 82 |             beginning_merge_key: String,
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> src/settings.rs:38:36
[INFO] [stdout]    |
[INFO] [stdout] 38 |             Err(failure) => panic!(failure.to_string()),
[INFO] [stdout]    |                                    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_fmt_panics)]` on by default
[INFO] [stdout]    = note: this usage of panic!() is deprecated; it will be a hard error in Rust 2021
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stdout] help: add a "{}" format string to Display the message
[INFO] [stdout]    |
[INFO] [stdout] 38 |             Err(failure) => panic!("{}", failure.to_string()),
[INFO] [stdout]    |                                    +++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 15 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 10.76s
[INFO] running `Command { std: "docker" "inspect" "35c576fa7b887676ac6e0da49a8cdd79508dd14c12b51b8f5f2a8e25567cc463", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "35c576fa7b887676ac6e0da49a8cdd79508dd14c12b51b8f5f2a8e25567cc463", kill_on_drop: false }`
[INFO] [stdout] 35c576fa7b887676ac6e0da49a8cdd79508dd14c12b51b8f5f2a8e25567cc463
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-91/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-91/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=warn" "-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:a429bb59b7a3b4e7270a4b4c243bb115fc561d8f62ec34ef63a0a36cabf65dfd" "/opt/rustwide/cargo-home/bin/cargo" "+1.57.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5045911d6e9875927f24c3387c3e78937297d09ed0581e7f3b5c7fc1ee7bbdcf
[INFO] running `Command { std: "docker" "start" "-a" "5045911d6e9875927f24c3387c3e78937297d09ed0581e7f3b5c7fc1ee7bbdcf", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling file-merger v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated macro `RustcDecodable`: rustc-serialize is deprecated and no longer supported
[INFO] [stdout]   --> src/merge_file_manager.rs:79:18
[INFO] [stdout]    |
[INFO] [stdout] 79 |         #[derive(RustcDecodable,Debug)]
[INFO] [stdout]    |                  ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/merge_file_manager.rs:96:32
[INFO] [stdout]    |
[INFO] [stdout] 96 |                 let metadata = try!(fs::metadata(filename));
[INFO] [stdout]    |                                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/merge_file.rs:29:32
[INFO] [stdout]    |
[INFO] [stdout] 29 |     lines: Lines<BufReader<Box<Read>>>,
[INFO] [stdout]    |                                ^^^^ help: use `dyn`: `dyn Read`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) 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 macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/merge_file.rs:58:20
[INFO] [stdout]    |
[INFO] [stdout] 58 |         let file = try!(File::open(filepath));
[INFO] [stdout]    |                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/merge_file.rs:59:24
[INFO] [stdout]    |
[INFO] [stdout] 59 |         let filesize = try!(file.metadata()).len();
[INFO] [stdout]    |                        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/merge_file.rs:62:31
[INFO] [stdout]    |
[INFO] [stdout] 62 |         let decompressor: Box<Read> = match file_ext.to_str() {
[INFO] [stdout]    |                               ^^^^ help: use `dyn`: `dyn Read`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) 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 macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/settings.rs:56:30
[INFO] [stdout]    |
[INFO] [stdout] 56 |         let delimiter_char = try!(self.parse_delimiter());
[INFO] [stdout]    |                              ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/settings.rs:57:25
[INFO] [stdout]    |
[INFO] [stdout] 57 |         let key_index = try!(self.parse_key_index());
[INFO] [stdout]    |                         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/settings.rs:58:28
[INFO] [stdout]    |
[INFO] [stdout] 58 |         let glob_choices = try!(self.parse_glob());
[INFO] [stdout]    |                            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/settings.rs:59:26
[INFO] [stdout]    |
[INFO] [stdout] 59 |         let cache_path = try!(self.parse_cache_file());
[INFO] [stdout]    |                          ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/settings.rs:68:25
[INFO] [stdout]    |
[INFO] [stdout] 68 |         let key_start = try!(self.parse_key_generic("key-start"));
[INFO] [stdout]    |                         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/settings.rs:69:23
[INFO] [stdout]    |
[INFO] [stdout] 69 |         let key_end = try!(self.parse_key_generic("key-end"));
[INFO] [stdout]    |                       ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/settings.rs:71:24
[INFO] [stdout]    |
[INFO] [stdout] 71 |         let key_type = try!(self.parse_key_type());
[INFO] [stdout]    |                        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `beginning_merge_key`
[INFO] [stdout]   --> src/merge_file_manager.rs:82:13
[INFO] [stdout]    |
[INFO] [stdout] 82 |             beginning_merge_key: String,
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> src/settings.rs:38:36
[INFO] [stdout]    |
[INFO] [stdout] 38 |             Err(failure) => panic!(failure.to_string()),
[INFO] [stdout]    |                                    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_fmt_panics)]` on by default
[INFO] [stdout]    = note: this usage of panic!() is deprecated; it will be a hard error in Rust 2021
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stdout] help: add a "{}" format string to Display the message
[INFO] [stdout]    |
[INFO] [stdout] 38 |             Err(failure) => panic!("{}", failure.to_string()),
[INFO] [stdout]    |                                    +++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 15 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 5.56s
[INFO] running `Command { std: "docker" "inspect" "5045911d6e9875927f24c3387c3e78937297d09ed0581e7f3b5c7fc1ee7bbdcf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5045911d6e9875927f24c3387c3e78937297d09ed0581e7f3b5c7fc1ee7bbdcf", kill_on_drop: false }`
[INFO] [stdout] 5045911d6e9875927f24c3387c3e78937297d09ed0581e7f3b5c7fc1ee7bbdcf
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-91/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-91/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=warn" "-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:a429bb59b7a3b4e7270a4b4c243bb115fc561d8f62ec34ef63a0a36cabf65dfd" "/opt/rustwide/cargo-home/bin/cargo" "+1.57.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 993f785ce74e0f43a56ea46104f229829bd6b184205c11b2f8c50db621fa877d
[INFO] running `Command { std: "docker" "start" "-a" "993f785ce74e0f43a56ea46104f229829bd6b184205c11b2f8c50db621fa877d", kill_on_drop: false }`
[INFO] [stderr] warning: use of deprecated macro `RustcDecodable`: rustc-serialize is deprecated and no longer supported
[INFO] [stderr]   --> src/merge_file_manager.rs:79:18
[INFO] [stderr]    |
[INFO] [stderr] 79 |         #[derive(RustcDecodable,Debug)]
[INFO] [stderr]    |                  ^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/merge_file_manager.rs:96:32
[INFO] [stderr]    |
[INFO] [stderr] 96 |                 let metadata = try!(fs::metadata(filename));
[INFO] [stderr]    |                                ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/merge_file.rs:29:32
[INFO] [stderr]    |
[INFO] [stderr] 29 |     lines: Lines<BufReader<Box<Read>>>,
[INFO] [stderr]    |                                ^^^^ help: use `dyn`: `dyn Read`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/merge_file.rs:58:20
[INFO] [stderr]    |
[INFO] [stderr] 58 |         let file = try!(File::open(filepath));
[INFO] [stderr]    |                    ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/merge_file.rs:59:24
[INFO] [stderr]    |
[INFO] [stderr] 59 |         let filesize = try!(file.metadata()).len();
[INFO] [stderr]    |                        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/merge_file.rs:62:31
[INFO] [stderr]    |
[INFO] [stderr] 62 |         let decompressor: Box<Read> = match file_ext.to_str() {
[INFO] [stderr]    |                               ^^^^ help: use `dyn`: `dyn Read`
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/settings.rs:56:30
[INFO] [stderr]    |
[INFO] [stderr] 56 |         let delimiter_char = try!(self.parse_delimiter());
[INFO] [stderr]    |                              ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/settings.rs:57:25
[INFO] [stderr]    |
[INFO] [stderr] 57 |         let key_index = try!(self.parse_key_index());
[INFO] [stderr]    |                         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/settings.rs:58:28
[INFO] [stderr]    |
[INFO] [stderr] 58 |         let glob_choices = try!(self.parse_glob());
[INFO] [stderr]    |                            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/settings.rs:59:26
[INFO] [stderr]    |
[INFO] [stderr] 59 |         let cache_path = try!(self.parse_cache_file());
[INFO] [stderr]    |                          ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/settings.rs:68:25
[INFO] [stderr]    |
[INFO] [stderr] 68 |         let key_start = try!(self.parse_key_generic("key-start"));
[INFO] [stderr]    |                         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/settings.rs:69:23
[INFO] [stderr]    |
[INFO] [stderr] 69 |         let key_end = try!(self.parse_key_generic("key-end"));
[INFO] [stderr]    |                       ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/settings.rs:71:24
[INFO] [stderr]    |
[INFO] [stderr] 71 |         let key_type = try!(self.parse_key_type());
[INFO] [stderr]    |                        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `beginning_merge_key`
[INFO] [stderr]   --> src/merge_file_manager.rs:82:13
[INFO] [stderr]    |
[INFO] [stderr] 82 |             beginning_merge_key: String,
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: panic message is not a string literal
[INFO] [stderr]   --> src/settings.rs:38:36
[INFO] [stderr]    |
[INFO] [stderr] 38 |             Err(failure) => panic!(failure.to_string()),
[INFO] [stderr]    |                                    ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(non_fmt_panics)]` on by default
[INFO] [stderr]    = note: this usage of panic!() is deprecated; it will be a hard error in Rust 2021
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stderr] help: add a "{}" format string to Display the message
[INFO] [stderr]    |
[INFO] [stderr] 38 |             Err(failure) => panic!("{}", failure.to_string()),
[INFO] [stderr]    |                                    +++++
[INFO] [stderr] 
[INFO] [stderr] warning: `file-merger` (bin "file-merger" test) generated 15 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.07s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/file_merger-bf5d757407d75032)
[INFO] [stdout] 
[INFO] [stdout] running 12 tests
[INFO] [stdout] test merge_file::tests::fast_forward_to_end ... ok
[INFO] [stdout] test merge_file::tests::new ... ok
[INFO] [stdout] test merge_file::tests::impl_formatting ... ok
[INFO] [stdout] test merge_file::tests::fast_forward ... ok
[INFO] [stdout] test merge_file::tests::impl_iterator ... ok
[INFO] [stdout] test merge_file::tests::impl_ordering_and_equality ... ok
[INFO] [stdout] test merge_file_manager::tests::new_merge_file ... ok
[INFO] [stdout] test merge_file_manager::tests::retrieve_from_glob ... ok
[INFO] [stdout] test merge_file_manager::tests::begin_merge ... ok
[INFO] [stdout] test merge_file_manager::tests::write_cache ... ok
[INFO] [stdout] test merge_file_manager::tests::retrieve_from_cache ... ok
[INFO] [stdout] test merge_file_manager::tests::cache_to_vec ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 12 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "993f785ce74e0f43a56ea46104f229829bd6b184205c11b2f8c50db621fa877d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "993f785ce74e0f43a56ea46104f229829bd6b184205c11b2f8c50db621fa877d", kill_on_drop: false }`
[INFO] [stdout] 993f785ce74e0f43a56ea46104f229829bd6b184205c11b2f8c50db621fa877d