[INFO] fetching crate helper_fn 0.1.0...
[INFO] testing helper_fn-0.1.0 against try#ed7f3d77595b4831fdf085f2529aa13b5b51ff7d for pr-134530
[INFO] extracting crate helper_fn 0.1.0 into /workspace/builds/worker-3-tc2/source
[INFO] validating manifest of crates.io crate helper_fn 0.1.0 on toolchain ed7f3d77595b4831fdf085f2529aa13b5b51ff7d
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ed7f3d77595b4831fdf085f2529aa13b5b51ff7d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate helper_fn 0.1.0
[INFO] finished tweaking crates.io crate helper_fn 0.1.0
[INFO] tweaked toml for crates.io crate helper_fn 0.1.0 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ed7f3d77595b4831fdf085f2529aa13b5b51ff7d" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 7 packages to latest compatible versions
[INFO] [stderr]       Adding syn v1.0.109 (available: v2.0.90)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ed7f3d77595b4831fdf085f2529aa13b5b51ff7d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+ed7f3d77595b4831fdf085f2529aa13b5b51ff7d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b0802eea00a4c3ed7b7f626e2fc19e327e14078897719a323526a795b85ca826
[INFO] running `Command { std: "docker" "start" "-a" "b0802eea00a4c3ed7b7f626e2fc19e327e14078897719a323526a795b85ca826", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b0802eea00a4c3ed7b7f626e2fc19e327e14078897719a323526a795b85ca826", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b0802eea00a4c3ed7b7f626e2fc19e327e14078897719a323526a795b85ca826", kill_on_drop: false }`
[INFO] [stdout] b0802eea00a4c3ed7b7f626e2fc19e327e14078897719a323526a795b85ca826
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+ed7f3d77595b4831fdf085f2529aa13b5b51ff7d" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 48a40478fd4dfd298dac5ea5d69b9cca686b6ffbf8529a5d7734f187dadacdd0
[INFO] running `Command { std: "docker" "start" "-a" "48a40478fd4dfd298dac5ea5d69b9cca686b6ffbf8529a5d7734f187dadacdd0", kill_on_drop: false }`
[INFO] [stderr]    Compiling version_check v0.9.5
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling helper_fn v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `colon` is never read
[INFO] [stdout]    --> src/lib.rs:161:3
[INFO] [stdout]     |
[INFO] [stdout] 159 | struct CaptureArgWithType {
[INFO] [stdout]     |        ------------------ field in this struct
[INFO] [stdout] 160 |   capture: CaptureArg,
[INFO] [stdout] 161 |   colon: Token![:],
[INFO] [stdout]     |   ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `CaptureArgWithType` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> src/lib.rs:178:7
[INFO] [stdout]     |
[INFO] [stdout] 178 |   Ref(Token![&]),
[INFO] [stdout]     |   --- ^^^^^^^^^
[INFO] [stdout]     |   |
[INFO] [stdout]     |   field in this variant
[INFO] [stdout]     |
[INFO] [stdout]     = note: `CaptureArgKind` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]     |
[INFO] [stdout] 178 |   Ref(()),
[INFO] [stdout]     |       ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0` and `1` are never read
[INFO] [stdout]    --> src/lib.rs:179:10
[INFO] [stdout]     |
[INFO] [stdout] 179 |   RefMut(Token![&], Token![mut]),
[INFO] [stdout]     |   ------ ^^^^^^^^^  ^^^^^^^^^^^
[INFO] [stdout]     |   |
[INFO] [stdout]     |   fields in this variant
[INFO] [stdout]     |
[INFO] [stdout]     = note: `CaptureArgKind` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the fields to be of unit type to suppress this warning while preserving the field numbering, or remove the fields
[INFO] [stdout]     |
[INFO] [stdout] 179 |   RefMut((), ()),
[INFO] [stdout]     |          ~~  ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.77s
[INFO] running `Command { std: "docker" "inspect" "48a40478fd4dfd298dac5ea5d69b9cca686b6ffbf8529a5d7734f187dadacdd0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "48a40478fd4dfd298dac5ea5d69b9cca686b6ffbf8529a5d7734f187dadacdd0", kill_on_drop: false }`
[INFO] [stdout] 48a40478fd4dfd298dac5ea5d69b9cca686b6ffbf8529a5d7734f187dadacdd0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+ed7f3d77595b4831fdf085f2529aa13b5b51ff7d" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 00b1d9ff7946891db2cc4ced8c8ac7c616e34a37ca94d3930abecd69231bbb65
[INFO] running `Command { std: "docker" "start" "-a" "00b1d9ff7946891db2cc4ced8c8ac7c616e34a37ca94d3930abecd69231bbb65", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.92
[INFO] [stderr]    Compiling unicode-ident v1.0.14
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling quote v1.0.37
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling helper_fn v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `colon` is never read
[INFO] [stdout]    --> src/lib.rs:161:3
[INFO] [stdout]     |
[INFO] [stdout] 159 | struct CaptureArgWithType {
[INFO] [stdout]     |        ------------------ field in this struct
[INFO] [stdout] 160 |   capture: CaptureArg,
[INFO] [stdout] 161 |   colon: Token![:],
[INFO] [stdout]     |   ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `CaptureArgWithType` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> src/lib.rs:178:7
[INFO] [stdout]     |
[INFO] [stdout] 178 |   Ref(Token![&]),
[INFO] [stdout]     |   --- ^^^^^^^^^
[INFO] [stdout]     |   |
[INFO] [stdout]     |   field in this variant
[INFO] [stdout]     |
[INFO] [stdout]     = note: `CaptureArgKind` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]     |
[INFO] [stdout] 178 |   Ref(()),
[INFO] [stdout]     |       ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0` and `1` are never read
[INFO] [stdout]    --> src/lib.rs:179:10
[INFO] [stdout]     |
[INFO] [stdout] 179 |   RefMut(Token![&], Token![mut]),
[INFO] [stdout]     |   ------ ^^^^^^^^^  ^^^^^^^^^^^
[INFO] [stdout]     |   |
[INFO] [stdout]     |   fields in this variant
[INFO] [stdout]     |
[INFO] [stdout]     = note: `CaptureArgKind` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the fields to be of unit type to suppress this warning while preserving the field numbering, or remove the fields
[INFO] [stdout]     |
[INFO] [stdout] 179 |   RefMut((), ()),
[INFO] [stdout]     |          ~~  ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `colon` is never read
[INFO] [stdout]    --> src/lib.rs:161:3
[INFO] [stdout]     |
[INFO] [stdout] 159 | struct CaptureArgWithType {
[INFO] [stdout]     |        ------------------ field in this struct
[INFO] [stdout] 160 |   capture: CaptureArg,
[INFO] [stdout] 161 |   colon: Token![:],
[INFO] [stdout]     |   ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `CaptureArgWithType` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> src/lib.rs:178:7
[INFO] [stdout]     |
[INFO] [stdout] 178 |   Ref(Token![&]),
[INFO] [stdout]     |   --- ^^^^^^^^^
[INFO] [stdout]     |   |
[INFO] [stdout]     |   field in this variant
[INFO] [stdout]     |
[INFO] [stdout]     = note: `CaptureArgKind` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]     |
[INFO] [stdout] 178 |   Ref(()),
[INFO] [stdout]     |       ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0` and `1` are never read
[INFO] [stdout]    --> src/lib.rs:179:10
[INFO] [stdout]     |
[INFO] [stdout] 179 |   RefMut(Token![&], Token![mut]),
[INFO] [stdout]     |   ------ ^^^^^^^^^  ^^^^^^^^^^^
[INFO] [stdout]     |   |
[INFO] [stdout]     |   fields in this variant
[INFO] [stdout]     |
[INFO] [stdout]     = note: `CaptureArgKind` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the fields to be of unit type to suppress this warning while preserving the field numbering, or remove the fields
[INFO] [stdout]     |
[INFO] [stdout] 179 |   RefMut((), ()),
[INFO] [stdout]     |          ~~  ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused macro definition: `get_num`
[INFO] [stdout]   --> tests/test.rs:21:6
[INFO] [stdout]    |
[INFO] [stdout] 21 |   fn get_num() -> i32 {
[INFO] [stdout]    |      ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_macros)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused macro definition: `increment_num`
[INFO] [stdout]   --> tests/test.rs:34:8
[INFO] [stdout]    |
[INFO] [stdout] 34 |     fn increment_num() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused macro definition: `make_num_zero`
[INFO] [stdout]   --> tests/test.rs:31:6
[INFO] [stdout]    |
[INFO] [stdout] 31 |   fn make_num_zero() {
[INFO] [stdout]    |      ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 6.06s
[INFO] running `Command { std: "docker" "inspect" "00b1d9ff7946891db2cc4ced8c8ac7c616e34a37ca94d3930abecd69231bbb65", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "00b1d9ff7946891db2cc4ced8c8ac7c616e34a37ca94d3930abecd69231bbb65", kill_on_drop: false }`
[INFO] [stdout] 00b1d9ff7946891db2cc4ced8c8ac7c616e34a37ca94d3930abecd69231bbb65
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+ed7f3d77595b4831fdf085f2529aa13b5b51ff7d" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] b30954679a876f192e9166b1e1744eacdc2867ab192cbda2086e7b561f4e041a
[INFO] running `Command { std: "docker" "start" "-a" "b30954679a876f192e9166b1e1744eacdc2867ab192cbda2086e7b561f4e041a", kill_on_drop: false }`
[INFO] [stderr] warning: field `colon` is never read
[INFO] [stderr]    --> src/lib.rs:161:3
[INFO] [stderr]     |
[INFO] [stderr] 159 | struct CaptureArgWithType {
[INFO] [stderr]     |        ------------------ field in this struct
[INFO] [stderr] 160 |   capture: CaptureArg,
[INFO] [stderr] 161 |   colon: Token![:],
[INFO] [stderr]     |   ^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `CaptureArgWithType` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field `0` is never read
[INFO] [stderr]    --> src/lib.rs:178:7
[INFO] [stderr]     |
[INFO] [stderr] 178 |   Ref(Token![&]),
[INFO] [stderr]     |   --- ^^^^^^^^^
[INFO] [stderr]     |   |
[INFO] [stderr]     |   field in this variant
[INFO] [stderr]     |
[INFO] [stderr]     = note: `CaptureArgKind` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stderr] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stderr]     |
[INFO] [stderr] 178 |   Ref(()),
[INFO] [stderr]     |       ~~
[INFO] [stderr] 
[INFO] [stderr] warning: fields `0` and `1` are never read
[INFO] [stderr]    --> src/lib.rs:179:10
[INFO] [stderr]     |
[INFO] [stderr] 179 |   RefMut(Token![&], Token![mut]),
[INFO] [stderr]     |   ------ ^^^^^^^^^  ^^^^^^^^^^^
[INFO] [stderr]     |   |
[INFO] [stderr]     |   fields in this variant
[INFO] [stderr]     |
[INFO] [stderr]     = note: `CaptureArgKind` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stderr] help: consider changing the fields to be of unit type to suppress this warning while preserving the field numbering, or remove the fields
[INFO] [stderr]     |
[INFO] [stderr] 179 |   RefMut((), ()),
[INFO] [stderr]     |          ~~  ~~
[INFO] [stderr] 
[INFO] [stderr] warning: `helper_fn` (lib) generated 3 warnings
[INFO] [stderr] warning: `helper_fn` (lib test) generated 3 warnings (3 duplicates)
[INFO] [stderr] warning: unused macro definition: `get_num`
[INFO] [stderr]   --> tests/test.rs:21:6
[INFO] [stderr]    |
[INFO] [stderr] 21 |   fn get_num() -> i32 {
[INFO] [stderr]    |      ^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_macros)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition: `increment_num`
[INFO] [stderr]   --> tests/test.rs:34:8
[INFO] [stderr]    |
[INFO] [stderr] 34 |     fn increment_num() {
[INFO] [stderr]    |        ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition: `make_num_zero`
[INFO] [stderr]   --> tests/test.rs:31:6
[INFO] [stderr]    |
[INFO] [stderr] 31 |   fn make_num_zero() {
[INFO] [stderr]    |      ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `helper_fn` (test "test") generated 3 warnings
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.06s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/helper_fn-8e31337f4f5d37a4)
[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]      Running tests/test.rs (/opt/rustwide/target/debug/deps/test-32617e2aa856c1e5)
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test foo ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests helper_fn
[INFO] [stderr] error: DefId(0:0 ~ helper_fn[ad32]) has more than five doctests
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 1 previous error
[INFO] [stderr] 
[INFO] [stderr] error: doctest failed, to rerun pass `--doc`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/rustup-home/toolchains/ed7f3d77595b4831fdf085f2529aa13b5b51ff7d/bin/rustdoc --edition=2018 --crate-type proc-macro --color auto --crate-name helper_fn --test src/lib.rs --test-run-directory /opt/rustwide/workdir -L dependency=/opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern helper_fn=/opt/rustwide/target/debug/deps/libhelper_fn-bc3e52c3e550366e.so --extern proc_macro_error=/opt/rustwide/target/debug/deps/libproc_macro_error-18effdfa117030d4.rlib --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-95bf1f8e374ae98e.rlib --extern quote=/opt/rustwide/target/debug/deps/libquote-baa01c734d94388a.rlib --extern syn=/opt/rustwide/target/debug/deps/libsyn-447929744bc0b487.rlib --extern proc_macro -C embed-bitcode=no --check-cfg 'cfg(docsrs)' --check-cfg 'cfg(feature, values())' --cap-lints=forbid --error-format human` (exit status: 1)
[INFO] [stderr] note: test exited abnormally; to see the full output pass --nocapture to the harness.
[INFO] running `Command { std: "docker" "inspect" "b30954679a876f192e9166b1e1744eacdc2867ab192cbda2086e7b561f4e041a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b30954679a876f192e9166b1e1744eacdc2867ab192cbda2086e7b561f4e041a", kill_on_drop: false }`
[INFO] [stdout] b30954679a876f192e9166b1e1744eacdc2867ab192cbda2086e7b561f4e041a