[INFO] fetching crate conftaal 0.1.1...
[INFO] testing conftaal-0.1.1 against beta-2020-06-03 for beta-1.45-1
[INFO] extracting crate conftaal 0.1.1 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate conftaal 0.1.1 on toolchain beta-2020-06-03
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate conftaal 0.1.1
[INFO] finished tweaking crates.io crate conftaal 0.1.1
[INFO] tweaked toml for crates.io crate conftaal 0.1.1 written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-06-03" "build" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] fbbba800a70654be45b08bec94309238854feaa5dc9e1b1567fe0230bb432bdd
[INFO] running `"docker" "start" "-a" "fbbba800a70654be45b08bec94309238854feaa5dc9e1b1567fe0230bb432bdd"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling conftaal v0.1.1 (/opt/rustwide/workdir)
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]   --> src/parse/mod.rs:56:8
[INFO] [stderr]    |
[INFO] [stderr] 56 |                 'a'...'z' | 'A'...'Z' | '_' => 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/parse/mod.rs:56:20
[INFO] [stderr]    |
[INFO] [stderr] 56 |                 '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/parse/mod.rs:57:8
[INFO] [stderr]    |
[INFO] [stderr] 57 |                 '0'...'9' => !start,
[INFO] [stderr]    |                    ^^^ help: use `..=` for an inclusive range
[INFO] [stderr] 
[INFO] [stderr] error[E0499]: cannot borrow `*current` as mutable more than once at a time
[INFO] [stderr]    --> src/parse/mod.rs:287:19
[INFO] [stderr]     |
[INFO] [stderr] 269 |   fn find_lhs<'a, 'b>(
[INFO] [stderr]     |                   -- lifetime `'b` defined here
[INFO] [stderr] ...
[INFO] [stderr] 278 |                   op: e_op,
[INFO] [stderr]     |                       ---- first mutable borrow occurs here
[INFO] [stderr] ...
[INFO] [stderr] 283 |                   expr = Rc::get_mut(match e_op {
[INFO] [stderr]     |  ________________________-
[INFO] [stderr] 284 | |                     Op::UnaryOp{rhs, ..} | Op::BinaryOp{rhs, ..} => rhs
[INFO] [stderr] 285 | |                 }).unwrap();
[INFO] [stderr]     | |__________________- argument requires that `current.op` is borrowed for `'b`
[INFO] [stderr] 286 |               }
[INFO] [stderr] 287 |               _ => return Ok(current)
[INFO] [stderr]     |                              ^^^^^^^ second mutable borrow occurs here
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error; 3 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0499`.
[INFO] [stderr] error: could not compile `conftaal`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "fbbba800a70654be45b08bec94309238854feaa5dc9e1b1567fe0230bb432bdd"`
[INFO] running `"docker" "rm" "-f" "fbbba800a70654be45b08bec94309238854feaa5dc9e1b1567fe0230bb432bdd"`
[INFO] [stdout] fbbba800a70654be45b08bec94309238854feaa5dc9e1b1567fe0230bb432bdd