[INFO] fetching crate malk-lexer 0.1.1...
[INFO] checking malk-lexer-0.1.1 against beta for pr-78714
[INFO] extracting crate malk-lexer 0.1.1 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate malk-lexer 0.1.1 on toolchain beta
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate malk-lexer 0.1.1
[INFO] finished tweaking crates.io crate malk-lexer 0.1.1
[INFO] tweaked toml for crates.io crate malk-lexer 0.1.1 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "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" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 282e8c3ef274f679a0375b86af1615d25b27af4bbb4dabae528baf282ce629f5
[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" "282e8c3ef274f679a0375b86af1615d25b27af4bbb4dabae528baf282ce629f5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "282e8c3ef274f679a0375b86af1615d25b27af4bbb4dabae528baf282ce629f5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "282e8c3ef274f679a0375b86af1615d25b27af4bbb4dabae528baf282ce629f5", kill_on_drop: false }`
[INFO] [stdout] 282e8c3ef274f679a0375b86af1615d25b27af4bbb4dabae528baf282ce629f5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "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" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d4b40f3d6d0a3256126f5b04fc1615653232593411c0cb0ae66368b832186d35
[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" "d4b40f3d6d0a3256126f5b04fc1615653232593411c0cb0ae66368b832186d35", kill_on_drop: false }`
[INFO] [stderr]     Checking unicode-xid v0.0.3
[INFO] [stderr]     Checking unicode-brackets v0.1.1
[INFO] [stderr]     Checking malk-lexer v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(pattern)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(unicode)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/symbol_table.rs:28:17
[INFO] [stdout]    |
[INFO] [stdout] 28 |                 try!(recurse(symbols, postfix_list, complete_list, new_postfix));
[INFO] [stdout]    |                 ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/symbol_table.rs:44:17
[INFO] [stdout]    |
[INFO] [stdout] 44 |                 try!(recurse(symbols,
[INFO] [stdout]    |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lex.rs:186:23
[INFO] [stdout]     |
[INFO] [stdout] 186 |             let sub = try!(sub_lex(p, src, symbols));
[INFO] [stdout]     |                       ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lex.rs:249:38
[INFO] [stdout]     |
[INFO] [stdout] 249 |                 let (new_c, new_p) = try!(next(p));
[INFO] [stdout]     |                                      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lex.rs:265:42
[INFO] [stdout]     |
[INFO] [stdout] 265 |                     let (esc_c, esc_p) = try!(next(new_p));
[INFO] [stdout]     |                                          ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lex.rs:275:52
[INFO] [stdout]     |
[INFO] [stdout] 275 | ...                   let (nib0, nib0_end) = try!(next(esc_p));
[INFO] [stdout]     |                                              ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lex.rs:276:52
[INFO] [stdout]     |
[INFO] [stdout] 276 | ...                   let (nib1, nib1_end) = try!(next(nib0_end));
[INFO] [stdout]     |                                              ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lex.rs:277:40
[INFO] [stdout]     |
[INFO] [stdout] 277 | ...                   let nib0 = try!(from_hex(nib0, esc_p));
[INFO] [stdout]     |                                  ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lex.rs:278:40
[INFO] [stdout]     |
[INFO] [stdout] 278 | ...                   let nib1 = try!(from_hex(nib1, nib0_end));
[INFO] [stdout]     |                                  ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lex.rs:279:30
[INFO] [stdout]     |
[INFO] [stdout] 279 | ...                   (try!(from_u32((nib0 << 4) | nib1, p)), nib1_end)
[INFO] [stdout]     |                        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lex.rs:282:52
[INFO] [stdout]     |
[INFO] [stdout] 282 | ...                   let (open_c, open_p) = try!(next(esc_p));
[INFO] [stdout]     |                                              ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lex.rs:293:54
[INFO] [stdout]     |
[INFO] [stdout] 293 | ...                   let (nib, nib_end) = try!(next(end));
[INFO] [stdout]     |                                            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lex.rs:299:43
[INFO] [stdout]     |
[INFO] [stdout] 299 | ...                   let nib = try!(from_hex(nib, end));
[INFO] [stdout]     |                                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lex.rs:304:58
[INFO] [stdout]     |
[INFO] [stdout] 304 | ...                   let (close_c, close_p) = try!(next(end));
[INFO] [stdout]     |                                                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lex.rs:312:30
[INFO] [stdout]     |
[INFO] [stdout] 312 | ...                   (try!(from_u32(code, p)), end)
[INFO] [stdout]     |                        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lex.rs:396:15
[INFO] [stdout]     |
[INFO] [stdout] 396 |     let sub = try!(sub_lex(pos, src, symbols));
[INFO] [stdout]     |               ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> src/lex.rs:231:20
[INFO] [stdout]     |
[INFO] [stdout] 231 |                 '0'...'9' => Ok(some_char as u32 - '0' as u32),
[INFO] [stdout]     |                    ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(ellipsis_inclusive_range_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> src/lex.rs:232:20
[INFO] [stdout]     |
[INFO] [stdout] 232 |                 'a'...'f' => Ok(some_char as u32 - 'a' as u32 + 10),
[INFO] [stdout]     |                    ^^^ help: use `..=` for an inclusive range
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(pattern)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(unicode)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/symbol_table.rs:28:17
[INFO] [stdout]    |
[INFO] [stdout] 28 |                 try!(recurse(symbols, postfix_list, complete_list, new_postfix));
[INFO] [stdout]    |                 ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/symbol_table.rs:44:17
[INFO] [stdout]    |
[INFO] [stdout] 44 |                 try!(recurse(symbols,
[INFO] [stdout]    |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lex.rs:186:23
[INFO] [stdout]     |
[INFO] [stdout] 186 |             let sub = try!(sub_lex(p, src, symbols));
[INFO] [stdout]     |                       ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lex.rs:249:38
[INFO] [stdout]     |
[INFO] [stdout] 249 |                 let (new_c, new_p) = try!(next(p));
[INFO] [stdout]     |                                      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lex.rs:265:42
[INFO] [stdout]     |
[INFO] [stdout] 265 |                     let (esc_c, esc_p) = try!(next(new_p));
[INFO] [stdout]     |                                          ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lex.rs:275:52
[INFO] [stdout]     |
[INFO] [stdout] 275 | ...                   let (nib0, nib0_end) = try!(next(esc_p));
[INFO] [stdout]     |                                              ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lex.rs:276:52
[INFO] [stdout]     |
[INFO] [stdout] 276 | ...                   let (nib1, nib1_end) = try!(next(nib0_end));
[INFO] [stdout]     |                                              ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lex.rs:277:40
[INFO] [stdout]     |
[INFO] [stdout] 277 | ...                   let nib0 = try!(from_hex(nib0, esc_p));
[INFO] [stdout]     |                                  ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lex.rs:278:40
[INFO] [stdout]     |
[INFO] [stdout] 278 | ...                   let nib1 = try!(from_hex(nib1, nib0_end));
[INFO] [stdout]     |                                  ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lex.rs:279:30
[INFO] [stdout]     |
[INFO] [stdout] 279 | ...                   (try!(from_u32((nib0 << 4) | nib1, p)), nib1_end)
[INFO] [stdout]     |                        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lex.rs:282:52
[INFO] [stdout]     |
[INFO] [stdout] 282 | ...                   let (open_c, open_p) = try!(next(esc_p));
[INFO] [stdout]     |                                              ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lex.rs:293:54
[INFO] [stdout]     |
[INFO] [stdout] 293 | ...                   let (nib, nib_end) = try!(next(end));
[INFO] [stdout]     |                                            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lex.rs:299:43
[INFO] [stdout]     |
[INFO] [stdout] 299 | ...                   let nib = try!(from_hex(nib, end));
[INFO] [stdout]     |                                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lex.rs:304:58
[INFO] [stdout]     |
[INFO] [stdout] 304 | ...                   let (close_c, close_p) = try!(next(end));
[INFO] [stdout]     |                                                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lex.rs:312:30
[INFO] [stdout]     |
[INFO] [stdout] 312 | ...                   (try!(from_u32(code, p)), end)
[INFO] [stdout]     |                        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lex.rs:396:15
[INFO] [stdout]     |
[INFO] [stdout] 396 |     let sub = try!(sub_lex(pos, src, symbols));
[INFO] [stdout]     |               ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> src/lex.rs:231:20
[INFO] [stdout]     |
[INFO] [stdout] 231 |                 '0'...'9' => Ok(some_char as u32 - '0' as u32),
[INFO] [stdout]     |                    ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(ellipsis_inclusive_range_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> src/lex.rs:232:20
[INFO] [stdout]     |
[INFO] [stdout] 232 |                 'a'...'f' => Ok(some_char as u32 - 'a' as u32 + 10),
[INFO] [stdout]     |                    ^^^ help: use `..=` for an inclusive range
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `is_xid_start` found for type `char` in the current scope
[INFO] [stdout]    --> src/lex.rs:163:14
[INFO] [stdout]     |
[INFO] [stdout] 163 |         if c.is_xid_start() {
[INFO] [stdout]     |              ^^^^^^^^^^^^ method not found in `char`
[INFO] [stdout]     |
[INFO] [stdout]     = help: items from traits can only be used if the trait is in scope
[INFO] [stdout]     = note: the following trait is implemented but not in scope; perhaps add a `use` for it:
[INFO] [stdout]             `use unicode_xid::UnicodeXID;`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `is_xid_continue` found for type `char` in the current scope
[INFO] [stdout]    --> src/lex.rs:170:23
[INFO] [stdout]     |
[INFO] [stdout] 170 |                 if !c.is_xid_continue() {
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^ method not found in `char`
[INFO] [stdout]     |
[INFO] [stdout]     = help: items from traits can only be used if the trait is in scope
[INFO] [stdout]     = note: the following trait is implemented but not in scope; perhaps add a `use` for it:
[INFO] [stdout]             `use unicode_xid::UnicodeXID;`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `is_xid_start` found for type `char` in the current scope
[INFO] [stdout]    --> src/lex.rs:370:26
[INFO] [stdout]     |
[INFO] [stdout] 370 |                        c.is_xid_start() ||
[INFO] [stdout]     |                          ^^^^^^^^^^^^ method not found in `char`
[INFO] [stdout]     |
[INFO] [stdout]     = help: items from traits can only be used if the trait is in scope
[INFO] [stdout]     = note: the following trait is implemented but not in scope; perhaps add a `use` for it:
[INFO] [stdout]             `use unicode_xid::UnicodeXID;`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 5 previous errors; 18 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0554, E0599.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `malk-lexer`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error[E0599]: no method named `is_xid_start` found for type `char` in the current scope
[INFO] [stdout]    --> src/lex.rs:163:14
[INFO] [stdout]     |
[INFO] [stdout] 163 |         if c.is_xid_start() {
[INFO] [stdout]     |              ^^^^^^^^^^^^ method not found in `char`
[INFO] [stdout]     |
[INFO] [stdout]     = help: items from traits can only be used if the trait is in scope
[INFO] [stdout]     = note: the following trait is implemented but not in scope; perhaps add a `use` for it:
[INFO] [stdout]             `use unicode_xid::UnicodeXID;`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `is_xid_continue` found for type `char` in the current scope
[INFO] [stdout]    --> src/lex.rs:170:23
[INFO] [stdout]     |
[INFO] [stdout] 170 |                 if !c.is_xid_continue() {
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^ method not found in `char`
[INFO] [stdout]     |
[INFO] [stdout]     = help: items from traits can only be used if the trait is in scope
[INFO] [stdout]     = note: the following trait is implemented but not in scope; perhaps add a `use` for it:
[INFO] [stdout]             `use unicode_xid::UnicodeXID;`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `is_xid_start` found for type `char` in the current scope
[INFO] [stdout]    --> src/lex.rs:370:26
[INFO] [stdout]     |
[INFO] [stdout] 370 |                        c.is_xid_start() ||
[INFO] [stdout]     |                          ^^^^^^^^^^^^ method not found in `char`
[INFO] [stdout]     |
[INFO] [stdout]     = help: items from traits can only be used if the trait is in scope
[INFO] [stdout]     = note: the following trait is implemented but not in scope; perhaps add a `use` for it:
[INFO] [stdout]             `use unicode_xid::UnicodeXID;`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 5 previous errors; 18 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0554, E0599.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "d4b40f3d6d0a3256126f5b04fc1615653232593411c0cb0ae66368b832186d35", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d4b40f3d6d0a3256126f5b04fc1615653232593411c0cb0ae66368b832186d35", kill_on_drop: false }`
[INFO] [stdout] d4b40f3d6d0a3256126f5b04fc1615653232593411c0cb0ae66368b832186d35