[INFO] fetching crate flowlang 0.3.14...
[INFO] checking flowlang-0.3.14 against try#24cd45d7714ba43afd4b8e62fb677b069b21c4a5 for pr-129543
[INFO] extracting crate flowlang 0.3.14 into /workspace/builds/worker-4-tc2/source
[INFO] validating manifest of crates.io crate flowlang 0.3.14 on toolchain 24cd45d7714ba43afd4b8e62fb677b069b21c4a5
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+24cd45d7714ba43afd4b8e62fb677b069b21c4a5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate flowlang 0.3.14
[INFO] finished tweaking crates.io crate flowlang 0.3.14
[INFO] tweaked toml for crates.io crate flowlang 0.3.14 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] crate crates.io crate flowlang 0.3.14 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" "+24cd45d7714ba43afd4b8e62fb677b069b21c4a5" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+24cd45d7714ba43afd4b8e62fb677b069b21c4a5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3d30ac238c8fa442aec3185099e4f35b1938b0740956cda5718b4804ebd4bac6
[INFO] running `Command { std: "docker" "start" "-a" "3d30ac238c8fa442aec3185099e4f35b1938b0740956cda5718b4804ebd4bac6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3d30ac238c8fa442aec3185099e4f35b1938b0740956cda5718b4804ebd4bac6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3d30ac238c8fa442aec3185099e4f35b1938b0740956cda5718b4804ebd4bac6", kill_on_drop: false }`
[INFO] [stdout] 3d30ac238c8fa442aec3185099e4f35b1938b0740956cda5718b4804ebd4bac6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+24cd45d7714ba43afd4b8e62fb677b069b21c4a5" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a70395c65e46ccd701259aa8e938154d342d7c7c12b72103e3bfbedac4da4047
[INFO] running `Command { std: "docker" "start" "-a" "a70395c65e46ccd701259aa8e938154d342d7c7c12b72103e3bfbedac4da4047", kill_on_drop: false }`
[INFO] [stderr]     Checking ndata v0.3.10
[INFO] [stderr]     Checking flowlang v0.3.14 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::fs::create_dir_all`
[INFO] [stdout]   --> src/buildrust.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | use std::fs::create_dir_all;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `match` scrutinee expression
[INFO] [stdout]    --> src/buildrust.rs:650:38
[INFO] [stdout]     |
[INFO] [stdout] 650 |                         let q = match(ntype.as_ref()) {
[INFO] [stdout]     |                                      ^              ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 650 -                         let q = match(ntype.as_ref()) {
[INFO] [stdout] 650 +                         let q = match ntype.as_ref() {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `match` scrutinee expression
[INFO] [stdout]    --> src/buildrust.rs:654:38
[INFO] [stdout]     |
[INFO] [stdout] 654 |                         let x = match(ntype.as_ref()) {
[INFO] [stdout]     |                                      ^              ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 654 -                         let x = match(ntype.as_ref()) {
[INFO] [stdout] 654 +                         let x = match ntype.as_ref() {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fs::create_dir_all`
[INFO] [stdout]   --> src/buildrust.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | use std::fs::create_dir_all;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `match` scrutinee expression
[INFO] [stdout]    --> src/buildrust.rs:650:38
[INFO] [stdout]     |
[INFO] [stdout] 650 |                         let q = match(ntype.as_ref()) {
[INFO] [stdout]     |                                      ^              ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 650 -                         let q = match(ntype.as_ref()) {
[INFO] [stdout] 650 +                         let q = match ntype.as_ref() {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `match` scrutinee expression
[INFO] [stdout]    --> src/buildrust.rs:654:38
[INFO] [stdout]     |
[INFO] [stdout] 654 |                         let x = match(ntype.as_ref()) {
[INFO] [stdout]     |                                      ^              ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 654 -                         let x = match(ntype.as_ref()) {
[INFO] [stdout] 654 +                         let x = match ntype.as_ref() {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `b` is never read
[INFO] [stdout]   --> src/buildrust.rs:30:11
[INFO] [stdout]    |
[INFO] [stdout] 30 |   let mut b = false;
[INFO] [stdout]    |           ^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `b` is never read
[INFO] [stdout]   --> src/buildrust.rs:54:49
[INFO] [stdout]    |
[INFO] [stdout] 54 |             if build(&lib, &ctl, &cmd, &root) { b = true; }
[INFO] [stdout]    |                                                 ^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `root`
[INFO] [stdout]    --> src/buildrust.rs:608:11
[INFO] [stdout]     |
[INFO] [stdout] 608 |       let root = store.get_lib_root(&lib);
[INFO] [stdout]     |           ^^^^ help: if this is intentional, prefix it with an underscore: `_root`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `b` is never read
[INFO] [stdout]   --> src/buildrust.rs:30:11
[INFO] [stdout]    |
[INFO] [stdout] 30 |   let mut b = false;
[INFO] [stdout]    |           ^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `b` is never read
[INFO] [stdout]   --> src/buildrust.rs:54:49
[INFO] [stdout]    |
[INFO] [stdout] 54 |             if build(&lib, &ctl, &cmd, &root) { b = true; }
[INFO] [stdout]    |                                                 ^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `root`
[INFO] [stdout]    --> src/buildrust.rs:608:11
[INFO] [stdout]     |
[INFO] [stdout] 608 |       let root = store.get_lib_root(&lib);
[INFO] [stdout]     |           ^^^^ help: if this is intentional, prefix it with an underscore: `_root`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fs::create_dir_all`
[INFO] [stdout]   --> src/buildrust.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | use std::fs::create_dir_all;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `match` scrutinee expression
[INFO] [stdout]    --> src/buildrust.rs:650:38
[INFO] [stdout]     |
[INFO] [stdout] 650 |                         let q = match(ntype.as_ref()) {
[INFO] [stdout]     |                                      ^              ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 650 -                         let q = match(ntype.as_ref()) {
[INFO] [stdout] 650 +                         let q = match ntype.as_ref() {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `match` scrutinee expression
[INFO] [stdout]    --> src/buildrust.rs:654:38
[INFO] [stdout]     |
[INFO] [stdout] 654 |                         let x = match(ntype.as_ref()) {
[INFO] [stdout]     |                                      ^              ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 654 -                         let x = match(ntype.as_ref()) {
[INFO] [stdout] 654 +                         let x = match ntype.as_ref() {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fs::create_dir_all`
[INFO] [stdout]   --> src/buildrust.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | use std::fs::create_dir_all;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `match` scrutinee expression
[INFO] [stdout]    --> src/buildrust.rs:650:38
[INFO] [stdout]     |
[INFO] [stdout] 650 |                         let q = match(ntype.as_ref()) {
[INFO] [stdout]     |                                      ^              ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 650 -                         let q = match(ntype.as_ref()) {
[INFO] [stdout] 650 +                         let q = match ntype.as_ref() {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `match` scrutinee expression
[INFO] [stdout]    --> src/buildrust.rs:654:38
[INFO] [stdout]     |
[INFO] [stdout] 654 |                         let x = match(ntype.as_ref()) {
[INFO] [stdout]     |                                      ^              ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 654 -                         let x = match(ntype.as_ref()) {
[INFO] [stdout] 654 +                         let x = match ntype.as_ref() {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `b` is never read
[INFO] [stdout]   --> src/buildrust.rs:30:11
[INFO] [stdout]    |
[INFO] [stdout] 30 |   let mut b = false;
[INFO] [stdout]    |           ^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `b` is never read
[INFO] [stdout]   --> src/buildrust.rs:54:49
[INFO] [stdout]    |
[INFO] [stdout] 54 |             if build(&lib, &ctl, &cmd, &root) { b = true; }
[INFO] [stdout]    |                                                 ^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `root`
[INFO] [stdout]    --> src/buildrust.rs:608:11
[INFO] [stdout]     |
[INFO] [stdout] 608 |       let root = store.get_lib_root(&lib);
[INFO] [stdout]     |           ^^^^ help: if this is intentional, prefix it with an underscore: `_root`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `b` is never read
[INFO] [stdout]   --> src/buildrust.rs:30:11
[INFO] [stdout]    |
[INFO] [stdout] 30 |   let mut b = false;
[INFO] [stdout]    |           ^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `b` is never read
[INFO] [stdout]   --> src/buildrust.rs:54:49
[INFO] [stdout]    |
[INFO] [stdout] 54 |             if build(&lib, &ctl, &cmd, &root) { b = true; }
[INFO] [stdout]    |                                                 ^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `root`
[INFO] [stdout]    --> src/buildrust.rs:608:11
[INFO] [stdout]     |
[INFO] [stdout] 608 |       let root = store.get_lib_root(&lib);
[INFO] [stdout]     |           ^^^^ help: if this is intentional, prefix it with an underscore: `_root`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.52s
[INFO] running `Command { std: "docker" "inspect" "a70395c65e46ccd701259aa8e938154d342d7c7c12b72103e3bfbedac4da4047", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a70395c65e46ccd701259aa8e938154d342d7c7c12b72103e3bfbedac4da4047", kill_on_drop: false }`
[INFO] [stdout] a70395c65e46ccd701259aa8e938154d342d7c7c12b72103e3bfbedac4da4047