[INFO] updating cached repository codesections/mnemonic
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/codesections/mnemonic
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/codesections/mnemonic" "work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/codesections/mnemonic"`
[INFO] [stderr] Cloning into 'work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/codesections/mnemonic'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/codesections/mnemonic" "work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/codesections/mnemonic"`
[INFO] [stderr] Cloning into 'work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/codesections/mnemonic'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] c63b320f2a323cd661cc51ceb520f86c80cb8af9
[INFO] sha for GitHub repo codesections/mnemonic: c63b320f2a323cd661cc51ceb520f86c80cb8af9
[INFO] validating manifest of codesections/mnemonic on toolchain master#60960a260f7b5c695fd0717311d72ce62dd4eb43
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of codesections/mnemonic on toolchain try#266783e4e09e4e9d5307c1c8e695659c58bbcac7
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing codesections/mnemonic
[INFO] finished frobbing codesections/mnemonic
[INFO] frobbed toml for codesections/mnemonic written to work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/codesections/mnemonic/Cargo.toml
[INFO] started frobbing codesections/mnemonic
[INFO] finished frobbing codesections/mnemonic
[INFO] frobbed toml for codesections/mnemonic written to work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/codesections/mnemonic/Cargo.toml
[INFO] crate codesections/mnemonic already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] checking codesections/mnemonic against try#266783e4e09e4e9d5307c1c8e695659c58bbcac7 for pr-63376
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-63376/worker-3/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/codesections/mnemonic:/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=forbid" "-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" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 5d8c963aded88b6368e5856aa24b78725565eecc100a8b2e0f7f89326db19964
[INFO] running `"docker" "start" "-a" "5d8c963aded88b6368e5856aa24b78725565eecc100a8b2e0f7f89326db19964"`
[INFO] [stderr]    Compiling ident_case v1.0.0
[INFO] [stderr]    Compiling fnv v1.0.6
[INFO] [stderr]    Compiling derive_builder v0.7.0
[INFO] [stderr]     Checking treeline v0.1.0
[INFO] [stderr]     Checking either v1.5.0
[INFO] [stderr]     Checking normalize-line-endings v0.2.2
[INFO] [stderr]     Checking predicates-core v1.0.0
[INFO] [stderr]     Checking shell-words v0.1.0
[INFO] [stderr]     Checking roff v0.1.0
[INFO] [stderr]     Checking open v1.2.2
[INFO] [stderr]    Compiling onig_sys v69.1.0
[INFO] [stderr]     Checking crossbeam-utils v0.6.5
[INFO] [stderr]    Compiling ansi_colours v1.0.1
[INFO] [stderr]     Checking colored v1.7.0
[INFO] [stderr]     Checking predicates-tree v1.0.0
[INFO] [stderr]     Checking rand_os v0.1.1
[INFO] [stderr]     Checking termios v0.3.1
[INFO] [stderr]     Checking clicolors-control v0.2.0
[INFO] [stderr]     Checking directories v1.0.2
[INFO] [stderr]     Checking rand_chacha v0.1.1
[INFO] [stderr]     Checking miniz-sys v0.1.11
[INFO] [stderr]     Checking man v0.3.0
[INFO] [stderr]     Checking serde_json v1.0.37
[INFO] [stderr]     Checking bincode v1.0.1
[INFO] [stderr]     Checking toml v0.4.10
[INFO] [stderr]     Checking float-cmp v0.4.0
[INFO] [stderr]    Compiling syn v0.15.26
[INFO] [stderr]     Checking content_inspector v0.2.4
[INFO] [stderr]     Checking combine v3.6.6
[INFO] [stderr]     Checking crossbeam-channel v0.3.8
[INFO] [stderr]     Checking plist v0.3.0
[INFO] [stderr]     Checking flate2 v1.0.6
[INFO] [stderr]     Checking regex v1.1.0
[INFO] [stderr]     Checking rand v0.6.4
[INFO] [stderr]     Checking globset v0.4.2
[INFO] [stderr]     Checking predicates v1.0.0
[INFO] [stderr]     Checking ignore v0.4.6
[INFO] [stderr]     Checking parking_lot_core v0.4.0
[INFO] [stderr]     Checking tempfile v3.0.5
[INFO] [stderr]     Checking parking_lot v0.7.1
[INFO] [stderr]     Checking globwalk v0.5.0
[INFO] [stderr]     Checking assert_fs v0.11.3
[INFO] [stderr]     Checking console v0.6.2
[INFO] [stderr]     Checking onig v4.3.1
[INFO] [stderr]    Compiling darling_core v0.8.3
[INFO] [stderr]    Compiling serde_derive v1.0.85
[INFO] [stderr]    Compiling darling_macro v0.8.3
[INFO] [stderr]    Compiling darling v0.8.3
[INFO] [stderr]    Compiling derive_builder_core v0.4.0
[INFO] [stderr]     Checking toml_edit v0.1.3
[INFO] [stderr]     Checking syntect v3.0.2
[INFO] [stderr] error[E0502]: cannot borrow `v` as immutable because it is also borrowed as mutable
[INFO] [stderr]   --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/toml_edit-0.1.3/src/index.rs:55:65
[INFO] [stderr]    |
[INFO] [stderr] 44 |       fn index_or_insert<'v>(&self, v: &'v mut Item) -> &'v mut Item {
[INFO] [stderr]    |                          -- lifetime `'v` defined here
[INFO] [stderr] 45 | /         match *v {
[INFO] [stderr] 46 | |             Item::ArrayOfTables(ref mut vec) => {
[INFO] [stderr] 47 | |                 vec.values.get_mut(*self).expect("index out of bounds")
[INFO] [stderr] 48 | |             }
[INFO] [stderr] 49 | |             Item::Value(ref mut a) if a.is_array() => a
[INFO] [stderr]    | |                         --------- mutable borrow occurs here
[INFO] [stderr] ...  |
[INFO] [stderr] 55 | |             _ => panic!("cannot access index {} in {:?}", self, v),
[INFO] [stderr]    | |                                                                 ^ immutable borrow occurs here
[INFO] [stderr] 56 | |         }
[INFO] [stderr]    | |_________- returning this value requires that `v.0` is borrowed for `'v`
[INFO] [stderr] 
[INFO] [stderr] error[E0502]: cannot borrow `v` as immutable because it is also borrowed as mutable
[INFO] [stderr]   --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/toml_edit-0.1.3/src/index.rs:88:63
[INFO] [stderr]    |
[INFO] [stderr] 70 |       fn index_or_insert<'v>(&self, v: &'v mut Item) -> &'v mut Item {
[INFO] [stderr]    |                          -- lifetime `'v` defined here
[INFO] [stderr] ...
[INFO] [stderr] 77 | /         match *v {
[INFO] [stderr] 78 | |             Item::Table(ref mut t) => t.entry(self).or_insert(Item::None),
[INFO] [stderr] 79 | |             Item::Value(ref mut v) if v.is_inline_table() => {
[INFO] [stderr]    | |                         --------- mutable borrow occurs here
[INFO] [stderr] 80 | |                 &mut v
[INFO] [stderr] ...  |
[INFO] [stderr] 88 | |             _ => panic!("cannot access key {} in {:?}", self, v),
[INFO] [stderr]    | |                                                               ^ immutable borrow occurs here
[INFO] [stderr] 89 | |         }
[INFO] [stderr]    | |_________- returning this value requires that `v.0` is borrowed for `'v`
[INFO] [stderr] 
[INFO] [stderr]     Checking prettyprint v0.4.1
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0502`.
[INFO] [stderr] error: Could not compile `toml_edit`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "5d8c963aded88b6368e5856aa24b78725565eecc100a8b2e0f7f89326db19964"`
[INFO] running `"docker" "rm" "-f" "5d8c963aded88b6368e5856aa24b78725565eecc100a8b2e0f7f89326db19964"`
[INFO] [stdout] 5d8c963aded88b6368e5856aa24b78725565eecc100a8b2e0f7f89326db19964