[INFO] updating cached repository owainlewis/rsc
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/owainlewis/rsc
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/owainlewis/rsc" "work/ex/beta-1.38-1/sources/1.37.0/gh/owainlewis/rsc"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/owainlewis/rsc'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/owainlewis/rsc" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/owainlewis/rsc"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/owainlewis/rsc'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] ab09fadcbead42ab1c85177f0e77781a35273426
[INFO] sha for GitHub repo owainlewis/rsc: ab09fadcbead42ab1c85177f0e77781a35273426
[INFO] validating manifest of owainlewis/rsc on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of owainlewis/rsc on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing owainlewis/rsc
[INFO] finished frobbing owainlewis/rsc
[INFO] frobbed toml for owainlewis/rsc written to work/ex/beta-1.38-1/sources/1.37.0/gh/owainlewis/rsc/Cargo.toml
[INFO] started frobbing owainlewis/rsc
[INFO] finished frobbing owainlewis/rsc
[INFO] frobbed toml for owainlewis/rsc written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/owainlewis/rsc/Cargo.toml
[INFO] crate owainlewis/rsc already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "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] testing owainlewis/rsc against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/owainlewis/rsc:/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=warn" "-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" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] 5e07e875ad14026e93110f9c2a61b0cbf2e3a75d8c4b400bff3b175ad09f90d1
[INFO] running `"docker" "start" "-a" "5e07e875ad14026e93110f9c2a61b0cbf2e3a75d8c4b400bff3b175ad09f90d1"`
[INFO] [stderr]    Compiling rsc v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused doc comment
[INFO] [stderr]   --> src/lexer.rs:66:21
[INFO] [stderr]    |
[INFO] [stderr] 66 |                     /// Ignore whitespace
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 67 |                     self.advance(1);
[INFO] [stderr]    |                     --------------- rustdoc does not generate documentation for expressions
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]   --> src/lexer.rs:63:27
[INFO] [stderr]    |
[INFO] [stderr] 63 |                 '-' | '0' ... '9' => lex_number(&self.input),
[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/lexer.rs:64:21
[INFO] [stderr]    |
[INFO] [stderr] 64 |                 'a' ... 'z' => lex_identifier(&self.input),
[INFO] [stderr]    |                     ^^^ help: use `..=` for an inclusive range
[INFO] [stderr] 
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]   --> src/lexer.rs:92:16
[INFO] [stderr]    |
[INFO] [stderr] 92 |            '0' ... '9' => {
[INFO] [stderr]    |                ^^^ help: use `..=` for an inclusive range
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `ind`
[INFO] [stderr]   --> src/lexer.rs:90:10
[INFO] [stderr]    |
[INFO] [stderr] 90 |     for (ind, ch) in input.char_indices() {
[INFO] [stderr]    |          ^^^ help: consider prefixing with an underscore: `_ind`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `ind`
[INFO] [stderr]    --> src/lexer.rs:104:10
[INFO] [stderr]     |
[INFO] [stderr] 104 |     for (ind, ch) in input.char_indices() {
[INFO] [stderr]     |          ^^^ help: consider prefixing with an underscore: `_ind`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `size`
[INFO] [stderr]   --> src/lexer.rs:46:30
[INFO] [stderr]    |
[INFO] [stderr] 46 |         while let Ok((token, size)) = self.
[INFO] [stderr]    |                              ^^^^ help: consider prefixing with an underscore: `_size`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `c`
[INFO] [stderr]   --> src/lexer.rs:70:17
[INFO] [stderr]    |
[INFO] [stderr] 70 |                 c => {
[INFO] [stderr]    |                 ^ help: consider prefixing with an underscore: `_c`
[INFO] [stderr] 
[INFO] [stderr] error[E0499]: cannot borrow `*self` as mutable more than once at a time
[INFO] [stderr]   --> src/lexer.rs:46:39
[INFO] [stderr]    |
[INFO] [stderr] 44 |     pub fn tokens(&mut self) -> Vec<Token> {
[INFO] [stderr]    |                   - let's call the lifetime of this reference `'1`
[INFO] [stderr] 45 |         let mut tokens = Vec::new();
[INFO] [stderr] 46 |         while let Ok((token, size)) = self.
[INFO] [stderr]    |                                       ^^^^ mutable borrow starts here in previous iteration of loop
[INFO] [stderr] ...
[INFO] [stderr] 54 |         return tokens
[INFO] [stderr]    |                ------ returning this value requires that `*self` is borrowed for `'1`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0499`.
[INFO] [stderr] error: Could not compile `rsc`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "5e07e875ad14026e93110f9c2a61b0cbf2e3a75d8c4b400bff3b175ad09f90d1"`
[INFO] running `"docker" "rm" "-f" "5e07e875ad14026e93110f9c2a61b0cbf2e3a75d8c4b400bff3b175ad09f90d1"`
[INFO] [stdout] 5e07e875ad14026e93110f9c2a61b0cbf2e3a75d8c4b400bff3b175ad09f90d1