[INFO] fetching crate tuple_utils 0.4.0...
[INFO] testing tuple_utils-0.4.0 against master#62efba8a050c64249dab942951bb28f710208bc8 for pr-90799
[INFO] extracting crate tuple_utils 0.4.0 into /workspace/builds/worker-26/source
[INFO] validating manifest of crates.io crate tuple_utils 0.4.0 on toolchain 62efba8a050c64249dab942951bb28f710208bc8
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate tuple_utils 0.4.0
[INFO] finished tweaking crates.io crate tuple_utils 0.4.0
[INFO] tweaked toml for crates.io crate tuple_utils 0.4.0 written to /workspace/builds/worker-26/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-26/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-26/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:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 415973ba958822dd098ebe4bb10aade6c22ce9d849d5a541e48fe371c1a5ed2d
[INFO] running `Command { std: "docker" "start" "-a" "415973ba958822dd098ebe4bb10aade6c22ce9d849d5a541e48fe371c1a5ed2d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "415973ba958822dd098ebe4bb10aade6c22ce9d849d5a541e48fe371c1a5ed2d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "415973ba958822dd098ebe4bb10aade6c22ce9d849d5a541e48fe371c1a5ed2d", kill_on_drop: false }`
[INFO] [stdout] 415973ba958822dd098ebe4bb10aade6c22ce9d849d5a541e48fe371c1a5ed2d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-26/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-26/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a6588678a5d0e1dcfea7124feb16276bb797801c23be50e7712a7f2367dba27d
[INFO] running `Command { std: "docker" "start" "-a" "a6588678a5d0e1dcfea7124feb16276bb797801c23be50e7712a7f2367dba27d", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling tuple_utils v0.4.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/lib.rs:45:27
[INFO] [stdout]     |
[INFO] [stdout] 45  |               type Output = ( $( $from ,)*  T);
[INFO] [stdout]     |                             ^                ^
[INFO] [stdout] ...
[INFO] [stdout] 110 |   for_each_prefix! {
[INFO] [stdout]     |  _-
[INFO] [stdout]     | |_|
[INFO] [stdout]     | |
[INFO] [stdout] 111 | |     tuple_impl,
[INFO] [stdout] 112 | |     [(T0), (T1), (T2), (T3), (T4), (T5), (T6), (T7), (T8), (T9), (T10), (T11), (T12), (T13), (T14), (T15),]
[INFO] [stdout] 113 | | }
[INFO] [stdout]     | | -
[INFO] [stdout]     | |_|
[INFO] [stdout]     | |_in this macro invocation
[INFO] [stdout]     |   in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout]     = note: this warning originates in the macro `tuple_impl` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 45  -             type Output = ( $( $from ,)*  T);
[INFO] [stdout] 45  +             type Output =  $( $from ,)*  T;
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/lib.rs:49:38
[INFO] [stdout]     |
[INFO] [stdout] 49  |               fn append(self, x: T) -> ( $( $from ,)*  T) {
[INFO] [stdout]     |                                        ^                ^
[INFO] [stdout] ...
[INFO] [stdout] 110 |   for_each_prefix! {
[INFO] [stdout]     |  _-
[INFO] [stdout]     | |_|
[INFO] [stdout]     | |
[INFO] [stdout] 111 | |     tuple_impl,
[INFO] [stdout] 112 | |     [(T0), (T1), (T2), (T3), (T4), (T5), (T6), (T7), (T8), (T9), (T10), (T11), (T12), (T13), (T14), (T15),]
[INFO] [stdout] 113 | | }
[INFO] [stdout]     | | -
[INFO] [stdout]     | |_|
[INFO] [stdout]     | |_in this macro invocation
[INFO] [stdout]     |   in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `tuple_impl` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 49  -             fn append(self, x: T) -> ( $( $from ,)*  T) {
[INFO] [stdout] 49  +             fn append(self, x: T) ->  $( $from ,)*  T {
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.93s
[INFO] running `Command { std: "docker" "inspect" "a6588678a5d0e1dcfea7124feb16276bb797801c23be50e7712a7f2367dba27d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a6588678a5d0e1dcfea7124feb16276bb797801c23be50e7712a7f2367dba27d", kill_on_drop: false }`
[INFO] [stdout] a6588678a5d0e1dcfea7124feb16276bb797801c23be50e7712a7f2367dba27d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-26/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-26/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1c2f6070235163d775d21a4928b89a8d974ed4f1985df1e1699614b6c85fbe2e
[INFO] running `Command { std: "docker" "start" "-a" "1c2f6070235163d775d21a4928b89a8d974ed4f1985df1e1699614b6c85fbe2e", kill_on_drop: false }`
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/lib.rs:45:27
[INFO] [stdout]     |
[INFO] [stdout] 45  |               type Output = ( $( $from ,)*  T);
[INFO] [stdout]     |                             ^                ^
[INFO] [stdout] ...
[INFO] [stdout] 110 |   for_each_prefix! {
[INFO] [stdout]     |  _-
[INFO] [stdout]     | |_|
[INFO] [stdout]     | |
[INFO] [stdout] 111 | |     tuple_impl,
[INFO] [stdout] 112 | |     [(T0), (T1), (T2), (T3), (T4), (T5), (T6), (T7), (T8), (T9), (T10), (T11), (T12), (T13), (T14), (T15),]
[INFO] [stdout] 113 | | }
[INFO] [stdout]     | | -
[INFO] [stdout]     | |_|
[INFO] [stdout]     | |_in this macro invocation
[INFO] [stdout]     |   in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout]     = note: this warning originates in the macro `tuple_impl` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 45  -             type Output = ( $( $from ,)*  T);
[INFO] [stdout] 45  +             type Output =  $( $from ,)*  T;
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling tuple_utils v0.4.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/lib.rs:49:38
[INFO] [stdout]     |
[INFO] [stdout] 49  |               fn append(self, x: T) -> ( $( $from ,)*  T) {
[INFO] [stdout]     |                                        ^                ^
[INFO] [stdout] ...
[INFO] [stdout] 110 |   for_each_prefix! {
[INFO] [stdout]     |  _-
[INFO] [stdout]     | |_|
[INFO] [stdout]     | |
[INFO] [stdout] 111 | |     tuple_impl,
[INFO] [stdout] 112 | |     [(T0), (T1), (T2), (T3), (T4), (T5), (T6), (T7), (T8), (T9), (T10), (T11), (T12), (T13), (T14), (T15),]
[INFO] [stdout] 113 | | }
[INFO] [stdout]     | | -
[INFO] [stdout]     | |_|
[INFO] [stdout]     | |_in this macro invocation
[INFO] [stdout]     |   in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `tuple_impl` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 49  -             fn append(self, x: T) -> ( $( $from ,)*  T) {
[INFO] [stdout] 49  +             fn append(self, x: T) ->  $( $from ,)*  T {
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/lib.rs:45:27
[INFO] [stdout]     |
[INFO] [stdout] 45  |               type Output = ( $( $from ,)*  T);
[INFO] [stdout]     |                             ^                ^
[INFO] [stdout] ...
[INFO] [stdout] 110 |   for_each_prefix! {
[INFO] [stdout]     |  _-
[INFO] [stdout]     | |_|
[INFO] [stdout]     | |
[INFO] [stdout] 111 | |     tuple_impl,
[INFO] [stdout] 112 | |     [(T0), (T1), (T2), (T3), (T4), (T5), (T6), (T7), (T8), (T9), (T10), (T11), (T12), (T13), (T14), (T15),]
[INFO] [stdout] 113 | | }
[INFO] [stdout]     | | -
[INFO] [stdout]     | |_|
[INFO] [stdout]     | |_in this macro invocation
[INFO] [stdout]     |   in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout]     = note: this warning originates in the macro `tuple_impl` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 45  -             type Output = ( $( $from ,)*  T);
[INFO] [stdout] 45  +             type Output =  $( $from ,)*  T;
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/lib.rs:49:38
[INFO] [stdout]     |
[INFO] [stdout] 49  |               fn append(self, x: T) -> ( $( $from ,)*  T) {
[INFO] [stdout]     |                                        ^                ^
[INFO] [stdout] ...
[INFO] [stdout] 110 |   for_each_prefix! {
[INFO] [stdout]     |  _-
[INFO] [stdout]     | |_|
[INFO] [stdout]     | |
[INFO] [stdout] 111 | |     tuple_impl,
[INFO] [stdout] 112 | |     [(T0), (T1), (T2), (T3), (T4), (T5), (T6), (T7), (T8), (T9), (T10), (T11), (T12), (T13), (T14), (T15),]
[INFO] [stdout] 113 | | }
[INFO] [stdout]     | | -
[INFO] [stdout]     | |_|
[INFO] [stdout]     | |_in this macro invocation
[INFO] [stdout]     |   in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `tuple_impl` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 49  -             fn append(self, x: T) -> ( $( $from ,)*  T) {
[INFO] [stdout] 49  +             fn append(self, x: T) ->  $( $from ,)*  T {
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.78s
[INFO] running `Command { std: "docker" "inspect" "1c2f6070235163d775d21a4928b89a8d974ed4f1985df1e1699614b6c85fbe2e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1c2f6070235163d775d21a4928b89a8d974ed4f1985df1e1699614b6c85fbe2e", kill_on_drop: false }`
[INFO] [stdout] 1c2f6070235163d775d21a4928b89a8d974ed4f1985df1e1699614b6c85fbe2e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-26/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-26/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 078efa3136f6248beaf221fe83f9d74cb82f5b5df96ec04e99437c3b4f9a1e00
[INFO] running `Command { std: "docker" "start" "-a" "078efa3136f6248beaf221fe83f9d74cb82f5b5df96ec04e99437c3b4f9a1e00", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> src/lib.rs:45:27
[INFO] [stderr]     |
[INFO] [stderr] 45  |               type Output = ( $( $from ,)*  T);
[INFO] [stderr]     |                             ^                ^
[INFO] [stderr] ...
[INFO] [stderr] 110 |   for_each_prefix! {
[INFO] [stderr]     |  _-
[INFO] [stderr]     | |_|
[INFO] [stderr]     | |
[INFO] [stderr] 111 | |     tuple_impl,
[INFO] [stderr] 112 | |     [(T0), (T1), (T2), (T3), (T4), (T5), (T6), (T7), (T8), (T9), (T10), (T11), (T12), (T13), (T14), (T15),]
[INFO] [stderr] 113 | | }
[INFO] [stderr]     | | -
[INFO] [stderr]     | |_|
[INFO] [stderr]     | |_in this macro invocation
[INFO] [stderr]     |   in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr]     = note: this warning originates in the macro `tuple_impl` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr] 45  -             type Output = ( $( $from ,)*  T);
[INFO] [stderr] 45  +             type Output =  $( $from ,)*  T;
[INFO] [stderr]     | 
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> src/lib.rs:49:38
[INFO] [stderr]     |
[INFO] [stderr] 49  |               fn append(self, x: T) -> ( $( $from ,)*  T) {
[INFO] [stderr]     |                                        ^                ^
[INFO] [stderr] ...
[INFO] [stderr] 110 |   for_each_prefix! {
[INFO] [stderr]     |  _-
[INFO] [stderr]     | |_|
[INFO] [stderr]     | |
[INFO] [stderr] 111 | |     tuple_impl,
[INFO] [stderr] 112 | |     [(T0), (T1), (T2), (T3), (T4), (T5), (T6), (T7), (T8), (T9), (T10), (T11), (T12), (T13), (T14), (T15),]
[INFO] [stderr] 113 | | }
[INFO] [stderr]     | | -
[INFO] [stderr]     | |_|
[INFO] [stderr]     | |_in this macro invocation
[INFO] [stderr]     |   in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in the macro `tuple_impl` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr] 49  -             fn append(self, x: T) -> ( $( $from ,)*  T) {
[INFO] [stderr] 49  +             fn append(self, x: T) ->  $( $from ,)*  T {
[INFO] [stderr]     | 
[INFO] [stderr] 
[INFO] [stderr] warning: `tuple_utils` (lib) generated 2 warnings
[INFO] [stderr] warning: `tuple_utils` (lib test) generated 2 warnings (2 duplicates)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.62s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/tuple_utils-025eec1938221dbf)
[INFO] [stdout] 
[INFO] [stdout] running 4 tests
[INFO] [stderr]    Doc-tests tuple_utils
[INFO] [stdout] test test::append ... ok
[INFO] [stdout] test test::merge ... ok
[INFO] [stdout] test test::prepend ... ok
[INFO] [stdout] test test::split ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 4 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.04s
[INFO] [stdout] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> /opt/rustwide/workdir/src/lib.rs:45:27
[INFO] [stderr]     |
[INFO] [stderr] 45  |               type Output = ( $( $from ,)*  T);
[INFO] [stderr]     |                             ^                ^
[INFO] [stderr] ...
[INFO] [stderr] 110 |   for_each_prefix! {
[INFO] [stderr]     |  _-
[INFO] [stderr]     | |_|
[INFO] [stderr]     | |
[INFO] [stderr] 111 | |     tuple_impl,
[INFO] [stderr] 112 | |     [(T0), (T1), (T2), (T3), (T4), (T5), (T6), (T7), (T8), (T9), (T10), (T11), (T12), (T13), (T14), (T15),]
[INFO] [stderr] 113 | | }
[INFO] [stderr]     | | -
[INFO] [stderr]     | |_|
[INFO] [stderr]     | |_in this macro invocation
[INFO] [stderr]     |   in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr]     = note: this warning originates in the macro `tuple_impl` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr] 45  -             type Output = ( $( $from ,)*  T);
[INFO] [stderr] 45  +             type Output =  $( $from ,)*  T;
[INFO] [stderr]     | 
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> /opt/rustwide/workdir/src/lib.rs:49:38
[INFO] [stderr]     |
[INFO] [stderr] 49  |               fn append(self, x: T) -> ( $( $from ,)*  T) {
[INFO] [stderr]     |                                        ^                ^
[INFO] [stderr] ...
[INFO] [stderr] 110 |   for_each_prefix! {
[INFO] [stderr]     |  _-
[INFO] [stderr]     | |_|
[INFO] [stderr]     | |
[INFO] [stderr] 111 | |     tuple_impl,
[INFO] [stderr] 112 | |     [(T0), (T1), (T2), (T3), (T4), (T5), (T6), (T7), (T8), (T9), (T10), (T11), (T12), (T13), (T14), (T15),]
[INFO] [stderr] 113 | | }
[INFO] [stderr]     | | -
[INFO] [stderr]     | |_|
[INFO] [stderr]     | |_in this macro invocation
[INFO] [stderr]     |   in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in the macro `tuple_impl` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr] 49  -             fn append(self, x: T) -> ( $( $from ,)*  T) {
[INFO] [stderr] 49  +             fn append(self, x: T) ->  $( $from ,)*  T {
[INFO] [stderr]     | 
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings 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" "078efa3136f6248beaf221fe83f9d74cb82f5b5df96ec04e99437c3b4f9a1e00", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "078efa3136f6248beaf221fe83f9d74cb82f5b5df96ec04e99437c3b4f9a1e00", kill_on_drop: false }`
[INFO] [stdout] 078efa3136f6248beaf221fe83f9d74cb82f5b5df96ec04e99437c3b4f9a1e00