[INFO] updating cached repository https://github.com/yu-i9/mini_python
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune", kill_on_drop: false }`
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d62b9040f8427057a20d18340a27bdf2dfc8c22e
[INFO] testing yu-i9/mini_python against beta-2020-07-24 for beta-1.46-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyu-i9%2Fmini_python" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/yu-i9/mini_python on toolchain beta-2020-07-24
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/yu-i9/mini_python
[INFO] finished tweaking git repo https://github.com/yu-i9/mini_python
[INFO] tweaked toml for git repo https://github.com/yu-i9/mini_python written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/yu-i9/mini_python already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1040f9d0c9a17e79413ba4e7f8fc84b8d08dc7f018fa3f3ec876c3306175396d
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "1040f9d0c9a17e79413ba4e7f8fc84b8d08dc7f018fa3f3ec876c3306175396d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1040f9d0c9a17e79413ba4e7f8fc84b8d08dc7f018fa3f3ec876c3306175396d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1040f9d0c9a17e79413ba4e7f8fc84b8d08dc7f018fa3f3ec876c3306175396d", kill_on_drop: false }`
[INFO] [stdout] 1040f9d0c9a17e79413ba4e7f8fc84b8d08dc7f018fa3f3ec876c3306175396d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a8509d71c4b9461a03fd6848e11e6a459fcf3be66482400d9721f0268cc53ba7
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "a8509d71c4b9461a03fd6848e11e6a459fcf3be66482400d9721f0268cc53ba7", kill_on_drop: false }`
[INFO] [stderr]    Compiling mini_python v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/core/mod.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(arbitrary_self_types)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/core/mod.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(iterator_find_map)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> src/core/lexer.rs:179:21
[INFO] [stdout]     |
[INFO] [stdout] 179 |                     try!(lexer.calc_indent(indent_level));
[INFO] [stdout]     |                     ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> src/core/lexer.rs:201:17
[INFO] [stdout]     |
[INFO] [stdout] 201 |                 try!(lexer.consume('\'').ok_or(lexer.error("\' expected".to_string())));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]   --> src/core/lexer.rs:63:13
[INFO] [stdout]    |
[INFO] [stdout] 63 |         '0' ... '9' => true,
[INFO] [stdout]    |             ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(ellipsis_inclusive_range_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]   --> src/core/lexer.rs:70:19
[INFO] [stdout]    |
[INFO] [stdout] 70 |         '_' | 'a' ... 'z' | 'A' ... 'Z' => true,
[INFO] [stdout]    |                   ^^^ help: use `..=` for an inclusive range
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]   --> src/core/lexer.rs:70:33
[INFO] [stdout]    |
[INFO] [stdout] 70 |         '_' | 'a' ... 'z' | 'A' ... 'Z' => true,
[INFO] [stdout]    |                                 ^^^ help: use `..=` for an inclusive range
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> src/core/lexer.rs:193:17
[INFO] [stdout]     |
[INFO] [stdout] 193 |             '0' ... '9' => {
[INFO] [stdout]     |                 ^^^ help: use `..=` for an inclusive range
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `opcode::*`
[INFO] [stdout]  --> src/core/utils.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use opcode::*;
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors; 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `mini_python`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "a8509d71c4b9461a03fd6848e11e6a459fcf3be66482400d9721f0268cc53ba7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a8509d71c4b9461a03fd6848e11e6a459fcf3be66482400d9721f0268cc53ba7", kill_on_drop: false }`
[INFO] [stdout] a8509d71c4b9461a03fd6848e11e6a459fcf3be66482400d9721f0268cc53ba7