[INFO] updating cached repository yu-i9/mini_python
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/yu-i9/mini_python
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/yu-i9/mini_python" "work/ex/beta-1.38-1/sources/1.37.0/gh/yu-i9/mini_python"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/yu-i9/mini_python'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/yu-i9/mini_python" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/yu-i9/mini_python"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/yu-i9/mini_python'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] d62b9040f8427057a20d18340a27bdf2dfc8c22e
[INFO] sha for GitHub repo yu-i9/mini_python: d62b9040f8427057a20d18340a27bdf2dfc8c22e
[INFO] validating manifest of yu-i9/mini_python on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of yu-i9/mini_python on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing yu-i9/mini_python
[INFO] finished frobbing yu-i9/mini_python
[INFO] frobbed toml for yu-i9/mini_python written to work/ex/beta-1.38-1/sources/1.37.0/gh/yu-i9/mini_python/Cargo.toml
[INFO] started frobbing yu-i9/mini_python
[INFO] finished frobbing yu-i9/mini_python
[INFO] frobbed toml for yu-i9/mini_python written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/yu-i9/mini_python/Cargo.toml
[INFO] crate yu-i9/mini_python already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing yu-i9/mini_python against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/yu-i9/mini_python:/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" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] f3e6c7b83f9f139775894fd52033911a0d68395c076d3a98867dc7133bd67474
[INFO] running `"docker" "start" "-a" "f3e6c7b83f9f139775894fd52033911a0d68395c076d3a98867dc7133bd67474"`
[INFO] [stderr]    Compiling mini_python v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> src/core/mod.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(arbitrary_self_types)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> src/core/mod.rs:2:1
[INFO] [stderr]   |
[INFO] [stderr] 2 | #![feature(iterator_find_map)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]   --> src/core/lexer.rs:63:13
[INFO] [stderr]    |
[INFO] [stderr] 63 |         '0' ... '9' => true,
[INFO] [stderr]    |             ^^^ help: use `..=` for an inclusive range
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(ellipsis_inclusive_range_patterns)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]   --> src/core/lexer.rs:70:19
[INFO] [stderr]    |
[INFO] [stderr] 70 |         '_' | 'a' ... 'z' | 'A' ... 'Z' => true,
[INFO] [stderr]    |                   ^^^ help: use `..=` for an inclusive range
[INFO] [stderr] 
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]   --> src/core/lexer.rs:70:33
[INFO] [stderr]    |
[INFO] [stderr] 70 |         '_' | 'a' ... 'z' | 'A' ... 'Z' => true,
[INFO] [stderr]    |                                 ^^^ help: use `..=` for an inclusive range
[INFO] [stderr] 
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]    --> src/core/lexer.rs:193:17
[INFO] [stderr]     |
[INFO] [stderr] 193 |             '0' ... '9' => {
[INFO] [stderr]     |                 ^^^ help: use `..=` for an inclusive range
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `opcode::*`
[INFO] [stderr]  --> src/core/utils.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | use opcode::*;
[INFO] [stderr]   |     ^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: Could not compile `mini_python`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "f3e6c7b83f9f139775894fd52033911a0d68395c076d3a98867dc7133bd67474"`
[INFO] running `"docker" "rm" "-f" "f3e6c7b83f9f139775894fd52033911a0d68395c076d3a98867dc7133bd67474"`
[INFO] [stdout] f3e6c7b83f9f139775894fd52033911a0d68395c076d3a98867dc7133bd67474