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[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] a379af0c2379f0e8e481165936b27365e1b1ac1c
[INFO] checking gluaxspeed/rust-compiler against master#45d050cde277b22a755847338f2acc2c7b834141 for pr-71393
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[INFO] running `"/workspace/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "+45d050cde277b22a755847338f2acc2c7b834141" "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] d46408aba147ec571c2a50f1ca09dc9985e163c4d105a7907c493a7c4eeb80b3
[INFO] running `"docker" "start" "-a" "d46408aba147ec571c2a50f1ca09dc9985e163c4d105a7907c493a7c4eeb80b3"`
[INFO] [stderr]     Checking lazy_static v1.3.0
[INFO] [stderr]     Checking compiler v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/parser/ast.rs:18:29
[INFO] [stderr]    |
[INFO] [stderr] 18 |     pub statements: Vec<Box<Statement>>,
[INFO] [stderr]    |                             ^^^^^^^^^ help: use `dyn`: `dyn Statement`
[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/parser/ast.rs:44:25
[INFO] [stderr]    |
[INFO] [stderr] 44 |     pub val: Option<Box<Expression>>,
[INFO] [stderr]    |                         ^^^^^^^^^^ help: use `dyn`: `dyn Expression`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/parser/ast.rs:68:32
[INFO] [stderr]    |
[INFO] [stderr] 68 |     pub return_val: Option<Box<Expression>>,
[INFO] [stderr]    |                                ^^^^^^^^^^ help: use `dyn`: `dyn Expression`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/parser/ast.rs:92:32
[INFO] [stderr]    |
[INFO] [stderr] 92 |     pub expression: Option<Box<Expression>>,
[INFO] [stderr]    |                                ^^^^^^^^^^ help: use `dyn`: `dyn Expression`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/parser/ast.rs:116:29
[INFO] [stderr]     |
[INFO] [stderr] 116 |     pub statements: Vec<Box<Statement>>,
[INFO] [stderr]     |                             ^^^^^^^^^ help: use `dyn`: `dyn Statement`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/parser/ast.rs:205:27
[INFO] [stderr]     |
[INFO] [stderr] 205 |     pub right: Option<Box<Expression>>,
[INFO] [stderr]     |                           ^^^^^^^^^^ help: use `dyn`: `dyn Expression`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/parser/ast.rs:230:19
[INFO] [stderr]     |
[INFO] [stderr] 230 |     pub left: Box<Expression>,
[INFO] [stderr]     |                   ^^^^^^^^^^ help: use `dyn`: `dyn Expression`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/parser/ast.rs:231:20
[INFO] [stderr]     |
[INFO] [stderr] 231 |     pub right: Box<Expression>,
[INFO] [stderr]     |                    ^^^^^^^^^^ help: use `dyn`: `dyn Expression`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/parser/ast.rs:252:19
[INFO] [stderr]     |
[INFO] [stderr] 252 |     pub cond: Box<Expression>,
[INFO] [stderr]     |                   ^^^^^^^^^^ help: use `dyn`: `dyn Expression`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/parser/ast.rs:315:19
[INFO] [stderr]     |
[INFO] [stderr] 315 |     pub func: Box<Expression>,
[INFO] [stderr]     |                   ^^^^^^^^^^ help: use `dyn`: `dyn Expression`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/parser/ast.rs:316:30
[INFO] [stderr]     |
[INFO] [stderr] 316 |     pub args: Option<Vec<Box<Expression>>>,
[INFO] [stderr]     |                              ^^^^^^^^^^ help: use `dyn`: `dyn Expression`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/parser.rs:34:52
[INFO] [stderr]    |
[INFO] [stderr] 34 | type PrefixParseFn = fn(&mut Parser) -> Option<Box<ast::Expression>>;
[INFO] [stderr]    |                                                    ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn ast::Expression`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/parser.rs:35:41
[INFO] [stderr]    |
[INFO] [stderr] 35 | type InfixParseFn = fn(&mut Parser, Box<ast::Expression>) -> Box<ast::Expression>;
[INFO] [stderr]    |                                         ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn ast::Expression`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/parser.rs:35:66
[INFO] [stderr]    |
[INFO] [stderr] 35 | type InfixParseFn = fn(&mut Parser, Box<ast::Expression>) -> Box<ast::Expression>;
[INFO] [stderr]    |                                                                  ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn ast::Expression`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/parser.rs:45:48
[INFO] [stderr]    |
[INFO] [stderr] 45 | fn parse_ident(par: &mut Parser) -> Option<Box<ast::Expression>> {
[INFO] [stderr]    |                                                ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn ast::Expression`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/parser.rs:52:54
[INFO] [stderr]    |
[INFO] [stderr] 52 | fn parse_int_literal(par: &mut Parser) -> Option<Box<ast::Expression>> {
[INFO] [stderr]    |                                                      ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn ast::Expression`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/parser.rs:67:47
[INFO] [stderr]    |
[INFO] [stderr] 67 | fn parse_bool(par: &mut Parser) -> Option<Box<ast::Expression>> {
[INFO] [stderr]    |                                               ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn ast::Expression`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/parser.rs:74:61
[INFO] [stderr]    |
[INFO] [stderr] 74 | fn parse_grouped_expression(par: &mut Parser) -> Option<Box<ast::Expression>> {
[INFO] [stderr]    |                                                             ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn ast::Expression`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/parser.rs:86:60
[INFO] [stderr]    |
[INFO] [stderr] 86 | fn parse_prefix_expression(par: &mut Parser) -> Option<Box<ast::Expression>> {
[INFO] [stderr]    |                                                            ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn ast::Expression`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/parser.rs:97:56
[INFO] [stderr]    |
[INFO] [stderr] 97 | fn parse_if_expression(par: &mut Parser) -> Option<Box<ast::Expression>> {
[INFO] [stderr]    |                                                        ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn ast::Expression`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/parser.rs:133:59
[INFO] [stderr]     |
[INFO] [stderr] 133 | fn parse_function_literal(par: &mut Parser) -> Option<Box<ast::Expression>> {
[INFO] [stderr]     |                                                           ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn ast::Expression`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/parser.rs:157:55
[INFO] [stderr]     |
[INFO] [stderr] 157 | fn parse_infix_expression(par: &mut Parser, left: Box<ast::Expression>) -> Box<ast::Expression> {
[INFO] [stderr]     |                                                       ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn ast::Expression`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/parser.rs:157:80
[INFO] [stderr]     |
[INFO] [stderr] 157 | fn parse_infix_expression(par: &mut Parser, left: Box<ast::Expression>) -> Box<ast::Expression> {
[INFO] [stderr]     |                                                                                ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn ast::Expression`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/parser.rs:171:54
[INFO] [stderr]     |
[INFO] [stderr] 171 | fn parse_call_expression(par: &mut Parser, func: Box<ast::Expression>) -> Box<ast::Expression> {
[INFO] [stderr]     |                                                      ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn ast::Expression`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/parser.rs:171:79
[INFO] [stderr]     |
[INFO] [stderr] 171 | fn parse_call_expression(par: &mut Parser, func: Box<ast::Expression>) -> Box<ast::Expression> {
[INFO] [stderr]     |                                                                               ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn ast::Expression`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/parser.rs:208:32
[INFO] [stderr]     |
[INFO] [stderr] 208 |         let mut stmts: Vec<Box<ast::Statement>> = Vec::new();
[INFO] [stderr]     |                                ^^^^^^^^^^^^^^ help: use `dyn`: `dyn ast::Statement`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/parser.rs:271:53
[INFO] [stderr]     |
[INFO] [stderr] 271 |     fn parse_call_args(&mut self) -> Option<Vec<Box<ast::Expression>>> {
[INFO] [stderr]     |                                                     ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn ast::Expression`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/parser.rs:272:31
[INFO] [stderr]     |
[INFO] [stderr] 272 |         let mut args: Vec<Box<ast::Expression>> = Vec::new();
[INFO] [stderr]     |                               ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn ast::Expression`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/parser.rs:315:66
[INFO] [stderr]     |
[INFO] [stderr] 315 |     fn parse_expression(&mut self, precedence: u8) -> Option<Box<ast::Expression>> {
[INFO] [stderr]     |                                                                  ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn ast::Expression`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/parser.rs:348:53
[INFO] [stderr]     |
[INFO] [stderr] 348 |     fn parse_let_statement(&mut self) -> Option<Box<ast::Statement>> {
[INFO] [stderr]     |                                                     ^^^^^^^^^^^^^^ help: use `dyn`: `dyn ast::Statement`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/parser.rs:377:56
[INFO] [stderr]     |
[INFO] [stderr] 377 |     fn parse_return_statement(&mut self) -> Option<Box<ast::Statement>> {
[INFO] [stderr]     |                                                        ^^^^^^^^^^^^^^ help: use `dyn`: `dyn ast::Statement`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/parser.rs:392:60
[INFO] [stderr]     |
[INFO] [stderr] 392 |     fn parse_expression_statement(&mut self) -> Option<Box<ast::Statement>> {
[INFO] [stderr]     |                                                            ^^^^^^^^^^^^^^ help: use `dyn`: `dyn ast::Statement`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/parser.rs:406:49
[INFO] [stderr]     |
[INFO] [stderr] 406 |     fn parse_statement(&mut self) -> Option<Box<ast::Statement>> {
[INFO] [stderr]     |                                                 ^^^^^^^^^^^^^^ help: use `dyn`: `dyn ast::Statement`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/parser.rs:415:32
[INFO] [stderr]     |
[INFO] [stderr] 415 |         let mut stmts: Vec<Box<ast::Statement>> = Vec::new();
[INFO] [stderr]     |                                ^^^^^^^^^^^^^^ help: use `dyn`: `dyn ast::Statement`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/parser/ast.rs:18:29
[INFO] [stderr]    |
[INFO] [stderr] 18 |     pub statements: Vec<Box<Statement>>,
[INFO] [stderr]    |                             ^^^^^^^^^ help: use `dyn`: `dyn Statement`
[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/parser/ast.rs:44:25
[INFO] [stderr]    |
[INFO] [stderr] 44 |     pub val: Option<Box<Expression>>,
[INFO] [stderr]    |                         ^^^^^^^^^^ help: use `dyn`: `dyn Expression`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/parser/ast.rs:68:32
[INFO] [stderr]    |
[INFO] [stderr] 68 |     pub return_val: Option<Box<Expression>>,
[INFO] [stderr]    |                                ^^^^^^^^^^ help: use `dyn`: `dyn Expression`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/parser/ast.rs:92:32
[INFO] [stderr]    |
[INFO] [stderr] 92 |     pub expression: Option<Box<Expression>>,
[INFO] [stderr]    |                                ^^^^^^^^^^ help: use `dyn`: `dyn Expression`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/parser/ast.rs:116:29
[INFO] [stderr]     |
[INFO] [stderr] 116 |     pub statements: Vec<Box<Statement>>,
[INFO] [stderr]     |                             ^^^^^^^^^ help: use `dyn`: `dyn Statement`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/parser/ast.rs:205:27
[INFO] [stderr]     |
[INFO] [stderr] 205 |     pub right: Option<Box<Expression>>,
[INFO] [stderr]     |                           ^^^^^^^^^^ help: use `dyn`: `dyn Expression`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/parser/ast.rs:230:19
[INFO] [stderr]     |
[INFO] [stderr] 230 |     pub left: Box<Expression>,
[INFO] [stderr]     |                   ^^^^^^^^^^ help: use `dyn`: `dyn Expression`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/parser/ast.rs:231:20
[INFO] [stderr]     |
[INFO] [stderr] 231 |     pub right: Box<Expression>,
[INFO] [stderr]     |                    ^^^^^^^^^^ help: use `dyn`: `dyn Expression`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/parser/ast.rs:252:19
[INFO] [stderr]     |
[INFO] [stderr] 252 |     pub cond: Box<Expression>,
[INFO] [stderr]     |                   ^^^^^^^^^^ help: use `dyn`: `dyn Expression`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/parser/ast.rs:315:19
[INFO] [stderr]     |
[INFO] [stderr] 315 |     pub func: Box<Expression>,
[INFO] [stderr]     |                   ^^^^^^^^^^ help: use `dyn`: `dyn Expression`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/parser/ast.rs:316:30
[INFO] [stderr]     |
[INFO] [stderr] 316 |     pub args: Option<Vec<Box<Expression>>>,
[INFO] [stderr]     |                              ^^^^^^^^^^ help: use `dyn`: `dyn Expression`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/parser.rs:34:52
[INFO] [stderr]    |
[INFO] [stderr] 34 | type PrefixParseFn = fn(&mut Parser) -> Option<Box<ast::Expression>>;
[INFO] [stderr]    |                                                    ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn ast::Expression`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/parser.rs:35:41
[INFO] [stderr]    |
[INFO] [stderr] 35 | type InfixParseFn = fn(&mut Parser, Box<ast::Expression>) -> Box<ast::Expression>;
[INFO] [stderr]    |                                         ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn ast::Expression`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/parser.rs:35:66
[INFO] [stderr]    |
[INFO] [stderr] 35 | type InfixParseFn = fn(&mut Parser, Box<ast::Expression>) -> Box<ast::Expression>;
[INFO] [stderr]    |                                                                  ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn ast::Expression`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/parser.rs:45:48
[INFO] [stderr]    |
[INFO] [stderr] 45 | fn parse_ident(par: &mut Parser) -> Option<Box<ast::Expression>> {
[INFO] [stderr]    |                                                ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn ast::Expression`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/parser.rs:52:54
[INFO] [stderr]    |
[INFO] [stderr] 52 | fn parse_int_literal(par: &mut Parser) -> Option<Box<ast::Expression>> {
[INFO] [stderr]    |                                                      ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn ast::Expression`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/parser.rs:67:47
[INFO] [stderr]    |
[INFO] [stderr] 67 | fn parse_bool(par: &mut Parser) -> Option<Box<ast::Expression>> {
[INFO] [stderr]    |                                               ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn ast::Expression`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/parser.rs:74:61
[INFO] [stderr]    |
[INFO] [stderr] 74 | fn parse_grouped_expression(par: &mut Parser) -> Option<Box<ast::Expression>> {
[INFO] [stderr]    |                                                             ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn ast::Expression`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/parser.rs:86:60
[INFO] [stderr]    |
[INFO] [stderr] 86 | fn parse_prefix_expression(par: &mut Parser) -> Option<Box<ast::Expression>> {
[INFO] [stderr]    |                                                            ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn ast::Expression`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/parser.rs:97:56
[INFO] [stderr]    |
[INFO] [stderr] 97 | fn parse_if_expression(par: &mut Parser) -> Option<Box<ast::Expression>> {
[INFO] [stderr]    |                                                        ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn ast::Expression`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/parser.rs:133:59
[INFO] [stderr]     |
[INFO] [stderr] 133 | fn parse_function_literal(par: &mut Parser) -> Option<Box<ast::Expression>> {
[INFO] [stderr]     |                                                           ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn ast::Expression`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/parser.rs:157:55
[INFO] [stderr]     |
[INFO] [stderr] 157 | fn parse_infix_expression(par: &mut Parser, left: Box<ast::Expression>) -> Box<ast::Expression> {
[INFO] [stderr]     |                                                       ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn ast::Expression`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/parser.rs:157:80
[INFO] [stderr]     |
[INFO] [stderr] 157 | fn parse_infix_expression(par: &mut Parser, left: Box<ast::Expression>) -> Box<ast::Expression> {
[INFO] [stderr]     |                                                                                ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn ast::Expression`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/parser.rs:171:54
[INFO] [stderr]     |
[INFO] [stderr] 171 | fn parse_call_expression(par: &mut Parser, func: Box<ast::Expression>) -> Box<ast::Expression> {
[INFO] [stderr]     |                                                      ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn ast::Expression`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/parser.rs:171:79
[INFO] [stderr]     |
[INFO] [stderr] 171 | fn parse_call_expression(par: &mut Parser, func: Box<ast::Expression>) -> Box<ast::Expression> {
[INFO] [stderr]     |                                                                               ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn ast::Expression`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/parser.rs:208:32
[INFO] [stderr]     |
[INFO] [stderr] 208 |         let mut stmts: Vec<Box<ast::Statement>> = Vec::new();
[INFO] [stderr]     |                                ^^^^^^^^^^^^^^ help: use `dyn`: `dyn ast::Statement`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/parser.rs:271:53
[INFO] [stderr]     |
[INFO] [stderr] 271 |     fn parse_call_args(&mut self) -> Option<Vec<Box<ast::Expression>>> {
[INFO] [stderr]     |                                                     ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn ast::Expression`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/parser.rs:272:31
[INFO] [stderr]     |
[INFO] [stderr] 272 |         let mut args: Vec<Box<ast::Expression>> = Vec::new();
[INFO] [stderr]     |                               ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn ast::Expression`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/parser.rs:315:66
[INFO] [stderr]     |
[INFO] [stderr] 315 |     fn parse_expression(&mut self, precedence: u8) -> Option<Box<ast::Expression>> {
[INFO] [stderr]     |                                                                  ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn ast::Expression`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/parser.rs:348:53
[INFO] [stderr]     |
[INFO] [stderr] 348 |     fn parse_let_statement(&mut self) -> Option<Box<ast::Statement>> {
[INFO] [stderr]     |                                                     ^^^^^^^^^^^^^^ help: use `dyn`: `dyn ast::Statement`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/parser.rs:377:56
[INFO] [stderr]     |
[INFO] [stderr] 377 |     fn parse_return_statement(&mut self) -> Option<Box<ast::Statement>> {
[INFO] [stderr]     |                                                        ^^^^^^^^^^^^^^ help: use `dyn`: `dyn ast::Statement`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/parser.rs:392:60
[INFO] [stderr]     |
[INFO] [stderr] 392 |     fn parse_expression_statement(&mut self) -> Option<Box<ast::Statement>> {
[INFO] [stderr]     |                                                            ^^^^^^^^^^^^^^ help: use `dyn`: `dyn ast::Statement`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/parser.rs:406:49
[INFO] [stderr]     |
[INFO] [stderr] 406 |     fn parse_statement(&mut self) -> Option<Box<ast::Statement>> {
[INFO] [stderr]     |                                                 ^^^^^^^^^^^^^^ help: use `dyn`: `dyn ast::Statement`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/parser.rs:415:32
[INFO] [stderr]     |
[INFO] [stderr] 415 |         let mut stmts: Vec<Box<ast::Statement>> = Vec::new();
[INFO] [stderr]     |                                ^^^^^^^^^^^^^^ help: use `dyn`: `dyn ast::Statement`
[INFO] [stderr] 
[INFO] [stderr] warning: 34 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: 34 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.45s
[INFO] running `"docker" "inspect" "d46408aba147ec571c2a50f1ca09dc9985e163c4d105a7907c493a7c4eeb80b3"`
[INFO] running `"docker" "rm" "-f" "d46408aba147ec571c2a50f1ca09dc9985e163c4d105a7907c493a7c4eeb80b3"`
[INFO] [stdout] d46408aba147ec571c2a50f1ca09dc9985e163c4d105a7907c493a7c4eeb80b3