[INFO] cloning repository https://github.com/rainbowlang/rainbow
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/rainbowlang/rainbow" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frainbowlang%2Frainbow", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frainbowlang%2Frainbow'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8b6accd772c561d31c78cad08c3659651bab9b47
[INFO] testing rainbowlang/rainbow against master#a77da2d454e6caa227a85b16410b95f93495e7e0 for pr-91031
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frainbowlang%2Frainbow" "/workspace/builds/worker-8/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/rainbowlang/rainbow on toolchain a77da2d454e6caa227a85b16410b95f93495e7e0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/rainbowlang/rainbow
[INFO] finished tweaking git repo https://github.com/rainbowlang/rainbow
[INFO] tweaked toml for git repo https://github.com/rainbowlang/rainbow written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/rainbowlang/rainbow already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "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-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "metadata" "--no-deps" "--format-version=1", 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] 0f6986b5ca233e425a359133d88eb011881e1881793dd3b111167953756b1009
[INFO] running `Command { std: "docker" "start" "-a" "0f6986b5ca233e425a359133d88eb011881e1881793dd3b111167953756b1009", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0f6986b5ca233e425a359133d88eb011881e1881793dd3b111167953756b1009", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0f6986b5ca233e425a359133d88eb011881e1881793dd3b111167953756b1009", kill_on_drop: false }`
[INFO] [stdout] 0f6986b5ca233e425a359133d88eb011881e1881793dd3b111167953756b1009
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f71a245374ebb0426efd997c3a07eaef32abba20c4fd052283689b99f5ff493f
[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" "f71a245374ebb0426efd997c3a07eaef32abba20c4fd052283689b99f5ff493f", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.45
[INFO] [stderr]    Compiling snowflake v1.3.0
[INFO] [stderr]    Compiling pest v1.0.6
[INFO] [stderr]    Compiling unicode-width v0.1.5
[INFO] [stderr]    Compiling serde v1.0.82
[INFO] [stderr]    Compiling syn v0.11.11
[INFO] [stderr]    Compiling syn v0.15.23
[INFO] [stderr]    Compiling id_tree v1.3.0
[INFO] [stderr]    Compiling nix v0.5.1
[INFO] [stderr]    Compiling pest_derive v1.0.8
[INFO] [stderr]    Compiling rustyline v1.0.0
[INFO] [stderr]    Compiling serde_derive v1.0.82
[INFO] [stderr]    Compiling rainbow_core v0.1.0 (/opt/rustwide/workdir/rainbow_core)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> rainbow_core/src/function_builder.rs:12:26
[INFO] [stdout]    |
[INFO] [stdout] 12 |     callback: Option<Box<Fn(Apply<V>, &mut Machine<V>) -> Result<V, V::Error>>>,
[INFO] [stdout]    |                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(Apply<V>, &mut Machine<V>) -> Result<V, V::Error>`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) 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] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> rainbow_core/src/function_builder.rs:93:17
[INFO] [stdout]    |
[INFO] [stdout] 93 |             Box<Fn(Apply<V>, &mut Machine<V>) -> Result<V, V::Error>>,
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(Apply<V>, &mut Machine<V>) -> Result<V, V::Error>`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) 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] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> rainbow_core/src/namespace.rs:26:37
[INFO] [stdout]    |
[INFO] [stdout] 26 |     callbacks: HashMap<ArenaId, Box<Fn(Apply<V>, &mut Machine<V>) -> Result<V, V::Error>>>,
[INFO] [stdout]    |                                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(Apply<V>, &mut Machine<V>) -> Result<V, V::Error>`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) 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] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> rainbow_core/src/namespace.rs:87:22
[INFO] [stdout]    |
[INFO] [stdout] 87 |     ) -> Option<&Box<Fn(Apply<V>, &mut Machine<V>) -> Result<V, V::Error>>> {
[INFO] [stdout]    |                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(Apply<V>, &mut Machine<V>) -> Result<V, V::Error>`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) 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] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> rainbow_core/src/namespace.rs:102:23
[INFO] [stdout]     |
[INFO] [stdout] 102 |         callback: Box<Fn(Apply<V>, &mut Machine<V>) -> Result<V, V::Error>>,
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(Apply<V>, &mut Machine<V>) -> Result<V, V::Error>`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2018) 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] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Prim` is imported redundantly
[INFO] [stdout]   --> rainbow_core/src/standalone.rs:20:13
[INFO] [stdout]    |
[INFO] [stdout] 6  | use crate::primitive::Prim;
[INFO] [stdout]    |     ---------------------- the item `Prim` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 20 |         use crate::primitive::Prim;
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: ambiguous associated item
[INFO] [stdout]   --> rainbow_core/src/standalone.rs:93:34
[INFO] [stdout]    |
[INFO] [stdout] 93 |     fn try_list(&self) -> Result<Self::List, String> {
[INFO] [stdout]    |                                  ^^^^^^^^^^ help: use fully-qualified syntax: `<standalone::Value as Value>::List`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[deny(ambiguous_associated_items)]` on by default
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]    = note: for more information, see issue #57644 <https://github.com/rust-lang/rust/issues/57644>
[INFO] [stdout] note: `List` could refer to the variant defined here
[INFO] [stdout]   --> rainbow_core/src/standalone.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 |     List(Vec<Value>),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] note: `List` could also refer to the associated type defined here
[INFO] [stdout]   --> rainbow_core/src/interpreter/value.rs:30:5
[INFO] [stdout]    |
[INFO] [stdout] 30 |     type List: List<Self>;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: ambiguous associated item
[INFO] [stdout]    --> rainbow_core/src/standalone.rs:100:36
[INFO] [stdout]     |
[INFO] [stdout] 100 |     fn try_record(&self) -> Result<Self::Record, String> {
[INFO] [stdout]     |                                    ^^^^^^^^^^^^ help: use fully-qualified syntax: `<standalone::Value as Value>::Record`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #57644 <https://github.com/rust-lang/rust/issues/57644>
[INFO] [stdout] note: `Record` could refer to the variant defined here
[INFO] [stdout]    --> rainbow_core/src/standalone.rs:14:5
[INFO] [stdout]     |
[INFO] [stdout] 14  |     Record(HashMap<String, Value>),
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] note: `Record` could also refer to the associated type defined here
[INFO] [stdout]    --> rainbow_core/src/interpreter/value.rs:31:5
[INFO] [stdout]     |
[INFO] [stdout] 31  |     type Record: Record<Self>;
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `core::str::<impl str>::trim_right_matches`: superseded by `trim_end_matches`
[INFO] [stdout]   --> rainbow_core/src/frontend/implicit_blocks.rs:18:22
[INFO] [stdout]    |
[INFO] [stdout] 18 |                     .trim_right_matches(':');
[INFO] [stdout]    |                      ^^^^^^^^^^^^^^^^^^ help: replace the use of the deprecated associated function: `trim_end_matches`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `core::str::<impl str>::trim_right_matches`: superseded by `trim_end_matches`
[INFO] [stdout]    --> rainbow_core/src/typing/constraint_generator.rs:172:22
[INFO] [stdout]     |
[INFO] [stdout] 172 |                     .trim_right_matches(':');
[INFO] [stdout]     |                      ^^^^^^^^^^^^^^^^^^ help: replace the use of the deprecated associated function: `trim_end_matches`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `lex`
[INFO] [stdout]   --> rainbow_core/src/frontend/lexer.rs:37:8
[INFO] [stdout]    |
[INFO] [stdout] 37 | pub fn lex<'i>(input: &'i str) -> Lexer<'i> {
[INFO] [stdout]    |        ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> rainbow_core/src/frontend/syntax_tree.rs:149:29
[INFO] [stdout]     |
[INFO] [stdout] 149 |                 _ => panic!(format!("grammar rule `bool` rule matched {:?}", pair)),
[INFO] [stdout]     |                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_fmt_panics)]` on by default
[INFO] [stdout]     = note: this usage of panic!() is deprecated; it will be a hard error in Rust 2021
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stdout]     = note: the panic!() macro supports formatting, so there's no need for the format!() macro here
[INFO] [stdout] help: remove the `format!(..)` macro call
[INFO] [stdout]     |
[INFO] [stdout] 149 -                 _ => panic!(format!("grammar rule `bool` rule matched {:?}", pair)),
[INFO] [stdout] 149 +                 _ => panic!("grammar rule `bool` rule matched {:?}", pair),
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors; 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rainbow_core` due to 3 previous errors; 10 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "f71a245374ebb0426efd997c3a07eaef32abba20c4fd052283689b99f5ff493f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f71a245374ebb0426efd997c3a07eaef32abba20c4fd052283689b99f5ff493f", kill_on_drop: false }`
[INFO] [stdout] f71a245374ebb0426efd997c3a07eaef32abba20c4fd052283689b99f5ff493f