[INFO] crate carnix 0.9.6 is already in cache
[INFO] extracting crate carnix 0.9.6 into work/ex/pr-58948/sources/master#0f88167f89fffe321590c5148f21b7d51d44388d/reg/carnix/0.9.6
[INFO] extracting crate carnix 0.9.6 into work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/reg/carnix/0.9.6
[INFO] validating manifest of carnix-0.9.6 on toolchain master#0f88167f89fffe321590c5148f21b7d51d44388d
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+0f88167f89fffe321590c5148f21b7d51d44388d-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of carnix-0.9.6 on toolchain try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing carnix-0.9.6
[INFO] finished frobbing carnix-0.9.6
[INFO] frobbed toml for carnix-0.9.6 written to work/ex/pr-58948/sources/master#0f88167f89fffe321590c5148f21b7d51d44388d/reg/carnix/0.9.6/Cargo.toml
[INFO] started frobbing carnix-0.9.6
[INFO] finished frobbing carnix-0.9.6
[INFO] frobbed toml for carnix-0.9.6 written to work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/reg/carnix/0.9.6/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+0f88167f89fffe321590c5148f21b7d51d44388d-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+0f88167f89fffe321590c5148f21b7d51d44388d-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking carnix-0.9.6 against try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b for pr-58948
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-58948/worker-1/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/reg/carnix/0.9.6:/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" "+a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] a663f22bab7425a227c75a7ec6fccff7eefe099f342c5a0d6e5e89ac80a88ed0
[INFO] running `"docker" "start" "-a" "a663f22bab7425a227c75a7ec6fccff7eefe099f342c5a0d6e5e89ac80a88ed0"`
[INFO] [stderr]     Checking carnix v0.9.6 (/opt/crater/workdir)
[INFO] [stderr] warning: use of deprecated item 'core::str::<impl str>::trim_right_matches': superseded by `trim_end_matches`
[INFO] [stderr]    --> src/output.rs:881:77
[INFO] [stderr]     |
[INFO] [stderr] 881 |                             writeln!(w, "{}  {}.{}", indent, current_prefix.trim_right_matches('.'), current_attrs.pop().unwrap())?;
[INFO] [stderr]     |                                                                             ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(deprecated)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'core::str::<impl str>::trim_right_matches': superseded by `trim_end_matches`
[INFO] [stderr]    --> src/output.rs:883:104
[INFO] [stderr]     |
[INFO] [stderr] 883 |                             writeln!(w, "{}  {} = fold recursiveUpdate {{}} [", indent, current_prefix.trim_right_matches('.'))?;
[INFO] [stderr]     |                                                                                                        ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'core::str::<impl str>::trim_left_matches': superseded by `trim_start_matches`
[INFO] [stderr]    --> src/output.rs:901:62
[INFO] [stderr]     |
[INFO] [stderr] 901 |                     current_attrs.push(format!("{} = {};", a.trim_left_matches(current_prefix), b[0]))
[INFO] [stderr]     |                                                              ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'core::str::<impl str>::trim_left_matches': superseded by `trim_start_matches`
[INFO] [stderr]    --> src/output.rs:903:81
[INFO] [stderr]     |
[INFO] [stderr] 903 |                     current_attrs.push(format!("{} = (f.{} or false) || {};", a.trim_left_matches(current_prefix), a, b[0]))
[INFO] [stderr]     |                                                                                 ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'core::str::<impl str>::trim_left_matches': superseded by `trim_start_matches`
[INFO] [stderr]    --> src/output.rs:906:75
[INFO] [stderr]     |
[INFO] [stderr] 906 |                     current_attrs.push(format!("{} = (f.{} or false);", a.trim_left_matches(current_prefix), a))
[INFO] [stderr]     |                                                                           ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'core::str::<impl str>::trim_left_matches': superseded by `trim_start_matches`
[INFO] [stderr]    --> src/output.rs:909:72
[INFO] [stderr]     |
[INFO] [stderr] 909 |                 let mut x = format!("{} =\n{}      (f.{} or false)", a.trim_left_matches(current_prefix), indent, a);
[INFO] [stderr]     |                                                                        ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'core::str::<impl str>::trim_right_matches': superseded by `trim_end_matches`
[INFO] [stderr]    --> src/output.rs:920:65
[INFO] [stderr]     |
[INFO] [stderr] 920 |                 writeln!(w, "{}  {}.{}", indent, current_prefix.trim_right_matches('.'), current_attrs.pop().unwrap())?;
[INFO] [stderr]     |                                                                 ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'core::str::<impl str>::trim_right_matches': superseded by `trim_end_matches`
[INFO] [stderr]    --> src/output.rs:922:92
[INFO] [stderr]     |
[INFO] [stderr] 922 |                 writeln!(w, "{}  {} = fold recursiveUpdate {{}} [", indent, current_prefix.trim_right_matches('.'))?;
[INFO] [stderr]     |                                                                                            ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::cause': replaced by Error::source, which can support downcasting
[INFO] [stderr]   --> src/error.rs:2:1
[INFO] [stderr]    |
[INFO] [stderr] 2  | / error_chain!{
[INFO] [stderr] 3  | |     foreign_links {
[INFO] [stderr] 4  | |         Io(::std::io::Error);
[INFO] [stderr] 5  | |         Utf8(::std::string::FromUtf8Error);
[INFO] [stderr] ...  |
[INFO] [stderr] 20 | |     }
[INFO] [stderr] 21 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'core::str::<impl str>::trim_right_matches': superseded by `trim_end_matches`
[INFO] [stderr]    --> src/output.rs:881:77
[INFO] [stderr]     |
[INFO] [stderr] 881 |                             writeln!(w, "{}  {}.{}", indent, current_prefix.trim_right_matches('.'), current_attrs.pop().unwrap())?;
[INFO] [stderr]     |                                                                             ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(deprecated)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'core::str::<impl str>::trim_right_matches': superseded by `trim_end_matches`
[INFO] [stderr]    --> src/output.rs:883:104
[INFO] [stderr]     |
[INFO] [stderr] 883 |                             writeln!(w, "{}  {} = fold recursiveUpdate {{}} [", indent, current_prefix.trim_right_matches('.'))?;
[INFO] [stderr]     |                                                                                                        ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'core::str::<impl str>::trim_left_matches': superseded by `trim_start_matches`
[INFO] [stderr]    --> src/output.rs:901:62
[INFO] [stderr]     |
[INFO] [stderr] 901 |                     current_attrs.push(format!("{} = {};", a.trim_left_matches(current_prefix), b[0]))
[INFO] [stderr]     |                                                              ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'core::str::<impl str>::trim_left_matches': superseded by `trim_start_matches`
[INFO] [stderr]    --> src/output.rs:903:81
[INFO] [stderr]     |
[INFO] [stderr] 903 |                     current_attrs.push(format!("{} = (f.{} or false) || {};", a.trim_left_matches(current_prefix), a, b[0]))
[INFO] [stderr]     |                                                                                 ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'core::str::<impl str>::trim_left_matches': superseded by `trim_start_matches`
[INFO] [stderr]    --> src/output.rs:906:75
[INFO] [stderr]     |
[INFO] [stderr] 906 |                     current_attrs.push(format!("{} = (f.{} or false);", a.trim_left_matches(current_prefix), a))
[INFO] [stderr]     |                                                                           ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'core::str::<impl str>::trim_left_matches': superseded by `trim_start_matches`
[INFO] [stderr]    --> src/output.rs:909:72
[INFO] [stderr]     |
[INFO] [stderr] 909 |                 let mut x = format!("{} =\n{}      (f.{} or false)", a.trim_left_matches(current_prefix), indent, a);
[INFO] [stderr]     |                                                                        ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'core::str::<impl str>::trim_right_matches': superseded by `trim_end_matches`
[INFO] [stderr]    --> src/output.rs:920:65
[INFO] [stderr]     |
[INFO] [stderr] 920 |                 writeln!(w, "{}  {}.{}", indent, current_prefix.trim_right_matches('.'), current_attrs.pop().unwrap())?;
[INFO] [stderr]     |                                                                 ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'core::str::<impl str>::trim_right_matches': superseded by `trim_end_matches`
[INFO] [stderr]    --> src/output.rs:922:92
[INFO] [stderr]     |
[INFO] [stderr] 922 |                 writeln!(w, "{}  {} = fold recursiveUpdate {{}} [", indent, current_prefix.trim_right_matches('.'))?;
[INFO] [stderr]     |                                                                                            ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::cause': replaced by Error::source, which can support downcasting
[INFO] [stderr]   --> src/error.rs:2:1
[INFO] [stderr]    |
[INFO] [stderr] 2  | / error_chain!{
[INFO] [stderr] 3  | |     foreign_links {
[INFO] [stderr] 4  | |         Io(::std::io::Error);
[INFO] [stderr] 5  | |         Utf8(::std::string::FromUtf8Error);
[INFO] [stderr] ...  |
[INFO] [stderr] 20 | |     }
[INFO] [stderr] 21 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'core::str::<impl str>::trim_right_matches': superseded by `trim_end_matches`
[INFO] [stderr]    --> src/output.rs:881:77
[INFO] [stderr]     |
[INFO] [stderr] 881 |                             writeln!(w, "{}  {}.{}", indent, current_prefix.trim_right_matches('.'), current_attrs.pop().unwrap())?;
[INFO] [stderr]     |                                                                             ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(deprecated)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'core::str::<impl str>::trim_right_matches': superseded by `trim_end_matches`
[INFO] [stderr]    --> src/output.rs:883:104
[INFO] [stderr]     |
[INFO] [stderr] 883 |                             writeln!(w, "{}  {} = fold recursiveUpdate {{}} [", indent, current_prefix.trim_right_matches('.'))?;
[INFO] [stderr]     |                                                                                                        ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'core::str::<impl str>::trim_left_matches': superseded by `trim_start_matches`
[INFO] [stderr]    --> src/output.rs:901:62
[INFO] [stderr]     |
[INFO] [stderr] 901 |                     current_attrs.push(format!("{} = {};", a.trim_left_matches(current_prefix), b[0]))
[INFO] [stderr]     |                                                              ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'core::str::<impl str>::trim_left_matches': superseded by `trim_start_matches`
[INFO] [stderr]    --> src/output.rs:903:81
[INFO] [stderr]     |
[INFO] [stderr] 903 |                     current_attrs.push(format!("{} = (f.{} or false) || {};", a.trim_left_matches(current_prefix), a, b[0]))
[INFO] [stderr]     |                                                                                 ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'core::str::<impl str>::trim_left_matches': superseded by `trim_start_matches`
[INFO] [stderr]    --> src/output.rs:906:75
[INFO] [stderr]     |
[INFO] [stderr] 906 |                     current_attrs.push(format!("{} = (f.{} or false);", a.trim_left_matches(current_prefix), a))
[INFO] [stderr]     |                                                                           ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'core::str::<impl str>::trim_left_matches': superseded by `trim_start_matches`
[INFO] [stderr]    --> src/output.rs:909:72
[INFO] [stderr]     |
[INFO] [stderr] 909 |                 let mut x = format!("{} =\n{}      (f.{} or false)", a.trim_left_matches(current_prefix), indent, a);
[INFO] [stderr]     |                                                                        ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'core::str::<impl str>::trim_right_matches': superseded by `trim_end_matches`
[INFO] [stderr]    --> src/output.rs:920:65
[INFO] [stderr]     |
[INFO] [stderr] 920 |                 writeln!(w, "{}  {}.{}", indent, current_prefix.trim_right_matches('.'), current_attrs.pop().unwrap())?;
[INFO] [stderr]     |                                                                 ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'core::str::<impl str>::trim_right_matches': superseded by `trim_end_matches`
[INFO] [stderr]    --> src/output.rs:922:92
[INFO] [stderr]     |
[INFO] [stderr] 922 |                 writeln!(w, "{}  {} = fold recursiveUpdate {{}} [", indent, current_prefix.trim_right_matches('.'))?;
[INFO] [stderr]     |                                                                                            ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]     --> src/output.rs:1116:21
[INFO] [stderr]      |
[INFO] [stderr] 1116 |                     write!(w, "then [{{ ");
[INFO] [stderr]      |                     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]      = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]      = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'core::str::<impl str>::trim_right_matches': superseded by `trim_end_matches`
[INFO] [stderr]    --> src/output.rs:881:77
[INFO] [stderr]     |
[INFO] [stderr] 881 |                             writeln!(w, "{}  {}.{}", indent, current_prefix.trim_right_matches('.'), current_attrs.pop().unwrap())?;
[INFO] [stderr]     |                                                                             ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(deprecated)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'core::str::<impl str>::trim_right_matches': superseded by `trim_end_matches`
[INFO] [stderr]    --> src/output.rs:883:104
[INFO] [stderr]     |
[INFO] [stderr] 883 |                             writeln!(w, "{}  {} = fold recursiveUpdate {{}} [", indent, current_prefix.trim_right_matches('.'))?;
[INFO] [stderr]     |                                                                                                        ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'core::str::<impl str>::trim_left_matches': superseded by `trim_start_matches`
[INFO] [stderr]    --> src/output.rs:901:62
[INFO] [stderr]     |
[INFO] [stderr] 901 |                     current_attrs.push(format!("{} = {};", a.trim_left_matches(current_prefix), b[0]))
[INFO] [stderr]     |                                                              ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'core::str::<impl str>::trim_left_matches': superseded by `trim_start_matches`
[INFO] [stderr]    --> src/output.rs:903:81
[INFO] [stderr]     |
[INFO] [stderr] 903 |                     current_attrs.push(format!("{} = (f.{} or false) || {};", a.trim_left_matches(current_prefix), a, b[0]))
[INFO] [stderr]     |                                                                                 ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'core::str::<impl str>::trim_left_matches': superseded by `trim_start_matches`
[INFO] [stderr]    --> src/output.rs:906:75
[INFO] [stderr]     |
[INFO] [stderr] 906 |                     current_attrs.push(format!("{} = (f.{} or false);", a.trim_left_matches(current_prefix), a))
[INFO] [stderr]     |                                                                           ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'core::str::<impl str>::trim_left_matches': superseded by `trim_start_matches`
[INFO] [stderr]    --> src/output.rs:909:72
[INFO] [stderr]     |
[INFO] [stderr] 909 |                 let mut x = format!("{} =\n{}      (f.{} or false)", a.trim_left_matches(current_prefix), indent, a);
[INFO] [stderr]     |                                                                        ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'core::str::<impl str>::trim_right_matches': superseded by `trim_end_matches`
[INFO] [stderr]    --> src/output.rs:920:65
[INFO] [stderr]     |
[INFO] [stderr] 920 |                 writeln!(w, "{}  {}.{}", indent, current_prefix.trim_right_matches('.'), current_attrs.pop().unwrap())?;
[INFO] [stderr]     |                                                                 ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'core::str::<impl str>::trim_right_matches': superseded by `trim_end_matches`
[INFO] [stderr]    --> src/output.rs:922:92
[INFO] [stderr]     |
[INFO] [stderr] 922 |                 writeln!(w, "{}  {} = fold recursiveUpdate {{}} [", indent, current_prefix.trim_right_matches('.'))?;
[INFO] [stderr]     |                                                                                            ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::cause': replaced by Error::source, which can support downcasting
[INFO] [stderr]   --> src/error.rs:2:1
[INFO] [stderr]    |
[INFO] [stderr] 2  | / error_chain!{
[INFO] [stderr] 3  | |     foreign_links {
[INFO] [stderr] 4  | |         Io(::std::io::Error);
[INFO] [stderr] 5  | |         Utf8(::std::string::FromUtf8Error);
[INFO] [stderr] ...  |
[INFO] [stderr] 20 | |     }
[INFO] [stderr] 21 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::cause': replaced by Error::source, which can support downcasting
[INFO] [stderr]   --> src/error.rs:2:1
[INFO] [stderr]    |
[INFO] [stderr] 2  | / error_chain!{
[INFO] [stderr] 3  | |     foreign_links {
[INFO] [stderr] 4  | |         Io(::std::io::Error);
[INFO] [stderr] 5  | |         Utf8(::std::string::FromUtf8Error);
[INFO] [stderr] ...  |
[INFO] [stderr] 20 | |     }
[INFO] [stderr] 21 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]    --> src/cfg.rs:122:30
[INFO] [stderr]     |
[INFO] [stderr] 122 |     if let IResult::Done(ref i, ref o) = x {
[INFO] [stderr]     |                              ^ help: consider prefixing with an underscore: `_i`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]    --> src/cfg.rs:122:30
[INFO] [stderr]     |
[INFO] [stderr] 122 |     if let IResult::Done(ref i, ref o) = x {
[INFO] [stderr]     |                              ^ help: consider prefixing with an underscore: `_i`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]     --> src/output.rs:1116:21
[INFO] [stderr]      |
[INFO] [stderr] 1116 |                     write!(w, "then [{{ ");
[INFO] [stderr]      |                     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]      = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]      = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]     --> src/output.rs:1116:21
[INFO] [stderr]      |
[INFO] [stderr] 1116 |                     write!(w, "then [{{ ");
[INFO] [stderr]      |                     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]      = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]      = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]     --> src/output.rs:1116:21
[INFO] [stderr]      |
[INFO] [stderr] 1116 |                     write!(w, "then [{{ ");
[INFO] [stderr]      |                     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]      = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]      = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 7.69s
[INFO] running `"docker" "inspect" "a663f22bab7425a227c75a7ec6fccff7eefe099f342c5a0d6e5e89ac80a88ed0"`
[INFO] running `"docker" "rm" "-f" "a663f22bab7425a227c75a7ec6fccff7eefe099f342c5a0d6e5e89ac80a88ed0"`
[INFO] [stdout] a663f22bab7425a227c75a7ec6fccff7eefe099f342c5a0d6e5e89ac80a88ed0