[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 try#f47dd4da3ae8c32c9e65d307bfe640b143e674df for pr-77526
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpanicbit%2Fross" "/workspace/builds/worker-12/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-12/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/panicbit/ross on toolchain f47dd4da3ae8c32c9e65d307bfe640b143e674df
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "read-manifest" "--manifest-path" "Cargo.toml", 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-12/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: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[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-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 53bf5e135d85913d3a05f9ec2d0d92f3f6aa7d7e7b40db42c48ee3d9b769e4ff
[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" "53bf5e135d85913d3a05f9ec2d0d92f3f6aa7d7e7b40db42c48ee3d9b769e4ff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "53bf5e135d85913d3a05f9ec2d0d92f3f6aa7d7e7b40db42c48ee3d9b769e4ff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "53bf5e135d85913d3a05f9ec2d0d92f3f6aa7d7e7b40db42c48ee3d9b769e4ff", kill_on_drop: false }`
[INFO] [stdout] 53bf5e135d85913d3a05f9ec2d0d92f3f6aa7d7e7b40db42c48ee3d9b769e4ff
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bce2629ebd095c07e95dbd11eaf64e24c96475176b665169dd3b5a60b15df867
[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" "bce2629ebd095c07e95dbd11eaf64e24c96475176b665169dd3b5a60b15df867", kill_on_drop: false }`
[INFO] [stderr]    Compiling pest v1.0.1
[INFO] [stderr]    Compiling syn v0.10.8
[INFO] [stderr]     Checking itertools v0.7.6
[INFO] [stderr]    Compiling synstructure v0.6.1
[INFO] [stderr]     Checking backtrace-sys v0.1.16
[INFO] [stderr]     Checking backtrace v0.3.5
[INFO] [stderr]    Compiling failure_derive v0.1.1
[INFO] [stderr]     Checking failure v0.1.1
[INFO] [stderr]    Compiling pest_derive v1.0.1
[INFO] [stderr]     Checking ross v0.1.0 (/opt/rustwide/workdir)
[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]     |                                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item=&'a Ident> + 'a`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(bare_trait_objects)]` 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]     |                                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item=&'a Ident> + 'a`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(bare_trait_objects)]` 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: 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: struct is never constructed: `Scope`
[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: associated function is never used: `new`
[INFO] [stdout]   --> src/trans.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 13 |     fn new(available: usize) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `alloc`
[INFO] [stdout]   --> src/trans.rs:17:8
[INFO] [stdout]    |
[INFO] [stdout] 17 |     fn alloc(&mut self) -> Option<usize> {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `module`
[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 is never used: `static_blocks_are_unique`
[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 is never used: `item_names_are_unique`
[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 is never used: `functions_dont_recur`
[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 is never used: `ConstExpr`
[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 is never used: `Register`
[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 is never constructed: `Ref`
[INFO] [stdout]   --> src/picasso.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 13 | struct Ref {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Builder`
[INFO] [stdout]   --> src/picasso.rs:17:8
[INFO] [stdout]    |
[INFO] [stdout] 17 | struct Builder {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `main`
[INFO] [stdout]   --> src/lib.rs:17:4
[INFO] [stdout]    |
[INFO] [stdout] 17 | fn main() {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Scope`
[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: associated function is never used: `new`
[INFO] [stdout]   --> src/trans.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 13 |     fn new(available: usize) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `alloc`
[INFO] [stdout]   --> src/trans.rs:17:8
[INFO] [stdout]    |
[INFO] [stdout] 17 |     fn alloc(&mut self) -> Option<usize> {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `module`
[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 is never used: `static_blocks_are_unique`
[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 is never used: `item_names_are_unique`
[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 is never used: `functions_dont_recur`
[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 is never used: `ConstExpr`
[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 is never used: `Register`
[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 is never constructed: `Ref`
[INFO] [stdout]   --> src/picasso.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 13 | struct Ref {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Builder`
[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] [stdout] warning: 14 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 18.32s
[INFO] running `Command { std: "docker" "inspect" "bce2629ebd095c07e95dbd11eaf64e24c96475176b665169dd3b5a60b15df867", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bce2629ebd095c07e95dbd11eaf64e24c96475176b665169dd3b5a60b15df867", kill_on_drop: false }`
[INFO] [stdout] bce2629ebd095c07e95dbd11eaf64e24c96475176b665169dd3b5a60b15df867