[INFO] updating cached repository https://github.com/mthom/rusty-wam
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/mnt/big/crater/work/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] [stderr] From https://github.com/mthom/rusty-wam
[INFO] [stderr]    9d2ac9e..3e3031b  master     -> master
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 3e3031bb9ddb56e24f220e93df864e746bdbe7a9
[INFO] checking mthom/rusty-wam against try#e689e5eaefe96e6dc3ed5bb629c521b7d207aff7 for pr-64398
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmthom%2Frusty-wam" "work/builds/worker-7/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mthom/rusty-wam on toolchain e689e5eaefe96e6dc3ed5bb629c521b7d207aff7-alt
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+e689e5eaefe96e6dc3ed5bb629c521b7d207aff7-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/mthom/rusty-wam
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[INFO] tweaked toml for git repo https://github.com/mthom/rusty-wam written to work/builds/worker-7/source/Cargo.toml
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+e689e5eaefe96e6dc3ed5bb629c521b7d207aff7-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+e689e5eaefe96e6dc3ed5bb629c521b7d207aff7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/mnt/big/crater/work/builds/worker-7/source:/opt/rustwide/workdir:ro,Z" "-v" "/mnt/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-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" "+e689e5eaefe96e6dc3ed5bb629c521b7d207aff7-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 76c9beae0dfaa29a422ea7ecbd76b381bed13675086504c46703776d07d313ad
[INFO] running `"docker" "start" "-a" "76c9beae0dfaa29a422ea7ecbd76b381bed13675086504c46703776d07d313ad"`
[INFO] [stderr]    Compiling rug v1.6.0
[INFO] [stderr]    Compiling readline_rs_compat v0.1.9
[INFO] [stderr]     Checking ref_thread_local v0.0.0
[INFO] [stderr]     Checking downcast v0.10.0
[INFO] [stderr]    Compiling dirs-sys v0.3.4
[INFO] [stderr]    Compiling dirs v2.0.2
[INFO] [stderr]    Compiling gmp-mpfr-sys v1.1.14
[INFO] [stderr]     Checking prolog_parser v0.8.27
[INFO] [stderr]     Checking scryer-prolog v0.8.89 (/opt/rustwide/workdir)
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/prolog/machine/toplevel.rs:714:39
[INFO] [stderr]     |
[INFO] [stderr] 714 |                     Ok(TopLevel::Fact(try!(self.setup_fact(term, true))))
[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/prolog/machine/toplevel.rs:716:39
[INFO] [stderr]     |
[INFO] [stderr] 716 |             term => Ok(TopLevel::Fact(try!(self.setup_fact(term, true))))
[INFO] [stderr]     |                                       ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/prolog/machine/compile.rs:179:20
[INFO] [stderr]     |
[INFO] [stderr] 179 |     let mut code = try!(cg.compile_query(&terms));
[INFO] [stderr]     |                    ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/prolog/codegen.rs:644:9
[INFO] [stderr]     |
[INFO] [stderr] 644 |         try!(self.compile_seq(iter, &conjunct_info, &mut code, false));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/prolog/codegen.rs:739:9
[INFO] [stderr]     |
[INFO] [stderr] 739 |         try!(self.compile_seq(iter, &conjunct_info, &mut code, true));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/prolog/codegen.rs:809:21
[INFO] [stderr]     |
[INFO] [stderr] 809 |                     try!(self.compile_rule(rule))
[INFO] [stderr]     |                     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/prolog/codegen.rs:844:36
[INFO] [stderr]     |
[INFO] [stderr] 844 |             let mut code_segment = try!(self.compile_pred_subseq(&clauses[l .. r]));
[INFO] [stderr]     |                                    ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/prolog/machine/machine_errors.rs:163:46
[INFO] [stderr]     |
[INFO] [stderr] 163 |     fn into_iter(self, offset: usize) -> Box<Iterator<Item=HeapCellValue>> {
[INFO] [stderr]     |                                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item=HeapCellValue>`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/prolog/machine/machine_state.rs:871:11
[INFO] [stderr]     |
[INFO] [stderr] 871 | downcast!(CallPolicy);
[INFO] [stderr]     |           ^^^^^^^^^^ help: use `dyn`: `dyn CallPolicy`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/prolog/machine/machine_state.rs:878:33
[INFO] [stderr]     |
[INFO] [stderr] 878 |     pub(crate) prev_policy: Box<CallPolicy>,
[INFO] [stderr]     |                                 ^^^^^^^^^^ help: use `dyn`: `dyn CallPolicy`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/prolog/machine/machine_state.rs:885:49
[INFO] [stderr]     |
[INFO] [stderr] 885 |     pub(crate) fn new_in_place(policy: &mut Box<CallPolicy>)
[INFO] [stderr]     |                                                 ^^^^^^^^^^ help: use `dyn`: `dyn CallPolicy`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/prolog/machine/machine_state.rs:887:34
[INFO] [stderr]     |
[INFO] [stderr] 887 |         let mut prev_policy: Box<CallPolicy> = Box::new(DefaultCallPolicy {});
[INFO] [stderr]     |                                  ^^^^^^^^^^ help: use `dyn`: `dyn CallPolicy`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/prolog/machine/machine_state.rs:940:48
[INFO] [stderr]     |
[INFO] [stderr] 940 |     pub(crate) fn into_inner(&mut self) -> Box<CallPolicy> {
[INFO] [stderr]     |                                                ^^^^^^^^^^ help: use `dyn`: `dyn CallPolicy`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/prolog/machine/machine_state.rs:941:32
[INFO] [stderr]     |
[INFO] [stderr] 941 |         let mut new_inner: Box<CallPolicy> = Box::new(DefaultCallPolicy {});
[INFO] [stderr]     |                                ^^^^^^^^^^ help: use `dyn`: `dyn CallPolicy`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/prolog/machine/machine_state.rs:952:11
[INFO] [stderr]     |
[INFO] [stderr] 952 | downcast!(CutPolicy);
[INFO] [stderr]     |           ^^^^^^^^^ help: use `dyn`: `dyn CutPolicy`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]     --> src/prolog/machine/machine_state_impl.rs:2978:49
[INFO] [stderr]      |
[INFO] [stderr] 2978 |                           call_policy: &mut Box<CallPolicy>,
[INFO] [stderr]      |                                                 ^^^^^^^^^^ help: use `dyn`: `dyn CallPolicy`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]     --> src/prolog/machine/machine_state_impl.rs:2979:49
[INFO] [stderr]      |
[INFO] [stderr] 2979 |                           cut_policy:  &mut Box<CutPolicy>,
[INFO] [stderr]      |                                                 ^^^^^^^^^ help: use `dyn`: `dyn CutPolicy`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]     --> src/prolog/machine/machine_state_impl.rs:2986:42
[INFO] [stderr]      |
[INFO] [stderr] 2986 |         let mut default_call_policy: Box<CallPolicy> = Box::new(DefaultCallPolicy {});
[INFO] [stderr]      |                                          ^^^^^^^^^^ help: use `dyn`: `dyn CallPolicy`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]     --> src/prolog/machine/machine_state_impl.rs:3019:60
[INFO] [stderr]      |
[INFO] [stderr] 3019 | ...                   call_policy: &mut Box<CallPolicy>,
[INFO] [stderr]      |                                             ^^^^^^^^^^ help: use `dyn`: `dyn CallPolicy`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]     --> src/prolog/machine/machine_state_impl.rs:3020:60
[INFO] [stderr]      |
[INFO] [stderr] 3020 | ...                   cut_policy:  &mut Box<CutPolicy>,
[INFO] [stderr]      |                                             ^^^^^^^^^ help: use `dyn`: `dyn CutPolicy`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]     --> src/prolog/machine/machine_state_impl.rs:3047:70
[INFO] [stderr]      |
[INFO] [stderr] 3047 | ...                   call_policy: &mut Box<CallPolicy>)
[INFO] [stderr]      |                                             ^^^^^^^^^^ help: use `dyn`: `dyn CallPolicy`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]     --> src/prolog/machine/machine_state_impl.rs:3084:62
[INFO] [stderr]      |
[INFO] [stderr] 3084 | ...                   call_policy: &mut Box<CallPolicy>)
[INFO] [stderr]      |                                             ^^^^^^^^^^ help: use `dyn`: `dyn CallPolicy`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]     --> src/prolog/machine/machine_state_impl.rs:3129:58
[INFO] [stderr]      |
[INFO] [stderr] 3129 | ...                   cut_policy: &mut Box<CutPolicy>)
[INFO] [stderr]      |                                            ^^^^^^^^^ help: use `dyn`: `dyn CutPolicy`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/prolog/machine/system_calls.rs:388:53
[INFO] [stderr]     |
[INFO] [stderr] 388 | ...                   call_policy: &mut Box<CallPolicy>,
[INFO] [stderr]     |                                             ^^^^^^^^^^ help: use `dyn`: `dyn CallPolicy`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/prolog/machine/system_calls.rs:389:53
[INFO] [stderr]     |
[INFO] [stderr] 389 | ...                   cut_policy:  &mut Box<CutPolicy>,
[INFO] [stderr]     |                                             ^^^^^^^^^ help: use `dyn`: `dyn CutPolicy`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/prolog/machine/mod.rs:50:22
[INFO] [stderr]    |
[INFO] [stderr] 50 |     call_policy: Box<CallPolicy>,
[INFO] [stderr]    |                      ^^^^^^^^^^ help: use `dyn`: `dyn CallPolicy`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/prolog/machine/mod.rs:51:21
[INFO] [stderr]    |
[INFO] [stderr] 51 |     cut_policy: Box<CutPolicy>,
[INFO] [stderr]    |                     ^^^^^^^^^ help: use `dyn`: `dyn CutPolicy`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/prolog/machine/mod.rs:70:49
[INFO] [stderr]    |
[INFO] [stderr] 70 |     pub(super) prolog_stream: ParsingStream<Box<Read>>
[INFO] [stderr]    |                                                 ^^^^ help: use `dyn`: `dyn Read`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/prolog/iterators.rs:297:15
[INFO] [stderr]     |
[INFO] [stderr] 297 |     iter: Box<Iterator<Item=ChunkedTerm<'a>> + 'a>,
[INFO] [stderr]     |               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item=ChunkedTerm<'a>> + 'a`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/prolog/iterators.rs:307:40
[INFO] [stderr]     |
[INFO] [stderr] 307 |     pub fn rule_body_iter(self) -> Box<Iterator<Item=RuleBodyIteratorItem<'a>> + 'a>
[INFO] [stderr]     |                                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item=RuleBodyIteratorItem<'a>> + 'a`
[INFO] [stderr] 
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]    --> src/prolog/heap_print.rs:152:16
[INFO] [stderr]     |
[INFO] [stderr] 152 |         '\x20' ... '\x7e' => c.to_string(),
[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: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/prolog/read.rs:26:43
[INFO] [stderr]    |
[INFO] [stderr] 26 | pub type PrologStream = ParsingStream<Box<Read>>;
[INFO] [stderr]    |                                           ^^^^ help: use `dyn`: `dyn Read`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/prolog/read.rs:141:25
[INFO] [stderr]     |
[INFO] [stderr] 141 |         let reader: Box<Read> = Box::new(ReadlineStream::new(String::from("")));
[INFO] [stderr]     |                         ^^^^ help: use `dyn`: `dyn Read`
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/prolog/machine/toplevel.rs:714:39
[INFO] [stderr]     |
[INFO] [stderr] 714 |                     Ok(TopLevel::Fact(try!(self.setup_fact(term, true))))
[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/prolog/machine/toplevel.rs:716:39
[INFO] [stderr]     |
[INFO] [stderr] 716 |             term => Ok(TopLevel::Fact(try!(self.setup_fact(term, true))))
[INFO] [stderr]     |                                       ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/prolog/machine/compile.rs:179:20
[INFO] [stderr]     |
[INFO] [stderr] 179 |     let mut code = try!(cg.compile_query(&terms));
[INFO] [stderr]     |                    ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/prolog/codegen.rs:644:9
[INFO] [stderr]     |
[INFO] [stderr] 644 |         try!(self.compile_seq(iter, &conjunct_info, &mut code, false));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/prolog/codegen.rs:739:9
[INFO] [stderr]     |
[INFO] [stderr] 739 |         try!(self.compile_seq(iter, &conjunct_info, &mut code, true));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/prolog/codegen.rs:809:21
[INFO] [stderr]     |
[INFO] [stderr] 809 |                     try!(self.compile_rule(rule))
[INFO] [stderr]     |                     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/prolog/codegen.rs:844:36
[INFO] [stderr]     |
[INFO] [stderr] 844 |             let mut code_segment = try!(self.compile_pred_subseq(&clauses[l .. r]));
[INFO] [stderr]     |                                    ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/prolog/machine/machine_errors.rs:163:46
[INFO] [stderr]     |
[INFO] [stderr] 163 |     fn into_iter(self, offset: usize) -> Box<Iterator<Item=HeapCellValue>> {
[INFO] [stderr]     |                                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item=HeapCellValue>`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/prolog/machine/machine_state.rs:871:11
[INFO] [stderr]     |
[INFO] [stderr] 871 | downcast!(CallPolicy);
[INFO] [stderr]     |           ^^^^^^^^^^ help: use `dyn`: `dyn CallPolicy`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/prolog/machine/machine_state.rs:878:33
[INFO] [stderr]     |
[INFO] [stderr] 878 |     pub(crate) prev_policy: Box<CallPolicy>,
[INFO] [stderr]     |                                 ^^^^^^^^^^ help: use `dyn`: `dyn CallPolicy`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/prolog/machine/machine_state.rs:885:49
[INFO] [stderr]     |
[INFO] [stderr] 885 |     pub(crate) fn new_in_place(policy: &mut Box<CallPolicy>)
[INFO] [stderr]     |                                                 ^^^^^^^^^^ help: use `dyn`: `dyn CallPolicy`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/prolog/machine/machine_state.rs:887:34
[INFO] [stderr]     |
[INFO] [stderr] 887 |         let mut prev_policy: Box<CallPolicy> = Box::new(DefaultCallPolicy {});
[INFO] [stderr]     |                                  ^^^^^^^^^^ help: use `dyn`: `dyn CallPolicy`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/prolog/machine/machine_state.rs:940:48
[INFO] [stderr]     |
[INFO] [stderr] 940 |     pub(crate) fn into_inner(&mut self) -> Box<CallPolicy> {
[INFO] [stderr]     |                                                ^^^^^^^^^^ help: use `dyn`: `dyn CallPolicy`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/prolog/machine/machine_state.rs:941:32
[INFO] [stderr]     |
[INFO] [stderr] 941 |         let mut new_inner: Box<CallPolicy> = Box::new(DefaultCallPolicy {});
[INFO] [stderr]     |                                ^^^^^^^^^^ help: use `dyn`: `dyn CallPolicy`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/prolog/machine/machine_state.rs:952:11
[INFO] [stderr]     |
[INFO] [stderr] 952 | downcast!(CutPolicy);
[INFO] [stderr]     |           ^^^^^^^^^ help: use `dyn`: `dyn CutPolicy`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]     --> src/prolog/machine/machine_state_impl.rs:2978:49
[INFO] [stderr]      |
[INFO] [stderr] 2978 |                           call_policy: &mut Box<CallPolicy>,
[INFO] [stderr]      |                                                 ^^^^^^^^^^ help: use `dyn`: `dyn CallPolicy`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]     --> src/prolog/machine/machine_state_impl.rs:2979:49
[INFO] [stderr]      |
[INFO] [stderr] 2979 |                           cut_policy:  &mut Box<CutPolicy>,
[INFO] [stderr]      |                                                 ^^^^^^^^^ help: use `dyn`: `dyn CutPolicy`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]     --> src/prolog/machine/machine_state_impl.rs:2986:42
[INFO] [stderr]      |
[INFO] [stderr] 2986 |         let mut default_call_policy: Box<CallPolicy> = Box::new(DefaultCallPolicy {});
[INFO] [stderr]      |                                          ^^^^^^^^^^ help: use `dyn`: `dyn CallPolicy`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]     --> src/prolog/machine/machine_state_impl.rs:3019:60
[INFO] [stderr]      |
[INFO] [stderr] 3019 | ...                   call_policy: &mut Box<CallPolicy>,
[INFO] [stderr]      |                                             ^^^^^^^^^^ help: use `dyn`: `dyn CallPolicy`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]     --> src/prolog/machine/machine_state_impl.rs:3020:60
[INFO] [stderr]      |
[INFO] [stderr] 3020 | ...                   cut_policy:  &mut Box<CutPolicy>,
[INFO] [stderr]      |                                             ^^^^^^^^^ help: use `dyn`: `dyn CutPolicy`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]     --> src/prolog/machine/machine_state_impl.rs:3047:70
[INFO] [stderr]      |
[INFO] [stderr] 3047 | ...                   call_policy: &mut Box<CallPolicy>)
[INFO] [stderr]      |                                             ^^^^^^^^^^ help: use `dyn`: `dyn CallPolicy`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]     --> src/prolog/machine/machine_state_impl.rs:3084:62
[INFO] [stderr]      |
[INFO] [stderr] 3084 | ...                   call_policy: &mut Box<CallPolicy>)
[INFO] [stderr]      |                                             ^^^^^^^^^^ help: use `dyn`: `dyn CallPolicy`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]     --> src/prolog/machine/machine_state_impl.rs:3129:58
[INFO] [stderr]      |
[INFO] [stderr] 3129 | ...                   cut_policy: &mut Box<CutPolicy>)
[INFO] [stderr]      |                                            ^^^^^^^^^ help: use `dyn`: `dyn CutPolicy`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/prolog/machine/system_calls.rs:388:53
[INFO] [stderr]     |
[INFO] [stderr] 388 | ...                   call_policy: &mut Box<CallPolicy>,
[INFO] [stderr]     |                                             ^^^^^^^^^^ help: use `dyn`: `dyn CallPolicy`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/prolog/machine/system_calls.rs:389:53
[INFO] [stderr]     |
[INFO] [stderr] 389 | ...                   cut_policy:  &mut Box<CutPolicy>,
[INFO] [stderr]     |                                             ^^^^^^^^^ help: use `dyn`: `dyn CutPolicy`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/prolog/machine/mod.rs:50:22
[INFO] [stderr]    |
[INFO] [stderr] 50 |     call_policy: Box<CallPolicy>,
[INFO] [stderr]    |                      ^^^^^^^^^^ help: use `dyn`: `dyn CallPolicy`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/prolog/machine/mod.rs:51:21
[INFO] [stderr]    |
[INFO] [stderr] 51 |     cut_policy: Box<CutPolicy>,
[INFO] [stderr]    |                     ^^^^^^^^^ help: use `dyn`: `dyn CutPolicy`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/prolog/machine/mod.rs:70:49
[INFO] [stderr]    |
[INFO] [stderr] 70 |     pub(super) prolog_stream: ParsingStream<Box<Read>>
[INFO] [stderr]    |                                                 ^^^^ help: use `dyn`: `dyn Read`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/prolog/iterators.rs:297:15
[INFO] [stderr]     |
[INFO] [stderr] 297 |     iter: Box<Iterator<Item=ChunkedTerm<'a>> + 'a>,
[INFO] [stderr]     |               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item=ChunkedTerm<'a>> + 'a`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/prolog/iterators.rs:307:40
[INFO] [stderr]     |
[INFO] [stderr] 307 |     pub fn rule_body_iter(self) -> Box<Iterator<Item=RuleBodyIteratorItem<'a>> + 'a>
[INFO] [stderr]     |                                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item=RuleBodyIteratorItem<'a>> + 'a`
[INFO] [stderr] 
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]    --> src/prolog/heap_print.rs:152:16
[INFO] [stderr]     |
[INFO] [stderr] 152 |         '\x20' ... '\x7e' => c.to_string(),
[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: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/prolog/read.rs:26:43
[INFO] [stderr]    |
[INFO] [stderr] 26 | pub type PrologStream = ParsingStream<Box<Read>>;
[INFO] [stderr]    |                                           ^^^^ help: use `dyn`: `dyn Read`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/prolog/read.rs:141:25
[INFO] [stderr]     |
[INFO] [stderr] 141 |         let reader: Box<Read> = Box::new(ReadlineStream::new(String::from("")));
[INFO] [stderr]     |                         ^^^^ help: use `dyn`: `dyn Read`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/prolog/machine/machine_errors.rs:66:21
[INFO] [stderr]    |
[INFO] [stderr] 66 |                 let mut stub = functor!("existence_error", 2, [heap_atom!("module"), name]);
[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/prolog/machine/machine_errors.rs:66:21
[INFO] [stderr]    |
[INFO] [stderr] 66 |                 let mut stub = functor!("existence_error", 2, [heap_atom!("module"), name]);
[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]     Finished dev [unoptimized + debuginfo] target(s) in 4m 18s
[INFO] running `"docker" "inspect" "76c9beae0dfaa29a422ea7ecbd76b381bed13675086504c46703776d07d313ad"`
[INFO] running `"docker" "rm" "-f" "76c9beae0dfaa29a422ea7ecbd76b381bed13675086504c46703776d07d313ad"`
[INFO] [stdout] 76c9beae0dfaa29a422ea7ecbd76b381bed13675086504c46703776d07d313ad