[INFO] crate mech-core 0.0.1 is already in cache
[INFO] extracting crate mech-core 0.0.1 into work/ex/pr-60914/sources/master#39401465da4ce27aeeb2c2a26133ac35c63aa515/reg/mech-core/0.0.1
[INFO] extracting crate mech-core 0.0.1 into work/ex/pr-60914/sources/try#f45cc3094ee337acd688771b9234318046b0572d/reg/mech-core/0.0.1
[INFO] validating manifest of mech-core-0.0.1 on toolchain master#39401465da4ce27aeeb2c2a26133ac35c63aa515
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+39401465da4ce27aeeb2c2a26133ac35c63aa515-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of mech-core-0.0.1 on toolchain try#f45cc3094ee337acd688771b9234318046b0572d
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+f45cc3094ee337acd688771b9234318046b0572d-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing mech-core-0.0.1
[INFO] finished frobbing mech-core-0.0.1
[INFO] frobbed toml for mech-core-0.0.1 written to work/ex/pr-60914/sources/master#39401465da4ce27aeeb2c2a26133ac35c63aa515/reg/mech-core/0.0.1/Cargo.toml
[INFO] started frobbing mech-core-0.0.1
[INFO] finished frobbing mech-core-0.0.1
[INFO] frobbed toml for mech-core-0.0.1 written to work/ex/pr-60914/sources/try#f45cc3094ee337acd688771b9234318046b0572d/reg/mech-core/0.0.1/Cargo.toml
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+39401465da4ce27aeeb2c2a26133ac35c63aa515-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+f45cc3094ee337acd688771b9234318046b0572d-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+39401465da4ce27aeeb2c2a26133ac35c63aa515-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+f45cc3094ee337acd688771b9234318046b0572d-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] checking mech-core-0.0.1 against master#39401465da4ce27aeeb2c2a26133ac35c63aa515 for pr-60914
[INFO] running `"docker" "create" "-v" "/mnt/crater-raid/crater/work/local/target-dirs/pr-60914/worker-4/master#39401465da4ce27aeeb2c2a26133ac35c63aa515:/opt/crater/target:rw,Z" "-v" "/mnt/crater-raid/crater/work/ex/pr-60914/sources/master#39401465da4ce27aeeb2c2a26133ac35c63aa515/reg/mech-core/0.0.1:/opt/crater/workdir:ro,Z" "-v" "/mnt/crater-raid/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/crater-raid/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+39401465da4ce27aeeb2c2a26133ac35c63aa515-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 86330ca1aa7511e9b2aec937087081967bf1c0c9f3bce5dd30382266d0f015dc
[INFO] running `"docker" "start" "-a" "86330ca1aa7511e9b2aec937087081967bf1c0c9f3bce5dd30382266d0f015dc"`
[INFO] [stderr]    Compiling serde v1.0.91
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking mech-core v0.0.1 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `Entry`
[INFO] [stderr]   --> src/database.rs:10:36
[INFO] [stderr]    |
[INFO] [stderr] 10 | use hashbrown::hash_map::{HashMap, Entry};
[INFO] [stderr]    |                                    ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Quantity`, `ToQuantity`
[INFO] [stderr]  --> src/operations.rs:8:18
[INFO] [stderr]   |
[INFO] [stderr] 8 | use quantities::{Quantity, QuantityMath, ToQuantity};
[INFO] [stderr]   |                  ^^^^^^^^                ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Entry`
[INFO] [stderr]   --> src/database.rs:10:36
[INFO] [stderr]    |
[INFO] [stderr] 10 | use hashbrown::hash_map::{HashMap, Entry};
[INFO] [stderr]    |                                    ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Quantity`, `ToQuantity`
[INFO] [stderr]  --> src/operations.rs:8:18
[INFO] [stderr]   |
[INFO] [stderr] 8 | use quantities::{Quantity, QuantityMath, ToQuantity};
[INFO] [stderr]   |                  ^^^^^^^^                ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable expression
[INFO] [stderr]     --> src/runtime.rs:1119:46
[INFO] [stderr]      |
[INFO] [stderr] 1119 |                              _ => {continue; 0}, // This continues before the return
[INFO] [stderr]      |                                              ^
[INFO] [stderr]      |
[INFO] [stderr]      = note: #[warn(unreachable_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable expression
[INFO] [stderr]     --> src/runtime.rs:1127:46
[INFO] [stderr]      |
[INFO] [stderr] 1127 |                              _ => {continue; 0},
[INFO] [stderr]      |                                              ^
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable expression
[INFO] [stderr]     --> src/runtime.rs:1136:48
[INFO] [stderr]      |
[INFO] [stderr] 1136 |                                _ => {continue; 0},
[INFO] [stderr]      |                                                ^
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable expression
[INFO] [stderr]     --> src/runtime.rs:1145:48
[INFO] [stderr]      |
[INFO] [stderr] 1145 |                                _ => {continue; 0},
[INFO] [stderr]      |                                                ^
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable expression
[INFO] [stderr]     --> src/runtime.rs:1119:46
[INFO] [stderr]      |
[INFO] [stderr] 1119 |                              _ => {continue; 0}, // This continues before the return
[INFO] [stderr]      |                                              ^
[INFO] [stderr]      |
[INFO] [stderr]      = note: #[warn(unreachable_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable expression
[INFO] [stderr]     --> src/runtime.rs:1127:46
[INFO] [stderr]      |
[INFO] [stderr] 1127 |                              _ => {continue; 0},
[INFO] [stderr]      |                                              ^
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable expression
[INFO] [stderr]     --> src/runtime.rs:1136:48
[INFO] [stderr]      |
[INFO] [stderr] 1136 |                                _ => {continue; 0},
[INFO] [stderr]      |                                                ^
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable expression
[INFO] [stderr]     --> src/runtime.rs:1145:48
[INFO] [stderr]      |
[INFO] [stderr] 1145 |                                _ => {continue; 0},
[INFO] [stderr]      |                                                ^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `id`
[INFO] [stderr]   --> src/lib.rs:97:10
[INFO] [stderr]    |
[INFO] [stderr] 97 |     for (id, block) in self.runtime.blocks.iter() {
[INFO] [stderr]    |          ^^ help: consider prefixing with an underscore: `_id`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `constraint_text`
[INFO] [stderr]    --> src/lib.rs:103:12
[INFO] [stderr]     |
[INFO] [stderr] 103 |       for (constraint_text, constraints) in &block.constraints {
[INFO] [stderr]     |            ^^^^^^^^^^^^^^^ help: consider prefixing with an underscore: `_constraint_text`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `columns`
[INFO] [stderr]    --> src/lib.rs:188:38
[INFO] [stderr]     |
[INFO] [stderr] 188 |           Change::NewTable{id, rows, columns} => {
[INFO] [stderr]     |                                      ^^^^^^^ help: try ignoring the field: `columns: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `id`
[INFO] [stderr]    --> src/lib.rs:188:28
[INFO] [stderr]     |
[INFO] [stderr] 188 |           Change::NewTable{id, rows, columns} => {
[INFO] [stderr]     |                            ^^ help: try ignoring the field: `id: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `rows`
[INFO] [stderr]    --> src/lib.rs:188:32
[INFO] [stderr]     |
[INFO] [stderr] 188 |           Change::NewTable{id, rows, columns} => {
[INFO] [stderr]     |                                ^^^^ help: try ignoring the field: `rows: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]    --> src/lib.rs:202:9
[INFO] [stderr]     |
[INFO] [stderr] 202 |     for i in 0..steps {
[INFO] [stderr]     |         ^ help: consider prefixing with an underscore: `_i`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `column`
[INFO] [stderr]    --> src/database.rs:203:34
[INFO] [stderr]     |
[INFO] [stderr] 203 |       Change::Remove{table, row, column, value} => {
[INFO] [stderr]     |                                  ^^^^^^ help: try ignoring the field: `column: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `row`
[INFO] [stderr]    --> src/database.rs:203:29
[INFO] [stderr]     |
[INFO] [stderr] 203 |       Change::Remove{table, row, column, value} => {
[INFO] [stderr]     |                             ^^^ help: try ignoring the field: `row: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `table`
[INFO] [stderr]    --> src/database.rs:203:22
[INFO] [stderr]     |
[INFO] [stderr] 203 |       Change::Remove{table, row, column, value} => {
[INFO] [stderr]     |                      ^^^^^ help: try ignoring the field: `table: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `value`
[INFO] [stderr]    --> src/database.rs:203:42
[INFO] [stderr]     |
[INFO] [stderr] 203 |       Change::Remove{table, row, column, value} => {
[INFO] [stderr]     |                                          ^^^^^ help: try ignoring the field: `value: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `table`
[INFO] [stderr]   --> src/runtime.rs:65:11
[INFO] [stderr]    |
[INFO] [stderr] 65 |       let table = register.table;
[INFO] [stderr]    |           ^^^^^ help: consider prefixing with an underscore: `_table`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `column`
[INFO] [stderr]   --> src/runtime.rs:66:11
[INFO] [stderr]    |
[INFO] [stderr] 66 |       let column = register.column.clone();
[INFO] [stderr]    |           ^^^^^^ help: consider prefixing with an underscore: `_column`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `store`
[INFO] [stderr]   --> src/runtime.rs:58:54
[INFO] [stderr]    |
[INFO] [stderr] 58 |   pub fn register_block(&mut self, mut block: Block, store: &mut Interner) {
[INFO] [stderr]    |                                                      ^^^^^ help: consider prefixing with an underscore: `_store`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `table`
[INFO] [stderr]    --> src/runtime.rs:114:15
[INFO] [stderr]     |
[INFO] [stderr] 114 |           let table = register.table;
[INFO] [stderr]     |               ^^^^^ help: consider prefixing with an underscore: `_table`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `column`
[INFO] [stderr]    --> src/runtime.rs:115:15
[INFO] [stderr]     |
[INFO] [stderr] 115 |           let column = register.column.clone();
[INFO] [stderr]     |               ^^^^^^ help: consider prefixing with an underscore: `_column`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `constraint_text`
[INFO] [stderr]    --> src/runtime.rs:255:10
[INFO] [stderr]     |
[INFO] [stderr] 255 |     let (constraint_text, constraints) = constraint_tuple;
[INFO] [stderr]     |          ^^^^^^^^^^^^^^^ help: consider prefixing with an underscore: `_constraint_text`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `constraint_ix`
[INFO] [stderr]    --> src/runtime.rs:276:10
[INFO] [stderr]     |
[INFO] [stderr] 276 |     for (constraint_ix, constraint) in constraints.iter().enumerate() {
[INFO] [stderr]     |          ^^^^^^^^^^^^^ help: consider prefixing with an underscore: `_constraint_ix`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `from_table`
[INFO] [stderr]    --> src/runtime.rs:278:31
[INFO] [stderr]     |
[INFO] [stderr] 278 |         Constraint::CopyTable{from_table, to_table} => {
[INFO] [stderr]     |                               ^^^^^^^^^^ help: try ignoring the field: `from_table: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `from_table`
[INFO] [stderr]    --> src/runtime.rs:281:28
[INFO] [stderr]     |
[INFO] [stderr] 281 |         Constraint::Append{from_table, to_table} => {
[INFO] [stderr]     |                            ^^^^^^^^^^ help: try ignoring the field: `from_table: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `from_table`
[INFO] [stderr]    --> src/runtime.rs:290:35
[INFO] [stderr]     |
[INFO] [stderr] 290 |         Constraint::Insert{from: (from_table, ..), to: (to_table, ..)} => {
[INFO] [stderr]     |                                   ^^^^^^^^^^ help: consider prefixing with an underscore: `_from_table`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `indices`
[INFO] [stderr]    --> src/runtime.rs:299:33
[INFO] [stderr]     |
[INFO] [stderr] 299 |         Constraint::Scan{table, indices, output} => {
[INFO] [stderr]     |                                 ^^^^^^^ help: try ignoring the field: `indices: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `output`
[INFO] [stderr]    --> src/runtime.rs:299:42
[INFO] [stderr]     |
[INFO] [stderr] 299 |         Constraint::Scan{table, indices, output} => {
[INFO] [stderr]     |                                          ^^^^^^ help: try ignoring the field: `output: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `id`
[INFO] [stderr]    --> src/runtime.rs:334:29
[INFO] [stderr]     |
[INFO] [stderr] 334 |             TableId::Global(id) => (), // TODO Add global alias here
[INFO] [stderr]     |                             ^^ help: consider prefixing with an underscore: `_id`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `operation`
[INFO] [stderr]    --> src/runtime.rs:337:30
[INFO] [stderr]     |
[INFO] [stderr] 337 |         Constraint::Function{operation, parameters, output} => {
[INFO] [stderr]     |                              ^^^^^^^^^ help: try ignoring the field: `operation: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `output`
[INFO] [stderr]    --> src/runtime.rs:337:53
[INFO] [stderr]     |
[INFO] [stderr] 337 |         Constraint::Function{operation, parameters, output} => {
[INFO] [stderr]     |                                                     ^^^^^^ help: try ignoring the field: `output: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `rows`
[INFO] [stderr]    --> src/runtime.rs:338:23
[INFO] [stderr]     |
[INFO] [stderr] 338 |           for (table, rows, columns) in parameters {
[INFO] [stderr]     |                       ^^^^ help: consider prefixing with an underscore: `_rows`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `columns`
[INFO] [stderr]    --> src/runtime.rs:338:29
[INFO] [stderr]     |
[INFO] [stderr] 338 |           for (table, rows, columns) in parameters {
[INFO] [stderr]     |                             ^^^^^^^ help: consider prefixing with an underscore: `_columns`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `comparator`
[INFO] [stderr]    --> src/runtime.rs:347:28
[INFO] [stderr]     |
[INFO] [stderr] 347 |         Constraint::Filter{comparator, lhs, rhs, output} => {
[INFO] [stderr]     |                            ^^^^^^^^^^ help: try ignoring the field: `comparator: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `output`
[INFO] [stderr]    --> src/runtime.rs:347:50
[INFO] [stderr]     |
[INFO] [stderr] 347 |         Constraint::Filter{comparator, lhs, rhs, output} => {
[INFO] [stderr]     |                                                  ^^^^^^ help: try ignoring the field: `output: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `lhs_rows`
[INFO] [stderr]    --> src/runtime.rs:348:27
[INFO] [stderr]     |
[INFO] [stderr] 348 |           let (lhs_table, lhs_rows, lhs_columns) = lhs;
[INFO] [stderr]     |                           ^^^^^^^^ help: consider prefixing with an underscore: `_lhs_rows`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `rhs_rows`
[INFO] [stderr]    --> src/runtime.rs:349:27
[INFO] [stderr]     |
[INFO] [stderr] 349 |           let (rhs_table, rhs_rows, rhs_columns) = rhs;
[INFO] [stderr]     |                           ^^^^^^^^ help: consider prefixing with an underscore: `_rhs_rows`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `v`
[INFO] [stderr]    --> src/runtime.rs:387:27
[INFO] [stderr]     |
[INFO] [stderr] 387 |             Entry::Vacant(v) => {    
[INFO] [stderr]     |                           ^ help: consider prefixing with an underscore: `_v`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `v`
[INFO] [stderr]    --> src/runtime.rs:402:27
[INFO] [stderr]     |
[INFO] [stderr] 402 |             Entry::Vacant(v) => {    
[INFO] [stderr]     |                           ^ help: consider prefixing with an underscore: `_v`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `v`
[INFO] [stderr]    --> src/runtime.rs:413:27
[INFO] [stderr]     |
[INFO] [stderr] 413 |             Entry::Vacant(v) => {    
[INFO] [stderr]     |                           ^ help: consider prefixing with an underscore: `_v`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `v`
[INFO] [stderr]    --> src/runtime.rs:427:27
[INFO] [stderr]     |
[INFO] [stderr] 427 |             Entry::Vacant(v) => {    
[INFO] [stderr]     |                           ^ help: consider prefixing with an underscore: `_v`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `start_row`
[INFO] [stderr]    --> src/runtime.rs:643:21
[INFO] [stderr]     |
[INFO] [stderr] 643 |                 let start_row: usize = 0;
[INFO] [stderr]     |                     ^^^^^^^^^ help: consider prefixing with an underscore: `_start_row`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `rows`
[INFO] [stderr]    --> src/runtime.rs:666:25
[INFO] [stderr]     |
[INFO] [stderr] 666 |             for (table, rows, columns) in parameters {
[INFO] [stderr]     |                         ^^^^ help: consider prefixing with an underscore: `_rows`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `columns`
[INFO] [stderr]    --> src/runtime.rs:666:31
[INFO] [stderr]     |
[INFO] [stderr] 666 |             for (table, rows, columns) in parameters {
[INFO] [stderr]     |                               ^^^^^^^ help: consider prefixing with an underscore: `_columns`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `to_is_scalar`
[INFO] [stderr]     --> src/runtime.rs:1072:15
[INFO] [stderr]      |
[INFO] [stderr] 1072 |           let to_is_scalar = to_width == 1 && to_height == 1;
[INFO] [stderr]      |               ^^^^^^^^^^^^ help: consider prefixing with an underscore: `_to_is_scalar`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `column`
[INFO] [stderr]     --> src/runtime.rs:1307:40
[INFO] [stderr]      |
[INFO] [stderr] 1307 |       Constraint::Constant{table, row, column, value} => write!(f, "Constant({} -> #{:?})", value.to_float(), table),
[INFO] [stderr]      |                                        ^^^^^^ help: try ignoring the field: `column: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `row`
[INFO] [stderr]     --> src/runtime.rs:1307:35
[INFO] [stderr]      |
[INFO] [stderr] 1307 |       Constraint::Constant{table, row, column, value} => write!(f, "Constant({} -> #{:?})", value.to_float(), table),
[INFO] [stderr]      |                                   ^^^ help: try ignoring the field: `row: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `column`
[INFO] [stderr]     --> src/runtime.rs:1308:38
[INFO] [stderr]      |
[INFO] [stderr] 1308 |       Constraint::String{table, row, column, value} => write!(f, "String({:?} -> #{:?})", value, table),
[INFO] [stderr]      |                                      ^^^^^^ help: try ignoring the field: `column: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `row`
[INFO] [stderr]     --> src/runtime.rs:1308:33
[INFO] [stderr]      |
[INFO] [stderr] 1308 |       Constraint::String{table, row, column, value} => write!(f, "String({:?} -> #{:?})", value, table),
[INFO] [stderr]      |                                 ^^^ help: try ignoring the field: `row: _`
[INFO] [stderr] 
[INFO] [stderr] error[E0502]: cannot borrow `self.store` as mutable because it is also borrowed as immutable
[INFO] [stderr]    --> src/lib.rs:179:13
[INFO] [stderr]     |
[INFO] [stderr] 177 |         match &self.store.changes[ix] {
[INFO] [stderr]     |                ------------------ immutable borrow occurs here
[INFO] [stderr] 178 |           Change::Set{table, row, column, value} => {
[INFO] [stderr] 179 |             self.store.process_transaction(&Transaction::from_change(
[INFO] [stderr]     |             ^^^^^^^^^^ mutable borrow occurs here
[INFO] [stderr] 180 |               Change::Remove{table: *table, row: row.clone(), column: column.clone(), value: value.clone()}
[INFO] [stderr]     |                                     ------ immutable borrow later used here
[INFO] [stderr] 
[INFO] [stderr] error[E0502]: cannot borrow `self.store` as mutable because it is also borrowed as immutable
[INFO] [stderr]    --> src/lib.rs:184:13
[INFO] [stderr]     |
[INFO] [stderr] 177 |         match &self.store.changes[ix] {
[INFO] [stderr]     |                ------------------ immutable borrow occurs here
[INFO] [stderr] ...
[INFO] [stderr] 184 |             self.store.process_transaction(&Transaction::from_change(
[INFO] [stderr]     |             ^^^^^^^^^^ mutable borrow occurs here
[INFO] [stderr] 185 |               Change::Set{table: *table, row: row.clone(), column: column.clone(), value: value.clone()}
[INFO] [stderr]     |                                  ------ immutable borrow later used here
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/runtime.rs:128:19
[INFO] [stderr]     |
[INFO] [stderr] 128 |               let mut block = &mut self.blocks.get_mut(&register_address.block).unwrap();
[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: unused variable: `id`
[INFO] [stderr]   --> src/lib.rs:97:10
[INFO] [stderr]    |
[INFO] [stderr] 97 |     for (id, block) in self.runtime.blocks.iter() {
[INFO] [stderr]    |          ^^ help: consider prefixing with an underscore: `_id`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `constraint_text`
[INFO] [stderr]    --> src/lib.rs:103:12
[INFO] [stderr]     |
[INFO] [stderr] 103 |       for (constraint_text, constraints) in &block.constraints {
[INFO] [stderr]     |            ^^^^^^^^^^^^^^^ help: consider prefixing with an underscore: `_constraint_text`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `columns`
[INFO] [stderr]    --> src/lib.rs:188:38
[INFO] [stderr]     |
[INFO] [stderr] 188 |           Change::NewTable{id, rows, columns} => {
[INFO] [stderr]     |                                      ^^^^^^^ help: try ignoring the field: `columns: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `id`
[INFO] [stderr]    --> src/lib.rs:188:28
[INFO] [stderr]     |
[INFO] [stderr] 188 |           Change::NewTable{id, rows, columns} => {
[INFO] [stderr]     |                            ^^ help: try ignoring the field: `id: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `rows`
[INFO] [stderr]    --> src/lib.rs:188:32
[INFO] [stderr]     |
[INFO] [stderr] 188 |           Change::NewTable{id, rows, columns} => {
[INFO] [stderr]     |                                ^^^^ help: try ignoring the field: `rows: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]    --> src/lib.rs:202:9
[INFO] [stderr]     |
[INFO] [stderr] 202 |     for i in 0..steps {
[INFO] [stderr]     |         ^ help: consider prefixing with an underscore: `_i`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `column`
[INFO] [stderr]    --> src/database.rs:203:34
[INFO] [stderr]     |
[INFO] [stderr] 203 |       Change::Remove{table, row, column, value} => {
[INFO] [stderr]     |                                  ^^^^^^ help: try ignoring the field: `column: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `row`
[INFO] [stderr]    --> src/database.rs:203:29
[INFO] [stderr]     |
[INFO] [stderr] 203 |       Change::Remove{table, row, column, value} => {
[INFO] [stderr]     |                             ^^^ help: try ignoring the field: `row: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `table`
[INFO] [stderr]    --> src/database.rs:203:22
[INFO] [stderr]     |
[INFO] [stderr] 203 |       Change::Remove{table, row, column, value} => {
[INFO] [stderr]     |                      ^^^^^ help: try ignoring the field: `table: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `value`
[INFO] [stderr]    --> src/database.rs:203:42
[INFO] [stderr]     |
[INFO] [stderr] 203 |       Change::Remove{table, row, column, value} => {
[INFO] [stderr]     |                                          ^^^^^ help: try ignoring the field: `value: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `table`
[INFO] [stderr]   --> src/runtime.rs:65:11
[INFO] [stderr]    |
[INFO] [stderr] 65 |       let table = register.table;
[INFO] [stderr]    |           ^^^^^ help: consider prefixing with an underscore: `_table`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `column`
[INFO] [stderr]   --> src/runtime.rs:66:11
[INFO] [stderr]    |
[INFO] [stderr] 66 |       let column = register.column.clone();
[INFO] [stderr]    |           ^^^^^^ help: consider prefixing with an underscore: `_column`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `store`
[INFO] [stderr]   --> src/runtime.rs:58:54
[INFO] [stderr]    |
[INFO] [stderr] 58 |   pub fn register_block(&mut self, mut block: Block, store: &mut Interner) {
[INFO] [stderr]    |                                                      ^^^^^ help: consider prefixing with an underscore: `_store`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `table`
[INFO] [stderr]    --> src/runtime.rs:114:15
[INFO] [stderr]     |
[INFO] [stderr] 114 |           let table = register.table;
[INFO] [stderr]     |               ^^^^^ help: consider prefixing with an underscore: `_table`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `column`
[INFO] [stderr]    --> src/runtime.rs:115:15
[INFO] [stderr]     |
[INFO] [stderr] 115 |           let column = register.column.clone();
[INFO] [stderr]     |               ^^^^^^ help: consider prefixing with an underscore: `_column`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `constraint_text`
[INFO] [stderr]    --> src/runtime.rs:255:10
[INFO] [stderr]     |
[INFO] [stderr] 255 |     let (constraint_text, constraints) = constraint_tuple;
[INFO] [stderr]     |          ^^^^^^^^^^^^^^^ help: consider prefixing with an underscore: `_constraint_text`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `constraint_ix`
[INFO] [stderr]    --> src/runtime.rs:276:10
[INFO] [stderr]     |
[INFO] [stderr] 276 |     for (constraint_ix, constraint) in constraints.iter().enumerate() {
[INFO] [stderr]     |          ^^^^^^^^^^^^^ help: consider prefixing with an underscore: `_constraint_ix`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `from_table`
[INFO] [stderr]    --> src/runtime.rs:278:31
[INFO] [stderr]     |
[INFO] [stderr] 278 |         Constraint::CopyTable{from_table, to_table} => {
[INFO] [stderr]     |                               ^^^^^^^^^^ help: try ignoring the field: `from_table: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `from_table`
[INFO] [stderr]    --> src/runtime.rs:281:28
[INFO] [stderr]     |
[INFO] [stderr] 281 |         Constraint::Append{from_table, to_table} => {
[INFO] [stderr]     |                            ^^^^^^^^^^ help: try ignoring the field: `from_table: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `from_table`
[INFO] [stderr]    --> src/runtime.rs:290:35
[INFO] [stderr]     |
[INFO] [stderr] 290 |         Constraint::Insert{from: (from_table, ..), to: (to_table, ..)} => {
[INFO] [stderr]     |                                   ^^^^^^^^^^ help: consider prefixing with an underscore: `_from_table`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `indices`
[INFO] [stderr]    --> src/runtime.rs:299:33
[INFO] [stderr]     |
[INFO] [stderr] 299 |         Constraint::Scan{table, indices, output} => {
[INFO] [stderr]     |                                 ^^^^^^^ help: try ignoring the field: `indices: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `output`
[INFO] [stderr]    --> src/runtime.rs:299:42
[INFO] [stderr]     |
[INFO] [stderr] 299 |         Constraint::Scan{table, indices, output} => {
[INFO] [stderr]     |                                          ^^^^^^ help: try ignoring the field: `output: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `id`
[INFO] [stderr]    --> src/runtime.rs:334:29
[INFO] [stderr]     |
[INFO] [stderr] 334 |             TableId::Global(id) => (), // TODO Add global alias here
[INFO] [stderr]     |                             ^^ help: consider prefixing with an underscore: `_id`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `operation`
[INFO] [stderr]    --> src/runtime.rs:337:30
[INFO] [stderr]     |
[INFO] [stderr] 337 |         Constraint::Function{operation, parameters, output} => {
[INFO] [stderr]     |                              ^^^^^^^^^ help: try ignoring the field: `operation: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `output`
[INFO] [stderr]    --> src/runtime.rs:337:53
[INFO] [stderr]     |
[INFO] [stderr] 337 |         Constraint::Function{operation, parameters, output} => {
[INFO] [stderr]     |                                                     ^^^^^^ help: try ignoring the field: `output: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `rows`
[INFO] [stderr]    --> src/runtime.rs:338:23
[INFO] [stderr]     |
[INFO] [stderr] 338 |           for (table, rows, columns) in parameters {
[INFO] [stderr]     |                       ^^^^ help: consider prefixing with an underscore: `_rows`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `columns`
[INFO] [stderr]    --> src/runtime.rs:338:29
[INFO] [stderr]     |
[INFO] [stderr] 338 |           for (table, rows, columns) in parameters {
[INFO] [stderr]     |                             ^^^^^^^ help: consider prefixing with an underscore: `_columns`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `comparator`
[INFO] [stderr]    --> src/runtime.rs:347:28
[INFO] [stderr]     |
[INFO] [stderr] 347 |         Constraint::Filter{comparator, lhs, rhs, output} => {
[INFO] [stderr]     |                            ^^^^^^^^^^ help: try ignoring the field: `comparator: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `output`
[INFO] [stderr]    --> src/runtime.rs:347:50
[INFO] [stderr]     |
[INFO] [stderr] 347 |         Constraint::Filter{comparator, lhs, rhs, output} => {
[INFO] [stderr]     |                                                  ^^^^^^ help: try ignoring the field: `output: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `lhs_rows`
[INFO] [stderr]    --> src/runtime.rs:348:27
[INFO] [stderr]     |
[INFO] [stderr] 348 |           let (lhs_table, lhs_rows, lhs_columns) = lhs;
[INFO] [stderr]     |                           ^^^^^^^^ help: consider prefixing with an underscore: `_lhs_rows`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `rhs_rows`
[INFO] [stderr]    --> src/runtime.rs:349:27
[INFO] [stderr]     |
[INFO] [stderr] 349 |           let (rhs_table, rhs_rows, rhs_columns) = rhs;
[INFO] [stderr]     |                           ^^^^^^^^ help: consider prefixing with an underscore: `_rhs_rows`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `v`
[INFO] [stderr]    --> src/runtime.rs:387:27
[INFO] [stderr]     |
[INFO] [stderr] 387 |             Entry::Vacant(v) => {    
[INFO] [stderr]     |                           ^ help: consider prefixing with an underscore: `_v`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `v`
[INFO] [stderr]    --> src/runtime.rs:402:27
[INFO] [stderr]     |
[INFO] [stderr] 402 |             Entry::Vacant(v) => {    
[INFO] [stderr]     |                           ^ help: consider prefixing with an underscore: `_v`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `v`
[INFO] [stderr]    --> src/runtime.rs:413:27
[INFO] [stderr]     |
[INFO] [stderr] 413 |             Entry::Vacant(v) => {    
[INFO] [stderr]     |                           ^ help: consider prefixing with an underscore: `_v`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `v`
[INFO] [stderr]    --> src/runtime.rs:427:27
[INFO] [stderr]     |
[INFO] [stderr] 427 |             Entry::Vacant(v) => {    
[INFO] [stderr]     |                           ^ help: consider prefixing with an underscore: `_v`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `start_row`
[INFO] [stderr]    --> src/runtime.rs:643:21
[INFO] [stderr]     |
[INFO] [stderr] 643 |                 let start_row: usize = 0;
[INFO] [stderr]     |                     ^^^^^^^^^ help: consider prefixing with an underscore: `_start_row`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `rows`
[INFO] [stderr]    --> src/runtime.rs:666:25
[INFO] [stderr]     |
[INFO] [stderr] 666 |             for (table, rows, columns) in parameters {
[INFO] [stderr]     |                         ^^^^ help: consider prefixing with an underscore: `_rows`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `columns`
[INFO] [stderr]    --> src/runtime.rs:666:31
[INFO] [stderr]     |
[INFO] [stderr] 666 |             for (table, rows, columns) in parameters {
[INFO] [stderr]     |                               ^^^^^^^ help: consider prefixing with an underscore: `_columns`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `to_is_scalar`
[INFO] [stderr]     --> src/runtime.rs:1072:15
[INFO] [stderr]      |
[INFO] [stderr] 1072 |           let to_is_scalar = to_width == 1 && to_height == 1;
[INFO] [stderr]      |               ^^^^^^^^^^^^ help: consider prefixing with an underscore: `_to_is_scalar`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `column`
[INFO] [stderr]     --> src/runtime.rs:1307:40
[INFO] [stderr]      |
[INFO] [stderr] 1307 |       Constraint::Constant{table, row, column, value} => write!(f, "Constant({} -> #{:?})", value.to_float(), table),
[INFO] [stderr]      |                                        ^^^^^^ help: try ignoring the field: `column: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `row`
[INFO] [stderr]     --> src/runtime.rs:1307:35
[INFO] [stderr]      |
[INFO] [stderr] 1307 |       Constraint::Constant{table, row, column, value} => write!(f, "Constant({} -> #{:?})", value.to_float(), table),
[INFO] [stderr]      |                                   ^^^ help: try ignoring the field: `row: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `column`
[INFO] [stderr]     --> src/runtime.rs:1308:38
[INFO] [stderr]      |
[INFO] [stderr] 1308 |       Constraint::String{table, row, column, value} => write!(f, "String({:?} -> #{:?})", value, table),
[INFO] [stderr]      |                                      ^^^^^^ help: try ignoring the field: `column: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `row`
[INFO] [stderr]     --> src/runtime.rs:1308:33
[INFO] [stderr]      |
[INFO] [stderr] 1308 |       Constraint::String{table, row, column, value} => write!(f, "String({:?} -> #{:?})", value, table),
[INFO] [stderr]      |                                 ^^^ help: try ignoring the field: `row: _`
[INFO] [stderr] 
[INFO] [stderr] error[E0502]: cannot borrow `self.store` as mutable because it is also borrowed as immutable
[INFO] [stderr]    --> src/lib.rs:179:13
[INFO] [stderr]     |
[INFO] [stderr] 177 |         match &self.store.changes[ix] {
[INFO] [stderr]     |                ------------------ immutable borrow occurs here
[INFO] [stderr] 178 |           Change::Set{table, row, column, value} => {
[INFO] [stderr] 179 |             self.store.process_transaction(&Transaction::from_change(
[INFO] [stderr]     |             ^^^^^^^^^^ mutable borrow occurs here
[INFO] [stderr] 180 |               Change::Remove{table: *table, row: row.clone(), column: column.clone(), value: value.clone()}
[INFO] [stderr]     |                                     ------ immutable borrow later used here
[INFO] [stderr] 
[INFO] [stderr] error[E0502]: cannot borrow `self.store` as mutable because it is also borrowed as immutable
[INFO] [stderr]    --> src/lib.rs:184:13
[INFO] [stderr]     |
[INFO] [stderr] 177 |         match &self.store.changes[ix] {
[INFO] [stderr]     |                ------------------ immutable borrow occurs here
[INFO] [stderr] ...
[INFO] [stderr] 184 |             self.store.process_transaction(&Transaction::from_change(
[INFO] [stderr]     |             ^^^^^^^^^^ mutable borrow occurs here
[INFO] [stderr] 185 |               Change::Set{table: *table, row: row.clone(), column: column.clone(), value: value.clone()}
[INFO] [stderr]     |                                  ------ immutable borrow later used here
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0502`.
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/runtime.rs:128:19
[INFO] [stderr]     |
[INFO] [stderr] 128 |               let mut block = &mut self.blocks.get_mut(&register_address.block).unwrap();
[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] error: Could not compile `mech-core`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0502`.
[INFO] [stderr] error: Could not compile `mech-core`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "86330ca1aa7511e9b2aec937087081967bf1c0c9f3bce5dd30382266d0f015dc"`
[INFO] running `"docker" "rm" "-f" "86330ca1aa7511e9b2aec937087081967bf1c0c9f3bce5dd30382266d0f015dc"`
[INFO] [stdout] 86330ca1aa7511e9b2aec937087081967bf1c0c9f3bce5dd30382266d0f015dc