[INFO] cloning repository https://github.com/iljakuklic/cover
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/iljakuklic/cover" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Filjakuklic%2Fcover", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Filjakuklic%2Fcover'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] af613e74518207ac289c30e616d6dadf4fa54bc5
[INFO] checking iljakuklic/cover against master#46424fb5054f211ec836c5c03159f92e46bb35ac for pr-139042
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Filjakuklic%2Fcover" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/iljakuklic/cover on toolchain 46424fb5054f211ec836c5c03159f92e46bb35ac
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+46424fb5054f211ec836c5c03159f92e46bb35ac" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/iljakuklic/cover
[INFO] finished tweaking git repo https://github.com/iljakuklic/cover
[INFO] tweaked toml for git repo https://github.com/iljakuklic/cover written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+46424fb5054f211ec836c5c03159f92e46bb35ac" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Updating git repository `https://github.com/iljakuklic/sorted-iter`
[INFO] [stderr]      Locking 27 packages to latest compatible versions
[INFO] [stderr]       Adding quickcheck v0.9.2 (available: v1.0.3)
[INFO] [stderr]       Adding quickcheck_macros v0.9.1 (available: v1.0.0)
[INFO] [stderr]       Adding rand v0.7.3 (available: v0.9.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+46424fb5054f211ec836c5c03159f92e46bb35ac" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded phantom_newtype v0.2.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:4b26683ee3c49f365255c425c23003cbf4366de097804722c29c5bbbee3624d2" "/opt/rustwide/cargo-home/bin/cargo" "+46424fb5054f211ec836c5c03159f92e46bb35ac" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7276c30b98142b283fe9031997b373273ff92587a46a8c8363534e983de6da52
[INFO] running `Command { std: "docker" "start" "-a" "7276c30b98142b283fe9031997b373273ff92587a46a8c8363534e983de6da52", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7276c30b98142b283fe9031997b373273ff92587a46a8c8363534e983de6da52", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7276c30b98142b283fe9031997b373273ff92587a46a8c8363534e983de6da52", kill_on_drop: false }`
[INFO] [stdout] 7276c30b98142b283fe9031997b373273ff92587a46a8c8363534e983de6da52
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:4b26683ee3c49f365255c425c23003cbf4366de097804722c29c5bbbee3624d2" "/opt/rustwide/cargo-home/bin/cargo" "+46424fb5054f211ec836c5c03159f92e46bb35ac" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 594eb35544da14edc8c2fc8bfb8f72e2a668b316b9068a61d39bb06a83c6aafd
[INFO] running `Command { std: "docker" "start" "-a" "594eb35544da14edc8c2fc8bfb8f72e2a668b316b9068a61d39bb06a83c6aafd", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.171
[INFO] [stderr]    Compiling getrandom v0.1.16
[INFO] [stderr]    Compiling zerocopy v0.8.24
[INFO] [stderr]    Compiling proc-macro2 v1.0.94
[INFO] [stderr]     Checking memchr v2.7.4
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]    Compiling unicode-ident v1.0.18
[INFO] [stderr]     Checking regex-syntax v0.8.5
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking log v0.4.27
[INFO] [stderr]     Checking phantom_newtype v0.2.0
[INFO] [stderr]     Checking sorted-iter v0.1.5 (https://github.com/iljakuklic/sorted-iter?branch=multiway-union#ec69da7c)
[INFO] [stderr]     Checking cover v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: type alias `RowIdx` is never used
[INFO] [stdout]   --> src/structs/binary_matrix.rs:19:10
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub type RowIdx = Idx<RowTag>;
[INFO] [stdout]    |          ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `ColIdx` is never used
[INFO] [stdout]   --> src/structs/binary_matrix.rs:21:10
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub type ColIdx = Idx<ColTag>;
[INFO] [stdout]    |          ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new_empty`, `from_iter`, `ones_iter`, `transposed_cells_iter`, `transposed`, and `filtered` are never used
[INFO] [stdout]    --> src/structs/binary_matrix.rs:40:8
[INFO] [stdout]     |
[INFO] [stdout] 37  | impl<J, I> Store<J, I> {
[INFO] [stdout]     | ---------------------- associated items in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 40  |     fn new_empty() -> Store<J, I> {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 46  |     fn from_iter<Iter>(iter: Iter) -> Store<J, I>
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 89  |     fn ones_iter<'a>(&'a self)
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 97  |     fn transposed_cells_iter<'a>(&'a self)
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 105 |     fn transposed(&self) -> Store<I, J> {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 142 |     fn filtered<Pred: Fn(&(Idx<J>, Idx<I>)) -> bool>(&self, p: Pred) -> Self {
[INFO] [stdout]     |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated functions `from_iter` and `from_rows` are never used
[INFO] [stdout]    --> src/structs/binary_matrix.rs:193:12
[INFO] [stdout]     |
[INFO] [stdout] 191 | impl BinaryMatrix {
[INFO] [stdout]     | ----------------- associated functions in this implementation
[INFO] [stdout] 192 |     /// Create a binary matrix from a sorted iterator over one-cell coordinates.
[INFO] [stdout] 193 |     pub fn from_iter<Iter>(it: Iter) -> Self 
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 199 |     fn from_rows(by_row: Store<RowTag, ColTag>) -> Self {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `IDMap` is never constructed
[INFO] [stdout]   --> src/structs/id_map.rs:11:8
[INFO] [stdout]    |
[INFO] [stdout] 11 | struct IDMap<ObjT, ID> {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `lookup`, `get`, `back`, `items`, and `len` are never used
[INFO] [stdout]   --> src/structs/id_map.rs:20:12
[INFO] [stdout]    |
[INFO] [stdout] 16 | / impl<ObjT, ID> IDMap<ObjT, ID>
[INFO] [stdout] 17 | | where ObjT: Clone + Eq + std::hash::Hash, ID: Copy + From<usize> + Into<usize> {
[INFO] [stdout]    | |______________________________________________________________________________- associated items in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 20 |       pub fn new() -> IDMap<ObjT, ID> {
[INFO] [stdout]    |              ^^^
[INFO] [stdout] ...
[INFO] [stdout] 25 |       pub fn lookup(&self, obj: &ObjT) -> Option<ID> {
[INFO] [stdout]    |              ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 30 |       pub fn get(&mut self, obj: &ObjT) -> ID {
[INFO] [stdout]    |              ^^^
[INFO] [stdout] ...
[INFO] [stdout] 41 |       pub fn back(&self, id: ID) -> &ObjT {
[INFO] [stdout]    |              ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 46 |       pub fn items(&self) -> impl Iterator<Item=(ID, &ObjT)> {
[INFO] [stdout]    |              ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 51 |       pub fn len(&self) -> usize {
[INFO] [stdout]    |              ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking aho-corasick v1.1.3
[INFO] [stderr]    Compiling quote v1.0.40
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking regex-automata v0.4.9
[INFO] [stderr]     Checking ppv-lite86 v0.2.21
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking regex v1.11.1
[INFO] [stderr]    Compiling quickcheck_macros v0.9.1
[INFO] [stderr]     Checking env_logger v0.7.1
[INFO] [stderr]     Checking quickcheck v0.9.2
[INFO] [stdout] warning: elided lifetime has a name
[INFO] [stdout]    --> src/structs/binary_matrix.rs:154:60
[INFO] [stdout]     |
[INFO] [stdout] 154 |         fn check(b: bool, err: &'static str) -> Result<(), &str> {
[INFO] [stdout]     |                                                            ^ this elided lifetime gets resolved as `'static`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(elided_named_lifetimes)]` on by default
[INFO] [stdout] help: consider specifying it explicitly
[INFO] [stdout]     |
[INFO] [stdout] 154 |         fn check(b: bool, err: &'static str) -> Result<(), &'static str> {
[INFO] [stdout]     |                                                             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `from_iter` is never used
[INFO] [stdout]    --> src/structs/binary_matrix.rs:193:12
[INFO] [stdout]     |
[INFO] [stdout] 191 | impl BinaryMatrix {
[INFO] [stdout]     | ----------------- associated function in this implementation
[INFO] [stdout] 192 |     /// Create a binary matrix from a sorted iterator over one-cell coordinates.
[INFO] [stdout] 193 |     pub fn from_iter<Iter>(it: Iter) -> Self 
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `IDMap` is never constructed
[INFO] [stdout]   --> src/structs/id_map.rs:11:8
[INFO] [stdout]    |
[INFO] [stdout] 11 | struct IDMap<ObjT, ID> {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `lookup`, `get`, `back`, `items`, and `len` are never used
[INFO] [stdout]   --> src/structs/id_map.rs:20:12
[INFO] [stdout]    |
[INFO] [stdout] 16 | / impl<ObjT, ID> IDMap<ObjT, ID>
[INFO] [stdout] 17 | | where ObjT: Clone + Eq + std::hash::Hash, ID: Copy + From<usize> + Into<usize> {
[INFO] [stdout]    | |______________________________________________________________________________- associated items in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 20 |       pub fn new() -> IDMap<ObjT, ID> {
[INFO] [stdout]    |              ^^^
[INFO] [stdout] ...
[INFO] [stdout] 25 |       pub fn lookup(&self, obj: &ObjT) -> Option<ID> {
[INFO] [stdout]    |              ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 30 |       pub fn get(&mut self, obj: &ObjT) -> ID {
[INFO] [stdout]    |              ^^^
[INFO] [stdout] ...
[INFO] [stdout] 41 |       pub fn back(&self, id: ID) -> &ObjT {
[INFO] [stdout]    |              ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 46 |       pub fn items(&self) -> impl Iterator<Item=(ID, &ObjT)> {
[INFO] [stdout]    |              ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 51 |       pub fn len(&self) -> usize {
[INFO] [stdout]    |              ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 8.43s
[INFO] running `Command { std: "docker" "inspect" "594eb35544da14edc8c2fc8bfb8f72e2a668b316b9068a61d39bb06a83c6aafd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "594eb35544da14edc8c2fc8bfb8f72e2a668b316b9068a61d39bb06a83c6aafd", kill_on_drop: false }`
[INFO] [stdout] 594eb35544da14edc8c2fc8bfb8f72e2a668b316b9068a61d39bb06a83c6aafd
