[INFO] updating cached repository https://github.com/vendethiel/smallstack
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/big/crater/work/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 053b8d48c8de87e036a17ee7283676eeba67ba66
[INFO] testing vendethiel/smallstack against 1.38.0 for beta-1.39-1
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvendethiel%2Fsmallstack" "work/builds/worker-3/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/vendethiel/smallstack on toolchain 1.38.0
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/vendethiel/smallstack
[INFO] finished tweaking git repo https://github.com/vendethiel/smallstack
[INFO] tweaked toml for git repo https://github.com/vendethiel/smallstack written to work/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/vendethiel/smallstack already has a lockfile, it will not be regenerated
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-3/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-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" "+1.38.0" "build" "--frozen"`
[INFO] [stdout] 9dd490f17e6ebba3bae7dd41d7db17dd4b91056415fc1436d286c4b97b59866f
[INFO] running `"docker" "start" "-a" "9dd490f17e6ebba3bae7dd41d7db17dd4b91056415fc1436d286c4b97b59866f"`
[INFO] [stderr] warning: path `/opt/rustwide/workdir/src/smallstack.rs` was erroneously implicitly accepted for binary `smallstack`,
[INFO] [stderr] please set bin.path in Cargo.toml
[INFO] [stderr]    Compiling smallstack v0.0.1 (/opt/rustwide/workdir)
[INFO] [stderr] error: expected one of `,`, `@`, or `]`, found `..`
[INFO] [stderr]   --> src/smallstack.rs:63:31
[INFO] [stderr]    |
[INFO] [stderr] 63 |         &["push", "str", ref n..] => stack.push(Expr::Str(String::from(n.join(" ")))),
[INFO] [stderr]    |                               ^^ expected one of `,`, `@`, or `]` here
[INFO] [stderr] 
[INFO] [stderr] warning: unused doc comment
[INFO] [stderr]    --> src/smallstack.rs:148:9
[INFO] [stderr]     |
[INFO] [stderr] 148 |           /// XXX this should JUST be a call!
[INFO] [stderr]     |           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 149 | /         &["math", op] => if let
[INFO] [stderr] 150 | |             (Some(Expr::Int(arg1)), Some(Expr::Int(arg2)))
[INFO] [stderr] 151 | |             =
[INFO] [stderr] 152 | |             (stack.pop(), stack.pop()) {
[INFO] [stderr] ...   |
[INFO] [stderr] 162 | |           panic!("VM error: not enough arguments to `math`");
[INFO] [stderr] 163 | |         },
[INFO] [stderr]     | |_________- rustdoc does not generate documentation for match arms
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stderr]  --> src/smallstack.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(slice_patterns)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `join` found for type `&&str` in the current scope
[INFO] [stderr]   --> src/smallstack.rs:63:74
[INFO] [stderr]    |
[INFO] [stderr] 63 |         &["push", "str", ref n..] => stack.push(Expr::Str(String::from(n.join(" ")))),
[INFO] [stderr]    |                                                                          ^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 3 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0554, E0599.
[INFO] [stderr] For more information about an error, try `rustc --explain E0554`.
[INFO] [stderr] error: Could not compile `smallstack`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "9dd490f17e6ebba3bae7dd41d7db17dd4b91056415fc1436d286c4b97b59866f"`
[INFO] running `"docker" "rm" "-f" "9dd490f17e6ebba3bae7dd41d7db17dd4b91056415fc1436d286c4b97b59866f"`
[INFO] [stdout] 9dd490f17e6ebba3bae7dd41d7db17dd4b91056415fc1436d286c4b97b59866f