[INFO] updating cached repository gx-sdk/gx
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/gx-sdk/gx
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/gx-sdk/gx" "work/ex/beta-1.37-6/sources/1.36.0/gh/gx-sdk/gx"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/gx-sdk/gx'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/gx-sdk/gx" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/gx-sdk/gx"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/gx-sdk/gx'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 51971bf377ac288d645976caab2442f255b86542
[INFO] sha for GitHub repo gx-sdk/gx: 51971bf377ac288d645976caab2442f255b86542
[INFO] validating manifest of gx-sdk/gx on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of gx-sdk/gx on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing gx-sdk/gx
[INFO] finished frobbing gx-sdk/gx
[INFO] frobbed toml for gx-sdk/gx written to work/ex/beta-1.37-6/sources/1.36.0/gh/gx-sdk/gx/Cargo.toml
[INFO] started frobbing gx-sdk/gx
[INFO] finished frobbing gx-sdk/gx
[INFO] frobbed toml for gx-sdk/gx written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/gx-sdk/gx/Cargo.toml
[INFO] crate gx-sdk/gx already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing gx-sdk/gx against 1.36.0 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-7/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/gx-sdk/gx:/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=warn" "-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" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] b25cea7ca097b6c95a2c99fd03837bb63bd5fd7aa7bcf5c481970d12d5dd134d
[INFO] running `"docker" "start" "-a" "b25cea7ca097b6c95a2c99fd03837bb63bd5fd7aa7bcf5c481970d12d5dd134d"`
[INFO] [stderr] warning: path `/opt/crater/workdir/src/gx.rs` was erroneously implicitly accepted for binary `gx`,
[INFO] [stderr] please set bin.path in Cargo.toml
[INFO] [stderr]    Compiling getopts v0.2.14
[INFO] [stderr] warning[E0503]: cannot use `state` because it was mutably borrowed
[INFO] [stderr]     --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/getopts-0.2.14/src/lib.rs:1008:33
[INFO] [stderr]      |
[INFO] [stderr] 955  |     let mut machine = |cont: &mut bool, (i, c): (usize, char)| {
[INFO] [stderr]      |                       ---------------------------------------- borrow of `state` occurs here
[INFO] [stderr] ...
[INFO] [stderr] 959  |         state = match (state, whitespace, limit) {
[INFO] [stderr]      |         ----- borrow occurs due to use of `state` in closure
[INFO] [stderr] ...
[INFO] [stderr] 1008 |     while cont && match state { B | C => true, A => false } {
[INFO] [stderr]      |                                 ^ use of borrowed `state`
[INFO] [stderr] 1009 |         machine(&mut cont, (fake_i, ' '));
[INFO] [stderr]      |         ------- borrow later used here
[INFO] [stderr]      |
[INFO] [stderr]      = warning: this error has been downgraded to a warning for backwards compatibility with previous releases
[INFO] [stderr]      = warning: this represents potential undefined behavior in your code and this warning will become a hard error in the future
[INFO] [stderr] 
[INFO] [stderr]    Compiling gx v0.0.1 (/opt/crater/workdir)
[INFO] [stderr] error[E0412]: cannot find type `CharsError` in module `io`
[INFO] [stderr]   --> src/frontend/lexer.rs:76:43
[INFO] [stderr]    |
[INFO] [stderr] 76 | impl<It: Iterator<Item = Result<char, io::CharsError>>> Lexer<It> {
[INFO] [stderr]    |                                           ^^^^^^^^^^ not found in `io`
[INFO] [stderr] 
[INFO] [stderr] error[E0412]: cannot find type `CharsError` in module `io`
[INFO] [stderr]    --> src/frontend/lexer.rs:399:43
[INFO] [stderr]     |
[INFO] [stderr] 399 | impl<It: Iterator<Item = Result<char, io::CharsError>>> Iterator for Lexer<It> {
[INFO] [stderr]     |                                           ^^^^^^^^^^ not found in `io`
[INFO] [stderr] 
[INFO] [stderr] error[E0412]: cannot find type `CharsError` in module `io`
[INFO] [stderr]   --> src/frontend/parser.rs:33:51
[INFO] [stderr]    |
[INFO] [stderr] 33 | impl<It: Iterator<Item = result::Result<char, io::CharsError>>> Parser<It> {
[INFO] [stderr]    |                                                   ^^^^^^^^^^ not found in `io`
[INFO] [stderr] 
[INFO] [stderr] error[E0412]: cannot find type `Chars` in module `io`
[INFO] [stderr]   --> src/gx.rs:61:22
[INFO] [stderr]    |
[INFO] [stderr] 61 |     fn parse(ch: io::Chars<io::BufReader<fs::File>>) -> parser::Result<Input> {
[INFO] [stderr]    |                      ^^^^^ not found in `io`
[INFO] [stderr] help: possible candidate is found in another module, you can import it into scope
[INFO] [stderr]    |
[INFO] [stderr] 25 |     use std::str::Chars;
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> src/gx.rs:9:1
[INFO] [stderr]   |
[INFO] [stderr] 9 | #![feature(io)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::io::Read`
[INFO] [stderr]   --> src/gx.rs:94:17
[INFO] [stderr]    |
[INFO] [stderr] 94 |             use std::io::Read;
[INFO] [stderr]    |                 ^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `chars` found for type `std::io::BufReader<std::fs::File>` in the current scope
[INFO] [stderr]   --> src/gx.rs:95:62
[INFO] [stderr]    |
[INFO] [stderr] 95 |             let mut p = match parse(io::BufReader::new(file).chars()) {
[INFO] [stderr]    |                                                              ^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 6 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0412, E0554, E0599.
[INFO] [stderr] For more information about an error, try `rustc --explain E0412`.
[INFO] [stderr] error: Could not compile `gx`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "b25cea7ca097b6c95a2c99fd03837bb63bd5fd7aa7bcf5c481970d12d5dd134d"`
[INFO] running `"docker" "rm" "-f" "b25cea7ca097b6c95a2c99fd03837bb63bd5fd7aa7bcf5c481970d12d5dd134d"`
[INFO] [stdout] b25cea7ca097b6c95a2c99fd03837bb63bd5fd7aa7bcf5c481970d12d5dd134d