[INFO] fetching crate comacro 0.0.1...
[INFO] testing comacro-0.0.1 against try#c2e32f1c9652b13ed99608599c1e855462f421f3 for pr-146098-7
[INFO] extracting crate comacro 0.0.1 into /workspace/builds/worker-2-tc2/source
[INFO] started tweaking crates.io crate comacro 0.0.1
[INFO] finished tweaking crates.io crate comacro 0.0.1
[INFO] tweaked toml for crates.io crate comacro 0.0.1 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate comacro 0.0.1 on toolchain c2e32f1c9652b13ed99608599c1e855462f421f3
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 22 packages to latest compatible versions
[INFO] [stderr]       Adding env_logger v0.5.13 (available: v0.11.8)
[INFO] [stderr]       Adding proc-macro2 v0.4.30 (available: v1.0.103)
[INFO] [stderr]       Adding syn v0.15.44 (available: v2.0.110)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e4ce5a95ab9501749184d6731a1db5d4ebc858247a4b96bf879cd58fb2df4936
[INFO] running `Command { std: "docker" "start" "-a" "e4ce5a95ab9501749184d6731a1db5d4ebc858247a4b96bf879cd58fb2df4936", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e4ce5a95ab9501749184d6731a1db5d4ebc858247a4b96bf879cd58fb2df4936", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e4ce5a95ab9501749184d6731a1db5d4ebc858247a4b96bf879cd58fb2df4936", kill_on_drop: false }`
[INFO] [stdout] e4ce5a95ab9501749184d6731a1db5d4ebc858247a4b96bf879cd58fb2df4936
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e19c48af13fbdc9684470507ff7adfc7e53cd5b8a79de37f4bd6a17330833eff
[INFO] running `Command { std: "docker" "start" "-a" "e19c48af13fbdc9684470507ff7adfc7e53cd5b8a79de37f4bd6a17330833eff", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling log v0.4.28
[INFO] [stderr]    Compiling comacro v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around pattern
[INFO] [stdout]   --> src/trace.rs:84:21
[INFO] [stdout]    |
[INFO] [stdout] 84 |                 let ((&x, rest)) = rest.split_first().unwrap();
[INFO] [stdout]    |                     ^          ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 84 -                 let ((&x, rest)) = rest.split_first().unwrap();
[INFO] [stdout] 84 +                 let (&x, rest) = rest.split_first().unwrap();
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `core::str::<impl str>::trim_left_matches`: superseded by `trim_start_matches`
[INFO] [stdout]   --> src/matchcode.rs:58:22
[INFO] [stdout]    |
[INFO] [stdout] 58 |         let x_id = x.trim_left_matches("IDENT_");
[INFO] [stdout]    |                      ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] help: replace the use of the deprecated method
[INFO] [stdout]    |
[INFO] [stdout] 58 -         let x_id = x.trim_left_matches("IDENT_");
[INFO] [stdout] 58 +         let x_id = x.trim_start_matches("IDENT_");
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `core::str::<impl str>::trim_left_matches`: superseded by `trim_start_matches`
[INFO] [stdout]   --> src/matchcode.rs:59:24
[INFO] [stdout]    |
[INFO] [stdout] 59 |         let x_expr = x.trim_left_matches("EXPR_");
[INFO] [stdout]    |                        ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] help: replace the use of the deprecated method
[INFO] [stdout]    |
[INFO] [stdout] 59 -         let x_expr = x.trim_left_matches("EXPR_");
[INFO] [stdout] 59 +         let x_expr = x.trim_start_matches("EXPR_");
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]    --> src/repr.rs:270:29
[INFO] [stdout]     |
[INFO] [stdout] 270 |     fn push_byte(&mut self, x: u8) {}
[INFO] [stdout]     |                             ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]    --> src/repr.rs:271:32
[INFO] [stdout]     |
[INFO] [stdout] 271 |     fn extend_bytes(&mut self, x: &[u8]) {}
[INFO] [stdout]     |                                ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Cont` is never constructed
[INFO] [stdout]   --> src/tokens.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | enum MacBodyState {
[INFO] [stdout]    |      ------------ variant in this enum
[INFO] [stdout] ...
[INFO] [stdout] 18 |     Cont,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `MacBodyState` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/matchcode.rs:259:42
[INFO] [stdout]     |
[INFO] [stdout] 259 | pub fn bind_expr(trace: ReTracer, stmts: &[syn::Stmt]) -> Bindings {
[INFO] [stdout]     |                                          ^^^^^^^^^^^^     ^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                                          |
[INFO] [stdout]     |                                          the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 259 | pub fn bind_expr(trace: ReTracer, stmts: &[syn::Stmt]) -> Bindings<'_> {
[INFO] [stdout]     |                                                                   ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/matchcode.rs:265:46
[INFO] [stdout]     |
[INFO] [stdout] 265 | pub fn bind_expr_expr(trace: ReTracer, expr: &syn::Expr) -> Bindings {
[INFO] [stdout]     |                                              ^^^^^^^^^^     ^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                                              |
[INFO] [stdout]     |                                              the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 265 | pub fn bind_expr_expr(trace: ReTracer, expr: &syn::Expr) -> Bindings<'_> {
[INFO] [stdout]     |                                                                     ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/repr.rs:41:9
[INFO] [stdout]    |
[INFO] [stdout] 41 |         write!(self.buf, "${}", x);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 41 |         let _ = write!(self.buf, "${}", x);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/repr.rs:47:9
[INFO] [stdout]    |
[INFO] [stdout] 47 |         write!(self.buf, "{}", s);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 47 |         let _ = write!(self.buf, "{}", s);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/repr.rs:53:9
[INFO] [stdout]    |
[INFO] [stdout] 53 |         write!(self.buf, "{}", s);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 53 |         let _ = write!(self.buf, "{}", s);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/repr.rs:59:9
[INFO] [stdout]    |
[INFO] [stdout] 59 |         write!(self.buf, "{}{{", s);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 59 |         let _ = write!(self.buf, "{}{{", s);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/repr.rs:65:9
[INFO] [stdout]    |
[INFO] [stdout] 65 |         write!(self.buf, "}}");
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 65 |         let _ = write!(self.buf, "}}");
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/repr.rs:71:13
[INFO] [stdout]    |
[INFO] [stdout] 71 |             write!(self.buf, "\n");
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 71 |             let _ = write!(self.buf, "\n");
[INFO] [stdout]    |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/repr.rs:90:9
[INFO] [stdout]    |
[INFO] [stdout] 90 |         write!(buf, "[");
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 90 |         let _ = write!(buf, "[");
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/repr.rs:113:13
[INFO] [stdout]     |
[INFO] [stdout] 113 |             write!(self.buf, "]");
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 113 |             let _ = write!(self.buf, "]");
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/repr.rs:120:9
[INFO] [stdout]     |
[INFO] [stdout] 120 |         write!(self.buf, "\"${}\"", x);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 120 |         let _ = write!(self.buf, "\"${}\"", x);
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/repr.rs:126:9
[INFO] [stdout]     |
[INFO] [stdout] 126 |         write!(self.buf, "{}", s);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 126 |         let _ = write!(self.buf, "{}", s);
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/repr.rs:132:9
[INFO] [stdout]     |
[INFO] [stdout] 132 |         write!(self.buf, "\"{}\"", s);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 132 |         let _ = write!(self.buf, "\"{}\"", s);
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/repr.rs:138:9
[INFO] [stdout]     |
[INFO] [stdout] 138 |         write!(self.buf, "[\"{}\"", s);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 138 |         let _ = write!(self.buf, "[\"{}\"", s);
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/repr.rs:143:9
[INFO] [stdout]     |
[INFO] [stdout] 143 |         write!(self.buf, "]");
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 143 |         let _ = write!(self.buf, "]");
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/trace.rs:22:15
[INFO] [stdout]    |
[INFO] [stdout] 22 |     fn traces(&self) -> Traces {
[INFO] [stdout]    |               ^^^^^     ^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |               |
[INFO] [stdout]    |               the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 22 |     fn traces(&self) -> Traces<'_> {
[INFO] [stdout]    |                               ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/trace.rs:109:16
[INFO] [stdout]     |
[INFO] [stdout] 109 |     fn symbols(&self) -> Symbols {
[INFO] [stdout]     |                ^^^^^     ^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                |
[INFO] [stdout]     |                the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 109 |     fn symbols(&self) -> Symbols<'_> {
[INFO] [stdout]     |                                 ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 5.83s
[INFO] running `Command { std: "docker" "inspect" "e19c48af13fbdc9684470507ff7adfc7e53cd5b8a79de37f4bd6a17330833eff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e19c48af13fbdc9684470507ff7adfc7e53cd5b8a79de37f4bd6a17330833eff", kill_on_drop: false }`
[INFO] [stdout] e19c48af13fbdc9684470507ff7adfc7e53cd5b8a79de37f4bd6a17330833eff
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4415bceb1e1e6d65dc118da2908520ecfbd393f43521f59edcc8e5f2f2659f20
[INFO] running `Command { std: "docker" "start" "-a" "4415bceb1e1e6d65dc118da2908520ecfbd393f43521f59edcc8e5f2f2659f20", kill_on_drop: false }`
[INFO] [stderr]    Compiling aho-corasick v1.1.4
[INFO] [stderr]    Compiling humantime v1.3.0
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stdout] warning: unnecessary parentheses around pattern
[INFO] [stdout]   --> src/trace.rs:84:21
[INFO] [stdout]    |
[INFO] [stdout] 84 |                 let ((&x, rest)) = rest.split_first().unwrap();
[INFO] [stdout]    |                     ^          ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 84 -                 let ((&x, rest)) = rest.split_first().unwrap();
[INFO] [stdout] 84 +                 let (&x, rest) = rest.split_first().unwrap();
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `core::str::<impl str>::trim_left_matches`: superseded by `trim_start_matches`
[INFO] [stdout]   --> src/matchcode.rs:58:22
[INFO] [stdout]    |
[INFO] [stdout] 58 |         let x_id = x.trim_left_matches("IDENT_");
[INFO] [stdout]    |                      ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] help: replace the use of the deprecated method
[INFO] [stdout]    |
[INFO] [stdout] 58 -         let x_id = x.trim_left_matches("IDENT_");
[INFO] [stdout] 58 +         let x_id = x.trim_start_matches("IDENT_");
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `core::str::<impl str>::trim_left_matches`: superseded by `trim_start_matches`
[INFO] [stdout]   --> src/matchcode.rs:59:24
[INFO] [stdout]    |
[INFO] [stdout] 59 |         let x_expr = x.trim_left_matches("EXPR_");
[INFO] [stdout]    |                        ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] help: replace the use of the deprecated method
[INFO] [stdout]    |
[INFO] [stdout] 59 -         let x_expr = x.trim_left_matches("EXPR_");
[INFO] [stdout] 59 +         let x_expr = x.trim_start_matches("EXPR_");
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]    --> src/repr.rs:270:29
[INFO] [stdout]     |
[INFO] [stdout] 270 |     fn push_byte(&mut self, x: u8) {}
[INFO] [stdout]     |                             ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]    --> src/repr.rs:271:32
[INFO] [stdout]     |
[INFO] [stdout] 271 |     fn extend_bytes(&mut self, x: &[u8]) {}
[INFO] [stdout]     |                                ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Cont` is never constructed
[INFO] [stdout]   --> src/tokens.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | enum MacBodyState {
[INFO] [stdout]    |      ------------ variant in this enum
[INFO] [stdout] ...
[INFO] [stdout] 18 |     Cont,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `MacBodyState` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/matchcode.rs:259:42
[INFO] [stdout]     |
[INFO] [stdout] 259 | pub fn bind_expr(trace: ReTracer, stmts: &[syn::Stmt]) -> Bindings {
[INFO] [stdout]     |                                          ^^^^^^^^^^^^     ^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                                          |
[INFO] [stdout]     |                                          the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 259 | pub fn bind_expr(trace: ReTracer, stmts: &[syn::Stmt]) -> Bindings<'_> {
[INFO] [stdout]     |                                                                   ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/matchcode.rs:265:46
[INFO] [stdout]     |
[INFO] [stdout] 265 | pub fn bind_expr_expr(trace: ReTracer, expr: &syn::Expr) -> Bindings {
[INFO] [stdout]     |                                              ^^^^^^^^^^     ^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                                              |
[INFO] [stdout]     |                                              the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 265 | pub fn bind_expr_expr(trace: ReTracer, expr: &syn::Expr) -> Bindings<'_> {
[INFO] [stdout]     |                                                                     ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/repr.rs:41:9
[INFO] [stdout]    |
[INFO] [stdout] 41 |         write!(self.buf, "${}", x);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 41 |         let _ = write!(self.buf, "${}", x);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/repr.rs:47:9
[INFO] [stdout]    |
[INFO] [stdout] 47 |         write!(self.buf, "{}", s);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 47 |         let _ = write!(self.buf, "{}", s);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/repr.rs:53:9
[INFO] [stdout]    |
[INFO] [stdout] 53 |         write!(self.buf, "{}", s);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 53 |         let _ = write!(self.buf, "{}", s);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/repr.rs:59:9
[INFO] [stdout]    |
[INFO] [stdout] 59 |         write!(self.buf, "{}{{", s);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 59 |         let _ = write!(self.buf, "{}{{", s);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/repr.rs:65:9
[INFO] [stdout]    |
[INFO] [stdout] 65 |         write!(self.buf, "}}");
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 65 |         let _ = write!(self.buf, "}}");
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/repr.rs:71:13
[INFO] [stdout]    |
[INFO] [stdout] 71 |             write!(self.buf, "\n");
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 71 |             let _ = write!(self.buf, "\n");
[INFO] [stdout]    |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/repr.rs:90:9
[INFO] [stdout]    |
[INFO] [stdout] 90 |         write!(buf, "[");
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 90 |         let _ = write!(buf, "[");
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/repr.rs:113:13
[INFO] [stdout]     |
[INFO] [stdout] 113 |             write!(self.buf, "]");
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 113 |             let _ = write!(self.buf, "]");
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/repr.rs:120:9
[INFO] [stdout]     |
[INFO] [stdout] 120 |         write!(self.buf, "\"${}\"", x);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 120 |         let _ = write!(self.buf, "\"${}\"", x);
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/repr.rs:126:9
[INFO] [stdout]     |
[INFO] [stdout] 126 |         write!(self.buf, "{}", s);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 126 |         let _ = write!(self.buf, "{}", s);
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/repr.rs:132:9
[INFO] [stdout]     |
[INFO] [stdout] 132 |         write!(self.buf, "\"{}\"", s);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 132 |         let _ = write!(self.buf, "\"{}\"", s);
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/repr.rs:138:9
[INFO] [stdout]     |
[INFO] [stdout] 138 |         write!(self.buf, "[\"{}\"", s);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 138 |         let _ = write!(self.buf, "[\"{}\"", s);
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/repr.rs:143:9
[INFO] [stdout]     |
[INFO] [stdout] 143 |         write!(self.buf, "]");
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 143 |         let _ = write!(self.buf, "]");
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/trace.rs:22:15
[INFO] [stdout]    |
[INFO] [stdout] 22 |     fn traces(&self) -> Traces {
[INFO] [stdout]    |               ^^^^^     ^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |               |
[INFO] [stdout]    |               the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 22 |     fn traces(&self) -> Traces<'_> {
[INFO] [stdout]    |                               ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/trace.rs:109:16
[INFO] [stdout]     |
[INFO] [stdout] 109 |     fn symbols(&self) -> Symbols {
[INFO] [stdout]     |                ^^^^^     ^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                |
[INFO] [stdout]     |                the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 109 |     fn symbols(&self) -> Symbols<'_> {
[INFO] [stdout]     |                                 ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling regex-automata v0.4.13
[INFO] [stderr]    Compiling regex v1.12.2
[INFO] [stderr]    Compiling env_logger v0.5.13
[INFO] [stderr]    Compiling comacro v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around pattern
[INFO] [stdout]   --> src/trace.rs:84:21
[INFO] [stdout]    |
[INFO] [stdout] 84 |                 let ((&x, rest)) = rest.split_first().unwrap();
[INFO] [stdout]    |                     ^          ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 84 -                 let ((&x, rest)) = rest.split_first().unwrap();
[INFO] [stdout] 84 +                 let (&x, rest) = rest.split_first().unwrap();
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `core::str::<impl str>::trim_left_matches`: superseded by `trim_start_matches`
[INFO] [stdout]   --> src/matchcode.rs:58:22
[INFO] [stdout]    |
[INFO] [stdout] 58 |         let x_id = x.trim_left_matches("IDENT_");
[INFO] [stdout]    |                      ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] help: replace the use of the deprecated method
[INFO] [stdout]    |
[INFO] [stdout] 58 -         let x_id = x.trim_left_matches("IDENT_");
[INFO] [stdout] 58 +         let x_id = x.trim_start_matches("IDENT_");
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `core::str::<impl str>::trim_left_matches`: superseded by `trim_start_matches`
[INFO] [stdout]   --> src/matchcode.rs:59:24
[INFO] [stdout]    |
[INFO] [stdout] 59 |         let x_expr = x.trim_left_matches("EXPR_");
[INFO] [stdout]    |                        ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] help: replace the use of the deprecated method
[INFO] [stdout]    |
[INFO] [stdout] 59 -         let x_expr = x.trim_left_matches("EXPR_");
[INFO] [stdout] 59 +         let x_expr = x.trim_start_matches("EXPR_");
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]    --> src/repr.rs:270:29
[INFO] [stdout]     |
[INFO] [stdout] 270 |     fn push_byte(&mut self, x: u8) {}
[INFO] [stdout]     |                             ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]    --> src/repr.rs:271:32
[INFO] [stdout]     |
[INFO] [stdout] 271 |     fn extend_bytes(&mut self, x: &[u8]) {}
[INFO] [stdout]     |                                ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Cont` is never constructed
[INFO] [stdout]   --> src/tokens.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | enum MacBodyState {
[INFO] [stdout]    |      ------------ variant in this enum
[INFO] [stdout] ...
[INFO] [stdout] 18 |     Cont,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `MacBodyState` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/matchcode.rs:259:42
[INFO] [stdout]     |
[INFO] [stdout] 259 | pub fn bind_expr(trace: ReTracer, stmts: &[syn::Stmt]) -> Bindings {
[INFO] [stdout]     |                                          ^^^^^^^^^^^^     ^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                                          |
[INFO] [stdout]     |                                          the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 259 | pub fn bind_expr(trace: ReTracer, stmts: &[syn::Stmt]) -> Bindings<'_> {
[INFO] [stdout]     |                                                                   ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/matchcode.rs:265:46
[INFO] [stdout]     |
[INFO] [stdout] 265 | pub fn bind_expr_expr(trace: ReTracer, expr: &syn::Expr) -> Bindings {
[INFO] [stdout]     |                                              ^^^^^^^^^^     ^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                                              |
[INFO] [stdout]     |                                              the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 265 | pub fn bind_expr_expr(trace: ReTracer, expr: &syn::Expr) -> Bindings<'_> {
[INFO] [stdout]     |                                                                     ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/repr.rs:41:9
[INFO] [stdout]    |
[INFO] [stdout] 41 |         write!(self.buf, "${}", x);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 41 |         let _ = write!(self.buf, "${}", x);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/repr.rs:47:9
[INFO] [stdout]    |
[INFO] [stdout] 47 |         write!(self.buf, "{}", s);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 47 |         let _ = write!(self.buf, "{}", s);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/repr.rs:53:9
[INFO] [stdout]    |
[INFO] [stdout] 53 |         write!(self.buf, "{}", s);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 53 |         let _ = write!(self.buf, "{}", s);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/repr.rs:59:9
[INFO] [stdout]    |
[INFO] [stdout] 59 |         write!(self.buf, "{}{{", s);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 59 |         let _ = write!(self.buf, "{}{{", s);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/repr.rs:65:9
[INFO] [stdout]    |
[INFO] [stdout] 65 |         write!(self.buf, "}}");
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 65 |         let _ = write!(self.buf, "}}");
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/repr.rs:71:13
[INFO] [stdout]    |
[INFO] [stdout] 71 |             write!(self.buf, "\n");
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 71 |             let _ = write!(self.buf, "\n");
[INFO] [stdout]    |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/repr.rs:90:9
[INFO] [stdout]    |
[INFO] [stdout] 90 |         write!(buf, "[");
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 90 |         let _ = write!(buf, "[");
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/repr.rs:113:13
[INFO] [stdout]     |
[INFO] [stdout] 113 |             write!(self.buf, "]");
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 113 |             let _ = write!(self.buf, "]");
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/repr.rs:120:9
[INFO] [stdout]     |
[INFO] [stdout] 120 |         write!(self.buf, "\"${}\"", x);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 120 |         let _ = write!(self.buf, "\"${}\"", x);
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/repr.rs:126:9
[INFO] [stdout]     |
[INFO] [stdout] 126 |         write!(self.buf, "{}", s);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 126 |         let _ = write!(self.buf, "{}", s);
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/repr.rs:132:9
[INFO] [stdout]     |
[INFO] [stdout] 132 |         write!(self.buf, "\"{}\"", s);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 132 |         let _ = write!(self.buf, "\"{}\"", s);
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/repr.rs:138:9
[INFO] [stdout]     |
[INFO] [stdout] 138 |         write!(self.buf, "[\"{}\"", s);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 138 |         let _ = write!(self.buf, "[\"{}\"", s);
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/repr.rs:143:9
[INFO] [stdout]     |
[INFO] [stdout] 143 |         write!(self.buf, "]");
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 143 |         let _ = write!(self.buf, "]");
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/trace.rs:22:15
[INFO] [stdout]    |
[INFO] [stdout] 22 |     fn traces(&self) -> Traces {
[INFO] [stdout]    |               ^^^^^     ^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |               |
[INFO] [stdout]    |               the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 22 |     fn traces(&self) -> Traces<'_> {
[INFO] [stdout]    |                               ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/trace.rs:109:16
[INFO] [stdout]     |
[INFO] [stdout] 109 |     fn symbols(&self) -> Symbols {
[INFO] [stdout]     |                ^^^^^     ^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                |
[INFO] [stdout]     |                the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 109 |     fn symbols(&self) -> Symbols<'_> {
[INFO] [stdout]     |                                 ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 7.56s
[INFO] running `Command { std: "docker" "inspect" "4415bceb1e1e6d65dc118da2908520ecfbd393f43521f59edcc8e5f2f2659f20", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4415bceb1e1e6d65dc118da2908520ecfbd393f43521f59edcc8e5f2f2659f20", kill_on_drop: false }`
[INFO] [stdout] 4415bceb1e1e6d65dc118da2908520ecfbd393f43521f59edcc8e5f2f2659f20
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 58bed340a3ac84089e8b7d10faf62bb0f999c7e6bd948734249cf80f935b80a3
[INFO] running `Command { std: "docker" "start" "-a" "58bed340a3ac84089e8b7d10faf62bb0f999c7e6bd948734249cf80f935b80a3", kill_on_drop: false }`
[INFO] [stderr] warning: unnecessary parentheses around pattern
[INFO] [stderr]   --> src/trace.rs:84:21
[INFO] [stderr]    |
[INFO] [stderr] 84 |                 let ((&x, rest)) = rest.split_first().unwrap();
[INFO] [stderr]    |                     ^          ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr] 84 -                 let ((&x, rest)) = rest.split_first().unwrap();
[INFO] [stderr] 84 +                 let (&x, rest) = rest.split_first().unwrap();
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated method `core::str::<impl str>::trim_left_matches`: superseded by `trim_start_matches`
[INFO] [stderr]   --> src/matchcode.rs:58:22
[INFO] [stderr]    |
[INFO] [stderr] 58 |         let x_id = x.trim_left_matches("IDENT_");
[INFO] [stderr]    |                      ^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] help: replace the use of the deprecated method
[INFO] [stderr]    |
[INFO] [stderr] 58 -         let x_id = x.trim_left_matches("IDENT_");
[INFO] [stderr] 58 +         let x_id = x.trim_start_matches("IDENT_");
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated method `core::str::<impl str>::trim_left_matches`: superseded by `trim_start_matches`
[INFO] [stderr]   --> src/matchcode.rs:59:24
[INFO] [stderr]    |
[INFO] [stderr] 59 |         let x_expr = x.trim_left_matches("EXPR_");
[INFO] [stderr]    |                        ^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr] help: replace the use of the deprecated method
[INFO] [stderr]    |
[INFO] [stderr] 59 -         let x_expr = x.trim_left_matches("EXPR_");
[INFO] [stderr] 59 +         let x_expr = x.trim_start_matches("EXPR_");
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]    --> src/repr.rs:270:29
[INFO] [stderr]     |
[INFO] [stderr] 270 |     fn push_byte(&mut self, x: u8) {}
[INFO] [stderr]     |                             ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]    --> src/repr.rs:271:32
[INFO] [stderr]     |
[INFO] [stderr] 271 |     fn extend_bytes(&mut self, x: &[u8]) {}
[INFO] [stderr]     |                                ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stderr] 
[INFO] [stderr] warning: variant `Cont` is never constructed
[INFO] [stderr]   --> src/tokens.rs:18:5
[INFO] [stderr]    |
[INFO] [stderr] 15 | enum MacBodyState {
[INFO] [stderr]    |      ------------ variant in this enum
[INFO] [stderr] ...
[INFO] [stderr] 18 |     Cont,
[INFO] [stderr]    |     ^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `MacBodyState` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]    --> src/matchcode.rs:259:42
[INFO] [stderr]     |
[INFO] [stderr] 259 | pub fn bind_expr(trace: ReTracer, stmts: &[syn::Stmt]) -> Bindings {
[INFO] [stderr]     |                                          ^^^^^^^^^^^^     ^^^^^^^^ the same lifetime is hidden here
[INFO] [stderr]     |                                          |
[INFO] [stderr]     |                                          the lifetime is elided here
[INFO] [stderr]     |
[INFO] [stderr]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stderr]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stderr] help: use `'_` for type paths
[INFO] [stderr]     |
[INFO] [stderr] 259 | pub fn bind_expr(trace: ReTracer, stmts: &[syn::Stmt]) -> Bindings<'_> {
[INFO] [stderr]     |                                                                   ++++
[INFO] [stderr] 
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]    --> src/matchcode.rs:265:46
[INFO] [stderr]     |
[INFO] [stderr] 265 | pub fn bind_expr_expr(trace: ReTracer, expr: &syn::Expr) -> Bindings {
[INFO] [stderr]     |                                              ^^^^^^^^^^     ^^^^^^^^ the same lifetime is hidden here
[INFO] [stderr]     |                                              |
[INFO] [stderr]     |                                              the lifetime is elided here
[INFO] [stderr]     |
[INFO] [stderr]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stderr] help: use `'_` for type paths
[INFO] [stderr]     |
[INFO] [stderr] 265 | pub fn bind_expr_expr(trace: ReTracer, expr: &syn::Expr) -> Bindings<'_> {
[INFO] [stderr]     |                                                                     ++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/repr.rs:41:9
[INFO] [stderr]    |
[INFO] [stderr] 41 |         write!(self.buf, "${}", x);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]    |
[INFO] [stderr] 41 |         let _ = write!(self.buf, "${}", x);
[INFO] [stderr]    |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/repr.rs:47:9
[INFO] [stderr]    |
[INFO] [stderr] 47 |         write!(self.buf, "{}", s);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]    |
[INFO] [stderr] 47 |         let _ = write!(self.buf, "{}", s);
[INFO] [stderr]    |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/repr.rs:53:9
[INFO] [stderr]    |
[INFO] [stderr] 53 |         write!(self.buf, "{}", s);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]    |
[INFO] [stderr] 53 |         let _ = write!(self.buf, "{}", s);
[INFO] [stderr]    |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/repr.rs:59:9
[INFO] [stderr]    |
[INFO] [stderr] 59 |         write!(self.buf, "{}{{", s);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]    |
[INFO] [stderr] 59 |         let _ = write!(self.buf, "{}{{", s);
[INFO] [stderr]    |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/repr.rs:65:9
[INFO] [stderr]    |
[INFO] [stderr] 65 |         write!(self.buf, "}}");
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]    |
[INFO] [stderr] 65 |         let _ = write!(self.buf, "}}");
[INFO] [stderr]    |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/repr.rs:71:13
[INFO] [stderr]    |
[INFO] [stderr] 71 |             write!(self.buf, "\n");
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]    |
[INFO] [stderr] 71 |             let _ = write!(self.buf, "\n");
[INFO] [stderr]    |             +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/repr.rs:90:9
[INFO] [stderr]    |
[INFO] [stderr] 90 |         write!(buf, "[");
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]    |
[INFO] [stderr] 90 |         let _ = write!(buf, "[");
[INFO] [stderr]    |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/repr.rs:113:13
[INFO] [stderr]     |
[INFO] [stderr] 113 |             write!(self.buf, "]");
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 113 |             let _ = write!(self.buf, "]");
[INFO] [stderr]     |             +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/repr.rs:120:9
[INFO] [stderr]     |
[INFO] [stderr] 120 |         write!(self.buf, "\"${}\"", x);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 120 |         let _ = write!(self.buf, "\"${}\"", x);
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/repr.rs:126:9
[INFO] [stderr]     |
[INFO] [stderr] 126 |         write!(self.buf, "{}", s);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 126 |         let _ = write!(self.buf, "{}", s);
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/repr.rs:132:9
[INFO] [stderr]     |
[INFO] [stderr] 132 |         write!(self.buf, "\"{}\"", s);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 132 |         let _ = write!(self.buf, "\"{}\"", s);
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/repr.rs:138:9
[INFO] [stderr]     |
[INFO] [stderr] 138 |         write!(self.buf, "[\"{}\"", s);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 138 |         let _ = write!(self.buf, "[\"{}\"", s);
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/repr.rs:143:9
[INFO] [stderr]     |
[INFO] [stderr] 143 |         write!(self.buf, "]");
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 143 |         let _ = write!(self.buf, "]");
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]   --> src/trace.rs:22:15
[INFO] [stderr]    |
[INFO] [stderr] 22 |     fn traces(&self) -> Traces {
[INFO] [stderr]    |               ^^^^^     ^^^^^^ the same lifetime is hidden here
[INFO] [stderr]    |               |
[INFO] [stderr]    |               the lifetime is elided here
[INFO] [stderr]    |
[INFO] [stderr]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stderr] help: use `'_` for type paths
[INFO] [stderr]    |
[INFO] [stderr] 22 |     fn traces(&self) -> Traces<'_> {
[INFO] [stderr]    |                               ++++
[INFO] [stderr] 
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]    --> src/trace.rs:109:16
[INFO] [stderr]     |
[INFO] [stderr] 109 |     fn symbols(&self) -> Symbols {
[INFO] [stderr]     |                ^^^^^     ^^^^^^^ the same lifetime is hidden here
[INFO] [stderr]     |                |
[INFO] [stderr]     |                the lifetime is elided here
[INFO] [stderr]     |
[INFO] [stderr]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stderr] help: use `'_` for type paths
[INFO] [stderr]     |
[INFO] [stderr] 109 |     fn symbols(&self) -> Symbols<'_> {
[INFO] [stderr]     |                                 ++++
[INFO] [stderr] 
[INFO] [stderr] warning: `comacro` (lib) generated 23 warnings (run `cargo fix --lib -p comacro` to apply 9 suggestions)
[INFO] [stderr] warning: `comacro` (lib test) generated 23 warnings (23 duplicates)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.08s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/comacro-05c5c249af28c5ac)
[INFO] [stderr]    Doc-tests comacro
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr] warning: unnecessary parentheses around pattern
[INFO] [stderr]   --> src/trace.rs:84:21
[INFO] [stderr]    |
[INFO] [stderr] 84 |                 let ((&x, rest)) = rest.split_first().unwrap();
[INFO] [stderr]    |                     ^          ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr] 84 -                 let ((&x, rest)) = rest.split_first().unwrap();
[INFO] [stderr] 84 +                 let (&x, rest) = rest.split_first().unwrap();
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "58bed340a3ac84089e8b7d10faf62bb0f999c7e6bd948734249cf80f935b80a3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "58bed340a3ac84089e8b7d10faf62bb0f999c7e6bd948734249cf80f935b80a3", kill_on_drop: false }`
[INFO] [stdout] 58bed340a3ac84089e8b7d10faf62bb0f999c7e6bd948734249cf80f935b80a3
