[INFO] cloning repository https://github.com/nilq/ketchup
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/nilq/ketchup" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnilq%2Fketchup", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnilq%2Fketchup'...
[INFO] [stderr] error: copy-fd: write returned: No space left on device
[INFO] [stderr] fatal: cannot copy '/usr/share/git-core/templates/hooks/pre-receive.sample' to '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnilq%2Fketchup/hooks/pre-receive.sample': No space left on device
[WARN] Retrying crate fetch in 3 seconds (attempt 1)
[INFO] cloning repository https://github.com/nilq/ketchup
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/nilq/ketchup" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnilq%2Fketchup", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnilq%2Fketchup'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a7015cf97d074264852cf4941843d1bc058d2501
[INFO] building nilq/ketchup against try#8b8eff55bd72abbb57167bc42222a7f91d41cb0d for pr-142134-abi-ast-error
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnilq%2Fketchup" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] [stderr] error: unable to write symref for refs/remotes/origin/HEAD: No space left on device
[INFO] [stderr] fatal: unable to update refs/remotes/origin/HEAD
[INFO] building nilq/ketchup against try#8b8eff55bd72abbb57167bc42222a7f91d41cb0d for pr-142134-abi-ast-error
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnilq%2Fketchup" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] [stderr] error: unable to write file src/language/syntax/mod.rs
[INFO] [stderr] fatal: cannot create directory at 'src/language/syntax/parser': No space left on device
[INFO] [stderr] warning: Clone succeeded, but checkout failed.
[INFO] [stderr] You can inspect what was checked out with 'git status'
[INFO] [stderr] and retry with 'git restore --source=HEAD :/'
[INFO] [stderr] 
[INFO] building nilq/ketchup against try#8b8eff55bd72abbb57167bc42222a7f91d41cb0d for pr-142134-abi-ast-error
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnilq%2Fketchup" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] [stderr] error: unable to write file src/language/mod.rs
[INFO] [stderr] fatal: cannot create directory at 'src/language/syntax': No space left on device
[INFO] [stderr] warning: Clone succeeded, but checkout failed.
[INFO] [stderr] You can inspect what was checked out with 'git status'
[INFO] [stderr] and retry with 'git restore --source=HEAD :/'
[INFO] [stderr] 
[INFO] building nilq/ketchup against try#8b8eff55bd72abbb57167bc42222a7f91d41cb0d for pr-142134-abi-ast-error
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnilq%2Fketchup" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/nilq/ketchup on toolchain 8b8eff55bd72abbb57167bc42222a7f91d41cb0d
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8b8eff55bd72abbb57167bc42222a7f91d41cb0d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/nilq/ketchup
[INFO] finished tweaking git repo https://github.com/nilq/ketchup
[INFO] tweaked toml for git repo https://github.com/nilq/ketchup written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/nilq/ketchup already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8b8eff55bd72abbb57167bc42222a7f91d41cb0d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+8b8eff55bd72abbb57167bc42222a7f91d41cb0d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] Error response from daemon: mkdir /var/lib/docker/overlay2/068906686a68b8e51110dbe5dbec20a606c39018c167e23be20c9ba5bc2c0ea0-init/merged: no space left on device
[INFO] building nilq/ketchup against try#8b8eff55bd72abbb57167bc42222a7f91d41cb0d for pr-142134-abi-ast-error
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnilq%2Fketchup" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/nilq/ketchup on toolchain 8b8eff55bd72abbb57167bc42222a7f91d41cb0d
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8b8eff55bd72abbb57167bc42222a7f91d41cb0d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/nilq/ketchup
[INFO] finished tweaking git repo https://github.com/nilq/ketchup
[INFO] tweaked toml for git repo https://github.com/nilq/ketchup written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/nilq/ketchup already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8b8eff55bd72abbb57167bc42222a7f91d41cb0d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+8b8eff55bd72abbb57167bc42222a7f91d41cb0d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d707fe1aaa7186e64f15cbb5d1dc0c03ee24e5501fb6fb113d27869ffa425f36
[INFO] running `Command { std: "docker" "start" "-a" "d707fe1aaa7186e64f15cbb5d1dc0c03ee24e5501fb6fb113d27869ffa425f36", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d707fe1aaa7186e64f15cbb5d1dc0c03ee24e5501fb6fb113d27869ffa425f36", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d707fe1aaa7186e64f15cbb5d1dc0c03ee24e5501fb6fb113d27869ffa425f36", kill_on_drop: false }`
[INFO] [stdout] d707fe1aaa7186e64f15cbb5d1dc0c03ee24e5501fb6fb113d27869ffa425f36
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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" "RUSTDOCFLAGS=--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:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+8b8eff55bd72abbb57167bc42222a7f91d41cb0d" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f649048ce031c0d2935f1883c665dbf37c5c1faa452089394c33db910e9677ba
[INFO] running `Command { std: "docker" "start" "-a" "f649048ce031c0d2935f1883c665dbf37c5c1faa452089394c33db910e9677ba", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024
[INFO] [stderr]    Compiling ketchup v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `flatten_branch` and `lex_branch`
[INFO] [stdout]   --> src/language/syntax/lexer/mod.rs:11:30
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub use self::lexer::{lexer, lex_branch, flatten_branch, process_branch};
[INFO] [stdout]    |                              ^^^^^^^^^^  ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::lexer`
[INFO] [stdout]  --> src/language/syntax/parser/mod.rs:9:9
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub use super::lexer;
[INFO] [stdout]   |         ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/language/vm/mod.rs:45:56
[INFO] [stdout]    |
[INFO] [stdout] 45 |                 Op::Add      => binary_op!(self, a, b, try!(a.add(b))),
[INFO] [stdout]    |                                                        ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/language/vm/mod.rs:46:56
[INFO] [stdout]    |
[INFO] [stdout] 46 |                 Op::Sub      => binary_op!(self, a, b, try!(a.sub(b))),
[INFO] [stdout]    |                                                        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/language/vm/mod.rs:47:56
[INFO] [stdout]    |
[INFO] [stdout] 47 |                 Op::Mul      => binary_op!(self, a, b, try!(a.mul(b))),
[INFO] [stdout]    |                                                        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/language/vm/mod.rs:48:56
[INFO] [stdout]    |
[INFO] [stdout] 48 |                 Op::Div      => binary_op!(self, a, b, try!(a.div(b))),
[INFO] [stdout]    |                                                        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/language/vm/mod.rs:108:43
[INFO] [stdout]     |
[INFO] [stdout] 108 | ...                   match try!(frame.run(scopes)) {
[INFO] [stdout]     |                             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Op`
[INFO] [stdout]   --> src/language/mod.rs:11:14
[INFO] [stdout]    |
[INFO] [stdout] 11 |     use vm::{Op, Value, Object, Native};
[INFO] [stdout]    |              ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/language/syntax/lexer/lexer.rs:116:23
[INFO] [stdout]     |
[INFO] [stdout] 116 |     matchers: Vec<Box<Matcher>>,
[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]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 116 |     matchers: Vec<Box<dyn Matcher>>,
[INFO] [stdout]     |                       +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/language/syntax/lexer/tokenizer.rs:41:28
[INFO] [stdout]    |
[INFO] [stdout] 41 |     pub fn new(items: &mut Iterator<Item = char>) -> Tokenizer {
[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: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 41 |     pub fn new(items: &mut dyn Iterator<Item = char>) -> Tokenizer {
[INFO] [stdout]    |                            +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/language/syntax/lexer/tokenizer.rs:112:49
[INFO] [stdout]     |
[INFO] [stdout] 112 |     pub fn try_match_token(&mut self, matcher: &Matcher) -> Option<Token> {
[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: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 112 |     pub fn try_match_token(&mut self, matcher: &dyn Matcher) -> Option<Token> {
[INFO] [stdout]     |                                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/language/syntax/lexer/lexer.rs:138:40
[INFO] [stdout]     |
[INFO] [stdout] 138 |     pub fn matchers(&self) -> &Vec<Box<Matcher>> {
[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: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 138 |     pub fn matchers(&self) -> &Vec<Box<dyn Matcher>> {
[INFO] [stdout]     |                                        +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/language/syntax/lexer/lexer.rs:142:52
[INFO] [stdout]     |
[INFO] [stdout] 142 |     pub fn matchers_mut(&mut self) -> &mut Vec<Box<Matcher>> {
[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: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 142 |     pub fn matchers_mut(&mut self) -> &mut Vec<Box<dyn Matcher>> {
[INFO] [stdout]     |                                                    +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]   --> src/language/mod.rs:50:9
[INFO] [stdout]    |
[INFO] [stdout] 48 |         panic!(s.join(" "));
[INFO] [stdout]    |         ------------------- any code following this expression is unreachable
[INFO] [stdout] 49 |
[INFO] [stdout] 50 |         Value::Nil
[INFO] [stdout]    |         ^^^^^^^^^^ unreachable expression
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `body` is never read
[INFO] [stdout]    --> src/language/syntax/parser/mod.rs:186:29
[INFO] [stdout]     |
[INFO] [stdout] 186 |                     let mut body: Option<Vec<Statement>> = None;
[INFO] [stdout]     |                             ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `t`
[INFO] [stdout]    --> src/language/syntax/parser/mod.rs:215:25
[INFO] [stdout]     |
[INFO] [stdout] 215 |                         t => body = Some(vec!(Statement::Expression(Box::new(self.expression())))),
[INFO] [stdout]     |                         ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]   --> src/language/vm/mod.rs:63:17
[INFO] [stdout]    |
[INFO] [stdout] 59 |                 Op::Name(ref n) => match scopes.get(n) {
[INFO] [stdout]    |                 --------------- matches all the relevant values
[INFO] [stdout] ...
[INFO] [stdout] 63 |                 Op::Name(ref n) => {
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^ no value can reach this
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]    --> src/language/vm/mod.rs:129:17
[INFO] [stdout]     |
[INFO] [stdout] 129 |                 _ => panic!("angery, not covered!?!"),
[INFO] [stdout]     |                 ^ no value can reach this
[INFO] [stdout]     |
[INFO] [stdout] note: multiple earlier patterns match some of the same values
[INFO] [stdout]    --> src/language/vm/mod.rs:129:17
[INFO] [stdout]     |
[INFO] [stdout] 44  |                 Op::Value(ref v) => self.stack.push(v.clone()),
[INFO] [stdout]     |                 ---------------- matches some of the same values
[INFO] [stdout] 45  |                 Op::Add      => binary_op!(self, a, b, try!(a.add(b))),
[INFO] [stdout]     |                 ------- matches some of the same values
[INFO] [stdout] 46  |                 Op::Sub      => binary_op!(self, a, b, try!(a.sub(b))),
[INFO] [stdout]     |                 ------- matches some of the same values
[INFO] [stdout] 47  |                 Op::Mul      => binary_op!(self, a, b, try!(a.mul(b))),
[INFO] [stdout]     |                 ------- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 129 |                 _ => panic!("angery, not covered!?!"),
[INFO] [stdout]     |                 ^ ...and 14 other patterns collectively make this unreachable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]    --> src/language/mod.rs:114:13
[INFO] [stdout]     |
[INFO] [stdout] 114 |             _ => panic!("unimplemented expression!") ,
[INFO] [stdout]     |             ^ no value can reach this
[INFO] [stdout]     |
[INFO] [stdout] note: multiple earlier patterns match some of the same values
[INFO] [stdout]    --> src/language/mod.rs:114:13
[INFO] [stdout]     |
[INFO] [stdout] 60  |             Expression::Atom(ref v) => script.push(Op::Value(v.clone())),
[INFO] [stdout]     |             ----------------------- matches some of the same values
[INFO] [stdout] 61  |             Expression::Operation(ref l, ref op, ref r) => {
[INFO] [stdout]     |             ------------------------------------------- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 77  |             Expression::Identifier(ref n) => script.push(Op::Name(n.clone())),
[INFO] [stdout]     |             ----------------------------- matches some of the same values
[INFO] [stdout] 78  |             Expression::Call(ref args)    => {
[INFO] [stdout]     |             -------------------------- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 114 |             _ => panic!("unimplemented expression!") ,
[INFO] [stdout]     |             ^ ...and 2 other patterns collectively make this unreachable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]    --> src/language/mod.rs:157:17
[INFO] [stdout]     |
[INFO] [stdout] 157 |                 _ => panic!("unstable/unimplemented statement!?")
[INFO] [stdout]     |                 ^ no value can reach this
[INFO] [stdout]     |
[INFO] [stdout] note: multiple earlier patterns match some of the same values
[INFO] [stdout]    --> src/language/mod.rs:157:17
[INFO] [stdout]     |
[INFO] [stdout] 130 |                 Statement::Expression(e)    => expression(&mut script, &e),
[INFO] [stdout]     |                 ------------------------ matches some of the same values
[INFO] [stdout] 131 |                 Statement::Block(ve)        => script.append(&mut statements(*ve)),
[INFO] [stdout]     |                 -------------------- matches some of the same values
[INFO] [stdout] 132 |                 Statement::Definition(n, e) => assignment(&mut script, &n, &*e),
[INFO] [stdout]     |                 --------------------------- matches some of the same values
[INFO] [stdout] 133 |                 Statement::If(cond, body)   => {
[INFO] [stdout]     |                 ------------------------- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 157 |                 _ => panic!("unstable/unimplemented statement!?")
[INFO] [stdout]     |                 ^ ...and 2 other patterns collectively make this unreachable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:65:9
[INFO] [stdout]    |
[INFO] [stdout] 65 |     let mut test = r#"
[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: function `test` is never used
[INFO] [stdout]   --> src/main.rs:61:4
[INFO] [stdout]    |
[INFO] [stdout] 61 | fn test() {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Block` is never constructed
[INFO] [stdout]  --> src/language/syntax/lexer/token.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub enum TokenType {
[INFO] [stdout]   |          --------- variant in this enum
[INFO] [stdout] 3 |     Block(Vec<Token>),
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `TokenType` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]  --> src/language/syntax/lexer/block_tree.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 |     Source(String),
[INFO] [stdout]   |     ------ ^^^^^^
[INFO] [stdout]   |     |
[INFO] [stdout]   |     field in this variant
[INFO] [stdout]   |
[INFO] [stdout]   = note: `ChunkValue` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]   |
[INFO] [stdout] 5 -     Source(String),
[INFO] [stdout] 5 +     Source(()),
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]  --> src/language/syntax/lexer/block_tree.rs:7:11
[INFO] [stdout]   |
[INFO] [stdout] 7 |     Block(Branch),
[INFO] [stdout]   |     ----- ^^^^^^
[INFO] [stdout]   |     |
[INFO] [stdout]   |     field in this variant
[INFO] [stdout]   |
[INFO] [stdout]   = note: `ChunkValue` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]   |
[INFO] [stdout] 7 -     Block(Branch),
[INFO] [stdout] 7 +     Block(()),
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Tokens` is never constructed
[INFO] [stdout]  --> src/language/syntax/lexer/block_tree.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub enum ChunkValue {
[INFO] [stdout]   |          ---------- variant in this enum
[INFO] [stdout] 5 |     Source(String),
[INFO] [stdout] 6 |     Tokens(Vec<Token>),
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `ChunkValue` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `value` is never read
[INFO] [stdout]   --> src/language/syntax/lexer/block_tree.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub struct Chunk {
[INFO] [stdout]    |            ----- field in this struct
[INFO] [stdout] 12 |     value: ChunkValue,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Chunk` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `value` is never used
[INFO] [stdout]   --> src/language/syntax/lexer/block_tree.rs:22:12
[INFO] [stdout]    |
[INFO] [stdout] 15 | impl Chunk {
[INFO] [stdout]    | ---------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 22 |     pub fn value(&self) -> &ChunkValue {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `lex_branch` is never used
[INFO] [stdout]   --> src/language/syntax/lexer/lexer.rs:80:8
[INFO] [stdout]    |
[INFO] [stdout] 80 | pub fn lex_branch(branch: &Branch) -> Branch {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `flatten_branch` is never used
[INFO] [stdout]   --> src/language/syntax/lexer/lexer.rs:98:8
[INFO] [stdout]    |
[INFO] [stdout] 98 | pub fn flatten_branch(branch: &Branch) -> Vec<Token> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `process_branch` is never used
[INFO] [stdout]    --> src/language/syntax/lexer/lexer.rs:110:8
[INFO] [stdout]     |
[INFO] [stdout] 110 | pub fn process_branch(branch: &Branch) -> Vec<Token> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Block` is never constructed
[INFO] [stdout]   --> src/language/syntax/parser/ast.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub enum Statement {
[INFO] [stdout]    |          --------- variant in this enum
[INFO] [stdout] 15 |     Block(Box<Vec<Statement>>),
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Statement` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Jump` is never constructed
[INFO] [stdout]   --> src/language/vm/op.rs:21:5
[INFO] [stdout]    |
[INFO] [stdout] 4  | pub enum Op {
[INFO] [stdout]    |          -- variant in this enum
[INFO] [stdout] ...
[INFO] [stdout] 21 |     Jump(i32),
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Op` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:53:17
[INFO] [stdout]    |
[INFO] [stdout] 53 |                 vm.run(&mut scopes);
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 53 |                 let _ = vm.run(&mut scopes);
[INFO] [stdout]    |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> src/main.rs:56:30
[INFO] [stdout]    |
[INFO] [stdout] 56 |             Err(e) => panic!(e),
[INFO] [stdout]    |                              ^
[INFO] [stdout]    |
[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: `#[warn(non_fmt_panics)]` on by default
[INFO] [stdout] help: add a "{}" format string to `Display` the message
[INFO] [stdout]    |
[INFO] [stdout] 56 |             Err(e) => panic!("{}", e),
[INFO] [stdout]    |                              +++++
[INFO] [stdout] help: or use std::panic::panic_any instead
[INFO] [stdout]    |
[INFO] [stdout] 56 -             Err(e) => panic!(e),
[INFO] [stdout] 56 +             Err(e) => std::panic::panic_any(e),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:92:5
[INFO] [stdout]    |
[INFO] [stdout] 92 |     vm.run(&mut scopes);
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 92 |     let _ = vm.run(&mut scopes);
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> src/language/syntax/lexer/block_tree.rs:48:24
[INFO] [stdout]    |
[INFO] [stdout] 48 |     pub fn new(source: &str, current_line: usize) -> BlockTree {
[INFO] [stdout]    |                        ^^^^                          --------- the lifetime gets resolved as `'_`
[INFO] [stdout]    |                        |
[INFO] [stdout]    |                        this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]    |
[INFO] [stdout] 48 |     pub fn new(source: &str, current_line: usize) -> BlockTree<'_> {
[INFO] [stdout]    |                                                               ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> src/language/mod.rs:48:16
[INFO] [stdout]    |
[INFO] [stdout] 48 |         panic!(s.join(" "));
[INFO] [stdout]    |                ^^^^^^^^^^^
[INFO] [stdout]    |
[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] help: add a "{}" format string to `Display` the message
[INFO] [stdout]    |
[INFO] [stdout] 48 |         panic!("{}", s.join(" "));
[INFO] [stdout]    |                +++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.94s
[INFO] running `Command { std: "docker" "inspect" "f649048ce031c0d2935f1883c665dbf37c5c1faa452089394c33db910e9677ba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f649048ce031c0d2935f1883c665dbf37c5c1faa452089394c33db910e9677ba", kill_on_drop: false }`
[INFO] [stdout] f649048ce031c0d2935f1883c665dbf37c5c1faa452089394c33db910e9677ba
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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" "RUSTDOCFLAGS=--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:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+8b8eff55bd72abbb57167bc42222a7f91d41cb0d" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a6bede9d44315ff0aafaba8010b6f294c6bc9711160d33e9fbaf48f4946a10af
[INFO] running `Command { std: "docker" "start" "-a" "a6bede9d44315ff0aafaba8010b6f294c6bc9711160d33e9fbaf48f4946a10af", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024
[INFO] [stderr]    Compiling ketchup v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `flatten_branch` and `lex_branch`
[INFO] [stdout]   --> src/language/syntax/lexer/mod.rs:11:30
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub use self::lexer::{lexer, lex_branch, flatten_branch, process_branch};
[INFO] [stdout]    |                              ^^^^^^^^^^  ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::lexer`
[INFO] [stdout]  --> src/language/syntax/parser/mod.rs:9:9
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub use super::lexer;
[INFO] [stdout]   |         ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/language/vm/mod.rs:45:56
[INFO] [stdout]    |
[INFO] [stdout] 45 |                 Op::Add      => binary_op!(self, a, b, try!(a.add(b))),
[INFO] [stdout]    |                                                        ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/language/vm/mod.rs:46:56
[INFO] [stdout]    |
[INFO] [stdout] 46 |                 Op::Sub      => binary_op!(self, a, b, try!(a.sub(b))),
[INFO] [stdout]    |                                                        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/language/vm/mod.rs:47:56
[INFO] [stdout]    |
[INFO] [stdout] 47 |                 Op::Mul      => binary_op!(self, a, b, try!(a.mul(b))),
[INFO] [stdout]    |                                                        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/language/vm/mod.rs:48:56
[INFO] [stdout]    |
[INFO] [stdout] 48 |                 Op::Div      => binary_op!(self, a, b, try!(a.div(b))),
[INFO] [stdout]    |                                                        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/language/vm/mod.rs:108:43
[INFO] [stdout]     |
[INFO] [stdout] 108 | ...                   match try!(frame.run(scopes)) {
[INFO] [stdout]     |                             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Op`
[INFO] [stdout]   --> src/language/mod.rs:11:14
[INFO] [stdout]    |
[INFO] [stdout] 11 |     use vm::{Op, Value, Object, Native};
[INFO] [stdout]    |              ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/language/syntax/lexer/lexer.rs:116:23
[INFO] [stdout]     |
[INFO] [stdout] 116 |     matchers: Vec<Box<Matcher>>,
[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]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 116 |     matchers: Vec<Box<dyn Matcher>>,
[INFO] [stdout]     |                       +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/language/syntax/lexer/tokenizer.rs:41:28
[INFO] [stdout]    |
[INFO] [stdout] 41 |     pub fn new(items: &mut Iterator<Item = char>) -> Tokenizer {
[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: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 41 |     pub fn new(items: &mut dyn Iterator<Item = char>) -> Tokenizer {
[INFO] [stdout]    |                            +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/language/syntax/lexer/tokenizer.rs:112:49
[INFO] [stdout]     |
[INFO] [stdout] 112 |     pub fn try_match_token(&mut self, matcher: &Matcher) -> Option<Token> {
[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: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 112 |     pub fn try_match_token(&mut self, matcher: &dyn Matcher) -> Option<Token> {
[INFO] [stdout]     |                                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/language/syntax/lexer/lexer.rs:138:40
[INFO] [stdout]     |
[INFO] [stdout] 138 |     pub fn matchers(&self) -> &Vec<Box<Matcher>> {
[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: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 138 |     pub fn matchers(&self) -> &Vec<Box<dyn Matcher>> {
[INFO] [stdout]     |                                        +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/language/syntax/lexer/lexer.rs:142:52
[INFO] [stdout]     |
[INFO] [stdout] 142 |     pub fn matchers_mut(&mut self) -> &mut Vec<Box<Matcher>> {
[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: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 142 |     pub fn matchers_mut(&mut self) -> &mut Vec<Box<dyn Matcher>> {
[INFO] [stdout]     |                                                    +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]   --> src/language/mod.rs:50:9
[INFO] [stdout]    |
[INFO] [stdout] 48 |         panic!(s.join(" "));
[INFO] [stdout]    |         ------------------- any code following this expression is unreachable
[INFO] [stdout] 49 |
[INFO] [stdout] 50 |         Value::Nil
[INFO] [stdout]    |         ^^^^^^^^^^ unreachable expression
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `body` is never read
[INFO] [stdout]    --> src/language/syntax/parser/mod.rs:186:29
[INFO] [stdout]     |
[INFO] [stdout] 186 |                     let mut body: Option<Vec<Statement>> = None;
[INFO] [stdout]     |                             ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `t`
[INFO] [stdout]    --> src/language/syntax/parser/mod.rs:215:25
[INFO] [stdout]     |
[INFO] [stdout] 215 |                         t => body = Some(vec!(Statement::Expression(Box::new(self.expression())))),
[INFO] [stdout]     |                         ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]   --> src/language/vm/mod.rs:63:17
[INFO] [stdout]    |
[INFO] [stdout] 59 |                 Op::Name(ref n) => match scopes.get(n) {
[INFO] [stdout]    |                 --------------- matches all the relevant values
[INFO] [stdout] ...
[INFO] [stdout] 63 |                 Op::Name(ref n) => {
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^ no value can reach this
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]    --> src/language/vm/mod.rs:129:17
[INFO] [stdout]     |
[INFO] [stdout] 129 |                 _ => panic!("angery, not covered!?!"),
[INFO] [stdout]     |                 ^ no value can reach this
[INFO] [stdout]     |
[INFO] [stdout] note: multiple earlier patterns match some of the same values
[INFO] [stdout]    --> src/language/vm/mod.rs:129:17
[INFO] [stdout]     |
[INFO] [stdout] 44  |                 Op::Value(ref v) => self.stack.push(v.clone()),
[INFO] [stdout]     |                 ---------------- matches some of the same values
[INFO] [stdout] 45  |                 Op::Add      => binary_op!(self, a, b, try!(a.add(b))),
[INFO] [stdout]     |                 ------- matches some of the same values
[INFO] [stdout] 46  |                 Op::Sub      => binary_op!(self, a, b, try!(a.sub(b))),
[INFO] [stdout]     |                 ------- matches some of the same values
[INFO] [stdout] 47  |                 Op::Mul      => binary_op!(self, a, b, try!(a.mul(b))),
[INFO] [stdout]     |                 ------- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 129 |                 _ => panic!("angery, not covered!?!"),
[INFO] [stdout]     |                 ^ ...and 14 other patterns collectively make this unreachable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]    --> src/language/mod.rs:114:13
[INFO] [stdout]     |
[INFO] [stdout] 114 |             _ => panic!("unimplemented expression!") ,
[INFO] [stdout]     |             ^ no value can reach this
[INFO] [stdout]     |
[INFO] [stdout] note: multiple earlier patterns match some of the same values
[INFO] [stdout]    --> src/language/mod.rs:114:13
[INFO] [stdout]     |
[INFO] [stdout] 60  |             Expression::Atom(ref v) => script.push(Op::Value(v.clone())),
[INFO] [stdout]     |             ----------------------- matches some of the same values
[INFO] [stdout] 61  |             Expression::Operation(ref l, ref op, ref r) => {
[INFO] [stdout]     |             ------------------------------------------- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 77  |             Expression::Identifier(ref n) => script.push(Op::Name(n.clone())),
[INFO] [stdout]     |             ----------------------------- matches some of the same values
[INFO] [stdout] 78  |             Expression::Call(ref args)    => {
[INFO] [stdout]     |             -------------------------- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 114 |             _ => panic!("unimplemented expression!") ,
[INFO] [stdout]     |             ^ ...and 2 other patterns collectively make this unreachable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]    --> src/language/mod.rs:157:17
[INFO] [stdout]     |
[INFO] [stdout] 157 |                 _ => panic!("unstable/unimplemented statement!?")
[INFO] [stdout]     |                 ^ no value can reach this
[INFO] [stdout]     |
[INFO] [stdout] note: multiple earlier patterns match some of the same values
[INFO] [stdout]    --> src/language/mod.rs:157:17
[INFO] [stdout]     |
[INFO] [stdout] 130 |                 Statement::Expression(e)    => expression(&mut script, &e),
[INFO] [stdout]     |                 ------------------------ matches some of the same values
[INFO] [stdout] 131 |                 Statement::Block(ve)        => script.append(&mut statements(*ve)),
[INFO] [stdout]     |                 -------------------- matches some of the same values
[INFO] [stdout] 132 |                 Statement::Definition(n, e) => assignment(&mut script, &n, &*e),
[INFO] [stdout]     |                 --------------------------- matches some of the same values
[INFO] [stdout] 133 |                 Statement::If(cond, body)   => {
[INFO] [stdout]     |                 ------------------------- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 157 |                 _ => panic!("unstable/unimplemented statement!?")
[INFO] [stdout]     |                 ^ ...and 2 other patterns collectively make this unreachable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:65:9
[INFO] [stdout]    |
[INFO] [stdout] 65 |     let mut test = r#"
[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: function `test` is never used
[INFO] [stdout]   --> src/main.rs:61:4
[INFO] [stdout]    |
[INFO] [stdout] 61 | fn test() {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Block` is never constructed
[INFO] [stdout]  --> src/language/syntax/lexer/token.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub enum TokenType {
[INFO] [stdout]   |          --------- variant in this enum
[INFO] [stdout] 3 |     Block(Vec<Token>),
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `TokenType` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]  --> src/language/syntax/lexer/block_tree.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 |     Source(String),
[INFO] [stdout]   |     ------ ^^^^^^
[INFO] [stdout]   |     |
[INFO] [stdout]   |     field in this variant
[INFO] [stdout]   |
[INFO] [stdout]   = note: `ChunkValue` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]   |
[INFO] [stdout] 5 -     Source(String),
[INFO] [stdout] 5 +     Source(()),
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]  --> src/language/syntax/lexer/block_tree.rs:7:11
[INFO] [stdout]   |
[INFO] [stdout] 7 |     Block(Branch),
[INFO] [stdout]   |     ----- ^^^^^^
[INFO] [stdout]   |     |
[INFO] [stdout]   |     field in this variant
[INFO] [stdout]   |
[INFO] [stdout]   = note: `ChunkValue` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]   |
[INFO] [stdout] 7 -     Block(Branch),
[INFO] [stdout] 7 +     Block(()),
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Tokens` is never constructed
[INFO] [stdout]  --> src/language/syntax/lexer/block_tree.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub enum ChunkValue {
[INFO] [stdout]   |          ---------- variant in this enum
[INFO] [stdout] 5 |     Source(String),
[INFO] [stdout] 6 |     Tokens(Vec<Token>),
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `ChunkValue` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `value` is never read
[INFO] [stdout]   --> src/language/syntax/lexer/block_tree.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub struct Chunk {
[INFO] [stdout]    |            ----- field in this struct
[INFO] [stdout] 12 |     value: ChunkValue,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Chunk` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `value` is never used
[INFO] [stdout]   --> src/language/syntax/lexer/block_tree.rs:22:12
[INFO] [stdout]    |
[INFO] [stdout] 15 | impl Chunk {
[INFO] [stdout]    | ---------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 22 |     pub fn value(&self) -> &ChunkValue {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `lex_branch` is never used
[INFO] [stdout]   --> src/language/syntax/lexer/lexer.rs:80:8
[INFO] [stdout]    |
[INFO] [stdout] 80 | pub fn lex_branch(branch: &Branch) -> Branch {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `flatten_branch` is never used
[INFO] [stdout]   --> src/language/syntax/lexer/lexer.rs:98:8
[INFO] [stdout]    |
[INFO] [stdout] 98 | pub fn flatten_branch(branch: &Branch) -> Vec<Token> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `process_branch` is never used
[INFO] [stdout]    --> src/language/syntax/lexer/lexer.rs:110:8
[INFO] [stdout]     |
[INFO] [stdout] 110 | pub fn process_branch(branch: &Branch) -> Vec<Token> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Block` is never constructed
[INFO] [stdout]   --> src/language/syntax/parser/ast.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub enum Statement {
[INFO] [stdout]    |          --------- variant in this enum
[INFO] [stdout] 15 |     Block(Box<Vec<Statement>>),
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Statement` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Jump` is never constructed
[INFO] [stdout]   --> src/language/vm/op.rs:21:5
[INFO] [stdout]    |
[INFO] [stdout] 4  | pub enum Op {
[INFO] [stdout]    |          -- variant in this enum
[INFO] [stdout] ...
[INFO] [stdout] 21 |     Jump(i32),
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Op` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:53:17
[INFO] [stdout]    |
[INFO] [stdout] 53 |                 vm.run(&mut scopes);
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 53 |                 let _ = vm.run(&mut scopes);
[INFO] [stdout]    |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> src/main.rs:56:30
[INFO] [stdout]    |
[INFO] [stdout] 56 |             Err(e) => panic!(e),
[INFO] [stdout]    |                              ^
[INFO] [stdout]    |
[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: `#[warn(non_fmt_panics)]` on by default
[INFO] [stdout] help: add a "{}" format string to `Display` the message
[INFO] [stdout]    |
[INFO] [stdout] 56 |             Err(e) => panic!("{}", e),
[INFO] [stdout]    |                              +++++
[INFO] [stdout] help: or use std::panic::panic_any instead
[INFO] [stdout]    |
[INFO] [stdout] 56 -             Err(e) => panic!(e),
[INFO] [stdout] 56 +             Err(e) => std::panic::panic_any(e),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:92:5
[INFO] [stdout]    |
[INFO] [stdout] 92 |     vm.run(&mut scopes);
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 92 |     let _ = vm.run(&mut scopes);
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> src/language/syntax/lexer/block_tree.rs:48:24
[INFO] [stdout]    |
[INFO] [stdout] 48 |     pub fn new(source: &str, current_line: usize) -> BlockTree {
[INFO] [stdout]    |                        ^^^^                          --------- the lifetime gets resolved as `'_`
[INFO] [stdout]    |                        |
[INFO] [stdout]    |                        this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]    |
[INFO] [stdout] 48 |     pub fn new(source: &str, current_line: usize) -> BlockTree<'_> {
[INFO] [stdout]    |                                                               ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> src/language/mod.rs:48:16
[INFO] [stdout]    |
[INFO] [stdout] 48 |         panic!(s.join(" "));
[INFO] [stdout]    |                ^^^^^^^^^^^
[INFO] [stdout]    |
[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] help: add a "{}" format string to `Display` the message
[INFO] [stdout]    |
[INFO] [stdout] 48 |         panic!("{}", s.join(" "));
[INFO] [stdout]    |                +++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.50s
[INFO] running `Command { std: "docker" "inspect" "a6bede9d44315ff0aafaba8010b6f294c6bc9711160d33e9fbaf48f4946a10af", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a6bede9d44315ff0aafaba8010b6f294c6bc9711160d33e9fbaf48f4946a10af", kill_on_drop: false }`
[INFO] [stdout] a6bede9d44315ff0aafaba8010b6f294c6bc9711160d33e9fbaf48f4946a10af