[INFO] cloning repository https://github.com/MDeiml/mademath
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/MDeiml/mademath" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMDeiml%2Fmademath", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMDeiml%2Fmademath'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f82f2516fe458e530415b7b178e8954da90cf3a3
[INFO] checking MDeiml/mademath against master#19dd9535408db0f1ff3d16613619076aef524d19 for pr-115950
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMDeiml%2Fmademath" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/MDeiml/mademath on toolchain 19dd9535408db0f1ff3d16613619076aef524d19
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+19dd9535408db0f1ff3d16613619076aef524d19" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/MDeiml/mademath
[INFO] finished tweaking git repo https://github.com/MDeiml/mademath
[INFO] tweaked toml for git repo https://github.com/MDeiml/mademath written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/MDeiml/mademath 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" "+19dd9535408db0f1ff3d16613619076aef524d19" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:4f8da3c744d2da974e54ce020a79f4ad54313e914ebeaab8fc086f07e8d8b066" "/opt/rustwide/cargo-home/bin/cargo" "+19dd9535408db0f1ff3d16613619076aef524d19" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ab1d90785f6c959b0abd6b39f00349ce7f333fe0eb9648d85839d0aafdf10195
[INFO] running `Command { std: "docker" "start" "-a" "ab1d90785f6c959b0abd6b39f00349ce7f333fe0eb9648d85839d0aafdf10195", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ab1d90785f6c959b0abd6b39f00349ce7f333fe0eb9648d85839d0aafdf10195", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ab1d90785f6c959b0abd6b39f00349ce7f333fe0eb9648d85839d0aafdf10195", kill_on_drop: false }`
[INFO] [stdout] ab1d90785f6c959b0abd6b39f00349ce7f333fe0eb9648d85839d0aafdf10195
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:4f8da3c744d2da974e54ce020a79f4ad54313e914ebeaab8fc086f07e8d8b066" "/opt/rustwide/cargo-home/bin/cargo" "+19dd9535408db0f1ff3d16613619076aef524d19" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e7a6745ca7bfba5efe908f98ff41911fdff934daca31ecafcec045f9fce44d42
[INFO] running `Command { std: "docker" "start" "-a" "e7a6745ca7bfba5efe908f98ff41911fdff934daca31ecafcec045f9fce44d42", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.126
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]     Checking minimal-lexical v0.2.1
[INFO] [stderr]     Checking regex-syntax v0.6.26
[INFO] [stderr]     Checking aho-corasick v0.7.18
[INFO] [stderr]     Checking nom v7.1.1
[INFO] [stderr]     Checking getrandom v0.2.6
[INFO] [stderr]     Checking regex v1.5.6
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking env_logger v0.8.4
[INFO] [stderr]     Checking attomath v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking quickcheck v1.0.3
[INFO] [stdout] warning: call to `.borrow()` on a reference in this situation does nothing
[INFO] [stdout]    --> src/expression.rs:142:21
[INFO] [stdout]     |
[INFO] [stdout] 142 |                 self.borrow()
[INFO] [stdout]     |                     ^^^^^^^^^ help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `Expression<T>` does not implement `Borrow`, so calling `borrow` on `&Expression<T>` copies the reference, which does not do anything and can be removed
[INFO] [stdout]     = note: `#[warn(noop_method_call)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.borrow()` on a reference in this situation does nothing
[INFO] [stdout]    --> src/expression.rs:209:69
[INFO] [stdout]     |
[INFO] [stdout] 209 | ...                   Box::from(self.subexpression(start).data.borrow()),
[INFO] [stdout]     |                                                               ^^^^^^^^^ help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `[i16]` does not implement `Borrow`, so calling `borrow` on `&[i16]` copies the reference, which does not do anything and can be removed
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.borrow()` on a reference in this situation does nothing
[INFO] [stdout]    --> src/expression.rs:214:47
[INFO] [stdout]     |
[INFO] [stdout] 214 |                     expr_index += subexpr.data.borrow().len();
[INFO] [stdout]     |                                               ^^^^^^^^^ help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `[i16]` does not implement `Borrow`, so calling `borrow` on `&[i16]` copies the reference, which does not do anything and can be removed
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.borrow()` on a reference in this situation does nothing
[INFO] [stdout]    --> src/expression.rs:218:47
[INFO] [stdout]     |
[INFO] [stdout] 218 | ...                   data: subexpr.data.borrow(),
[INFO] [stdout]     |                                         ^^^^^^^^^ help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `[i16]` does not implement `Borrow`, so calling `borrow` on `&[i16]` copies the reference, which does not do anything and can be removed
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.borrow()` on a reference in this situation does nothing
[INFO] [stdout]    --> src/expression.rs:257:58
[INFO] [stdout]     |
[INFO] [stdout] 257 |         Self::subexpression_check(expr, 0).map(|s| s.data.borrow().len())
[INFO] [stdout]     |                                                          ^^^^^^^^^ help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `[i16]` does not implement `Borrow`, so calling `borrow` on `&[i16]` copies the reference, which does not do anything and can be removed
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]    --> src/serialization/database.rs:114:17
[INFO] [stdout]     |
[INFO] [stdout] 114 |                 &entry.insert((self.last_name, index + 1));
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 114 |                 let _ = &entry.insert((self.last_name, index + 1));
[INFO] [stdout]     |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.borrow()` on a reference in this situation does nothing
[INFO] [stdout]    --> src/expression.rs:142:21
[INFO] [stdout]     |
[INFO] [stdout] 142 |                 self.borrow()
[INFO] [stdout]     |                     ^^^^^^^^^ help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `expression::Expression<T>` does not implement `Borrow`, so calling `borrow` on `&expression::Expression<T>` copies the reference, which does not do anything and can be removed
[INFO] [stdout]     = note: `#[warn(noop_method_call)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.borrow()` on a reference in this situation does nothing
[INFO] [stdout]    --> src/expression.rs:209:69
[INFO] [stdout]     |
[INFO] [stdout] 209 | ...                   Box::from(self.subexpression(start).data.borrow()),
[INFO] [stdout]     |                                                               ^^^^^^^^^ help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `[i16]` does not implement `Borrow`, so calling `borrow` on `&[i16]` copies the reference, which does not do anything and can be removed
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.borrow()` on a reference in this situation does nothing
[INFO] [stdout]    --> src/expression.rs:214:47
[INFO] [stdout]     |
[INFO] [stdout] 214 |                     expr_index += subexpr.data.borrow().len();
[INFO] [stdout]     |                                               ^^^^^^^^^ help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `[i16]` does not implement `Borrow`, so calling `borrow` on `&[i16]` copies the reference, which does not do anything and can be removed
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.borrow()` on a reference in this situation does nothing
[INFO] [stdout]    --> src/expression.rs:218:47
[INFO] [stdout]     |
[INFO] [stdout] 218 | ...                   data: subexpr.data.borrow(),
[INFO] [stdout]     |                                         ^^^^^^^^^ help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `[i16]` does not implement `Borrow`, so calling `borrow` on `&[i16]` copies the reference, which does not do anything and can be removed
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.borrow()` on a reference in this situation does nothing
[INFO] [stdout]    --> src/expression.rs:257:58
[INFO] [stdout]     |
[INFO] [stdout] 257 |         Self::subexpression_check(expr, 0).map(|s| s.data.borrow().len())
[INFO] [stdout]     |                                                          ^^^^^^^^^ help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `[i16]` does not implement `Borrow`, so calling `borrow` on `&[i16]` copies the reference, which does not do anything and can be removed
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]    --> src/serialization/database.rs:114:17
[INFO] [stdout]     |
[INFO] [stdout] 114 |                 &entry.insert((self.last_name, index + 1));
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 114 |                 let _ = &entry.insert((self.last_name, index + 1));
[INFO] [stdout]     |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.50s
[INFO] running `Command { std: "docker" "inspect" "e7a6745ca7bfba5efe908f98ff41911fdff934daca31ecafcec045f9fce44d42", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e7a6745ca7bfba5efe908f98ff41911fdff934daca31ecafcec045f9fce44d42", kill_on_drop: false }`
[INFO] [stdout] e7a6745ca7bfba5efe908f98ff41911fdff934daca31ecafcec045f9fce44d42