[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] building n4to4/interpreter-rs against try#434cce50d8e9a9de0ddaaccaca51e3e3f4bbb275 for pr-101591
[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 434cce50d8e9a9de0ddaaccaca51e3e3f4bbb275
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+434cce50d8e9a9de0ddaaccaca51e3e3f4bbb275" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", 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" "+434cce50d8e9a9de0ddaaccaca51e3e3f4bbb275" "fetch" "--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:824c28ce115f6b999260af6986f3384c158e782489540e41c0b698ca1d9fd927" "/opt/rustwide/cargo-home/bin/cargo" "+434cce50d8e9a9de0ddaaccaca51e3e3f4bbb275" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8c1ad8871b98ef6c5c8080e33c0e5acf93a1261fa0051ed4fe293e7ab94a9a50
[INFO] running `Command { std: "docker" "start" "-a" "8c1ad8871b98ef6c5c8080e33c0e5acf93a1261fa0051ed4fe293e7ab94a9a50", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8c1ad8871b98ef6c5c8080e33c0e5acf93a1261fa0051ed4fe293e7ab94a9a50", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8c1ad8871b98ef6c5c8080e33c0e5acf93a1261fa0051ed4fe293e7ab94a9a50", kill_on_drop: false }`
[INFO] [stdout] 8c1ad8871b98ef6c5c8080e33c0e5acf93a1261fa0051ed4fe293e7ab94a9a50
[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" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:824c28ce115f6b999260af6986f3384c158e782489540e41c0b698ca1d9fd927" "/opt/rustwide/cargo-home/bin/cargo" "+434cce50d8e9a9de0ddaaccaca51e3e3f4bbb275" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d044a527fcb804a76dd7a78ebdb8ddfe70227dbdf938f6c629e1a01ab381cdaa
[INFO] running `Command { std: "docker" "start" "-a" "d044a527fcb804a76dd7a78ebdb8ddfe70227dbdf938f6c629e1a01ab381cdaa", kill_on_drop: false }`
[INFO] [stderr]    Compiling ansi_term v0.11.0
[INFO] [stderr]    Compiling difference v2.0.0
[INFO] [stderr]    Compiling downcast-rs v1.0.3
[INFO] [stderr]    Compiling pretty_assertions v0.5.1
[INFO] [stderr]    Compiling interpreter v0.1.0 (/opt/rustwide/workdir)
[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]    |                             ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 24 -     pub statements: Vec<Box<Statement>>,
[INFO] [stdout] 24 +     pub statements: Vec<Box<dyn Statement>>,
[INFO] [stdout]    |
[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]    |                                ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 84 -     fn as_statement(&self) -> &Statement;
[INFO] [stdout] 84 +     fn as_statement(&self) -> &dyn Statement;
[INFO] [stdout]    |
[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]    |                                      ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 85 -     fn as_box_statement(self) -> Box<Statement>;
[INFO] [stdout] 85 +     fn as_box_statement(self) -> Box<dyn Statement>;
[INFO] [stdout]    |
[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]    |                                ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 88 -     fn as_statement(&self) -> &Statement {
[INFO] [stdout] 88 +     fn as_statement(&self) -> &dyn Statement {
[INFO] [stdout]    |
[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]    |                                      ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 92 -     fn as_box_statement(self) -> Box<Statement> {
[INFO] [stdout] 92 +     fn as_box_statement(self) -> Box<dyn Statement> {
[INFO] [stdout]    |
[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]    |                                                 ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 46 -     fn parse_statement(&mut self) -> Option<Box<ast::Statement>> {
[INFO] [stdout] 46 +     fn parse_statement(&mut self) -> Option<Box<dyn ast::Statement>> {
[INFO] [stdout]    |
[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 `Program` is never constructed
[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 `new` is never used
[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 `token_literal` is never used
[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 `Parser` is never constructed
[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 `new` is never used
[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 `next_token` is never used
[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 `parse_program` is never used
[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 `parse_statement` is never used
[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 `parse_let_statement` is never used
[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 `cur_token_is` is never used
[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 `peek_token_is` is never used
[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 `expect_peek` is never used
[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] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.41s
[ERROR] error running command: no output for 300 seconds
[INFO] running `Command { std: "docker" "inspect" "d044a527fcb804a76dd7a78ebdb8ddfe70227dbdf938f6c629e1a01ab381cdaa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d044a527fcb804a76dd7a78ebdb8ddfe70227dbdf938f6c629e1a01ab381cdaa", kill_on_drop: false }`
[INFO] [stdout] d044a527fcb804a76dd7a78ebdb8ddfe70227dbdf938f6c629e1a01ab381cdaa