Jul 11 22:35:54.806 INFO checking scan-0.1.0 against master#ae5b629efd79de78e6ba7ef493c32857bd7f9cf9 for pr-52234
Jul 11 22:35:54.806 INFO running: cargo +ae5b629efd79de78e6ba7ef493c32857bd7f9cf9-alt check --frozen --all --all-targets
Jul 11 22:35:54.806 INFO creating container for: cargo +ae5b629efd79de78e6ba7ef493c32857bd7f9cf9-alt check --frozen --all --all-targets
Jul 11 22:35:54.806 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-4/pr-52234/master#ae5b629efd79de78e6ba7ef493c32857bd7f9cf9:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-52234/worker-4/master#ae5b629efd79de78e6ba7ef493c32857bd7f9cf9:/target:rw,Z" "-v" "/home/ec2-user/crater/./work/local/cargo-home:/cargo-home:ro,Z" "-v" "/home/ec2-user/crater/./work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=500" "-e" "CMD=cargo +ae5b629efd79de78e6ba7ef493c32857bd7f9cf9-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "crater"`
Jul 11 22:35:55.066 INFO blam! af2c40f79e43be0561ab48b143804975ba21a712b219269eb1134a286d3885cf
Jul 11 22:35:55.069 INFO running `"docker" "start" "-a" "af2c40f79e43be0561ab48b143804975ba21a712b219269eb1134a286d3885cf"`
Jul 11 22:35:55.992 INFO kablam!     Checking scan v0.1.0 (file:///source)
Jul 11 22:35:56.618 INFO kablam! warning: unused import: `Display`
Jul 11 22:35:56.618 INFO kablam!  --> src/scan.rs:6:23
Jul 11 22:35:56.618 INFO kablam!   |
Jul 11 22:35:56.618 INFO kablam! 6 | use std::fmt::{Debug, Display};
Jul 11 22:35:56.618 INFO kablam!   |                       ^^^^^^^
Jul 11 22:35:56.618 INFO kablam!   |
Jul 11 22:35:56.618 INFO kablam!   = note: #[warn(unused_imports)] on by default
Jul 11 22:35:56.618 INFO kablam! 
Jul 11 22:35:56.645 INFO kablam! warning: use of deprecated item 'std::io::Chars': Use str::from_utf8 instead:
Jul 11 22:35:56.645 INFO kablam!     https://doc.rust-lang.org/nightly/std/str/struct.Utf8Error.html#examples
Jul 11 22:35:56.645 INFO kablam!  --> src/scan.rs:1:21
Jul 11 22:35:56.645 INFO kablam!   |
Jul 11 22:35:56.645 INFO kablam! 1 | use std::io::{Read, Chars, CharsError, BufReader};
Jul 11 22:35:56.645 INFO kablam!   |                     ^^^^^
Jul 11 22:35:56.645 INFO kablam!   |
Jul 11 22:35:56.645 INFO kablam!   = note: #[warn(deprecated)] on by default
Jul 11 22:35:56.645 INFO kablam! 
Jul 11 22:35:56.645 INFO kablam! warning: use of deprecated item 'std::io::CharsError': Use str::from_utf8 instead:
Jul 11 22:35:56.645 INFO kablam!     https://doc.rust-lang.org/nightly/std/str/struct.Utf8Error.html#examples
Jul 11 22:35:56.645 INFO kablam!  --> src/scan.rs:1:28
Jul 11 22:35:56.645 INFO kablam!   |
Jul 11 22:35:56.645 INFO kablam! 1 | use std::io::{Read, Chars, CharsError, BufReader};
Jul 11 22:35:56.646 INFO kablam!   |                            ^^^^^^^^^^
Jul 11 22:35:56.646 INFO kablam! 
Jul 11 22:35:56.646 INFO kablam! warning: use of deprecated item 'std::io::CharsError': Use str::from_utf8 instead:
Jul 11 22:35:56.646 INFO kablam!     https://doc.rust-lang.org/nightly/std/str/struct.Utf8Error.html#examples
Jul 11 22:35:56.646 INFO kablam!   --> src/scan.rs:51:23
Jul 11 22:35:56.646 INFO kablam!    |
Jul 11 22:35:56.646 INFO kablam! 51 | impl<F: FromStr> From<io::CharsError> for ScanError<F> {
Jul 11 22:35:56.646 INFO kablam!    |                       ^^^^^^^^^^^^^^
Jul 11 22:35:56.646 INFO kablam! 
Jul 11 22:35:56.647 INFO kablam! warning: use of deprecated item 'std::io::Chars': Use str::from_utf8 instead:
Jul 11 22:35:56.647 INFO kablam!     https://doc.rust-lang.org/nightly/std/str/struct.Utf8Error.html#examples
Jul 11 22:35:56.647 INFO kablam!    --> src/scan.rs:184:45
Jul 11 22:35:56.647 INFO kablam!     |
Jul 11 22:35:56.648 INFO kablam! 184 | impl<R: Read, F: Fn(&char) -> bool> Scanner<Chars<R>, F> {
Jul 11 22:35:56.648 INFO kablam!     |                                             ^^^^^^^^
Jul 11 22:35:56.648 INFO kablam! 
Jul 11 22:35:56.648 INFO kablam! warning: use of deprecated item 'std::io::Chars': Use str::from_utf8 instead:
Jul 11 22:35:56.648 INFO kablam!     https://doc.rust-lang.org/nightly/std/str/struct.Utf8Error.html#examples
Jul 11 22:35:56.648 INFO kablam!    --> src/scan.rs:203:23
Jul 11 22:35:56.648 INFO kablam!     |
Jul 11 22:35:56.648 INFO kablam! 203 | impl<R: Read> Scanner<Chars<R>, fn(&char) -> bool> {
Jul 11 22:35:56.648 INFO kablam!     |                       ^^^^^^^^
Jul 11 22:35:56.648 INFO kablam! 
Jul 11 22:35:56.648 INFO kablam! warning: use of deprecated item 'std::io::CharsError': Use str::from_utf8 instead:
Jul 11 22:35:56.648 INFO kablam!     https://doc.rust-lang.org/nightly/std/str/struct.Utf8Error.html#examples
Jul 11 22:35:56.648 INFO kablam!    --> src/scan.rs:222:36
Jul 11 22:35:56.648 INFO kablam!     |
Jul 11 22:35:56.648 INFO kablam! 222 |     I: Iterator<Item = Result<char,CharsError>>,
Jul 11 22:35:56.648 INFO kablam!     |                                    ^^^^^^^^^^
Jul 11 22:35:56.648 INFO kablam! 
Jul 11 22:35:56.648 INFO kablam! warning: use of deprecated item 'std::io::Chars': Use str::from_utf8 instead:
Jul 11 22:35:56.648 INFO kablam!     https://doc.rust-lang.org/nightly/std/str/struct.Utf8Error.html#examples
Jul 11 22:35:56.648 INFO kablam!    --> src/scan.rs:273:24
Jul 11 22:35:56.648 INFO kablam!     |
Jul 11 22:35:56.648 INFO kablam! 273 |     io::Result<Scanner<Chars<BufReader<File>>, fn(&char) -> bool>> {
Jul 11 22:35:56.648 INFO kablam!     |                        ^^^^^^^^^^^^^^^^^^^^^^
Jul 11 22:35:56.648 INFO kablam! 
Jul 11 22:35:56.648 INFO kablam! warning: use of deprecated item 'std::io::Chars': Use str::from_utf8 instead:
Jul 11 22:35:56.648 INFO kablam!     https://doc.rust-lang.org/nightly/std/str/struct.Utf8Error.html#examples
Jul 11 22:35:56.648 INFO kablam!    --> src/scan.rs:289:32
Jul 11 22:35:56.649 INFO kablam!     |
Jul 11 22:35:56.649 INFO kablam! 289 | pub fn from_stdin() -> Scanner<Chars<io::Stdin>, fn(&char) -> bool> {
Jul 11 22:35:56.649 INFO kablam!     |                                ^^^^^^^^^^^^^^^^
Jul 11 22:35:56.649 INFO kablam! 
Jul 11 22:35:56.649 INFO kablam! warning: use of deprecated item 'std::io::CharsError': Use str::from_utf8 instead:
Jul 11 22:35:56.649 INFO kablam!     https://doc.rust-lang.org/nightly/std/str/struct.Utf8Error.html#examples
Jul 11 22:35:56.649 INFO kablam!   --> src/scan.rs:32:8
Jul 11 22:35:56.649 INFO kablam!    |
Jul 11 22:35:56.649 INFO kablam! 32 |     Io(CharsError),
Jul 11 22:35:56.649 INFO kablam!    |        ^^^^^^^^^^
Jul 11 22:35:56.649 INFO kablam! 
Jul 11 22:35:56.649 INFO kablam! warning: use of deprecated item 'std::io::CharsError': Use str::from_utf8 instead:
Jul 11 22:35:56.649 INFO kablam!     https://doc.rust-lang.org/nightly/std/str/struct.Utf8Error.html#examples
Jul 11 22:35:56.649 INFO kablam!    --> src/scan.rs:127:53
Jul 11 22:35:56.649 INFO kablam!     |
Jul 11 22:35:56.649 INFO kablam! 127 |     fn next_str(&mut self) -> Option<Result<String, CharsError>>;
Jul 11 22:35:56.649 INFO kablam!     |                                                     ^^^^^^^^^^
Jul 11 22:35:56.649 INFO kablam! 
Jul 11 22:35:56.649 INFO kablam! warning: use of deprecated item 'std::io::CharsError': Use str::from_utf8 instead:
Jul 11 22:35:56.649 INFO kablam!     https://doc.rust-lang.org/nightly/std/str/struct.Utf8Error.html#examples
Jul 11 22:35:56.649 INFO kablam!   --> src/scan.rs:52:16
Jul 11 22:35:56.649 INFO kablam!    |
Jul 11 22:35:56.649 INFO kablam! 52 |     fn from(e: io::CharsError) -> ScanError<F> { ScanError::Io(e) }
Jul 11 22:35:56.649 INFO kablam!    |                ^^^^^^^^^^^^^^
Jul 11 22:35:56.649 INFO kablam! 
Jul 11 22:35:56.649 INFO kablam! warning: use of deprecated item 'std::io::CharsError::Other': Use str::from_utf8 instead:
Jul 11 22:35:56.649 INFO kablam!     https://doc.rust-lang.org/nightly/std/str/struct.Utf8Error.html#examples
Jul 11 22:35:56.649 INFO kablam!   --> src/scan.rs:56:59
Jul 11 22:35:56.650 INFO kablam!    |
Jul 11 22:35:56.650 INFO kablam! 56 |     fn from(e: io::Error) -> ScanError<F> { ScanError::Io(CharsError::Other(e)) }
Jul 11 22:35:56.650 INFO kablam!    |                                                           ^^^^^^^^^^^^^^^^^
Jul 11 22:35:56.650 INFO kablam! 
Jul 11 22:35:56.650 INFO kablam! warning: use of deprecated item 'std::io::Chars': Use str::from_utf8 instead:
Jul 11 22:35:56.650 INFO kablam!     https://doc.rust-lang.org/nightly/std/str/struct.Utf8Error.html#examples
Jul 11 22:35:56.650 INFO kablam!    --> src/scan.rs:198:47
Jul 11 22:35:56.650 INFO kablam!     |
Jul 11 22:35:56.650 INFO kablam! 198 |     pub fn custom(reader: R, f: F) -> Scanner<Chars<R>, F> {
Jul 11 22:35:56.650 INFO kablam!     |                                               ^^^^^^^^
Jul 11 22:35:56.650 INFO kablam! 
Jul 11 22:35:56.650 INFO kablam! warning: use of deprecated item 'std::io::Chars': Use str::from_utf8 instead:
Jul 11 22:35:56.650 INFO kablam!     https://doc.rust-lang.org/nightly/std/str/struct.Utf8Error.html#examples
Jul 11 22:35:56.650 INFO kablam!    --> src/scan.rs:216:38
Jul 11 22:35:56.650 INFO kablam!     |
Jul 11 22:35:56.650 INFO kablam! 216 |     pub fn new(reader: R) -> Scanner<Chars<R>, fn(&char) -> bool> {
Jul 11 22:35:56.650 INFO kablam!     |                                      ^^^^^^^^
Jul 11 22:35:56.650 INFO kablam! 
Jul 11 22:35:56.650 INFO kablam! warning: use of deprecated item 'std::io::CharsError': Use str::from_utf8 instead:
Jul 11 22:35:56.650 INFO kablam!     https://doc.rust-lang.org/nightly/std/str/struct.Utf8Error.html#examples
Jul 11 22:35:56.650 INFO kablam!    --> src/scan.rs:224:53
Jul 11 22:35:56.650 INFO kablam!     |
Jul 11 22:35:56.650 INFO kablam! 224 |     fn next_str(&mut self) -> Option<Result<String, CharsError>> {
Jul 11 22:35:56.650 INFO kablam!     |                                                     ^^^^^^^^^^
Jul 11 22:35:56.650 INFO kablam! 
Jul 11 22:35:56.741 INFO kablam! warning: unused import: `Display`
Jul 11 22:35:56.742 INFO kablam!  --> src/scan.rs:6:23
Jul 11 22:35:56.742 INFO kablam!   |
Jul 11 22:35:56.742 INFO kablam! 6 | use std::fmt::{Debug, Display};
Jul 11 22:35:56.742 INFO kablam!   |                       ^^^^^^^
Jul 11 22:35:56.742 INFO kablam!   |
Jul 11 22:35:56.742 INFO kablam!   = note: #[warn(unused_imports)] on by default
Jul 11 22:35:56.742 INFO kablam! 
Jul 11 22:35:56.764 INFO kablam! warning: use of deprecated item 'std::io::Chars': Use str::from_utf8 instead:
Jul 11 22:35:56.764 INFO kablam!     https://doc.rust-lang.org/nightly/std/str/struct.Utf8Error.html#examples
Jul 11 22:35:56.764 INFO kablam!  --> src/scan.rs:1:21
Jul 11 22:35:56.764 INFO kablam!   |
Jul 11 22:35:56.764 INFO kablam! 1 | use std::io::{Read, Chars, CharsError, BufReader};
Jul 11 22:35:56.764 INFO kablam!   |                     ^^^^^
Jul 11 22:35:56.764 INFO kablam!   |
Jul 11 22:35:56.765 INFO kablam!   = note: #[warn(deprecated)] on by default
Jul 11 22:35:56.765 INFO kablam! 
Jul 11 22:35:56.765 INFO kablam! warning: use of deprecated item 'std::io::CharsError': Use str::from_utf8 instead:
Jul 11 22:35:56.765 INFO kablam!     https://doc.rust-lang.org/nightly/std/str/struct.Utf8Error.html#examples
Jul 11 22:35:56.765 INFO kablam!  --> src/scan.rs:1:28
Jul 11 22:35:56.765 INFO kablam!   |
Jul 11 22:35:56.765 INFO kablam! 1 | use std::io::{Read, Chars, CharsError, BufReader};
Jul 11 22:35:56.765 INFO kablam!   |                            ^^^^^^^^^^
Jul 11 22:35:56.765 INFO kablam! 
Jul 11 22:35:56.766 INFO kablam! warning: use of deprecated item 'std::io::CharsError': Use str::from_utf8 instead:
Jul 11 22:35:56.766 INFO kablam!     https://doc.rust-lang.org/nightly/std/str/struct.Utf8Error.html#examples
Jul 11 22:35:56.766 INFO kablam!   --> src/scan.rs:51:23
Jul 11 22:35:56.766 INFO kablam!    |
Jul 11 22:35:56.766 INFO kablam! 51 | impl<F: FromStr> From<io::CharsError> for ScanError<F> {
Jul 11 22:35:56.766 INFO kablam!    |                       ^^^^^^^^^^^^^^
Jul 11 22:35:56.766 INFO kablam! 
Jul 11 22:35:56.766 INFO kablam! warning: use of deprecated item 'std::io::Chars': Use str::from_utf8 instead:
Jul 11 22:35:56.766 INFO kablam!     https://doc.rust-lang.org/nightly/std/str/struct.Utf8Error.html#examples
Jul 11 22:35:56.766 INFO kablam!    --> src/scan.rs:184:45
Jul 11 22:35:56.766 INFO kablam!     |
Jul 11 22:35:56.766 INFO kablam! 184 | impl<R: Read, F: Fn(&char) -> bool> Scanner<Chars<R>, F> {
Jul 11 22:35:56.766 INFO kablam!     |                                             ^^^^^^^^
Jul 11 22:35:56.766 INFO kablam! 
Jul 11 22:35:56.767 INFO kablam! warning: use of deprecated item 'std::io::Chars': Use str::from_utf8 instead:
Jul 11 22:35:56.767 INFO kablam!     https://doc.rust-lang.org/nightly/std/str/struct.Utf8Error.html#examples
Jul 11 22:35:56.767 INFO kablam!    --> src/scan.rs:203:23
Jul 11 22:35:56.767 INFO kablam!     |
Jul 11 22:35:56.767 INFO kablam! 203 | impl<R: Read> Scanner<Chars<R>, fn(&char) -> bool> {
Jul 11 22:35:56.767 INFO kablam!     |                       ^^^^^^^^
Jul 11 22:35:56.767 INFO kablam! 
Jul 11 22:35:56.767 INFO kablam! warning: use of deprecated item 'std::io::CharsError': Use str::from_utf8 instead:
Jul 11 22:35:56.767 INFO kablam!     https://doc.rust-lang.org/nightly/std/str/struct.Utf8Error.html#examples
Jul 11 22:35:56.767 INFO kablam!    --> src/scan.rs:222:36
Jul 11 22:35:56.767 INFO kablam!     |
Jul 11 22:35:56.767 INFO kablam! 222 |     I: Iterator<Item = Result<char,CharsError>>,
Jul 11 22:35:56.767 INFO kablam!     |                                    ^^^^^^^^^^
Jul 11 22:35:56.767 INFO kablam! 
Jul 11 22:35:56.768 INFO kablam! warning: use of deprecated item 'std::io::Chars': Use str::from_utf8 instead:
Jul 11 22:35:56.768 INFO kablam!     https://doc.rust-lang.org/nightly/std/str/struct.Utf8Error.html#examples
Jul 11 22:35:56.768 INFO kablam!    --> src/scan.rs:273:24
Jul 11 22:35:56.768 INFO kablam!     |
Jul 11 22:35:56.768 INFO kablam! 273 |     io::Result<Scanner<Chars<BufReader<File>>, fn(&char) -> bool>> {
Jul 11 22:35:56.768 INFO kablam!     |                        ^^^^^^^^^^^^^^^^^^^^^^
Jul 11 22:35:56.768 INFO kablam! 
Jul 11 22:35:56.768 INFO kablam! warning: use of deprecated item 'std::io::Chars': Use str::from_utf8 instead:
Jul 11 22:35:56.768 INFO kablam!     https://doc.rust-lang.org/nightly/std/str/struct.Utf8Error.html#examples
Jul 11 22:35:56.768 INFO kablam!    --> src/scan.rs:289:32
Jul 11 22:35:56.768 INFO kablam!     |
Jul 11 22:35:56.768 INFO kablam! 289 | pub fn from_stdin() -> Scanner<Chars<io::Stdin>, fn(&char) -> bool> {
Jul 11 22:35:56.768 INFO kablam!     |                                ^^^^^^^^^^^^^^^^
Jul 11 22:35:56.768 INFO kablam! 
Jul 11 22:35:56.769 INFO kablam! warning: use of deprecated item 'std::io::CharsError': Use str::from_utf8 instead:
Jul 11 22:35:56.769 INFO kablam!     https://doc.rust-lang.org/nightly/std/str/struct.Utf8Error.html#examples
Jul 11 22:35:56.769 INFO kablam!   --> src/scan.rs:32:8
Jul 11 22:35:56.769 INFO kablam!    |
Jul 11 22:35:56.769 INFO kablam! 32 |     Io(CharsError),
Jul 11 22:35:56.769 INFO kablam!    |        ^^^^^^^^^^
Jul 11 22:35:56.769 INFO kablam! 
Jul 11 22:35:56.769 INFO kablam! warning: use of deprecated item 'std::io::CharsError': Use str::from_utf8 instead:
Jul 11 22:35:56.769 INFO kablam!     https://doc.rust-lang.org/nightly/std/str/struct.Utf8Error.html#examples
Jul 11 22:35:56.769 INFO kablam!    --> src/scan.rs:127:53
Jul 11 22:35:56.769 INFO kablam!     |
Jul 11 22:35:56.769 INFO kablam! 127 |     fn next_str(&mut self) -> Option<Result<String, CharsError>>;
Jul 11 22:35:56.769 INFO kablam!     |                                                     ^^^^^^^^^^
Jul 11 22:35:56.769 INFO kablam! 
Jul 11 22:35:56.770 INFO kablam! warning: use of deprecated item 'std::io::CharsError': Use str::from_utf8 instead:
Jul 11 22:35:56.770 INFO kablam!     https://doc.rust-lang.org/nightly/std/str/struct.Utf8Error.html#examples
Jul 11 22:35:56.770 INFO kablam!   --> src/scan.rs:52:16
Jul 11 22:35:56.770 INFO kablam!    |
Jul 11 22:35:56.770 INFO kablam! 52 |     fn from(e: io::CharsError) -> ScanError<F> { ScanError::Io(e) }
Jul 11 22:35:56.770 INFO kablam!    |                ^^^^^^^^^^^^^^
Jul 11 22:35:56.770 INFO kablam! 
Jul 11 22:35:56.770 INFO kablam! warning: use of deprecated item 'std::io::CharsError::Other': Use str::from_utf8 instead:
Jul 11 22:35:56.770 INFO kablam!     https://doc.rust-lang.org/nightly/std/str/struct.Utf8Error.html#examples
Jul 11 22:35:56.770 INFO kablam!   --> src/scan.rs:56:59
Jul 11 22:35:56.771 INFO kablam!    |
Jul 11 22:35:56.771 INFO kablam! 56 |     fn from(e: io::Error) -> ScanError<F> { ScanError::Io(CharsError::Other(e)) }
Jul 11 22:35:56.771 INFO kablam!    |                                                           ^^^^^^^^^^^^^^^^^
Jul 11 22:35:56.771 INFO kablam! 
Jul 11 22:35:56.771 INFO kablam! warning: use of deprecated item 'std::io::Chars': Use str::from_utf8 instead:
Jul 11 22:35:56.771 INFO kablam!     https://doc.rust-lang.org/nightly/std/str/struct.Utf8Error.html#examples
Jul 11 22:35:56.771 INFO kablam!    --> src/scan.rs:198:47
Jul 11 22:35:56.771 INFO kablam!     |
Jul 11 22:35:56.771 INFO kablam! 198 |     pub fn custom(reader: R, f: F) -> Scanner<Chars<R>, F> {
Jul 11 22:35:56.771 INFO kablam!     |                                               ^^^^^^^^
Jul 11 22:35:56.771 INFO kablam! 
Jul 11 22:35:56.772 INFO kablam! warning: use of deprecated item 'std::io::Chars': Use str::from_utf8 instead:
Jul 11 22:35:56.772 INFO kablam!     https://doc.rust-lang.org/nightly/std/str/struct.Utf8Error.html#examples
Jul 11 22:35:56.772 INFO kablam!    --> src/scan.rs:216:38
Jul 11 22:35:56.772 INFO kablam!     |
Jul 11 22:35:56.772 INFO kablam! 216 |     pub fn new(reader: R) -> Scanner<Chars<R>, fn(&char) -> bool> {
Jul 11 22:35:56.772 INFO kablam!     |                                      ^^^^^^^^
Jul 11 22:35:56.772 INFO kablam! 
Jul 11 22:35:56.772 INFO kablam! warning: use of deprecated item 'std::io::CharsError': Use str::from_utf8 instead:
Jul 11 22:35:56.772 INFO kablam!     https://doc.rust-lang.org/nightly/std/str/struct.Utf8Error.html#examples
Jul 11 22:35:56.772 INFO kablam!    --> src/scan.rs:224:53
Jul 11 22:35:56.772 INFO kablam!     |
Jul 11 22:35:56.772 INFO kablam! 224 |     fn next_str(&mut self) -> Option<Result<String, CharsError>> {
Jul 11 22:35:56.772 INFO kablam!     |                                                     ^^^^^^^^^^
Jul 11 22:35:56.772 INFO kablam! 
Jul 11 22:35:56.836 INFO kablam! warning: use of deprecated item 'std::io::Read::chars': Use str::from_utf8 instead:
Jul 11 22:35:56.837 INFO kablam!         https://doc.rust-lang.org/nightly/std/str/struct.Utf8Error.html#examples
Jul 11 22:35:56.837 INFO kablam!    --> src/scan.rs:199:32
Jul 11 22:35:56.837 INFO kablam!     |
Jul 11 22:35:56.837 INFO kablam! 199 |         Scanner{ chars: reader.chars(), ignore: f }
Jul 11 22:35:56.837 INFO kablam!     |                                ^^^^^
Jul 11 22:35:56.837 INFO kablam! 
Jul 11 22:35:56.902 INFO kablam! warning: use of deprecated item 'std::io::Read::chars': Use str::from_utf8 instead:
Jul 11 22:35:56.902 INFO kablam!         https://doc.rust-lang.org/nightly/std/str/struct.Utf8Error.html#examples
Jul 11 22:35:56.902 INFO kablam!    --> src/scan.rs:199:32
Jul 11 22:35:56.902 INFO kablam!     |
Jul 11 22:35:56.903 INFO kablam! 199 |         Scanner{ chars: reader.chars(), ignore: f }
Jul 11 22:35:56.903 INFO kablam!     |                                ^^^^^
Jul 11 22:35:56.903 INFO kablam! 
Jul 11 22:35:58.654 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 2.71s
Jul 11 22:35:58.657 INFO kablam! su: No module specific data is present
Jul 11 22:35:59.167 INFO running `"docker" "rm" "-f" "af2c40f79e43be0561ab48b143804975ba21a712b219269eb1134a286d3885cf"`
Jul 11 22:35:59.339 INFO blam! af2c40f79e43be0561ab48b143804975ba21a712b219269eb1134a286d3885cf