[INFO] cloning repository https://github.com/anderejd/extern_attrib
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/anderejd/extern_attrib" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fanderejd%2Fextern_attrib", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fanderejd%2Fextern_attrib'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a70c0caf5ddb993cde6e65d89b125f168e1d5dcc
[INFO] testing anderejd/extern_attrib against master#0e21a27075a8c508f00d1a4430497f17ce93d5c9 for pr-98839
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fanderejd%2Fextern_attrib" "/workspace/builds/worker-1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/anderejd/extern_attrib on toolchain 0e21a27075a8c508f00d1a4430497f17ce93d5c9
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0e21a27075a8c508f00d1a4430497f17ce93d5c9" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/anderejd/extern_attrib
[INFO] finished tweaking git repo https://github.com/anderejd/extern_attrib
[INFO] tweaked toml for git repo https://github.com/anderejd/extern_attrib written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/anderejd/extern_attrib already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0e21a27075a8c508f00d1a4430497f17ce93d5c9" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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@sha256:5873ed620acfc3295992aedd9294443d62a478a48ba243bc5e6c4f5abaffa05f" "/opt/rustwide/cargo-home/bin/cargo" "+0e21a27075a8c508f00d1a4430497f17ce93d5c9" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 343c619e70bdad813f2123b4b92aea3ae443dd555085aa46ea4a90856e059d1e
[INFO] running `Command { std: "docker" "start" "-a" "343c619e70bdad813f2123b4b92aea3ae443dd555085aa46ea4a90856e059d1e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "343c619e70bdad813f2123b4b92aea3ae443dd555085aa46ea4a90856e059d1e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "343c619e70bdad813f2123b4b92aea3ae443dd555085aa46ea4a90856e059d1e", kill_on_drop: false }`
[INFO] [stdout] 343c619e70bdad813f2123b4b92aea3ae443dd555085aa46ea4a90856e059d1e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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@sha256:5873ed620acfc3295992aedd9294443d62a478a48ba243bc5e6c4f5abaffa05f" "/opt/rustwide/cargo-home/bin/cargo" "+0e21a27075a8c508f00d1a4430497f17ce93d5c9" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 05e78525f44edbfe474a9db1aef8d9e01cb03f9f57de4f7c7cc37ba3adea65a5
[INFO] running `Command { std: "docker" "start" "-a" "05e78525f44edbfe474a9db1aef8d9e01cb03f9f57de4f7c7cc37ba3adea65a5", kill_on_drop: false }`
[INFO] [stderr]    Compiling unicode-xid v0.0.4
[INFO] [stderr]    Compiling quote v0.3.15
[INFO] [stderr]    Compiling synom v0.11.3
[INFO] [stderr]    Compiling syn v0.11.11
[INFO] [stderr]    Compiling extern_attrib v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]   --> src/lib.rs:35:7
[INFO] [stdout]    |
[INFO] [stdout] 35 |       { //! This scope drops abi_opt after mutation.
[INFO] [stdout]    |  _____- ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 36 | |         let abi_opt = match item.node {
[INFO] [stdout] 37 | |             ItemKind::Fn(_, _, _, ref mut opt, _, _) => opt,
[INFO] [stdout] 38 | |             _ => return input
[INFO] [stdout] 39 | |         };
[INFO] [stdout] 40 | |         modify_abi(abi_opt);
[INFO] [stdout] 41 | |     }
[INFO] [stdout]    | |_____- rustdoc does not generate documentation for expressions
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stdout]    = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `proc_macro` has been stable since 1.29.0 and no longer requires an attribute to enable
[INFO] [stdout]   --> src/lib.rs:13:12
[INFO] [stdout]    |
[INFO] [stdout] 13 | #![feature(proc_macro)]
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.47s
[INFO] running `Command { std: "docker" "inspect" "05e78525f44edbfe474a9db1aef8d9e01cb03f9f57de4f7c7cc37ba3adea65a5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "05e78525f44edbfe474a9db1aef8d9e01cb03f9f57de4f7c7cc37ba3adea65a5", kill_on_drop: false }`
[INFO] [stdout] 05e78525f44edbfe474a9db1aef8d9e01cb03f9f57de4f7c7cc37ba3adea65a5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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@sha256:5873ed620acfc3295992aedd9294443d62a478a48ba243bc5e6c4f5abaffa05f" "/opt/rustwide/cargo-home/bin/cargo" "+0e21a27075a8c508f00d1a4430497f17ce93d5c9" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d47ad99bc01f78c6d08eb82c0426de2feb0ca81e73ab4e022aec96fd5e03673c
[INFO] running `Command { std: "docker" "start" "-a" "d47ad99bc01f78c6d08eb82c0426de2feb0ca81e73ab4e022aec96fd5e03673c", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]   --> src/lib.rs:35:7
[INFO] [stdout]    |
[INFO] [stdout] 35 |       { //! This scope drops abi_opt after mutation.
[INFO] [stdout]    |  _____- ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 36 | |         let abi_opt = match item.node {
[INFO] [stdout] 37 | |             ItemKind::Fn(_, _, _, ref mut opt, _, _) => opt,
[INFO] [stdout] 38 | |             _ => return input
[INFO] [stdout] 39 | |         };
[INFO] [stdout] 40 | |         modify_abi(abi_opt);
[INFO] [stdout] 41 | |     }
[INFO] [stdout]    | |_____- rustdoc does not generate documentation for expressions
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stdout]    = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling extern_attrib v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the feature `proc_macro` has been stable since 1.29.0 and no longer requires an attribute to enable
[INFO] [stdout]   --> src/lib.rs:13:12
[INFO] [stdout]    |
[INFO] [stdout] 13 | #![feature(proc_macro)]
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]   --> tests/tests.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 24 |         /// This should cause build failure if extern_auto is incorrect.
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 25 |         #[cfg(not(target_os = "windows"))]
[INFO] [stdout] 26 |         let f: extern "C" fn(i: i32) -> i32 = modified_by_attrib;
[INFO] [stdout]    |         --------------------------------------------------------- rustdoc does not generate documentation for statements
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stdout]    = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]   --> src/lib.rs:35:7
[INFO] [stdout]    |
[INFO] [stdout] 35 |       { //! This scope drops abi_opt after mutation.
[INFO] [stdout]    |  _____- ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 36 | |         let abi_opt = match item.node {
[INFO] [stdout] 37 | |             ItemKind::Fn(_, _, _, ref mut opt, _, _) => opt,
[INFO] [stdout] 38 | |             _ => return input
[INFO] [stdout] 39 | |         };
[INFO] [stdout] 40 | |         modify_abi(abi_opt);
[INFO] [stdout] 41 | |     }
[INFO] [stdout]    | |_____- rustdoc does not generate documentation for expressions
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stdout]    = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `proc_macro` has been stable since 1.29.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> tests/tests.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(proc_macro)]
[INFO] [stdout]   |            ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `proc_macro` has been stable since 1.29.0 and no longer requires an attribute to enable
[INFO] [stdout]   --> src/lib.rs:13:12
[INFO] [stdout]    |
[INFO] [stdout] 13 | #![feature(proc_macro)]
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.76s
[INFO] running `Command { std: "docker" "inspect" "d47ad99bc01f78c6d08eb82c0426de2feb0ca81e73ab4e022aec96fd5e03673c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d47ad99bc01f78c6d08eb82c0426de2feb0ca81e73ab4e022aec96fd5e03673c", kill_on_drop: false }`
[INFO] [stdout] d47ad99bc01f78c6d08eb82c0426de2feb0ca81e73ab4e022aec96fd5e03673c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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@sha256:5873ed620acfc3295992aedd9294443d62a478a48ba243bc5e6c4f5abaffa05f" "/opt/rustwide/cargo-home/bin/cargo" "+0e21a27075a8c508f00d1a4430497f17ce93d5c9" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 628d015f7cced6e87d29d7d70d72efb38c2b2448a9e93b30bf2a368632fd3b99
[INFO] running `Command { std: "docker" "start" "-a" "628d015f7cced6e87d29d7d70d72efb38c2b2448a9e93b30bf2a368632fd3b99", kill_on_drop: false }`
[INFO] [stderr] warning: unused doc comment
[INFO] [stderr]   --> src/lib.rs:35:7
[INFO] [stderr]    |
[INFO] [stderr] 35 |       { //! This scope drops abi_opt after mutation.
[INFO] [stderr]    |  _____- ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 36 | |         let abi_opt = match item.node {
[INFO] [stderr] 37 | |             ItemKind::Fn(_, _, _, ref mut opt, _, _) => opt,
[INFO] [stderr] 38 | |             _ => return input
[INFO] [stderr] 39 | |         };
[INFO] [stderr] 40 | |         modify_abi(abi_opt);
[INFO] [stderr] 41 | |     }
[INFO] [stderr]    | |_____- rustdoc does not generate documentation for expressions
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stderr]    = help: use `//` for a plain comment
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `proc_macro` has been stable since 1.29.0 and no longer requires an attribute to enable
[INFO] [stderr]   --> src/lib.rs:13:12
[INFO] [stderr]    |
[INFO] [stderr] 13 | #![feature(proc_macro)]
[INFO] [stderr]    |            ^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(stable_features)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `extern_attrib` (lib) generated 2 warnings
[INFO] [stderr] warning: unused doc comment
[INFO] [stderr]   --> tests/tests.rs:24:9
[INFO] [stderr]    |
[INFO] [stderr] 24 |         /// This should cause build failure if extern_auto is incorrect.
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 25 |         #[cfg(not(target_os = "windows"))]
[INFO] [stderr] 26 |         let f: extern "C" fn(i: i32) -> i32 = modified_by_attrib;
[INFO] [stderr]    |         --------------------------------------------------------- rustdoc does not generate documentation for statements
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stderr]    = help: use `//` for a plain comment
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `proc_macro` has been stable since 1.29.0 and no longer requires an attribute to enable
[INFO] [stderr]  --> tests/tests.rs:1:12
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(proc_macro)]
[INFO] [stderr]   |            ^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(stable_features)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `extern_attrib` (lib test) generated 2 warnings (2 duplicates)
[INFO] [stderr] warning: `extern_attrib` (test "tests") generated 2 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/extern_attrib-87b474e4e4d8d677)
[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/tests.rs (/opt/rustwide/target/debug/deps/tests-80986394572c88da)
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test tests::extern_auto_sets_the_target_os_ffi_abi ... 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 extern_attrib
[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" "628d015f7cced6e87d29d7d70d72efb38c2b2448a9e93b30bf2a368632fd3b99", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "628d015f7cced6e87d29d7d70d72efb38c2b2448a9e93b30bf2a368632fd3b99", kill_on_drop: false }`
[INFO] [stdout] 628d015f7cced6e87d29d7d70d72efb38c2b2448a9e93b30bf2a368632fd3b99