[INFO] cloning repository https://github.com/m4dh0rs3/cas
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/m4dh0rs3/cas" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fm4dh0rs3%2Fcas", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fm4dh0rs3%2Fcas'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] def0572553ea71cd8b602981851a4a82fbdf5c94
[INFO] checking m4dh0rs3/cas against master#4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5 for pr-81174
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fm4dh0rs3%2Fcas" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/m4dh0rs3/cas on toolchain 4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/m4dh0rs3/cas
[INFO] finished tweaking git repo https://github.com/m4dh0rs3/cas
[INFO] tweaked toml for git repo https://github.com/m4dh0rs3/cas written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/m4dh0rs3/cas already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 224c3efacf857ea4265f091cefe9972e44b5069198141e8d7a3dfd5b295c799d
[INFO] running `Command { std: "docker" "start" "-a" "224c3efacf857ea4265f091cefe9972e44b5069198141e8d7a3dfd5b295c799d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "224c3efacf857ea4265f091cefe9972e44b5069198141e8d7a3dfd5b295c799d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "224c3efacf857ea4265f091cefe9972e44b5069198141e8d7a3dfd5b295c799d", kill_on_drop: false }`
[INFO] [stdout] 224c3efacf857ea4265f091cefe9972e44b5069198141e8d7a3dfd5b295c799d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] d78a79660542f83e0333b25ffe06ba916927e2830251412701910486665e72ed
[INFO] running `Command { std: "docker" "start" "-a" "d78a79660542f83e0333b25ffe06ba916927e2830251412701910486665e72ed", kill_on_drop: false }`
[INFO] [stderr]     Checking cas v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]   --> src/cas/parser.rs:66:13
[INFO] [stdout]    |
[INFO] [stdout] 66 |             token => Err(ParserErr::Panic(format!("unexpected token `{}`", token))),
[INFO] [stdout]    |             ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]   --> src/cas/parser.rs:81:21
[INFO] [stdout]    |
[INFO] [stdout] 81 |                     _ => Err(ParserErr::Panic(format!(
[INFO] [stdout]    |                     ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `at`
[INFO] [stdout]   --> src/cli/display.rs:20:36
[INFO] [stdout]    |
[INFO] [stdout] 20 |             LexerErr::Panic { msg, at } => {
[INFO] [stdout]    |                                    ^^ help: try ignoring the field: `at: _`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]   --> src/cas/parser.rs:66:13
[INFO] [stdout]    |
[INFO] [stdout] 66 |             token => Err(ParserErr::Panic(format!("unexpected token `{}`", token))),
[INFO] [stdout]    |             ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]   --> src/cas/parser.rs:81:21
[INFO] [stdout]    |
[INFO] [stdout] 81 |                     _ => Err(ParserErr::Panic(format!(
[INFO] [stdout]    |                     ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `at`
[INFO] [stdout]   --> src/cli/display.rs:20:36
[INFO] [stdout]    |
[INFO] [stdout] 20 |             LexerErr::Panic { msg, at } => {
[INFO] [stdout]    |                                    ^^ help: try ignoring the field: `at: _`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/cas/expr/atom/number/ops.rs:79:24
[INFO] [stdout]    |
[INFO] [stdout] 79 |     pub(crate) fn fact(mut self) -> Number {
[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: variable does not need to be mutable
[INFO] [stdout]   --> src/cas/expr/atom/number/ops.rs:79:24
[INFO] [stdout]    |
[INFO] [stdout] 79 |     pub(crate) fn fact(mut self) -> Number {
[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: associated function is never used: `exp`
[INFO] [stdout]   --> src/cas/expr/atom/number/ops.rs:75:19
[INFO] [stdout]    |
[INFO] [stdout] 75 |     pub(crate) fn exp(self) -> Number {
[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: `angle`
[INFO] [stdout]    --> src/cas/expr/atom/number/ops.rs:177:19
[INFO] [stdout]     |
[INFO] [stdout] 177 |     pub(crate) fn angle(self, rhs: Number) -> Number {
[INFO] [stdout]     |                   ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `parse_hex`
[INFO] [stdout]   --> src/cas/expr/atom/number.rs:61:8
[INFO] [stdout]    |
[INFO] [stdout] 61 |     fn parse_hex(lexer: &mut Lexer) -> Result<Number, LexerErr> {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `parse_bin`
[INFO] [stdout]   --> src/cas/expr/atom/number.rs:78:8
[INFO] [stdout]    |
[INFO] [stdout] 78 |     fn parse_bin(lexer: &mut Lexer) -> Result<Number, LexerErr> {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `is_hex_digit`
[INFO] [stdout]    --> src/cas/expr/atom/number.rs:100:4
[INFO] [stdout]     |
[INFO] [stdout] 100 | fn is_hex_digit(pot: &char) -> bool {
[INFO] [stdout]     |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `is_bin_digit`
[INFO] [stdout]    --> src/cas/expr/atom/number.rs:104:4
[INFO] [stdout]     |
[INFO] [stdout] 104 | fn is_bin_digit(pot: &char) -> bool {
[INFO] [stdout]     |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `order`
[INFO] [stdout]    --> src/cas/expr.rs:274:8
[INFO] [stdout]     |
[INFO] [stdout] 274 |     fn order(&mut self) {}
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `simplify`
[INFO] [stdout]    --> src/cas/expr.rs:276:8
[INFO] [stdout]     |
[INFO] [stdout] 276 |     fn simplify(&mut self) {}
[INFO] [stdout]     |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `HEX_DIGITS`
[INFO] [stdout]   --> src/cas/lexer.rs:32:1
[INFO] [stdout]    |
[INFO] [stdout] 32 | pub(crate) const HEX_DIGITS: &'static str = "0123456789ABCDEF";
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `BIN_DIGITS`
[INFO] [stdout]   --> src/cas/lexer.rs:33:1
[INFO] [stdout]    |
[INFO] [stdout] 33 | pub(crate) const BIN_DIGITS: &'static str = "01";
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `exp`
[INFO] [stdout]   --> src/cas/expr/atom/number/ops.rs:75:19
[INFO] [stdout]    |
[INFO] [stdout] 75 |     pub(crate) fn exp(self) -> Number {
[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: `angle`
[INFO] [stdout]    --> src/cas/expr/atom/number/ops.rs:177:19
[INFO] [stdout]     |
[INFO] [stdout] 177 |     pub(crate) fn angle(self, rhs: Number) -> Number {
[INFO] [stdout]     |                   ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `parse_hex`
[INFO] [stdout]   --> src/cas/expr/atom/number.rs:61:8
[INFO] [stdout]    |
[INFO] [stdout] 61 |     fn parse_hex(lexer: &mut Lexer) -> Result<Number, LexerErr> {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `parse_bin`
[INFO] [stdout]   --> src/cas/expr/atom/number.rs:78:8
[INFO] [stdout]    |
[INFO] [stdout] 78 |     fn parse_bin(lexer: &mut Lexer) -> Result<Number, LexerErr> {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `is_hex_digit`
[INFO] [stdout]    --> src/cas/expr/atom/number.rs:100:4
[INFO] [stdout]     |
[INFO] [stdout] 100 | fn is_hex_digit(pot: &char) -> bool {
[INFO] [stdout]     |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `is_bin_digit`
[INFO] [stdout]    --> src/cas/expr/atom/number.rs:104:4
[INFO] [stdout]     |
[INFO] [stdout] 104 | fn is_bin_digit(pot: &char) -> bool {
[INFO] [stdout]     |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `order`
[INFO] [stdout]    --> src/cas/expr.rs:274:8
[INFO] [stdout]     |
[INFO] [stdout] 274 |     fn order(&mut self) {}
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `simplify`
[INFO] [stdout]    --> src/cas/expr.rs:276:8
[INFO] [stdout]     |
[INFO] [stdout] 276 |     fn simplify(&mut self) {}
[INFO] [stdout]     |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `HEX_DIGITS`
[INFO] [stdout]   --> src/cas/lexer.rs:32:1
[INFO] [stdout]    |
[INFO] [stdout] 32 | pub(crate) const HEX_DIGITS: &'static str = "0123456789ABCDEF";
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `BIN_DIGITS`
[INFO] [stdout]   --> src/cas/lexer.rs:33:1
[INFO] [stdout]    |
[INFO] [stdout] 33 | pub(crate) const BIN_DIGITS: &'static str = "01";
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/cas/parser.rs:94:17
[INFO] [stdout]    |
[INFO] [stdout] 94 |                 lexer.token();
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/cas/parser.rs:106:21
[INFO] [stdout]     |
[INFO] [stdout] 106 |                     lexer.token();
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/cas/parser.rs:94:17
[INFO] [stdout]    |
[INFO] [stdout] 94 |                 lexer.token();
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/cas/parser.rs:106:21
[INFO] [stdout]     |
[INFO] [stdout] 106 |                     lexer.token();
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 16 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 16 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.20s
[INFO] running `Command { std: "docker" "inspect" "d78a79660542f83e0333b25ffe06ba916927e2830251412701910486665e72ed", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d78a79660542f83e0333b25ffe06ba916927e2830251412701910486665e72ed", kill_on_drop: false }`
[INFO] [stdout] d78a79660542f83e0333b25ffe06ba916927e2830251412701910486665e72ed