[INFO] crate zorio 0.1.0 is already in cache
[INFO] testing zorio-0.1.0 against 1.44.0 for beta-1.45-1
[INFO] extracting crate zorio 0.1.0 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate zorio 0.1.0 on toolchain 1.44.0
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate zorio 0.1.0
[INFO] finished tweaking crates.io crate zorio 0.1.0
[INFO] tweaked toml for crates.io crate zorio 0.1.0 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1.44.0" "build" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 0313d8883184fd3320039a6ab018403c801e5bf24d006060a65520fdf4efc187
[INFO] running `"docker" "start" "-a" "0313d8883184fd3320039a6ab018403c801e5bf24d006060a65520fdf4efc187"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling zorio v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `Vec`
[INFO] [stderr]     --> src/io.rs:1977:23
[INFO] [stderr]      |
[INFO] [stderr] 1977 |         let mut buf = Vec::new();
[INFO] [stderr]      |                       ^^^ use of undeclared type or module `Vec`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `String`
[INFO] [stderr]     --> src/io.rs:2008:23
[INFO] [stderr]      |
[INFO] [stderr] 2008 |         let mut buf = String::new();
[INFO] [stderr]      |                       ^^^^^^ use of undeclared type or module `String`
[INFO] [stderr] 
[INFO] [stderr] error[E0412]: cannot find type `Vec` in this scope
[INFO] [stderr]    --> src/io.rs:299:33
[INFO] [stderr]     |
[INFO] [stderr] 299 | struct Guard<'a> { buf: &'a mut Vec<u8>, len: usize }
[INFO] [stderr]     |                                 ^^^ not found in this scope
[INFO] [stderr]     |
[INFO] [stderr] help: possible candidates are found in other modules, you can import them into scope
[INFO] [stderr]     |
[INFO] [stderr] 262 | use alloc::prelude::v1::Vec;
[INFO] [stderr]     |
[INFO] [stderr] 262 | use alloc::vec::Vec;
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] error[E0412]: cannot find type `Vec` in this scope
[INFO] [stderr]    --> src/io.rs:326:26
[INFO] [stderr]     |
[INFO] [stderr] 326 |     where F: FnOnce(&mut Vec<u8>) -> Result<usize>
[INFO] [stderr]     |                          ^^^ not found in this scope
[INFO] [stderr]     |
[INFO] [stderr] help: possible candidates are found in other modules, you can import them into scope
[INFO] [stderr]     |
[INFO] [stderr] 262 | use alloc::prelude::v1::Vec;
[INFO] [stderr]     |
[INFO] [stderr] 262 | use alloc::vec::Vec;
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] error[E0412]: cannot find type `String` in this scope
[INFO] [stderr]    --> src/io.rs:325:34
[INFO] [stderr]     |
[INFO] [stderr] 325 | fn append_to_string<F>(buf: &mut String, f: F) -> Result<usize>
[INFO] [stderr]     |                                  ^^^^^^ not found in this scope
[INFO] [stderr]     |
[INFO] [stderr] help: possible candidates are found in other modules, you can import them into scope
[INFO] [stderr]     |
[INFO] [stderr] 262 | use alloc::prelude::v1::String;
[INFO] [stderr]     |
[INFO] [stderr] 262 | use alloc::string::String;
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] error[E0412]: cannot find type `Vec` in this scope
[INFO] [stderr]    --> src/io.rs:352:55
[INFO] [stderr]     |
[INFO] [stderr] 352 | fn read_to_end<R: Read + ?Sized>(r: &mut R, buf: &mut Vec<u8>) -> Result<usize> {
[INFO] [stderr]     |                                                       ^^^ not found in this scope
[INFO] [stderr]     |
[INFO] [stderr] help: possible candidates are found in other modules, you can import them into scope
[INFO] [stderr]     |
[INFO] [stderr] 262 | use alloc::prelude::v1::Vec;
[INFO] [stderr]     |
[INFO] [stderr] 262 | use alloc::vec::Vec;
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] error[E0412]: cannot find type `Vec` in this scope
[INFO] [stderr]    --> src/io.rs:357:61
[INFO] [stderr]     |
[INFO] [stderr] 357 | ...                   buf: &mut Vec<u8>,
[INFO] [stderr]     |                                 ^^^ not found in this scope
[INFO] [stderr]     |
[INFO] [stderr] help: possible candidates are found in other modules, you can import them into scope
[INFO] [stderr]     |
[INFO] [stderr] 262 | use alloc::prelude::v1::Vec;
[INFO] [stderr]     |
[INFO] [stderr] 262 | use alloc::vec::Vec;
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] error[E0412]: cannot find type `Vec` in this scope
[INFO] [stderr]    --> src/io.rs:598:41
[INFO] [stderr]     |
[INFO] [stderr] 598 |     fn read_to_end(&mut self, buf: &mut Vec<u8>) -> Result<usize> {
[INFO] [stderr]     |                                         ^^^ not found in this scope
[INFO] [stderr]     |
[INFO] [stderr] help: possible candidates are found in other modules, you can import them into scope
[INFO] [stderr]     |
[INFO] [stderr] 262 | use alloc::prelude::v1::Vec;
[INFO] [stderr]     |
[INFO] [stderr] 262 | use alloc::vec::Vec;
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] error[E0412]: cannot find type `String` in this scope
[INFO] [stderr]    --> src/io.rs:641:44
[INFO] [stderr]     |
[INFO] [stderr] 641 |     fn read_to_string(&mut self, buf: &mut String) -> Result<usize> {
[INFO] [stderr]     |                                            ^^^^^^ not found in this scope
[INFO] [stderr]     |
[INFO] [stderr] help: possible candidates are found in other modules, you can import them into scope
[INFO] [stderr]     |
[INFO] [stderr] 262 | use alloc::prelude::v1::String;
[INFO] [stderr]     |
[INFO] [stderr] 262 | use alloc::string::String;
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] error[E0412]: cannot find type `Vec` in this scope
[INFO] [stderr]     --> src/io.rs:1242:68
[INFO] [stderr]      |
[INFO] [stderr] 1242 | fn read_until<R: BufRead + ?Sized>(r: &mut R, delim: u8, buf: &mut Vec<u8>)
[INFO] [stderr]      |                                                                    ^^^ not found in this scope
[INFO] [stderr]      |
[INFO] [stderr] help: possible candidates are found in other modules, you can import them into scope
[INFO] [stderr]      |
[INFO] [stderr] 262  | use alloc::prelude::v1::Vec;
[INFO] [stderr]      |
[INFO] [stderr] 262  | use alloc::vec::Vec;
[INFO] [stderr]      |
[INFO] [stderr] 
[INFO] [stderr] error[E0412]: cannot find type `Vec` in this scope
[INFO] [stderr]     --> src/io.rs:1446:50
[INFO] [stderr]      |
[INFO] [stderr] 1446 |     fn read_until(&mut self, byte: u8, buf: &mut Vec<u8>) -> Result<usize> {
[INFO] [stderr]      |                                                  ^^^ not found in this scope
[INFO] [stderr]      |
[INFO] [stderr] help: possible candidates are found in other modules, you can import them into scope
[INFO] [stderr]      |
[INFO] [stderr] 262  | use alloc::prelude::v1::Vec;
[INFO] [stderr]      |
[INFO] [stderr] 262  | use alloc::vec::Vec;
[INFO] [stderr]      |
[INFO] [stderr] 
[INFO] [stderr] error[E0412]: cannot find type `String` in this scope
[INFO] [stderr]     --> src/io.rs:1505:39
[INFO] [stderr]      |
[INFO] [stderr] 1505 |     fn read_line(&mut self, buf: &mut String) -> Result<usize> {
[INFO] [stderr]      |                                       ^^^^^^ not found in this scope
[INFO] [stderr]      |
[INFO] [stderr] help: possible candidates are found in other modules, you can import them into scope
[INFO] [stderr]      |
[INFO] [stderr] 262  | use alloc::prelude::v1::String;
[INFO] [stderr]      |
[INFO] [stderr] 262  | use alloc::string::String;
[INFO] [stderr]      |
[INFO] [stderr] 
[INFO] [stderr] error[E0412]: cannot find type `Vec` in this scope
[INFO] [stderr]     --> src/io.rs:1901:41
[INFO] [stderr]      |
[INFO] [stderr] 1901 |     fn read_to_end(&mut self, buf: &mut Vec<u8>) -> Result<usize> {
[INFO] [stderr]      |                                         ^^^ not found in this scope
[INFO] [stderr]      |
[INFO] [stderr] help: possible candidates are found in other modules, you can import them into scope
[INFO] [stderr]      |
[INFO] [stderr] 262  | use alloc::prelude::v1::Vec;
[INFO] [stderr]      |
[INFO] [stderr] 262  | use alloc::vec::Vec;
[INFO] [stderr]      |
[INFO] [stderr] 
[INFO] [stderr] error[E0412]: cannot find type `Vec` in this scope
[INFO] [stderr]     --> src/io.rs:1974:24
[INFO] [stderr]      |
[INFO] [stderr] 1974 |     type Item = Result<Vec<u8>>;
[INFO] [stderr]      |                        ^^^ not found in this scope
[INFO] [stderr]      |
[INFO] [stderr] help: possible candidates are found in other modules, you can import them into scope
[INFO] [stderr]      |
[INFO] [stderr] 262  | use alloc::prelude::v1::Vec;
[INFO] [stderr]      |
[INFO] [stderr] 262  | use alloc::vec::Vec;
[INFO] [stderr]      |
[INFO] [stderr] 
[INFO] [stderr] error[E0412]: cannot find type `Vec` in this scope
[INFO] [stderr]     --> src/io.rs:1976:41
[INFO] [stderr]      |
[INFO] [stderr] 1976 |     fn next(&mut self) -> Option<Result<Vec<u8>>> {
[INFO] [stderr]      |                                         ^^^ not found in this scope
[INFO] [stderr]      |
[INFO] [stderr] help: possible candidates are found in other modules, you can import them into scope
[INFO] [stderr]      |
[INFO] [stderr] 262  | use alloc::prelude::v1::Vec;
[INFO] [stderr]      |
[INFO] [stderr] 262  | use alloc::vec::Vec;
[INFO] [stderr]      |
[INFO] [stderr] 
[INFO] [stderr] error[E0412]: cannot find type `String` in this scope
[INFO] [stderr]     --> src/io.rs:2005:24
[INFO] [stderr]      |
[INFO] [stderr] 2005 |     type Item = Result<String>;
[INFO] [stderr]      |                        ^^^^^^ not found in this scope
[INFO] [stderr]      |
[INFO] [stderr] help: possible candidates are found in other modules, you can import them into scope
[INFO] [stderr]      |
[INFO] [stderr] 262  | use alloc::prelude::v1::String;
[INFO] [stderr]      |
[INFO] [stderr] 262  | use alloc::string::String;
[INFO] [stderr]      |
[INFO] [stderr] 
[INFO] [stderr] error[E0412]: cannot find type `String` in this scope
[INFO] [stderr]     --> src/io.rs:2007:41
[INFO] [stderr]      |
[INFO] [stderr] 2007 |     fn next(&mut self) -> Option<Result<String>> {
[INFO] [stderr]      |                                         ^^^^^^ not found in this scope
[INFO] [stderr]      |
[INFO] [stderr] help: possible candidates are found in other modules, you can import them into scope
[INFO] [stderr]      |
[INFO] [stderr] 262  | use alloc::prelude::v1::String;
[INFO] [stderr]      |
[INFO] [stderr] 262  | use alloc::string::String;
[INFO] [stderr]      |
[INFO] [stderr] 
[INFO] [stderr] error[E0412]: cannot find type `Vec` in this scope
[INFO] [stderr]    --> src/cursor.rs:255:43
[INFO] [stderr]     |
[INFO] [stderr] 255 | fn vec_write(pos_mut: &mut u64, vec: &mut Vec<u8>, buf: &[u8]) -> io::Result<usize> {
[INFO] [stderr]     |                                           ^^^ not found in this scope
[INFO] [stderr]     |
[INFO] [stderr] help: possible candidates are found in other modules, you can import them into scope
[INFO] [stderr]     |
[INFO] [stderr] 1   | use alloc::prelude::v1::Vec;
[INFO] [stderr]     |
[INFO] [stderr] 1   | use alloc::vec::Vec;
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] error[E0412]: cannot find type `Vec` in this scope
[INFO] [stderr]    --> src/cursor.rs:291:35
[INFO] [stderr]     |
[INFO] [stderr] 291 | impl<'a> Write for Cursor<&'a mut Vec<u8>> {
[INFO] [stderr]     |                                   ^^^ not found in this scope
[INFO] [stderr]     |
[INFO] [stderr] help: possible candidates are found in other modules, you can import them into scope
[INFO] [stderr]     |
[INFO] [stderr] 1   | use alloc::prelude::v1::Vec;
[INFO] [stderr]     |
[INFO] [stderr] 1   | use alloc::vec::Vec;
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] error[E0412]: cannot find type `Vec` in this scope
[INFO] [stderr]    --> src/cursor.rs:299:23
[INFO] [stderr]     |
[INFO] [stderr] 299 | impl Write for Cursor<Vec<u8>> {
[INFO] [stderr]     |                       ^^^ not found in this scope
[INFO] [stderr]     |
[INFO] [stderr] help: possible candidates are found in other modules, you can import them into scope
[INFO] [stderr]     |
[INFO] [stderr] 1   | use alloc::prelude::v1::Vec;
[INFO] [stderr]     |
[INFO] [stderr] 1   | use alloc::vec::Vec;
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] error[E0412]: cannot find type `Box` in this scope
[INFO] [stderr]    --> src/cursor.rs:307:23
[INFO] [stderr]     |
[INFO] [stderr] 307 | impl Write for Cursor<Box<[u8]>> {
[INFO] [stderr]     |                       ^^^ not found in this scope
[INFO] [stderr]     |
[INFO] [stderr] help: possible candidates are found in other modules, you can import them into scope
[INFO] [stderr]     |
[INFO] [stderr] 1   | use alloc::boxed::Box;
[INFO] [stderr]     |
[INFO] [stderr] 1   | use alloc::prelude::v1::Box;
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] error[E0412]: cannot find type `Vec` in this scope
[INFO] [stderr]   --> src/impls.rs:24:41
[INFO] [stderr]    |
[INFO] [stderr] 24 |     fn read_to_end(&mut self, buf: &mut Vec<u8>) -> io::Result<usize> {
[INFO] [stderr]    |                                         ^^^ not found in this scope
[INFO] [stderr]    |
[INFO] [stderr] help: possible candidates are found in other modules, you can import them into scope
[INFO] [stderr]    |
[INFO] [stderr] 1  | use alloc::prelude::v1::Vec;
[INFO] [stderr]    |
[INFO] [stderr] 1  | use alloc::vec::Vec;
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] error[E0412]: cannot find type `String` in this scope
[INFO] [stderr]   --> src/impls.rs:29:44
[INFO] [stderr]    |
[INFO] [stderr] 29 |     fn read_to_string(&mut self, buf: &mut String) -> io::Result<usize> {
[INFO] [stderr]    |                                            ^^^^^^ not found in this scope
[INFO] [stderr]    |
[INFO] [stderr] help: possible candidates are found in other modules, you can import them into scope
[INFO] [stderr]    |
[INFO] [stderr] 1  | use alloc::prelude::v1::String;
[INFO] [stderr]    |
[INFO] [stderr] 1  | use alloc::string::String;
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] error[E0412]: cannot find type `Vec` in this scope
[INFO] [stderr]   --> src/impls.rs:70:50
[INFO] [stderr]    |
[INFO] [stderr] 70 |     fn read_until(&mut self, byte: u8, buf: &mut Vec<u8>) -> io::Result<usize> {
[INFO] [stderr]    |                                                  ^^^ not found in this scope
[INFO] [stderr]    |
[INFO] [stderr] help: possible candidates are found in other modules, you can import them into scope
[INFO] [stderr]    |
[INFO] [stderr] 1  | use alloc::prelude::v1::Vec;
[INFO] [stderr]    |
[INFO] [stderr] 1  | use alloc::vec::Vec;
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] error[E0412]: cannot find type `String` in this scope
[INFO] [stderr]   --> src/impls.rs:75:39
[INFO] [stderr]    |
[INFO] [stderr] 75 |     fn read_line(&mut self, buf: &mut String) -> io::Result<usize> {
[INFO] [stderr]    |                                       ^^^^^^ not found in this scope
[INFO] [stderr]    |
[INFO] [stderr] help: possible candidates are found in other modules, you can import them into scope
[INFO] [stderr]    |
[INFO] [stderr] 1  | use alloc::prelude::v1::String;
[INFO] [stderr]    |
[INFO] [stderr] 1  | use alloc::string::String;
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] error[E0412]: cannot find type `Box` in this scope
[INFO] [stderr]   --> src/impls.rs:81:33
[INFO] [stderr]    |
[INFO] [stderr] 81 | impl<R: Read + ?Sized> Read for Box<R> {
[INFO] [stderr]    |                                 ^^^ not found in this scope
[INFO] [stderr]    |
[INFO] [stderr] help: possible candidates are found in other modules, you can import them into scope
[INFO] [stderr]    |
[INFO] [stderr] 1  | use alloc::boxed::Box;
[INFO] [stderr]    |
[INFO] [stderr] 1  | use alloc::prelude::v1::Box;
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] error[E0412]: cannot find type `Vec` in this scope
[INFO] [stderr]   --> src/impls.rs:93:41
[INFO] [stderr]    |
[INFO] [stderr] 93 |     fn read_to_end(&mut self, buf: &mut Vec<u8>) -> io::Result<usize> {
[INFO] [stderr]    |                                         ^^^ not found in this scope
[INFO] [stderr]    |
[INFO] [stderr] help: possible candidates are found in other modules, you can import them into scope
[INFO] [stderr]    |
[INFO] [stderr] 1  | use alloc::prelude::v1::Vec;
[INFO] [stderr]    |
[INFO] [stderr] 1  | use alloc::vec::Vec;
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] error[E0412]: cannot find type `String` in this scope
[INFO] [stderr]   --> src/impls.rs:98:44
[INFO] [stderr]    |
[INFO] [stderr] 98 |     fn read_to_string(&mut self, buf: &mut String) -> io::Result<usize> {
[INFO] [stderr]    |                                            ^^^^^^ not found in this scope
[INFO] [stderr]    |
[INFO] [stderr] help: possible candidates are found in other modules, you can import them into scope
[INFO] [stderr]    |
[INFO] [stderr] 1  | use alloc::prelude::v1::String;
[INFO] [stderr]    |
[INFO] [stderr] 1  | use alloc::string::String;
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] error[E0412]: cannot find type `Box` in this scope
[INFO] [stderr]    --> src/impls.rs:108:35
[INFO] [stderr]     |
[INFO] [stderr] 108 | impl<W: Write + ?Sized> Write for Box<W> {
[INFO] [stderr]     |                                   ^^^ not found in this scope
[INFO] [stderr]     |
[INFO] [stderr] help: possible candidates are found in other modules, you can import them into scope
[INFO] [stderr]     |
[INFO] [stderr] 1   | use alloc::boxed::Box;
[INFO] [stderr]     |
[INFO] [stderr] 1   | use alloc::prelude::v1::Box;
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] error[E0412]: cannot find type `Box` in this scope
[INFO] [stderr]    --> src/impls.rs:126:33
[INFO] [stderr]     |
[INFO] [stderr] 126 | impl<S: Seek + ?Sized> Seek for Box<S> {
[INFO] [stderr]     |                                 ^^^ not found in this scope
[INFO] [stderr]     |
[INFO] [stderr] help: possible candidates are found in other modules, you can import them into scope
[INFO] [stderr]     |
[INFO] [stderr] 1   | use alloc::boxed::Box;
[INFO] [stderr]     |
[INFO] [stderr] 1   | use alloc::prelude::v1::Box;
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] error[E0412]: cannot find type `Box` in this scope
[INFO] [stderr]    --> src/impls.rs:131:39
[INFO] [stderr]     |
[INFO] [stderr] 131 | impl<B: BufRead + ?Sized> BufRead for Box<B> {
[INFO] [stderr]     |                                       ^^^ not found in this scope
[INFO] [stderr]     |
[INFO] [stderr] help: possible candidates are found in other modules, you can import them into scope
[INFO] [stderr]     |
[INFO] [stderr] 1   | use alloc::boxed::Box;
[INFO] [stderr]     |
[INFO] [stderr] 1   | use alloc::prelude::v1::Box;
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] error[E0412]: cannot find type `Vec` in this scope
[INFO] [stderr]    --> src/impls.rs:139:50
[INFO] [stderr]     |
[INFO] [stderr] 139 |     fn read_until(&mut self, byte: u8, buf: &mut Vec<u8>) -> io::Result<usize> {
[INFO] [stderr]     |                                                  ^^^ not found in this scope
[INFO] [stderr]     |
[INFO] [stderr] help: possible candidates are found in other modules, you can import them into scope
[INFO] [stderr]     |
[INFO] [stderr] 1   | use alloc::prelude::v1::Vec;
[INFO] [stderr]     |
[INFO] [stderr] 1   | use alloc::vec::Vec;
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] error[E0412]: cannot find type `String` in this scope
[INFO] [stderr]    --> src/impls.rs:144:39
[INFO] [stderr]     |
[INFO] [stderr] 144 |     fn read_line(&mut self, buf: &mut String) -> io::Result<usize> {
[INFO] [stderr]     |                                       ^^^^^^ not found in this scope
[INFO] [stderr]     |
[INFO] [stderr] help: possible candidates are found in other modules, you can import them into scope
[INFO] [stderr]     |
[INFO] [stderr] 1   | use alloc::prelude::v1::String;
[INFO] [stderr]     |
[INFO] [stderr] 1   | use alloc::string::String;
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] error[E0412]: cannot find type `Vec` in this scope
[INFO] [stderr]    --> src/impls.rs:203:41
[INFO] [stderr]     |
[INFO] [stderr] 203 |     fn read_to_end(&mut self, buf: &mut Vec<u8>) -> io::Result<usize> {
[INFO] [stderr]     |                                         ^^^ not found in this scope
[INFO] [stderr]     |
[INFO] [stderr] help: possible candidates are found in other modules, you can import them into scope
[INFO] [stderr]     |
[INFO] [stderr] 1   | use alloc::prelude::v1::Vec;
[INFO] [stderr]     |
[INFO] [stderr] 1   | use alloc::vec::Vec;
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] error[E0412]: cannot find type `Vec` in this scope
[INFO] [stderr]    --> src/impls.rs:252:16
[INFO] [stderr]     |
[INFO] [stderr] 252 | impl Write for Vec<u8> {
[INFO] [stderr]     |                ^^^ not found in this scope
[INFO] [stderr]     |
[INFO] [stderr] help: possible candidates are found in other modules, you can import them into scope
[INFO] [stderr]     |
[INFO] [stderr] 1   | use alloc::prelude::v1::Vec;
[INFO] [stderr]     |
[INFO] [stderr] 1   | use alloc::vec::Vec;
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stderr]  --> src/lib.rs:2:1
[INFO] [stderr]   |
[INFO] [stderr] 2 | #![feature(alloc)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stderr]  --> src/lib.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | #![feature(try_from)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `alloc::prelude::*`
[INFO] [stderr]    --> src/io.rs:262:5
[INFO] [stderr]     |
[INFO] [stderr] 262 | use alloc::prelude::*;
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `alloc::prelude::*`
[INFO] [stderr]  --> src/cursor.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use alloc::prelude::*;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `alloc::prelude::*`
[INFO] [stderr]  --> src/impls.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use alloc::prelude::*;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'alloc_prelude'
[INFO] [stderr]    --> src/io.rs:262:5
[INFO] [stderr]     |
[INFO] [stderr] 262 | use alloc::prelude::*;
[INFO] [stderr]     |     ^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: see issue #58935 <https://github.com/rust-lang/rust/issues/58935> for more information
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'alloc_prelude'
[INFO] [stderr]  --> src/cursor.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use alloc::prelude::*;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: see issue #58935 <https://github.com/rust-lang/rust/issues/58935> for more information
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'alloc_prelude'
[INFO] [stderr]  --> src/impls.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use alloc::prelude::*;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: see issue #58935 <https://github.com/rust-lang/rust/issues/58935> for more information
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 40 previous errors; 3 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0412, E0433, E0554, E0658.
[INFO] [stderr] For more information about an error, try `rustc --explain E0412`.
[INFO] [stderr] error: could not compile `zorio`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "0313d8883184fd3320039a6ab018403c801e5bf24d006060a65520fdf4efc187"`
[INFO] running `"docker" "rm" "-f" "0313d8883184fd3320039a6ab018403c801e5bf24d006060a65520fdf4efc187"`
[INFO] [stdout] 0313d8883184fd3320039a6ab018403c801e5bf24d006060a65520fdf4efc187