[INFO] cloning repository https://github.com/n4to4/interpreter-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/n4to4/interpreter-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fn4to4%2Finterpreter-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fn4to4%2Finterpreter-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 14ece5df4d2e1a7f60069af47418825a0d3bcc78
[INFO] checking n4to4/interpreter-rs against try#f47dd4da3ae8c32c9e65d307bfe640b143e674df for pr-77526
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fn4to4%2Finterpreter-rs" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/n4to4/interpreter-rs on toolchain f47dd4da3ae8c32c9e65d307bfe640b143e674df
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/n4to4/interpreter-rs
[INFO] finished tweaking git repo https://github.com/n4to4/interpreter-rs
[INFO] tweaked toml for git repo https://github.com/n4to4/interpreter-rs written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/n4to4/interpreter-rs already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 160c0073ac6a3d6a87a44a625e62b6f4720ce5e48b99ea195a218bb6b3fbe590
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "160c0073ac6a3d6a87a44a625e62b6f4720ce5e48b99ea195a218bb6b3fbe590", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "160c0073ac6a3d6a87a44a625e62b6f4720ce5e48b99ea195a218bb6b3fbe590", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "160c0073ac6a3d6a87a44a625e62b6f4720ce5e48b99ea195a218bb6b3fbe590", kill_on_drop: false }`
[INFO] [stdout] 160c0073ac6a3d6a87a44a625e62b6f4720ce5e48b99ea195a218bb6b3fbe590
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 815a371682c8e6b17348f77caa8befafc18247eaf725a73130b98fe8318a3ae4
[INFO] running `Command { std: "docker" "start" "-a" "815a371682c8e6b17348f77caa8befafc18247eaf725a73130b98fe8318a3ae4", kill_on_drop: false }`
[INFO] [stderr]     Checking difference v2.0.0
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]     Checking pretty_assertions v0.5.1
[INFO] [stderr]     Checking interpreter v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/ast.rs:24:29
[INFO] [stdout]    |
[INFO] [stdout] 24 |     pub statements: Vec<Box<Statement>>,
[INFO] [stdout]    |                             ^^^^^^^^^ help: use `dyn`: `dyn Statement`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/ast.rs:84:32
[INFO] [stdout]    |
[INFO] [stdout] 84 |     fn as_statement(&self) -> &Statement;
[INFO] [stdout]    |                                ^^^^^^^^^ help: use `dyn`: `dyn Statement`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/ast.rs:85:38
[INFO] [stdout]    |
[INFO] [stdout] 85 |     fn as_box_statement(self) -> Box<Statement>;
[INFO] [stdout]    |                                      ^^^^^^^^^ help: use `dyn`: `dyn Statement`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/ast.rs:88:32
[INFO] [stdout]    |
[INFO] [stdout] 88 |     fn as_statement(&self) -> &Statement {
[INFO] [stdout]    |                                ^^^^^^^^^ help: use `dyn`: `dyn Statement`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/ast.rs:92:38
[INFO] [stdout]    |
[INFO] [stdout] 92 |     fn as_box_statement(self) -> Box<Statement> {
[INFO] [stdout]    |                                      ^^^^^^^^^ help: use `dyn`: `dyn Statement`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/parser.rs:46:49
[INFO] [stdout]    |
[INFO] [stdout] 46 |     fn parse_statement(&mut self) -> Option<Box<ast::Statement>> {
[INFO] [stdout]    |                                                 ^^^^^^^^^^^^^^ help: use `dyn`: `dyn ast::Statement`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/parser.rs:104:28
[INFO] [stdout]     |
[INFO] [stdout] 104 |     fn print_if_string(s: &Any) {
[INFO] [stdout]     |                            ^^^ help: use `dyn`: `dyn Any`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/parser.rs:130:37
[INFO] [stdout]     |
[INFO] [stdout] 130 |     fn assert_let_statement(s: &Box<Statement>, name: &str) {
[INFO] [stdout]     |                                     ^^^^^^^^^ help: use `dyn`: `dyn Statement`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `NOT_EQ` should have an upper camel case name
[INFO] [stdout]   --> src/token.rs:27:5
[INFO] [stdout]    |
[INFO] [stdout] 27 |     NOT_EQ,
[INFO] [stdout]    |     ^^^^^^ help: convert the identifier to upper camel case: `NotEq`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/ast.rs:24:29
[INFO] [stdout]    |
[INFO] [stdout] 24 |     pub statements: Vec<Box<Statement>>,
[INFO] [stdout]    |                             ^^^^^^^^^ help: use `dyn`: `dyn Statement`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/ast.rs:84:32
[INFO] [stdout]    |
[INFO] [stdout] 84 |     fn as_statement(&self) -> &Statement;
[INFO] [stdout]    |                                ^^^^^^^^^ help: use `dyn`: `dyn Statement`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/ast.rs:85:38
[INFO] [stdout]    |
[INFO] [stdout] 85 |     fn as_box_statement(self) -> Box<Statement>;
[INFO] [stdout]    |                                      ^^^^^^^^^ help: use `dyn`: `dyn Statement`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/ast.rs:88:32
[INFO] [stdout]    |
[INFO] [stdout] 88 |     fn as_statement(&self) -> &Statement {
[INFO] [stdout]    |                                ^^^^^^^^^ help: use `dyn`: `dyn Statement`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/ast.rs:92:38
[INFO] [stdout]    |
[INFO] [stdout] 92 |     fn as_box_statement(self) -> Box<Statement> {
[INFO] [stdout]    |                                      ^^^^^^^^^ help: use `dyn`: `dyn Statement`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/parser.rs:46:49
[INFO] [stdout]    |
[INFO] [stdout] 46 |     fn parse_statement(&mut self) -> Option<Box<ast::Statement>> {
[INFO] [stdout]    |                                                 ^^^^^^^^^^^^^^ help: use `dyn`: `dyn ast::Statement`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `NOT_EQ` should have an upper camel case name
[INFO] [stdout]   --> src/token.rs:27:5
[INFO] [stdout]    |
[INFO] [stdout] 27 |     NOT_EQ,
[INFO] [stdout]    |     ^^^^^^ help: convert the identifier to upper camel case: `NotEq`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/repl.rs:17:17
[INFO] [stdout]    |
[INFO] [stdout] 17 |             let mut l = Lexer::new(line);
[INFO] [stdout]    |                 ----^
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Program`
[INFO] [stdout]   --> src/ast.rs:23:12
[INFO] [stdout]    |
[INFO] [stdout] 23 | pub struct Program {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/ast.rs:27:12
[INFO] [stdout]    |
[INFO] [stdout] 27 |     pub fn new() -> Program {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `token_literal`
[INFO] [stdout]   --> src/ast.rs:33:8
[INFO] [stdout]    |
[INFO] [stdout] 33 |     fn token_literal(&self) -> String {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Parser`
[INFO] [stdout]  --> src/parser.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | struct Parser<'a> {
[INFO] [stdout]   |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/parser.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout] 12 |     fn new(l: &'a mut Lexer) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `next_token`
[INFO] [stdout]   --> src/parser.rs:23:8
[INFO] [stdout]    |
[INFO] [stdout] 23 |     fn next_token(&mut self) {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `parse_program`
[INFO] [stdout]   --> src/parser.rs:31:8
[INFO] [stdout]    |
[INFO] [stdout] 31 |     fn parse_program(&mut self) -> Option<Program> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `parse_statement`
[INFO] [stdout]   --> src/parser.rs:46:8
[INFO] [stdout]    |
[INFO] [stdout] 46 |     fn parse_statement(&mut self) -> Option<Box<ast::Statement>> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `parse_let_statement`
[INFO] [stdout]   --> src/parser.rs:53:8
[INFO] [stdout]    |
[INFO] [stdout] 53 |     fn parse_let_statement(&mut self) -> Option<ast::LetStatement> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `cur_token_is`
[INFO] [stdout]   --> src/parser.rs:81:8
[INFO] [stdout]    |
[INFO] [stdout] 81 |     fn cur_token_is(&self, t: token::TokenType) -> bool {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `peek_token_is`
[INFO] [stdout]   --> src/parser.rs:84:8
[INFO] [stdout]    |
[INFO] [stdout] 84 |     fn peek_token_is(&self, t: token::TokenType) -> bool {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `expect_peek`
[INFO] [stdout]   --> src/parser.rs:87:8
[INFO] [stdout]    |
[INFO] [stdout] 87 |     fn expect_peek(&mut self, t: token::TokenType) -> bool {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 20 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/repl.rs:17:17
[INFO] [stdout]    |
[INFO] [stdout] 17 |             let mut l = Lexer::new(line);
[INFO] [stdout]    |                 ----^
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `token_literal`
[INFO] [stdout]   --> src/ast.rs:33:8
[INFO] [stdout]    |
[INFO] [stdout] 33 |     fn token_literal(&self) -> String {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `print_if_string`
[INFO] [stdout]    --> src/parser.rs:104:8
[INFO] [stdout]     |
[INFO] [stdout] 104 |     fn print_if_string(s: &Any) {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 12 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.82s
[INFO] running `Command { std: "docker" "inspect" "815a371682c8e6b17348f77caa8befafc18247eaf725a73130b98fe8318a3ae4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "815a371682c8e6b17348f77caa8befafc18247eaf725a73130b98fe8318a3ae4", kill_on_drop: false }`
[INFO] [stdout] 815a371682c8e6b17348f77caa8befafc18247eaf725a73130b98fe8318a3ae4