[INFO] fetching crate list_flattener 0.3.0...
[INFO] testing list_flattener-0.3.0 against try#b83b707f97d809763b7861afa7638871f3339a33 for pr-145838-1
[INFO] extracting crate list_flattener 0.3.0 into /workspace/builds/worker-0-tc2/source
[INFO] started tweaking crates.io crate list_flattener 0.3.0
[INFO] finished tweaking crates.io crate list_flattener 0.3.0
[INFO] tweaked toml for crates.io crate list_flattener 0.3.0 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate list_flattener 0.3.0 on toolchain b83b707f97d809763b7861afa7638871f3339a33
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b83b707f97d809763b7861afa7638871f3339a33" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate list_flattener 0.3.0 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" "+b83b707f97d809763b7861afa7638871f3339a33" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+b83b707f97d809763b7861afa7638871f3339a33" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] cb8e0375ea0168841b8d89b4720763450bd618e34c44306255d42ab03de04c79
[INFO] running `Command { std: "docker" "start" "-a" "cb8e0375ea0168841b8d89b4720763450bd618e34c44306255d42ab03de04c79", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cb8e0375ea0168841b8d89b4720763450bd618e34c44306255d42ab03de04c79", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cb8e0375ea0168841b8d89b4720763450bd618e34c44306255d42ab03de04c79", kill_on_drop: false }`
[INFO] [stdout] cb8e0375ea0168841b8d89b4720763450bd618e34c44306255d42ab03de04c79
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+b83b707f97d809763b7861afa7638871f3339a33" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7ceed11beba470f3b12201e1a45935b0b0cf1ad88f41559b458fb6ad4e02a711
[INFO] running `Command { std: "docker" "start" "-a" "7ceed11beba470f3b12201e1a45935b0b0cf1ad88f41559b458fb6ad4e02a711", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.0.0
[INFO] [stderr]    Compiling num-traits v0.2.11
[INFO] [stderr]    Compiling parse_int v0.4.0
[INFO] [stderr]    Compiling list_flattener v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> src/lib.rs:22:38
[INFO] [stdout]    |
[INFO] [stdout] 22 |     pub fn iter<'a>(&'a self) -> Box<(dyn Iterator<Item = isize> + 'a)> {
[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] 22 -     pub fn iter<'a>(&'a self) -> Box<(dyn Iterator<Item = isize> + 'a)> {
[INFO] [stdout] 22 +     pub fn iter<'a>(&'a self) -> Box<dyn Iterator<Item = isize> + 'a> {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.08s
[INFO] running `Command { std: "docker" "inspect" "7ceed11beba470f3b12201e1a45935b0b0cf1ad88f41559b458fb6ad4e02a711", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7ceed11beba470f3b12201e1a45935b0b0cf1ad88f41559b458fb6ad4e02a711", kill_on_drop: false }`
[INFO] [stdout] 7ceed11beba470f3b12201e1a45935b0b0cf1ad88f41559b458fb6ad4e02a711
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+b83b707f97d809763b7861afa7638871f3339a33" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e23a86969b2329f75cae494295ff2d187f80293bbbbc243c7e075ef1a9ab3b04
[INFO] running `Command { std: "docker" "start" "-a" "e23a86969b2329f75cae494295ff2d187f80293bbbbc243c7e075ef1a9ab3b04", kill_on_drop: false }`
[INFO] [stderr]    Compiling ansi_term v0.11.0
[INFO] [stderr]    Compiling difference v2.0.0
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> src/lib.rs:22:38
[INFO] [stdout]    |
[INFO] [stdout] 22 |     pub fn iter<'a>(&'a self) -> Box<(dyn Iterator<Item = isize> + 'a)> {
[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] 22 -     pub fn iter<'a>(&'a self) -> Box<(dyn Iterator<Item = isize> + 'a)> {
[INFO] [stdout] 22 +     pub fn iter<'a>(&'a self) -> Box<dyn Iterator<Item = isize> + 'a> {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling pretty_assertions v0.6.1
[INFO] [stderr]    Compiling list_flattener v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> src/lib.rs:22:38
[INFO] [stdout]    |
[INFO] [stdout] 22 |     pub fn iter<'a>(&'a self) -> Box<(dyn Iterator<Item = isize> + 'a)> {
[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] 22 -     pub fn iter<'a>(&'a self) -> Box<(dyn Iterator<Item = isize> + 'a)> {
[INFO] [stdout] 22 +     pub fn iter<'a>(&'a self) -> Box<dyn Iterator<Item = isize> + 'a> {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 1.30s
[INFO] running `Command { std: "docker" "inspect" "e23a86969b2329f75cae494295ff2d187f80293bbbbc243c7e075ef1a9ab3b04", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e23a86969b2329f75cae494295ff2d187f80293bbbbc243c7e075ef1a9ab3b04", kill_on_drop: false }`
[INFO] [stdout] e23a86969b2329f75cae494295ff2d187f80293bbbbc243c7e075ef1a9ab3b04
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+b83b707f97d809763b7861afa7638871f3339a33" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] b2867f4aefac5dc40a7e2edfd24fb86179512fe9f1eecf439f7e7f04d5cdd9c3
[INFO] running `Command { std: "docker" "start" "-a" "b2867f4aefac5dc40a7e2edfd24fb86179512fe9f1eecf439f7e7f04d5cdd9c3", kill_on_drop: false }`
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stdout] 
[INFO] [stderr]   --> src/lib.rs:22:38
[INFO] [stdout] running 21 tests
[INFO] [stderr]    |
[INFO] [stdout] test test_e2e::deep ... ok
[INFO] [stderr] 22 |     pub fn iter<'a>(&'a self) -> Box<(dyn Iterator<Item = isize> + 'a)> {
[INFO] [stdout] test test_e2e::deep_hex ... ok
[INFO] [stderr]    |                                      ^                               ^
[INFO] [stdout] test test_flatter::descending ... ok
[INFO] [stderr]    |
[INFO] [stdout] test test_flatter::flat_flat ... ok
[INFO] [stderr]    = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] test test_parser::decreasing_nested_list ... ok
[INFO] [stderr] help: remove these parentheses
[INFO] [stdout] test test_flatter::single ... ok
[INFO] [stderr]    |
[INFO] [stdout] test test_parser::empty_list ... ok
[INFO] [stderr] 22 -     pub fn iter<'a>(&'a self) -> Box<(dyn Iterator<Item = isize> + 'a)> {
[INFO] [stdout] test test_parser::incomplete_input ... ok
[INFO] [stderr] 22 +     pub fn iter<'a>(&'a self) -> Box<dyn Iterator<Item = isize> + 'a> {
[INFO] [stdout] test test_parser::increasing_nested_list ... ok
[INFO] [stderr]    |
[INFO] [stdout] test test_parser::invalid_element ... ok
[INFO] [stderr] 
[INFO] [stderr] warning: `list_flattener` (lib) generated 1 warning (run `cargo fix --lib -p list_flattener` to apply 1 suggestion)
[INFO] [stderr] warning: `list_flattener` (lib test) generated 1 warning (1 duplicate)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/list_flattener-a55ea4c0927ba249)
[INFO] [stdout] test test_flatter::ascending ... ok
[INFO] [stdout] test test_parser::just_closed ... ok
[INFO] [stdout] test test_parser::linear_list_trim ... ok
[INFO] [stdout] test test_parser::missing_comma ... ok
[INFO] [stdout] test test_parser::naked_num ... ok
[INFO] [stdout] test test_parser::tailing_input ... ok
[INFO] [stdout] test test_parser_tools::do_peek ... ok
[INFO] [stdout] test test_parser_tools::do_skip_whitespace ... ok
[INFO] [stdout] test test_parser_tools::incomplete_peek ... ok
[INFO] [stdout] test test_parser::naked_hex_num ... ok
[INFO] [stdout] test test_parser::linear_list ... ok
[INFO] [stderr]      Running unittests src/bin/list_flattener.rs (/opt/rustwide/target/debug/deps/list_flattener-70bf71dff3ca20ac)
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 21 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.05s
[INFO] [stdout] 
[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]    Doc-tests list_flattener
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stdout] 
[INFO] [stderr]   --> src/lib.rs:22:38
[INFO] [stdout] running 0 tests
[INFO] [stderr]    |
[INFO] [stdout] 
[INFO] [stderr] 22 |     pub fn iter<'a>(&'a self) -> Box<(dyn Iterator<Item = isize> + 'a)> {
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stderr]    |                                      ^                               ^
[INFO] [stdout] 
[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] 22 -     pub fn iter<'a>(&'a self) -> Box<(dyn Iterator<Item = isize> + 'a)> {
[INFO] [stderr] 22 +     pub fn iter<'a>(&'a self) -> Box<dyn Iterator<Item = isize> + 'a> {
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] running `Command { std: "docker" "inspect" "b2867f4aefac5dc40a7e2edfd24fb86179512fe9f1eecf439f7e7f04d5cdd9c3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b2867f4aefac5dc40a7e2edfd24fb86179512fe9f1eecf439f7e7f04d5cdd9c3", kill_on_drop: false }`
[INFO] [stdout] b2867f4aefac5dc40a7e2edfd24fb86179512fe9f1eecf439f7e7f04d5cdd9c3