[INFO] cloning repository https://github.com/panicbit/ross
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/panicbit/ross" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpanicbit%2Fross", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpanicbit%2Fross'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7b21213448e2d2148eddbcb84cfbed90e28e0737
[INFO] checking panicbit/ross against master#1f12b9b0fdbe735968ac002792a720f0ba4faca6 for crater-rollup-uwu
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpanicbit%2Fross" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/panicbit/ross on toolchain 1f12b9b0fdbe735968ac002792a720f0ba4faca6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/panicbit/ross
[INFO] finished tweaking git repo https://github.com/panicbit/ross
[INFO] tweaked toml for git repo https://github.com/panicbit/ross written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/panicbit/ross 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" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2021
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded rustc-demangle v0.1.5
[INFO] [stderr]   Downloaded libc v0.2.35
[INFO] [stderr]   Downloaded winapi v0.3.3
[INFO] [stderr]   Downloaded winapi-i686-pc-windows-gnu v0.3.2
[INFO] [stderr]   Downloaded winapi-x86_64-pc-windows-gnu v0.3.2
[INFO] [stderr]   Downloaded pest_derive v1.0.1
[INFO] [stderr]   Downloaded pest v1.0.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c5625b58207022421f107596c1a4dfe6324dd3ce05bc66388fa3b4919b8221a0
[INFO] running `Command { std: "docker" "start" "-a" "c5625b58207022421f107596c1a4dfe6324dd3ce05bc66388fa3b4919b8221a0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c5625b58207022421f107596c1a4dfe6324dd3ce05bc66388fa3b4919b8221a0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c5625b58207022421f107596c1a4dfe6324dd3ce05bc66388fa3b4919b8221a0", kill_on_drop: false }`
[INFO] [stdout] c5625b58207022421f107596c1a4dfe6324dd3ce05bc66388fa3b4919b8221a0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 715a7de3eb9bd06420c87483283e7a8e41ff393cefee0eedf509fca059356ee6
[INFO] running `Command { std: "docker" "start" "-a" "715a7de3eb9bd06420c87483283e7a8e41ff393cefee0eedf509fca059356ee6", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2021
[INFO] [stderr]    Compiling unicode-xid v0.0.4
[INFO] [stderr]    Compiling quote v0.3.15
[INFO] [stderr]    Compiling cc v1.0.4
[INFO] [stderr]     Checking libc v0.2.35
[INFO] [stderr]     Checking cfg-if v0.1.2
[INFO] [stderr]     Checking rustc-demangle v0.1.5
[INFO] [stderr]     Checking either v1.4.0
[INFO] [stderr]    Compiling pest v1.0.1
[INFO] [stderr]    Compiling synom v0.11.3
[INFO] [stderr]     Checking itertools v0.7.6
[INFO] [stderr]     Checking matches v0.1.6
[INFO] [stderr]    Compiling syn v0.11.11
[INFO] [stderr]    Compiling syn v0.10.8
[INFO] [stderr]    Compiling backtrace-sys v0.1.16
[INFO] [stderr]    Compiling synstructure v0.6.1
[INFO] [stderr]    Compiling pest_derive v1.0.1
[INFO] [stderr]    Compiling failure_derive v0.1.1
[INFO] [stderr]     Checking backtrace v0.3.5
[INFO] [stderr]     Checking failure v0.1.1
[INFO] [stderr]     Checking ross v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused `#[macro_use]` import
[INFO] [stdout]  --> src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #[macro_use] extern crate pest;
[INFO] [stdout]   | ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ast::*`
[INFO] [stdout]  --> src/tests.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use ast::*;
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/ast.rs:121:49
[INFO] [stdout]     |
[INFO] [stdout] 121 |     pub fn declared_idents<'a>(&'a self) -> Box<Iterator<Item=&'a Ident> + 'a> {
[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 an object-safe trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 121 |     pub fn declared_idents<'a>(&'a self) -> Box<dyn Iterator<Item=&'a Ident> + 'a> {
[INFO] [stdout]     |                                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/ast.rs:121:49
[INFO] [stdout]     |
[INFO] [stdout] 121 |     pub fn declared_idents<'a>(&'a self) -> Box<Iterator<Item=&'a Ident> + 'a> {
[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 an object-safe trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 121 |     pub fn declared_idents<'a>(&'a self) -> Box<dyn Iterator<Item=&'a Ident> + 'a> {
[INFO] [stdout]     |                                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]   --> src/parser.rs:32:5
[INFO] [stdout]    |
[INFO] [stdout] 30 |     panic!("{:#?}", module);
[INFO] [stdout]    |     ----------------------- any code following this expression is unreachable
[INFO] [stdout] 31 |     
[INFO] [stdout] 32 |     Ok(module)
[INFO] [stdout]    |     ^^^^^^^^^^ unreachable expression
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]   --> src/parser.rs:32:5
[INFO] [stdout]    |
[INFO] [stdout] 30 |     panic!("{:#?}", module);
[INFO] [stdout]    |     ----------------------- any code following this expression is unreachable
[INFO] [stdout] 31 |     
[INFO] [stdout] 32 |     Ok(module)
[INFO] [stdout]    |     ^^^^^^^^^^ unreachable expression
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]   --> src/lib.rs:17:4
[INFO] [stdout]    |
[INFO] [stdout] 17 | fn main() {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Scope` is never constructed
[INFO] [stdout]  --> src/trans.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct Scope {
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `RegSet` is never constructed
[INFO] [stdout]  --> src/trans.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | struct RegSet {
[INFO] [stdout]   |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `alloc` are never used
[INFO] [stdout]   --> src/trans.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 12 | impl RegSet {
[INFO] [stdout]    | ----------- associated items in this implementation
[INFO] [stdout] 13 |     fn new(available: usize) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 17 |     fn alloc(&mut self) -> Option<usize> {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `module` is never used
[INFO] [stdout]  --> src/validate.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub fn module(items: &[Item]) -> Result<(), Error> {
[INFO] [stdout]   |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `static_blocks_are_unique` is never used
[INFO] [stdout]   --> src/validate.rs:12:15
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub(crate) fn static_blocks_are_unique(items: &[Item]) -> Result<(), Error> {
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `item_names_are_unique` is never used
[INFO] [stdout]   --> src/validate.rs:27:15
[INFO] [stdout]    |
[INFO] [stdout] 27 | pub(crate) fn item_names_are_unique(items: &[Item]) -> Result<(), Error> {
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `functions_dont_recur` is never used
[INFO] [stdout]   --> src/validate.rs:42:15
[INFO] [stdout]    |
[INFO] [stdout] 42 | pub(crate) fn functions_dont_recur(items: &[Item]) -> Result<(), Error> {
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `ConstExpr` is never used
[INFO] [stdout]  --> src/picasso.rs:2:10
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub enum ConstExpr {
[INFO] [stdout]   |          ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Register` is never used
[INFO] [stdout]  --> src/picasso.rs:7:10
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub enum Register {
[INFO] [stdout]   |          ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Ref` is never constructed
[INFO] [stdout]   --> src/picasso.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 13 | struct Ref {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Builder` is never constructed
[INFO] [stdout]   --> src/picasso.rs:17:8
[INFO] [stdout]    |
[INFO] [stdout] 17 | struct Builder {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 15 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Scope` is never constructed
[INFO] [stdout]  --> src/trans.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct Scope {
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `RegSet` is never constructed
[INFO] [stdout]  --> src/trans.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | struct RegSet {
[INFO] [stdout]   |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `alloc` are never used
[INFO] [stdout]   --> src/trans.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 12 | impl RegSet {
[INFO] [stdout]    | ----------- associated items in this implementation
[INFO] [stdout] 13 |     fn new(available: usize) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 17 |     fn alloc(&mut self) -> Option<usize> {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `module` is never used
[INFO] [stdout]  --> src/validate.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub fn module(items: &[Item]) -> Result<(), Error> {
[INFO] [stdout]   |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `static_blocks_are_unique` is never used
[INFO] [stdout]   --> src/validate.rs:12:15
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub(crate) fn static_blocks_are_unique(items: &[Item]) -> Result<(), Error> {
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `item_names_are_unique` is never used
[INFO] [stdout]   --> src/validate.rs:27:15
[INFO] [stdout]    |
[INFO] [stdout] 27 | pub(crate) fn item_names_are_unique(items: &[Item]) -> Result<(), Error> {
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `functions_dont_recur` is never used
[INFO] [stdout]   --> src/validate.rs:42:15
[INFO] [stdout]    |
[INFO] [stdout] 42 | pub(crate) fn functions_dont_recur(items: &[Item]) -> Result<(), Error> {
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `ConstExpr` is never used
[INFO] [stdout]  --> src/picasso.rs:2:10
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub enum ConstExpr {
[INFO] [stdout]   |          ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Register` is never used
[INFO] [stdout]  --> src/picasso.rs:7:10
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub enum Register {
[INFO] [stdout]   |          ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Ref` is never constructed
[INFO] [stdout]   --> src/picasso.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 13 | struct Ref {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Builder` is never constructed
[INFO] [stdout]   --> src/picasso.rs:17:8
[INFO] [stdout]    |
[INFO] [stdout] 17 | struct Builder {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 14 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 5.24s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: syn v0.10.8
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 1`
[INFO] running `Command { std: "docker" "inspect" "715a7de3eb9bd06420c87483283e7a8e41ff393cefee0eedf509fca059356ee6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "715a7de3eb9bd06420c87483283e7a8e41ff393cefee0eedf509fca059356ee6", kill_on_drop: false }`
[INFO] [stdout] 715a7de3eb9bd06420c87483283e7a8e41ff393cefee0eedf509fca059356ee6