[INFO] crate algs4 0.7.0 is already in cache
[INFO] testing algs4-0.7.0 against master#8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e for pr-74409
[INFO] extracting crate algs4 0.7.0 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate algs4 0.7.0 on toolchain 8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate algs4 0.7.0
[INFO] finished tweaking crates.io crate algs4 0.7.0
[INFO] tweaked toml for crates.io crate algs4 0.7.0 written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: dependency (sdl2) specified without providing a local path, Git repository, or version to use. This will be considered an error in future versions
[INFO] [stderr] warning: dependency (sdl2_gfx) specified without providing a local path, Git repository, or version to use. This will be considered an error in future versions
[INFO] [stderr] warning: unused manifest key: dev-dependencies.sdl2.sdl2
[INFO] [stderr] warning: unused manifest key: dev-dependencies.sdl2_gfx.sdl2_gfx
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "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_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:38e1b949b06cde1964af550a6e548bd9b2b2ea170003ae122f8fc0886596cc07" "/opt/rustwide/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] f668df2dd72cf7f741ab047e74e20f5426d2508829b023b2d256bc871050d08a
[INFO] running `Command { std: "docker" "start" "-a" "f668df2dd72cf7f741ab047e74e20f5426d2508829b023b2d256bc871050d08a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f668df2dd72cf7f741ab047e74e20f5426d2508829b023b2d256bc871050d08a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f668df2dd72cf7f741ab047e74e20f5426d2508829b023b2d256bc871050d08a", kill_on_drop: false }`
[INFO] [stdout] f668df2dd72cf7f741ab047e74e20f5426d2508829b023b2d256bc871050d08a
[INFO] running `Command { std: "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=forbid" "-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@sha256:38e1b949b06cde1964af550a6e548bd9b2b2ea170003ae122f8fc0886596cc07" "/opt/rustwide/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c05a3b70f09d57d9ca8f03bdfeb3ac1bcb34b9b3d24dc8f5fe1cd2dd2b0f78a7
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "c05a3b70f09d57d9ca8f03bdfeb3ac1bcb34b9b3d24dc8f5fe1cd2dd2b0f78a7", kill_on_drop: false }`
[INFO] [stderr] warning: dependency (sdl2) specified without providing a local path, Git repository, or version to use. This will be considered an error in future versions
[INFO] [stderr] warning: dependency (sdl2_gfx) specified without providing a local path, Git repository, or version to use. This will be considered an error in future versions
[INFO] [stderr] warning: unused manifest key: dev-dependencies.sdl2.sdl2
[INFO] [stderr] warning: unused manifest key: dev-dependencies.sdl2_gfx.sdl2_gfx
[INFO] [stderr]    Compiling autocfg v1.0.0
[INFO] [stderr]    Compiling rustc-serialize v0.3.24
[INFO] [stderr]    Compiling vec_map v0.6.0
[INFO] [stderr]    Compiling byteorder v0.3.13
[INFO] [stderr]    Compiling rand v0.4.6
[INFO] [stderr]    Compiling num-traits v0.2.12
[INFO] [stderr]    Compiling num-integer v0.1.43
[INFO] [stderr]    Compiling num-iter v0.1.41
[INFO] [stderr]    Compiling rand v0.3.23
[INFO] [stderr]    Compiling adivon v0.2.6
[INFO] [stderr]    Compiling num-bigint v0.1.44
[INFO] [stderr]    Compiling num-complex v0.1.43
[INFO] [stderr]    Compiling num-rational v0.1.42
[INFO] [stderr]    Compiling num v0.1.42
[INFO] [stderr]    Compiling mtl v0.1.5
[INFO] [stderr]    Compiling algs4 v0.7.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0433]: failed to resolve: global paths cannot start with `self`
[INFO] [stdout]   --> src/sorting/mod.rs:53:11
[INFO] [stdout]    |
[INFO] [stdout] 53 | pub use ::self::mergesort::{merge_sort, merge_bu_sort};
[INFO] [stdout]    |           ^^^^ global paths cannot start with `self`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: global paths cannot start with `self`
[INFO] [stdout]   --> src/sorting/mod.rs:59:11
[INFO] [stdout]    |
[INFO] [stdout] 59 | pub use ::self::quicksort::quick_sort;
[INFO] [stdout]    |           ^^^^ global paths cannot start with `self`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: global paths cannot start with `self`
[INFO] [stdout]   --> src/sorting/mod.rs:64:11
[INFO] [stdout]    |
[INFO] [stdout] 64 | pub use ::self::heapsort::heap_sort;
[INFO] [stdout]    |           ^^^^ global paths cannot start with `self`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `mtl::array`
[INFO] [stdout]  --> src/context/linear_programming.rs:5:10
[INFO] [stdout]   |
[INFO] [stdout] 5 | use mtl::array::{Array, ArrayType, concatenate};
[INFO] [stdout]   |          ^^^^^ could not find `array` in `mtl`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> src/fundamentals/stacks_and_queues/resizing_array_queue.rs:183:17
[INFO] [stdout]     |
[INFO] [stdout] 183 |                 try!(write!(f, "{:?}, ", item.as_ref().unwrap()));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> src/fundamentals/stacks_and_queues/resizing_array_queue.rs:187:17
[INFO] [stdout]     |
[INFO] [stdout] 187 |                 try!(write!(f, "{:?}, ", item));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> src/fundamentals/stacks_and_queues/resizing_array_queue.rs:190:17
[INFO] [stdout]     |
[INFO] [stdout] 190 |                 try!(write!(f, "{:?}, ", item));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]   --> src/fundamentals/stacks_and_queues/bag.rs:19:9
[INFO] [stdout]    |
[INFO] [stdout] 19 |         try!(write!(f, "{:?}, ", node.val));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]   --> src/fundamentals/stacks_and_queues/bag.rs:42:9
[INFO] [stdout]    |
[INFO] [stdout] 42 |         try!(write!(f, "["));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]   --> src/fundamentals/stacks_and_queues/bag.rs:43:9
[INFO] [stdout]    |
[INFO] [stdout] 43 |         try!(write_node_to_formatter(f, self.s.as_ref()));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> src/fundamentals/stacks_and_queues/linked_deque.rs:156:17
[INFO] [stdout]     |
[INFO] [stdout] 156 |                 try!(write!(f, "<empty deque>"));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> src/fundamentals/stacks_and_queues/linked_deque.rs:159:17
[INFO] [stdout]     |
[INFO] [stdout] 159 |                 try!(write!(f, "("));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> src/fundamentals/stacks_and_queues/linked_deque.rs:162:21
[INFO] [stdout]     |
[INFO] [stdout] 162 |                     try!(write!(f, "{},", p.unwrap().item));
[INFO] [stdout]     |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> src/fundamentals/stacks_and_queues/linked_deque.rs:165:17
[INFO] [stdout]     |
[INFO] [stdout] 165 |                 try!(write!(f, ")"));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> src/fundamentals/stacks_and_queues/resizing_array_randomized_queue.rs:109:9
[INFO] [stdout]     |
[INFO] [stdout] 109 |         try!(write!(f, "{:?}", self.q));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]   --> src/fundamentals/union_find/quick_find.rs:37:13
[INFO] [stdout]    |
[INFO] [stdout] 37 |             try!(write!(f, "{} ", i));
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]   --> src/fundamentals/union_find/quick_union.rs:44:13
[INFO] [stdout]    |
[INFO] [stdout] 44 |             try!(write!(f, "{} ", i));
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]   --> src/fundamentals/union_find/weighted_quick_union.rs:55:13
[INFO] [stdout]    |
[INFO] [stdout] 55 |             try!(write!(f, "{} ", i));
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]   --> src/fundamentals/union_find/improved.rs:67:13
[INFO] [stdout]    |
[INFO] [stdout] 67 |             try!(write!(f, "{} ", i));
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]   --> src/strings/data_compression/bits.rs:70:13
[INFO] [stdout]    |
[INFO] [stdout] 70 |             try!(self.inner.write_u8(self.byte));
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]   --> src/strings/data_compression/bits.rs:79:9
[INFO] [stdout]    |
[INFO] [stdout] 79 |         try!(self.inner.write_u8((self.byte << ofs) | (s >> self.bits)));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]   --> src/strings/data_compression/bits.rs:90:13
[INFO] [stdout]    |
[INFO] [stdout] 90 |             try!(self.write_u8(byte as u8));
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]   --> src/strings/data_compression/bits.rs:95:13
[INFO] [stdout]    |
[INFO] [stdout] 95 |             try!(self.write_bit(Bit::from_u8((remain >> (w-1)) as u8)));
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> src/strings/data_compression/bits.rs:102:9
[INFO] [stdout]     |
[INFO] [stdout] 102 |         try!(self.write_u8((s >> 8) as u8));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> src/strings/data_compression/bits.rs:107:9
[INFO] [stdout]     |
[INFO] [stdout] 107 |         try!(self.write_u16((s >> 16) as u16));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> src/strings/data_compression/bits.rs:113:9
[INFO] [stdout]     |
[INFO] [stdout] 113 |         try!(self.inner.flush());
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> src/strings/data_compression/bits.rs:145:25
[INFO] [stdout]     |
[INFO] [stdout] 145 |             self.byte = try!(self.inner.read_u8());
[INFO] [stdout]     |                         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> src/strings/data_compression/bits.rs:156:16
[INFO] [stdout]     |
[INFO] [stdout] 156 |             Ok(try!(self.inner.read_u8()))
[INFO] [stdout]     |                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> src/strings/data_compression/bits.rs:158:24
[INFO] [stdout]     |
[INFO] [stdout] 158 |             let next = try!(self.inner.read_u8());
[INFO] [stdout]     |                        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> src/strings/data_compression/bits.rs:169:28
[INFO] [stdout]     |
[INFO] [stdout] 169 |             r = (r << 8) + try!(self.read_u8()) as usize;
[INFO] [stdout]     |                            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> src/strings/data_compression/bits.rs:173:28
[INFO] [stdout]     |
[INFO] [stdout] 173 |             r = (r << 1) + try!(self.read_bit()).to_u8() as usize;
[INFO] [stdout]     |                            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]   --> src/strings/data_compression/huffman.rs:47:21
[INFO] [stdout]    |
[INFO] [stdout] 47 |                     try!(w.write_bit(One));
[INFO] [stdout]    |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]   --> src/strings/data_compression/huffman.rs:48:21
[INFO] [stdout]    |
[INFO] [stdout] 48 |                     try!(w.write_u8(ch));
[INFO] [stdout]    |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]   --> src/strings/data_compression/huffman.rs:51:21
[INFO] [stdout]    |
[INFO] [stdout] 51 |                     try!(w.write_bit(Zero));
[INFO] [stdout]    |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]   --> src/strings/data_compression/huffman.rs:52:21
[INFO] [stdout]    |
[INFO] [stdout] 52 |                     try!(Node::write(left.as_ref(), w));
[INFO] [stdout]    |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]   --> src/strings/data_compression/huffman.rs:53:21
[INFO] [stdout]    |
[INFO] [stdout] 53 |                     try!(Node::write(right.as_ref(), w));
[INFO] [stdout]    |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]   --> src/strings/data_compression/huffman.rs:61:19
[INFO] [stdout]    |
[INFO] [stdout] 61 |         let bit = try!(r.read_bit());
[INFO] [stdout]    |                   ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]   --> src/strings/data_compression/huffman.rs:64:52
[INFO] [stdout]    |
[INFO] [stdout] 64 |                 Ok(Some(Box::new(Node::new_leaf(0, try!(r.read_u8())))))
[INFO] [stdout]    |                                                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]   --> src/strings/data_compression/huffman.rs:67:28
[INFO] [stdout]    |
[INFO] [stdout] 67 |                 let left = try!(Node::read(r)).map(|n| *n);
[INFO] [stdout]    |                            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]   --> src/strings/data_compression/huffman.rs:68:29
[INFO] [stdout]    |
[INFO] [stdout] 68 |                 let right = try!(Node::read(r)).map(|n| *n);
[INFO] [stdout]    |                             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> src/strings/data_compression/huffman.rs:217:9
[INFO] [stdout]     |
[INFO] [stdout] 217 |         try!(buf.write_u32::<LittleEndian>(self.len() as u32));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> src/strings/data_compression/huffman.rs:223:21
[INFO] [stdout]     |
[INFO] [stdout] 223 |                     try!(out.write_bit(b));
[INFO] [stdout]     |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]    --> src/strings/data_compression/huffman.rs:245:19
[INFO] [stdout]     |
[INFO] [stdout] 245 |         let len = try!(inbuf.read_u32::<LittleEndian>()) as usize;
[INFO] [stdout]     |                   ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]   --> src/strings/data_compression/lzw.rs:38:17
[INFO] [stdout]    |
[INFO] [stdout] 38 |                 try!(out.write_usize(*st.get(s).unwrap() as usize, W));
[INFO] [stdout]    |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]   --> src/strings/data_compression/lzw.rs:45:13
[INFO] [stdout]    |
[INFO] [stdout] 45 |             try!(out.write_usize(R, W));
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]   --> src/strings/data_compression/lzw.rs:62:28
[INFO] [stdout]    |
[INFO] [stdout] 62 |         let mut codeword = try!(inbits.read_usize(W));
[INFO] [stdout]    |                            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]   --> src/strings/data_compression/lzw.rs:71:13
[INFO] [stdout]    |
[INFO] [stdout] 71 |             try!(buf.write_all(&val));
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]   --> src/strings/data_compression/lzw.rs:72:24
[INFO] [stdout]    |
[INFO] [stdout] 72 |             codeword = try!(inbits.read_usize(W));
[INFO] [stdout]    |                        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]   --> src/strings/data_compression/mod.rs:27:17
[INFO] [stdout]    |
[INFO] [stdout] 27 |                 try!(out.write_bit(bit));
[INFO] [stdout]    |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]   --> src/strings/data_compression/mod.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 32 |         try!(out.flush_bits());
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]   --> src/strings/data_compression/mod.rs:51:17
[INFO] [stdout]    |
[INFO] [stdout] 51 |                 try!(buf.write_u8(run));
[INFO] [stdout]    |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]   --> src/strings/data_compression/mod.rs:57:21
[INFO] [stdout]    |
[INFO] [stdout] 57 |                     try!(buf.write_u8(run));
[INFO] [stdout]    |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]   --> src/strings/data_compression/mod.rs:59:21
[INFO] [stdout]    |
[INFO] [stdout] 59 |                     try!(buf.write_u8(run));
[INFO] [stdout]    |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]   --> src/strings/data_compression/mod.rs:65:9
[INFO] [stdout]    |
[INFO] [stdout] 65 |         try!(buf.write_u8(run));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]   --> src/context/linear_programming.rs:19:9
[INFO] [stdout]    |
[INFO] [stdout] 19 |         try!(writeln!(f, "M = {}", m));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]   --> src/context/linear_programming.rs:20:9
[INFO] [stdout]    |
[INFO] [stdout] 20 |         try!(writeln!(f, "N = {}", n));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]   --> src/context/linear_programming.rs:23:17
[INFO] [stdout]    |
[INFO] [stdout] 23 |                 try!(write!(f, "{:7.2}", self.a[[i,j]]));
[INFO] [stdout]    |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]   --> src/context/linear_programming.rs:25:13
[INFO] [stdout]    |
[INFO] [stdout] 25 |             try!(writeln!(f, ""));
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]   --> src/context/linear_programming.rs:28:9
[INFO] [stdout]    |
[INFO] [stdout] 28 |         try!(writeln!(f, "value = {}", self.value()));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stdout]   --> src/context/linear_programming.rs:31:17
[INFO] [stdout]    |
[INFO] [stdout] 31 |                 try!(writeln!(f, "x_{} = {}", self.basis[i], self.a[[i,m+n]]));
[INFO] [stdout]    |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `#[macro_use]` import
[INFO] [stdout]  --> src/lib.rs:6:1
[INFO] [stdout]   |
[INFO] [stdout] 6 | #[macro_use]
[INFO] [stdout]   | ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/fundamentals/stacks_and_queues/mod.rs:74:23
[INFO] [stdout]    |
[INFO] [stdout] 74 |     fn iter(&self) -> Iterator<Item=T>;
[INFO] [stdout]    |                       ^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item=T>`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `self::Node::*`
[INFO] [stdout]  --> src/strings/data_compression/huffman.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use self::Node::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'std::hash::SipHasher': use `std::collections::hash_map::DefaultHasher` instead
[INFO] [stdout]  --> src/searching/hash_tables/separate_chaining.rs:1:31
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::hash::{Hash, Hasher, SipHasher};
[INFO] [stdout]   |                               ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'std::hash::SipHasher': use `std::collections::hash_map::DefaultHasher` instead
[INFO] [stdout]   --> src/searching/hash_tables/separate_chaining.rs:51:26
[INFO] [stdout]    |
[INFO] [stdout] 51 |         let mut hasher = SipHasher::new();
[INFO] [stdout]    |                          ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'std::hash::SipHasher': use `std::collections::hash_map::DefaultHasher` instead
[INFO] [stdout]  --> src/searching/hash_tables/linear_probing.rs:1:31
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::hash::{Hash, Hasher, SipHasher};
[INFO] [stdout]   |                               ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'std::hash::SipHasher': use `std::collections::hash_map::DefaultHasher` instead
[INFO] [stdout]   --> src/searching/hash_tables/linear_probing.rs:27:26
[INFO] [stdout]    |
[INFO] [stdout] 27 |         let mut hasher = SipHasher::new();
[INFO] [stdout]    |                          ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `#[inline]` is ignored on function prototypes
[INFO] [stdout]   --> src/geometric_search/kd_tree.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 18 |     #[inline]
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_attributes)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'std::hash::SipHasher::new': use `std::collections::hash_map::DefaultHasher` instead
[INFO] [stdout]   --> src/searching/hash_tables/separate_chaining.rs:51:26
[INFO] [stdout]    |
[INFO] [stdout] 51 |         let mut hasher = SipHasher::new();
[INFO] [stdout]    |                          ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'std::hash::SipHasher::new': use `std::collections::hash_map::DefaultHasher` instead
[INFO] [stdout]   --> src/searching/hash_tables/linear_probing.rs:27:26
[INFO] [stdout]    |
[INFO] [stdout] 27 |         let mut hasher = SipHasher::new();
[INFO] [stdout]    |                          ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `char_at` found for reference `&'a str` in the current scope
[INFO] [stdout]   --> src/strings/mod.rs:35:22
[INFO] [stdout]    |
[INFO] [stdout] 35 |         dfa[self.pat.char_at(0) as usize][0] = 1;
[INFO] [stdout]    |                      ^^^^^^^ method not found in `&'a str`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `char_at` found for reference `&'a str` in the current scope
[INFO] [stdout]   --> src/strings/mod.rs:41:26
[INFO] [stdout]    |
[INFO] [stdout] 41 |             dfa[self.pat.char_at(j) as usize][j] = j+1; // set match case
[INFO] [stdout]    |                          ^^^^^^^ method not found in `&'a str`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `char_at` found for reference `&'a str` in the current scope
[INFO] [stdout]   --> src/strings/mod.rs:42:30
[INFO] [stdout]    |
[INFO] [stdout] 42 |             x = dfa[self.pat.char_at(j) as usize][x];   // update restart state
[INFO] [stdout]    |                              ^^^^^^^ method not found in `&'a str`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `char_at` found for reference `&str` in the current scope
[INFO] [stdout]   --> src/strings/mod.rs:53:30
[INFO] [stdout]    |
[INFO] [stdout] 53 |             j = self.dfa[txt.char_at(i) as usize][j];
[INFO] [stdout]    |                              ^^^^^^^ method not found in `&str`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `char_at` found for reference `&'a str` in the current scope
[INFO] [stdout]   --> src/strings/mod.rs:98:33
[INFO] [stdout]    |
[INFO] [stdout] 98 |             self.right[self.pat.char_at(j) as usize] = j as isize;
[INFO] [stdout]    |                                 ^^^^^^^ method not found in `&'a str`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `char_at` found for reference `&'a str` in the current scope
[INFO] [stdout]    --> src/strings/mod.rs:113:29
[INFO] [stdout]     |
[INFO] [stdout] 113 |                 if self.pat.char_at(j) != txt.char_at(i+j) {
[INFO] [stdout]     |                             ^^^^^^^ method not found in `&'a str`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `char_at` found for reference `&str` in the current scope
[INFO] [stdout]    --> src/strings/mod.rs:113:47
[INFO] [stdout]     |
[INFO] [stdout] 113 |                 if self.pat.char_at(j) != txt.char_at(i+j) {
[INFO] [stdout]     |                                               ^^^^^^^ method not found in `&str`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `char_at` found for reference `&str` in the current scope
[INFO] [stdout]    --> src/strings/mod.rs:114:56
[INFO] [stdout]     |
[INFO] [stdout] 114 |                     skip = j as isize - self.right[txt.char_at(i+j) as usize];
[INFO] [stdout]     |                                                        ^^^^^^^ method not found in `&str`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `char_at` found for reference `&str` in the current scope
[INFO] [stdout]    --> src/strings/mod.rs:176:30
[INFO] [stdout]     |
[INFO] [stdout] 176 |             h = (r * h + key.char_at(j) as usize) % q
[INFO] [stdout]     |                              ^^^^^^^ method not found in `&str`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `char_at` found for reference `&'a str` in the current scope
[INFO] [stdout]    --> src/strings/mod.rs:183:25
[INFO] [stdout]     |
[INFO] [stdout] 183 |             if self.pat.char_at(j) != txt.char_at(i+j) {
[INFO] [stdout]     |                         ^^^^^^^ method not found in `&'a str`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `char_at` found for reference `&str` in the current scope
[INFO] [stdout]    --> src/strings/mod.rs:183:43
[INFO] [stdout]     |
[INFO] [stdout] 183 |             if self.pat.char_at(j) != txt.char_at(i+j) {
[INFO] [stdout]     |                                           ^^^^^^^ method not found in `&str`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `char_at` found for reference `&str` in the current scope
[INFO] [stdout]    --> src/strings/mod.rs:205:59
[INFO] [stdout]     |
[INFO] [stdout] 205 |             txt_hash = (txt_hash + self.q - self.rm * txt.char_at(i-self.m) as usize % self.q) % self.q;
[INFO] [stdout]     |                                                           ^^^^^^^ method not found in `&str`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `char_at` found for reference `&str` in the current scope
[INFO] [stdout]    --> src/strings/mod.rs:206:49
[INFO] [stdout]     |
[INFO] [stdout] 206 |             txt_hash = (txt_hash * self.r + txt.char_at(i) as usize) % self.q;
[INFO] [stdout]     |                                                 ^^^^^^^ method not found in `&str`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `char_at` found for reference `&str` in the current scope
[INFO] [stdout]    --> src/strings/mod.rs:225:59
[INFO] [stdout]     |
[INFO] [stdout] 225 |             txt_hash = (txt_hash + self.q - self.rm * txt.char_at(i-self.m) as usize % self.q) % self.q;
[INFO] [stdout]     |                                                           ^^^^^^^ method not found in `&str`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `char_at` found for reference `&str` in the current scope
[INFO] [stdout]    --> src/strings/mod.rs:226:49
[INFO] [stdout]     |
[INFO] [stdout] 226 |             txt_hash = (txt_hash * self.r + txt.char_at(i) as usize) % self.q;
[INFO] [stdout]     |                                                 ^^^^^^^ method not found in `&str`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `char_at` found for reference `&str` in the current scope
[INFO] [stdout]   --> src/strings/regular_expressions/mod.rs:25:23
[INFO] [stdout]    |
[INFO] [stdout] 25 |             if regexp.char_at(i) == '(' || regexp.char_at(i) == '|' {
[INFO] [stdout]    |                       ^^^^^^^ method not found in `&str`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `char_at` found for reference `&str` in the current scope
[INFO] [stdout]   --> src/strings/regular_expressions/mod.rs:25:51
[INFO] [stdout]    |
[INFO] [stdout] 25 |             if regexp.char_at(i) == '(' || regexp.char_at(i) == '|' {
[INFO] [stdout]    |                                                   ^^^^^^^ method not found in `&str`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `char_at` found for reference `&str` in the current scope
[INFO] [stdout]   --> src/strings/regular_expressions/mod.rs:27:30
[INFO] [stdout]    |
[INFO] [stdout] 27 |             } else if regexp.char_at(i) == ')' {
[INFO] [stdout]    |                              ^^^^^^^ method not found in `&str`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `char_at` found for reference `&str` in the current scope
[INFO] [stdout]   --> src/strings/regular_expressions/mod.rs:31:27
[INFO] [stdout]    |
[INFO] [stdout] 31 |                 if regexp.char_at(or) == '|' {
[INFO] [stdout]    |                           ^^^^^^^ method not found in `&str`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `char_at` found for reference `&str` in the current scope
[INFO] [stdout]   --> src/strings/regular_expressions/mod.rs:35:34
[INFO] [stdout]    |
[INFO] [stdout] 35 |                 } else if regexp.char_at(or) == '(' {
[INFO] [stdout]    |                                  ^^^^^^^ method not found in `&str`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `char_at` found for reference `&str` in the current scope
[INFO] [stdout]   --> src/strings/regular_expressions/mod.rs:43:34
[INFO] [stdout]    |
[INFO] [stdout] 43 |             if i < m-1 && regexp.char_at(i+1) == '*' {
[INFO] [stdout]    |                                  ^^^^^^^ method not found in `&str`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `char_at` found for reference `&str` in the current scope
[INFO] [stdout]   --> src/strings/regular_expressions/mod.rs:47:23
[INFO] [stdout]    |
[INFO] [stdout] 47 |             if regexp.char_at(i) == '(' || regexp.char_at(i) == '*' || regexp.char_at(i) == ')' {
[INFO] [stdout]    |                       ^^^^^^^ method not found in `&str`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `char_at` found for reference `&str` in the current scope
[INFO] [stdout]   --> src/strings/regular_expressions/mod.rs:47:51
[INFO] [stdout]    |
[INFO] [stdout] 47 |             if regexp.char_at(i) == '(' || regexp.char_at(i) == '*' || regexp.char_at(i) == ')' {
[INFO] [stdout]    |                                                   ^^^^^^^ method not found in `&str`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `char_at` found for reference `&str` in the current scope
[INFO] [stdout]   --> src/strings/regular_expressions/mod.rs:47:79
[INFO] [stdout]    |
[INFO] [stdout] 47 |             if regexp.char_at(i) == '(' || regexp.char_at(i) == '*' || regexp.char_at(i) == ')' {
[INFO] [stdout]    |                                                                               ^^^^^^^ method not found in `&str`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `char_at` found for reference `&str` in the current scope
[INFO] [stdout]   --> src/strings/regular_expressions/mod.rs:71:37
[INFO] [stdout]    |
[INFO] [stdout] 71 |                 if regexp[v] == txt.char_at(i) || regexp[v] == '.' {
[INFO] [stdout]    |                                     ^^^^^^^ method not found in `&str`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `char_at` found for reference `&str` in the current scope
[INFO] [stdout]   --> src/strings/tries/tst.rs:24:21
[INFO] [stdout]    |
[INFO] [stdout] 24 |         let c = key.char_at(d);
[INFO] [stdout]    |                     ^^^^^^^ method not found in `&str`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `char_at` found for reference `&str` in the current scope
[INFO] [stdout]   --> src/strings/tries/tst.rs:55:21
[INFO] [stdout]    |
[INFO] [stdout] 55 |         let c = key.char_at(d);
[INFO] [stdout]    |                     ^^^^^^^ method not found in `&str`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `char_at` found for reference `&str` in the current scope
[INFO] [stdout]   --> src/strings/tries/tst.rs:87:25
[INFO] [stdout]    |
[INFO] [stdout] 87 |         let c = pattern.char_at(i);
[INFO] [stdout]    |                         ^^^^^^^ method not found in `&str`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `char_at` found for reference `&'a str` in the current scope
[INFO] [stdout]    --> src/strings/tries/tst.rs:111:27
[INFO] [stdout]     |
[INFO] [stdout] 111 |             let c = query.char_at(i);
[INFO] [stdout]     |                           ^^^^^^^ method not found in `&'a str`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `char_at` found for reference `&str` in the current scope
[INFO] [stdout]    --> src/strings/radix_sort.rs:257:15
[INFO] [stdout]     |
[INFO] [stdout] 257 |             s.char_at(d) as isize
[INFO] [stdout]     |               ^^^^^^^ method not found in `&str`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `char_at` found for reference `&str` in the current scope
[INFO] [stdout]    --> src/context/suffix_arrays.rs:152:22
[INFO] [stdout]     |
[INFO] [stdout] 152 |             if query.char_at(j) != self.text[i] {
[INFO] [stdout]     |                      ^^^^^^^ method not found in `&str`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `char_at` found for reference `&str` in the current scope
[INFO] [stdout]    --> src/context/suffix_arrays.rs:153:30
[INFO] [stdout]     |
[INFO] [stdout] 153 |                 return query.char_at(j) as i32 - self.text[i] as i32;
[INFO] [stdout]     |                              ^^^^^^^ method not found in `&str`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::super::searching::ST`
[INFO] [stdout]  --> src/geometric_search/interval_search_tree.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use super::super::searching::ST;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 36 previous errors; 67 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0432, E0433, E0599.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0432`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `algs4`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "c05a3b70f09d57d9ca8f03bdfeb3ac1bcb34b9b3d24dc8f5fe1cd2dd2b0f78a7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c05a3b70f09d57d9ca8f03bdfeb3ac1bcb34b9b3d24dc8f5fe1cd2dd2b0f78a7", kill_on_drop: false }`
[INFO] [stdout] c05a3b70f09d57d9ca8f03bdfeb3ac1bcb34b9b3d24dc8f5fe1cd2dd2b0f78a7