[INFO] cloning repository https://github.com/lions-language/rust-toy-language
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/lions-language/rust-toy-language" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flions-language%2Frust-toy-language", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flions-language%2Frust-toy-language'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f3ffd2772770c7e1016c86389eb4c45527197d38
[INFO] testing lions-language/rust-toy-language against beta-2022-04-10 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flions-language%2Frust-toy-language" "/workspace/builds/worker-112/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-112/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/lions-language/rust-toy-language on toolchain beta-2022-04-10
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/lions-language/rust-toy-language
[INFO] finished tweaking git repo https://github.com/lions-language/rust-toy-language
[INFO] tweaked toml for git repo https://github.com/lions-language/rust-toy-language written to /workspace/builds/worker-112/source/Cargo.toml
[INFO] crate git repo https://github.com/lions-language/rust-toy-language already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-112/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-112/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7caf6273b59fb121aed4a255702508a35385038cd637a7e2e4cca3a44f133944
[INFO] running `Command { std: "docker" "start" "-a" "7caf6273b59fb121aed4a255702508a35385038cd637a7e2e4cca3a44f133944", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7caf6273b59fb121aed4a255702508a35385038cd637a7e2e4cca3a44f133944", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7caf6273b59fb121aed4a255702508a35385038cd637a7e2e4cca3a44f133944", kill_on_drop: false }`
[INFO] [stdout] 7caf6273b59fb121aed4a255702508a35385038cd637a7e2e4cca3a44f133944
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-112/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-112/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=warn" "-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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 841a02fad5e0f41d00d7b15bd327bb04651ca65bd5534e1e83fea32e9759befd
[INFO] running `Command { std: "docker" "start" "-a" "841a02fad5e0f41d00d7b15bd327bb04651ca65bd5534e1e83fea32e9759befd", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.36
[INFO] [stderr]    Compiling syn v1.0.86
[INFO] [stderr]    Compiling utils v0.1.0 (/opt/rustwide/workdir/src/utils)
[INFO] [stderr]    Compiling matches v0.1.9
[INFO] [stderr]    Compiling lexical v0.1.0 (/opt/rustwide/workdir/src/lexical)
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]   --> src/lexical/src/parser/from_string.rs:86:29
[INFO] [stdout]    |
[INFO] [stdout] 86 |                 '0'..='9' | '.' => {
[INFO] [stdout]    |                             ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lexical/src/parser/from_string.rs:104:33
[INFO] [stdout]     |
[INFO] [stdout] 104 | ...                   let mut suffix = self.peeking_take_while(chars, |ch| self.is_char(ch));
[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: variable does not need to be mutable
[INFO] [stdout]    --> src/lexical/src/parser/from_string.rs:114:25
[INFO] [stdout]     |
[INFO] [stdout] 114 |                     let mut s = self.peeking_take_while(chars, |ch| ch != '"');
[INFO] [stdout]     |                         ----^
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling num-bigint v0.4.3
[INFO] [stderr]    Compiling quote v1.0.15
[INFO] [stderr]    Compiling enum-ordinalize v3.1.10
[INFO] [stderr]    Compiling derive-new v0.5.9
[INFO] [stderr]    Compiling educe v0.4.18
[INFO] [stderr]    Compiling grammar v0.1.0 (/opt/rustwide/workdir/src/grammar)
[INFO] [stderr] error: could not compile `grammar` due to 2 previous errors; 11 warnings emitted
[INFO] [stdout] warning: unused imports: `Expr`, `SharedCell`
[INFO] [stdout]  --> src/grammar/src/parser/parser.rs:3:44
[INFO] [stdout]   |
[INFO] [stdout] 3 |     CustomTypeObjectDeclaration, DataType, Expr, ExprNode, FuncCall, FuncType, FunctionDef, Ident,
[INFO] [stdout]   |                                            ^^^^
[INFO] [stdout] 4 |     IfStatement, ImplStatement, PeriodAccess, ReturnStatement, SharedAstNode, SharedCell,
[INFO] [stdout]   |                                                                               ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::cell::RefCell`
[INFO] [stdout]  --> src/grammar/src/parser/parser.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use std::cell::RefCell;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::rc::Rc`
[INFO] [stdout]   --> src/grammar/src/parser/parser.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use std::rc::Rc;
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fmt`
[INFO] [stdout]  --> src/grammar/src/parser/scope.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::fmt;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::cell::RefCell`
[INFO] [stdout]  --> src/grammar/src/parser/symbol.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::cell::RefCell;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::rc::Rc`
[INFO] [stdout]  --> src/grammar/src/parser/symbol.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::rc::Rc;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Scope`
[INFO] [stdout]  --> src/grammar/src/parser/symbol.rs:5:36
[INFO] [stdout]   |
[INFO] [stdout] 5 | use super::{DataType, FunctionDef, Scope, SharedAstNode, SharedScope, StructDef};
[INFO] [stdout]   |                                    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `FromString`
[INFO] [stdout]  --> src/grammar/src/lib.rs:9:26
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub(crate) use lexical::{FromString, Keyword, LexicalParser, Token, TokenReader, Word};
[INFO] [stdout]   |                          ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/grammar/src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(box_into_inner)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::borrow::Borrow`
[INFO] [stdout]  --> src/grammar/src/parser/mod.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::borrow::Borrow;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::ops::Deref`
[INFO] [stdout]  --> src/grammar/src/parser/scope.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::ops::Deref;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `LexicalParser`
[INFO] [stdout]  --> src/grammar/src/lib.rs:9:47
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub(crate) use lexical::{FromString, Keyword, LexicalParser, Token, TokenReader, Word};
[INFO] [stdout]   |                                               ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 11 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "841a02fad5e0f41d00d7b15bd327bb04651ca65bd5534e1e83fea32e9759befd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "841a02fad5e0f41d00d7b15bd327bb04651ca65bd5534e1e83fea32e9759befd", kill_on_drop: false }`
[INFO] [stdout] 841a02fad5e0f41d00d7b15bd327bb04651ca65bd5534e1e83fea32e9759befd