[INFO] updating cached repository https://github.com/Charles-Johnson/zia
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 27df02008cf064f8857b5c6e646519f306307ea9
[INFO] checking Charles-Johnson/zia against try#e4dba30b9b475d8750370c4dfb49b6541990904d for pr-71393
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCharles-Johnson%2Fzia" "/workspace/builds/worker-10/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-10/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Charles-Johnson/zia on toolchain e4dba30b9b475d8750370c4dfb49b6541990904d
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/Charles-Johnson/zia
[INFO] finished tweaking git repo https://github.com/Charles-Johnson/zia
[INFO] tweaked toml for git repo https://github.com/Charles-Johnson/zia written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "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-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "/opt/rustwide/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 91806704649ada4e3497176faddff5f7686a59c0484e50b92f65a4b53107d05c
[INFO] running `"docker" "start" "-a" "91806704649ada4e3497176faddff5f7686a59c0484e50b92f65a4b53107d05c"`
[INFO] [stderr]     Checking zia v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/adding.rs:50:13
[INFO] [stderr]    |
[INFO] [stderr] 50 |             try!(self.try_removing_reduction::<Self::S>(syntax));
[INFO] [stderr]    |             ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/adding.rs:53:34
[INFO] [stderr]    |
[INFO] [stderr] 53 |             let syntax_concept = try!(self.concept_from_ast(syntax));
[INFO] [stderr]    |                                  ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/adding.rs:54:39
[INFO] [stderr]    |
[INFO] [stderr] 54 |             let normal_form_concept = try!(self.concept_from_ast(normal_form));
[INFO] [stderr]    |                                       ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/adding.rs:55:13
[INFO] [stderr]    |
[INFO] [stderr] 55 |             try!(self.update_reduction(syntax_concept, normal_form_concept));
[INFO] [stderr]    |             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/adding.rs:120:37
[INFO] [stderr]     |
[INFO] [stderr] 120 |                     let mut leftc = try!(self.concept_from_ast(left));
[INFO] [stderr]     |                                     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/adding.rs:121:38
[INFO] [stderr]     |
[INFO] [stderr] 121 |                     let mut rightc = try!(self.concept_from_ast(right));
[INFO] [stderr]     |                                      ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/adding.rs:122:35
[INFO] [stderr]     |
[INFO] [stderr] 122 |                     let concept = try!(self.find_or_insert_definition(leftc, rightc));
[INFO] [stderr]     |                                   ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/adding.rs:124:25
[INFO] [stderr]     |
[INFO] [stderr] 124 |                         try!(self.label(concept, string));
[INFO] [stderr]     |                         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/adding.rs:191:26
[INFO] [stderr]     |
[INFO] [stderr] 191 |         let definition = try!(self.find_or_insert_definition(LABEL, concept));
[INFO] [stderr]     |                          ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/adding.rs:197:9
[INFO] [stderr]     |
[INFO] [stderr] 197 |         try!(self.label(new_default, string));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/adding.rs:205:3
[INFO] [stderr]     |
[INFO] [stderr] 205 |         try!(self.label(label_concept, "label_of"));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/adding.rs:206:9
[INFO] [stderr]     |
[INFO] [stderr] 206 |         try!(self.label(define_concept, ":="));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/adding.rs:207:9
[INFO] [stderr]     |
[INFO] [stderr] 207 |         try!(self.label(reduction_concept, "->"));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/adding.rs:228:17
[INFO] [stderr]     |
[INFO] [stderr] 228 |                 try!(self.insert_definition(definition, lefthand, righthand));
[INFO] [stderr]     |                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/removing.rs:43:17
[INFO] [stderr]    |
[INFO] [stderr] 43 |                 try!(self.try_delete_concept(concept));
[INFO] [stderr]    |                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/removing.rs:44:17
[INFO] [stderr]    |
[INFO] [stderr] 44 |                 try!(self.try_delete_concept(left));
[INFO] [stderr]    |                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/removing.rs:51:13
[INFO] [stderr]    |
[INFO] [stderr] 51 |             try!(self.unlabel(concept));
[INFO] [stderr]    |             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/translating.rs:49:24
[INFO] [stderr]    |
[INFO] [stderr] 49 |         let lefthand = try!(self.ast_from_token(left));
[INFO] [stderr]    |                        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/translating.rs:50:25
[INFO] [stderr]    |
[INFO] [stderr] 50 |         let righthand = try!(self.ast_from_token(right));
[INFO] [stderr]    |                         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/writing.rs:110:17
[INFO] [stderr]     |
[INFO] [stderr] 110 |         let r = try!(self.get_reduction_of_composition(concept));
[INFO] [stderr]     |                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/writing.rs:116:9
[INFO] [stderr]     |
[INFO] [stderr] 116 |         try!(self.write_concept(concept).make_reduce_to(reduction));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/writing.rs:125:17
[INFO] [stderr]     |
[INFO] [stderr] 125 |                 try!(self.get_reduction_of_composition(left))
[INFO] [stderr]     |                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/writing.rs:130:17
[INFO] [stderr]     |
[INFO] [stderr] 130 |                 try!(self.get_reduction_of_composition(right))
[INFO] [stderr]     |                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/writing.rs:163:13
[INFO] [stderr]     |
[INFO] [stderr] 163 |             try!(self.check_reductions(definition, lefthand));
[INFO] [stderr]     |             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/writing.rs:164:13
[INFO] [stderr]     |
[INFO] [stderr] 164 |             try!(self.check_reductions(definition, righthand));
[INFO] [stderr]     |             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/writing.rs:165:13
[INFO] [stderr]     |
[INFO] [stderr] 165 |             try!(self
[INFO] [stderr]     |             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:346:13
[INFO] [stderr]     |
[INFO] [stderr] 346 |             try!(self.define(new, old));
[INFO] [stderr]     |             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:366:21
[INFO] [stderr]     |
[INFO] [stderr] 366 |                     try!(self.define_new_syntax(new.to_string(), left, right));
[INFO] [stderr]     |                     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:390:13
[INFO] [stderr]     |
[INFO] [stderr] 390 |             try!(self.relabel(left_concept, &left.to_string()));
[INFO] [stderr]     |             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:393:32
[INFO] [stderr]     |
[INFO] [stderr] 393 |             let left_concept = try!(self.concept_from_ast(left));
[INFO] [stderr]     |                                ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:394:33
[INFO] [stderr]     |
[INFO] [stderr] 394 |             let right_concept = try!(self.concept_from_ast(right));
[INFO] [stderr]     |                                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:395:13
[INFO] [stderr]     |
[INFO] [stderr] 395 |             try!(self.insert_definition(concept, left_concept, right_concept));
[INFO] [stderr]     |             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:401:9
[INFO] [stderr]     |
[INFO] [stderr] 401 |         try!(self.unlabel(concept));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/adding.rs:50:13
[INFO] [stderr]    |
[INFO] [stderr] 50 |             try!(self.try_removing_reduction::<Self::S>(syntax));
[INFO] [stderr]    |             ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/adding.rs:53:34
[INFO] [stderr]    |
[INFO] [stderr] 53 |             let syntax_concept = try!(self.concept_from_ast(syntax));
[INFO] [stderr]    |                                  ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/adding.rs:54:39
[INFO] [stderr]    |
[INFO] [stderr] 54 |             let normal_form_concept = try!(self.concept_from_ast(normal_form));
[INFO] [stderr]    |                                       ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/adding.rs:55:13
[INFO] [stderr]    |
[INFO] [stderr] 55 |             try!(self.update_reduction(syntax_concept, normal_form_concept));
[INFO] [stderr]    |             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/adding.rs:120:37
[INFO] [stderr]     |
[INFO] [stderr] 120 |                     let mut leftc = try!(self.concept_from_ast(left));
[INFO] [stderr]     |                                     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/adding.rs:121:38
[INFO] [stderr]     |
[INFO] [stderr] 121 |                     let mut rightc = try!(self.concept_from_ast(right));
[INFO] [stderr]     |                                      ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/adding.rs:122:35
[INFO] [stderr]     |
[INFO] [stderr] 122 |                     let concept = try!(self.find_or_insert_definition(leftc, rightc));
[INFO] [stderr]     |                                   ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/adding.rs:124:25
[INFO] [stderr]     |
[INFO] [stderr] 124 |                         try!(self.label(concept, string));
[INFO] [stderr]     |                         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/adding.rs:191:26
[INFO] [stderr]     |
[INFO] [stderr] 191 |         let definition = try!(self.find_or_insert_definition(LABEL, concept));
[INFO] [stderr]     |                          ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/adding.rs:197:9
[INFO] [stderr]     |
[INFO] [stderr] 197 |         try!(self.label(new_default, string));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/adding.rs:205:3
[INFO] [stderr]     |
[INFO] [stderr] 205 |         try!(self.label(label_concept, "label_of"));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/adding.rs:206:9
[INFO] [stderr]     |
[INFO] [stderr] 206 |         try!(self.label(define_concept, ":="));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/adding.rs:207:9
[INFO] [stderr]     |
[INFO] [stderr] 207 |         try!(self.label(reduction_concept, "->"));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/adding.rs:228:17
[INFO] [stderr]     |
[INFO] [stderr] 228 |                 try!(self.insert_definition(definition, lefthand, righthand));
[INFO] [stderr]     |                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/removing.rs:43:17
[INFO] [stderr]    |
[INFO] [stderr] 43 |                 try!(self.try_delete_concept(concept));
[INFO] [stderr]    |                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/removing.rs:44:17
[INFO] [stderr]    |
[INFO] [stderr] 44 |                 try!(self.try_delete_concept(left));
[INFO] [stderr]    |                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/removing.rs:51:13
[INFO] [stderr]    |
[INFO] [stderr] 51 |             try!(self.unlabel(concept));
[INFO] [stderr]    |             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/translating.rs:49:24
[INFO] [stderr]    |
[INFO] [stderr] 49 |         let lefthand = try!(self.ast_from_token(left));
[INFO] [stderr]    |                        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/translating.rs:50:25
[INFO] [stderr]    |
[INFO] [stderr] 50 |         let righthand = try!(self.ast_from_token(right));
[INFO] [stderr]    |                         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/writing.rs:110:17
[INFO] [stderr]     |
[INFO] [stderr] 110 |         let r = try!(self.get_reduction_of_composition(concept));
[INFO] [stderr]     |                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/writing.rs:116:9
[INFO] [stderr]     |
[INFO] [stderr] 116 |         try!(self.write_concept(concept).make_reduce_to(reduction));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/writing.rs:125:17
[INFO] [stderr]     |
[INFO] [stderr] 125 |                 try!(self.get_reduction_of_composition(left))
[INFO] [stderr]     |                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/writing.rs:130:17
[INFO] [stderr]     |
[INFO] [stderr] 130 |                 try!(self.get_reduction_of_composition(right))
[INFO] [stderr]     |                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/writing.rs:163:13
[INFO] [stderr]     |
[INFO] [stderr] 163 |             try!(self.check_reductions(definition, lefthand));
[INFO] [stderr]     |             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/writing.rs:164:13
[INFO] [stderr]     |
[INFO] [stderr] 164 |             try!(self.check_reductions(definition, righthand));
[INFO] [stderr]     |             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/writing.rs:165:13
[INFO] [stderr]     |
[INFO] [stderr] 165 |             try!(self
[INFO] [stderr]     |             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:346:13
[INFO] [stderr]     |
[INFO] [stderr] 346 |             try!(self.define(new, old));
[INFO] [stderr]     |             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:366:21
[INFO] [stderr]     |
[INFO] [stderr] 366 |                     try!(self.define_new_syntax(new.to_string(), left, right));
[INFO] [stderr]     |                     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:390:13
[INFO] [stderr]     |
[INFO] [stderr] 390 |             try!(self.relabel(left_concept, &left.to_string()));
[INFO] [stderr]     |             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:393:32
[INFO] [stderr]     |
[INFO] [stderr] 393 |             let left_concept = try!(self.concept_from_ast(left));
[INFO] [stderr]     |                                ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:394:33
[INFO] [stderr]     |
[INFO] [stderr] 394 |             let right_concept = try!(self.concept_from_ast(right));
[INFO] [stderr]     |                                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:395:13
[INFO] [stderr]     |
[INFO] [stderr] 395 |             try!(self.insert_definition(concept, left_concept, right_concept));
[INFO] [stderr]     |             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:401:9
[INFO] [stderr]     |
[INFO] [stderr] 401 |         try!(self.unlabel(concept));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/adding.rs:120:25
[INFO] [stderr]     |
[INFO] [stderr] 120 |                     let mut leftc = try!(self.concept_from_ast(left));
[INFO] [stderr]     |                         ----^^^^^
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/adding.rs:121:25
[INFO] [stderr]     |
[INFO] [stderr] 121 |                     let mut rightc = try!(self.concept_from_ast(right));
[INFO] [stderr]     |                         ----^^^^^^
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/adding.rs:120:25
[INFO] [stderr]     |
[INFO] [stderr] 120 |                     let mut leftc = try!(self.concept_from_ast(left));
[INFO] [stderr]     |                         ----^^^^^
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/adding.rs:121:25
[INFO] [stderr]     |
[INFO] [stderr] 121 |                     let mut rightc = try!(self.concept_from_ast(right));
[INFO] [stderr]     |                         ----^^^^^^
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: 35 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: 35 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.48s
[INFO] running `"docker" "inspect" "91806704649ada4e3497176faddff5f7686a59c0484e50b92f65a4b53107d05c"`
[INFO] running `"docker" "rm" "-f" "91806704649ada4e3497176faddff5f7686a59c0484e50b92f65a4b53107d05c"`
[INFO] [stdout] 91806704649ada4e3497176faddff5f7686a59c0484e50b92f65a4b53107d05c