[INFO] cloning repository https://github.com/magnesium-lang/scratch
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/magnesium-lang/scratch" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmagnesium-lang%2Fscratch", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmagnesium-lang%2Fscratch'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 126aac1e82f033f387cc4b0ed74ffc1e23a7797e
[INFO] documenting magnesium-lang/scratch against master#d7d9f15be205b45d44700e7ac33b4f79b91f9680 for pr-117450
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmagnesium-lang%2Fscratch" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/magnesium-lang/scratch on toolchain d7d9f15be205b45d44700e7ac33b4f79b91f9680
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+d7d9f15be205b45d44700e7ac33b4f79b91f9680" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/magnesium-lang/scratch
[INFO] finished tweaking git repo https://github.com/magnesium-lang/scratch
[INFO] tweaked toml for git repo https://github.com/magnesium-lang/scratch written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/magnesium-lang/scratch 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" "+d7d9f15be205b45d44700e7ac33b4f79b91f9680" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded futures-sink-preview v0.3.0-alpha.17
[INFO] [stderr]   Downloaded futures-executor-preview v0.3.0-alpha.17
[INFO] [stderr]   Downloaded futures-core-preview v0.3.0-alpha.17
[INFO] [stderr]   Downloaded futures-channel-preview v0.3.0-alpha.17
[INFO] [stderr]   Downloaded futures-preview v0.3.0-alpha.17
[INFO] [stderr]   Downloaded futures-util-preview v0.3.0-alpha.17
[INFO] [stderr]   Downloaded futures-io-preview v0.3.0-alpha.17
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+d7d9f15be205b45d44700e7ac33b4f79b91f9680" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] eeaff4d44cef1d13a9d7a1197e3e1a5a5e4548b3b7bb81a51af826dfa19b4ea9
[INFO] running `Command { std: "docker" "start" "-a" "eeaff4d44cef1d13a9d7a1197e3e1a5a5e4548b3b7bb81a51af826dfa19b4ea9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "eeaff4d44cef1d13a9d7a1197e3e1a5a5e4548b3b7bb81a51af826dfa19b4ea9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "eeaff4d44cef1d13a9d7a1197e3e1a5a5e4548b3b7bb81a51af826dfa19b4ea9", kill_on_drop: false }`
[INFO] [stdout] eeaff4d44cef1d13a9d7a1197e3e1a5a5e4548b3b7bb81a51af826dfa19b4ea9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+d7d9f15be205b45d44700e7ac33b4f79b91f9680" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9a35243bcdc3bc27193c4e1438d2ade03dd416714875601e82d803e586baf86f
[INFO] running `Command { std: "docker" "start" "-a" "9a35243bcdc3bc27193c4e1438d2ade03dd416714875601e82d803e586baf86f", kill_on_drop: false }`
[INFO] [stderr]     Checking futures-core-preview v0.3.0-alpha.17
[INFO] [stderr]    Compiling memchr v2.2.1
[INFO] [stderr]    Compiling libc v0.2.65
[INFO] [stderr]     Checking futures v0.1.29
[INFO] [stderr]     Checking slab v0.4.2
[INFO] [stderr]     Checking futures-io-preview v0.3.0-alpha.17
[INFO] [stderr]     Checking pin-utils v0.1.0-alpha.4
[INFO] [stderr]  Documenting move-test v0.1.0 (/opt/rustwide/workdir/move-test)
[INFO] [stderr]     Checking futures-sink-preview v0.3.0-alpha.17
[INFO] [stderr]     Checking futures-channel-preview v0.3.0-alpha.17
[INFO] [stderr]     Checking num_cpus v1.11.1
[INFO] [stderr]     Checking futures-util-preview v0.3.0-alpha.17
[INFO] [stderr]     Checking futures-executor-preview v0.3.0-alpha.17
[INFO] [stderr]     Checking futures-preview v0.3.0-alpha.17
[INFO] [stderr]  Documenting compose-test v0.1.0 (/opt/rustwide/workdir/compose-test)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.66s
[INFO] [stderr]    Generated /opt/rustwide/target/doc/compose_test/index.html
[INFO] [stderr]    Generated /opt/rustwide/target/doc/move_test/index.html
[INFO] running `Command { std: "docker" "inspect" "9a35243bcdc3bc27193c4e1438d2ade03dd416714875601e82d803e586baf86f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9a35243bcdc3bc27193c4e1438d2ade03dd416714875601e82d803e586baf86f", kill_on_drop: false }`
[INFO] [stdout] 9a35243bcdc3bc27193c4e1438d2ade03dd416714875601e82d803e586baf86f
[INFO] documenting magnesium-lang/scratch against master#50be22964035027398754e54cd3a497efb00f83e for pr-117450
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmagnesium-lang%2Fscratch" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/magnesium-lang/scratch on toolchain 50be22964035027398754e54cd3a497efb00f83e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+50be22964035027398754e54cd3a497efb00f83e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/magnesium-lang/scratch
[INFO] finished tweaking git repo https://github.com/magnesium-lang/scratch
[INFO] tweaked toml for git repo https://github.com/magnesium-lang/scratch written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/magnesium-lang/scratch 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" "+50be22964035027398754e54cd3a497efb00f83e" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+50be22964035027398754e54cd3a497efb00f83e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 51e113a9bc93fc304bbbc8ac8731917785f844cad1a297cb0bbd7bfce3abb727
[INFO] running `Command { std: "docker" "start" "-a" "51e113a9bc93fc304bbbc8ac8731917785f844cad1a297cb0bbd7bfce3abb727", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "51e113a9bc93fc304bbbc8ac8731917785f844cad1a297cb0bbd7bfce3abb727", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "51e113a9bc93fc304bbbc8ac8731917785f844cad1a297cb0bbd7bfce3abb727", kill_on_drop: false }`
[INFO] [stdout] 51e113a9bc93fc304bbbc8ac8731917785f844cad1a297cb0bbd7bfce3abb727
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+50be22964035027398754e54cd3a497efb00f83e" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9892247fef039c4e2648a9aa627c9221cc894da16adfe1c1916a8fe3d414474e
[INFO] running `Command { std: "docker" "start" "-a" "9892247fef039c4e2648a9aa627c9221cc894da16adfe1c1916a8fe3d414474e", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.2.1
[INFO] [stderr]     Checking futures-core-preview v0.3.0-alpha.17
[INFO] [stderr]    Compiling libc v0.2.65
[INFO] [stderr]     Checking slab v0.4.2
[INFO] [stderr]     Checking pin-utils v0.1.0-alpha.4
[INFO] [stderr]     Checking futures-io-preview v0.3.0-alpha.17
[INFO] [stderr]     Checking futures v0.1.29
[INFO] [stderr]  Documenting move-test v0.1.0 (/opt/rustwide/workdir/move-test)
[INFO] [stderr]     Checking futures-sink-preview v0.3.0-alpha.17
[INFO] [stderr]     Checking futures-channel-preview v0.3.0-alpha.17
[INFO] [stderr]     Checking num_cpus v1.11.1
[INFO] [stderr]     Checking futures-util-preview v0.3.0-alpha.17
[INFO] [stderr]     Checking futures-executor-preview v0.3.0-alpha.17
[INFO] [stderr]     Checking futures-preview v0.3.0-alpha.17
[INFO] [stderr]  Documenting compose-test v0.1.0 (/opt/rustwide/workdir/compose-test)
[INFO] [stdout] error[E0059]: type parameter to bare `std::ops::FnOnce` trait must be a tuple
[INFO] [stdout]   --> compose-test/src/main.rs:43:6
[INFO] [stdout]    |
[INFO] [stdout] 43 | impl std::ops::FnOnce<String> for IO {
[INFO] [stdout]    |      ^^^^^^^^^^^^^^^^^^^^^^^^ the trait `std::marker::Tuple` is not implemented for `std::string::String`
[INFO] [stdout]    |
[INFO] [stdout] note: required by a bound in `std::ops::FnOnce`
[INFO] [stdout]   --> /rustc/50be22964035027398754e54cd3a497efb00f83e/library/core/src/ops/function.rs:242:1
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0059]: type parameter to bare `std::ops::FnMut` trait must be a tuple
[INFO] [stdout]   --> compose-test/src/main.rs:50:6
[INFO] [stdout]    |
[INFO] [stdout] 50 | impl std::ops::FnMut<String> for IO {
[INFO] [stdout]    |      ^^^^^^^^^^^^^^^^^^^^^^^ the trait `std::marker::Tuple` is not implemented for `std::string::String`
[INFO] [stdout]    |
[INFO] [stdout] note: required by a bound in `std::ops::FnMut`
[INFO] [stdout]   --> /rustc/50be22964035027398754e54cd3a497efb00f83e/library/core/src/ops/function.rs:163:1
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: functions with the "rust-call" ABI must take a single non-self tuple argument
[INFO] [stdout]   --> compose-test/src/main.rs:45:5
[INFO] [stdout]    |
[INFO] [stdout] 45 |     extern "rust-call" fn call_once(self, args: String) -> Self::Output {
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `std::marker::Tuple` is not implemented for `std::string::String`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: functions with the "rust-call" ABI must take a single non-self tuple argument
[INFO] [stdout]   --> compose-test/src/main.rs:51:5
[INFO] [stdout]    |
[INFO] [stdout] 51 |     extern "rust-call" fn call_mut(&mut self, args: String) -> Self::Output {
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `std::marker::Tuple` is not implemented for `std::string::String`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 4 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0059, E0277.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0059`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `compose-test`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/rustup-home/toolchains/50be22964035027398754e54cd3a497efb00f83e/bin/rustdoc --edition=2018 --crate-type bin --crate-name compose_test compose-test/src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items '-Arustdoc::private-intra-doc-links' -C metadata=e751048bc890da80 -L dependency=/opt/rustwide/target/debug/deps --extern futures=/opt/rustwide/target/debug/deps/libfutures-2e3226b57ace9374.rmeta --cap-lints=forbid --crate-version 0.1.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "9892247fef039c4e2648a9aa627c9221cc894da16adfe1c1916a8fe3d414474e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9892247fef039c4e2648a9aa627c9221cc894da16adfe1c1916a8fe3d414474e", kill_on_drop: false }`
[INFO] [stdout] 9892247fef039c4e2648a9aa627c9221cc894da16adfe1c1916a8fe3d414474e