[INFO] crate topdown-rs 0.3.3 is already in cache
[INFO] checking topdown-rs-0.3.3 against beta-2019-10-27 for pr-65897
[INFO] extracting crate topdown-rs 0.3.3 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate topdown-rs 0.3.3 on toolchain beta-2019-10-27
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2019-10-27" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate topdown-rs 0.3.3
[INFO] finished tweaking crates.io crate topdown-rs 0.3.3
[INFO] tweaked toml for crates.io crate topdown-rs 0.3.3 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2019-10-27" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2019-10-27" "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 `"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=allow" "-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" "+beta-2019-10-27" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] ac58164c9216f0534921902592a3c29170bf088638bef32372bebf7e0cf6c2a0
[INFO] running `"docker" "start" "-a" "ac58164c9216f0534921902592a3c29170bf088638bef32372bebf7e0cf6c2a0"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking topdown-rs v0.3.3 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0392]: parameter `'a` is never used
[INFO] [stderr]   --> src/chainl.rs:54:15
[INFO] [stderr]    |
[INFO] [stderr] 54 |     struct Op<'a>;
[INFO] [stderr]    |               ^^ unused parameter
[INFO] [stderr]    |
[INFO] [stderr]    = help: consider removing `'a` or using a marker such as `std::marker::PhantomData`
[INFO] [stderr] 
[INFO] [stderr] error[E0392]: parameter `'a` is never used
[INFO] [stderr]   --> src/chainr.rs:47:15
[INFO] [stderr]    |
[INFO] [stderr] 47 |     struct Op<'a>;
[INFO] [stderr]    |               ^^ unused parameter
[INFO] [stderr]    |
[INFO] [stderr]    = help: consider removing `'a` or using a marker such as `std::marker::PhantomData`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0392`.
[INFO] [stderr] error: could not compile `topdown-rs`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: expected parameter name, found `:`
[INFO] [stderr]    --> examples/interpreter/parser.rs:342:32
[INFO] [stderr]     |
[INFO] [stderr] 342 |             "*" => (Box::new(|&: a:AST, b:AST| BinOp(MUL, Box::new(a.clone()), Box::new(b.clone())))) as Box<Fn(AST, AST) -> AST>,
[INFO] [stderr]     |                                ^ expected parameter name
[INFO] [stderr] 
[INFO] [stderr] error: expected parameter name, found `:`
[INFO] [stderr]    --> examples/interpreter/parser.rs:343:32
[INFO] [stderr]     |
[INFO] [stderr] 343 |             "/" => (Box::new(|&: a:AST, b:AST| BinOp(DIV, Box::new(a.clone()), Box::new(b.clone())))) as Box<Fn(AST, AST) -> AST>,
[INFO] [stderr]     |                                ^ expected parameter name
[INFO] [stderr] 
[INFO] [stderr] error: expected parameter name, found `:`
[INFO] [stderr]    --> examples/interpreter/parser.rs:344:32
[INFO] [stderr]     |
[INFO] [stderr] 344 |             "%" => (Box::new(|&: a:AST, b:AST| BinOp(MOD, Box::new(a.clone()), Box::new(b.clone())))) as Box<Fn(AST, AST) -> AST>,
[INFO] [stderr]     |                                ^ expected parameter name
[INFO] [stderr] 
[INFO] [stderr] error: expected parameter name, found `:`
[INFO] [stderr]    --> examples/interpreter/parser.rs:353:32
[INFO] [stderr]     |
[INFO] [stderr] 353 |             "+" => (Box::new(|&: a:AST, b:AST| BinOp(ADD, Box::new(a.clone()), Box::new(b.clone())))) as Box<Fn(AST, AST) -> AST>,
[INFO] [stderr]     |                                ^ expected parameter name
[INFO] [stderr] 
[INFO] [stderr] error: expected parameter name, found `:`
[INFO] [stderr]    --> examples/interpreter/parser.rs:354:32
[INFO] [stderr]     |
[INFO] [stderr] 354 |             "-" => (Box::new(|&: a:AST, b:AST| BinOp(SUB, Box::new(a.clone()), Box::new(b.clone())))) as Box<Fn(AST, AST) -> AST>,
[INFO] [stderr]     |                                ^ expected parameter name
[INFO] [stderr] 
[INFO] [stderr] error: expected parameter name, found `:`
[INFO] [stderr]    --> examples/interpreter/parser.rs:355:33
[INFO] [stderr]     |
[INFO] [stderr] 355 |             "==" => (Box::new(|&: a:AST, b:AST| BinOp(EQ, Box::new(a.clone()), Box::new(b.clone())))) as Box<Fn(AST, AST) -> AST>,
[INFO] [stderr]     |                                 ^ expected parameter name
[INFO] [stderr] 
[INFO] [stderr] error: expected parameter name, found `:`
[INFO] [stderr]    --> examples/interpreter/parser.rs:356:33
[INFO] [stderr]     |
[INFO] [stderr] 356 |             "!=" => (Box::new(|&: a:AST, b:AST| BinOp(NE, Box::new(a.clone()), Box::new(b.clone())))) as Box<Fn(AST, AST) -> AST>,
[INFO] [stderr]     |                                 ^ expected parameter name
[INFO] [stderr] 
[INFO] [stderr] error: expected parameter name, found `:`
[INFO] [stderr]    --> examples/interpreter/parser.rs:357:32
[INFO] [stderr]     |
[INFO] [stderr] 357 |             ">" => (Box::new(|&: a:AST, b:AST| BinOp(GT, Box::new(a.clone()), Box::new(b.clone())))) as Box<Fn(AST, AST) -> AST>,
[INFO] [stderr]     |                                ^ expected parameter name
[INFO] [stderr] 
[INFO] [stderr] error: expected parameter name, found `:`
[INFO] [stderr]    --> examples/interpreter/parser.rs:358:33
[INFO] [stderr]     |
[INFO] [stderr] 358 |             ">=" => (Box::new(|&: a:AST, b:AST| BinOp(GE, Box::new(a.clone()), Box::new(b.clone())))) as Box<Fn(AST, AST) -> AST>,
[INFO] [stderr]     |                                 ^ expected parameter name
[INFO] [stderr] 
[INFO] [stderr] error: expected parameter name, found `:`
[INFO] [stderr]    --> examples/interpreter/parser.rs:359:32
[INFO] [stderr]     |
[INFO] [stderr] 359 |             "<" => (Box::new(|&: a:AST, b:AST| BinOp(LT, Box::new(a.clone()), Box::new(b.clone())))) as Box<Fn(AST, AST) -> AST>,
[INFO] [stderr]     |                                ^ expected parameter name
[INFO] [stderr] 
[INFO] [stderr] error: expected parameter name, found `:`
[INFO] [stderr]    --> examples/interpreter/parser.rs:360:33
[INFO] [stderr]     |
[INFO] [stderr] 360 |             "<=" => (Box::new(|&: a:AST, b:AST| BinOp(LE, Box::new(a.clone()), Box::new(b.clone())))) as Box<Fn(AST, AST) -> AST>,
[INFO] [stderr]     |                                 ^ expected parameter name
[INFO] [stderr] 
[INFO] [stderr] error: expected parameter name, found `:`
[INFO] [stderr]    --> examples/interpreter/parser.rs:369:33
[INFO] [stderr]     |
[INFO] [stderr] 369 |             "||" => (Box::new(|&: a:AST, b:AST| BinOp(LOR, Box::new(a.clone()), Box::new(b.clone())))) as Box<Fn(AST, AST) -> AST>,
[INFO] [stderr]     |                                 ^ expected parameter name
[INFO] [stderr] 
[INFO] [stderr] error: expected parameter name, found `:`
[INFO] [stderr]    --> examples/interpreter/parser.rs:370:33
[INFO] [stderr]     |
[INFO] [stderr] 370 |             "&&" => (Box::new(|&: a:AST, b:AST| BinOp(LAND, Box::new(a.clone()), Box::new(b.clone())))) as Box<Fn(AST, AST) -> AST>,
[INFO] [stderr]     |                                 ^ expected parameter name
[INFO] [stderr] 
[INFO] [stderr] error[E0432]: unresolved import `std::old_io`
[INFO] [stderr]  --> examples/interpreter/main.rs:8:10
[INFO] [stderr]   |
[INFO] [stderr] 8 | use std::old_io::File;
[INFO] [stderr]   |          ^^^^^^ could not find `old_io` in `std`
[INFO] [stderr] 
[INFO] [stderr] error: cannot find derive macro `Show` in this scope
[INFO] [stderr]   --> examples/interpreter/parser.rs:10:10
[INFO] [stderr]    |
[INFO] [stderr] 10 | #[derive(Show, Clone)]
[INFO] [stderr]    |          ^^^^
[INFO] [stderr] 
[INFO] [stderr] error: cannot find derive macro `Show` in this scope
[INFO] [stderr]   --> examples/interpreter/parser.rs:36:23
[INFO] [stderr]    |
[INFO] [stderr] 36 | #[derive(Clone, Copy, Show)]
[INFO] [stderr]    |                       ^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `Path`
[INFO] [stderr]   --> examples/interpreter/main.rs:18:16
[INFO] [stderr]    |
[INFO] [stderr] 18 |     let path = Path::new(a[1].clone());
[INFO] [stderr]    |                ^^^^ use of undeclared type or module `Path`
[INFO] [stderr] 
[INFO] [stderr] error[E0405]: cannot find trait `Show` in module `fmt`
[INFO] [stderr]   --> examples/interpreter/parser.rs:60:11
[INFO] [stderr]    |
[INFO] [stderr] 60 | impl fmt::Show for BinOps {
[INFO] [stderr]    |           ^^^^ not found in `fmt`
[INFO] [stderr] 
[INFO] [stderr] error[E0425]: cannot find function `range` in this scope
[INFO] [stderr]    --> examples/interpreter/interpreter.rs:453:26
[INFO] [stderr]     |
[INFO] [stderr] 453 |                 for i in range(0, r) {
[INFO] [stderr]     |                          ^^^^^ not found in this scope
[INFO] [stderr] 
[INFO] [stderr] error[E0425]: cannot find function `args` in module `os`
[INFO] [stderr]   --> examples/interpreter/main.rs:17:17
[INFO] [stderr]    |
[INFO] [stderr] 17 |     let a = os::args();
[INFO] [stderr]    |                 ^^^^ not found in `os`
[INFO] [stderr] help: possible candidate is found in another module, you can import it into scope
[INFO] [stderr]    |
[INFO] [stderr] 7  | use std::env::args;
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> examples/interpreter/main.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(box_patterns)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> examples/interpreter/main.rs:2:1
[INFO] [stderr]   |
[INFO] [stderr] 2 | #![feature(slicing_syntax)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> examples/interpreter/main.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | #![feature(box_syntax)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 23 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0405, E0425, E0432, E0433, E0554.
[INFO] [stderr] For more information about an error, try `rustc --explain E0405`.
[INFO] [stderr] error: could not compile `topdown-rs`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "ac58164c9216f0534921902592a3c29170bf088638bef32372bebf7e0cf6c2a0"`
[INFO] running `"docker" "rm" "-f" "ac58164c9216f0534921902592a3c29170bf088638bef32372bebf7e0cf6c2a0"`
[INFO] [stdout] ac58164c9216f0534921902592a3c29170bf088638bef32372bebf7e0cf6c2a0