[INFO] fetching crate ebnf 0.1.4...
[INFO] testing ebnf-0.1.4 against master#d98a5da813da67eb189387b8ccfb73cf481275d8+rustflags=-Copt-level=3 for pr-138759
[INFO] extracting crate ebnf 0.1.4 into /workspace/builds/worker-0-tc1/source
[INFO] started tweaking crates.io crate ebnf 0.1.4
[INFO] finished tweaking crates.io crate ebnf 0.1.4
[INFO] tweaked toml for crates.io crate ebnf 0.1.4 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate ebnf 0.1.4 on toolchain d98a5da813da67eb189387b8ccfb73cf481275d8
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+d98a5da813da67eb189387b8ccfb73cf481275d8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+d98a5da813da67eb189387b8ccfb73cf481275d8" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 32 packages to latest compatible versions
[INFO] [stderr]       Adding nom v7.1.3 (available: v8.0.0)
[INFO] [stderr]       Adding parse-hyperlinks v0.23.4 (available: v0.29.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+d98a5da813da67eb189387b8ccfb73cf481275d8" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded utf8-width v0.1.7
[INFO] [stderr]   Downloaded html-escape v0.2.13
[INFO] [stderr]   Downloaded parse-hyperlinks v0.23.4
[INFO] [stderr]   Downloaded insta v1.43.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+d98a5da813da67eb189387b8ccfb73cf481275d8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 37174825aa1bed6bb758d4ebc0fcf8a599383d686e8230bee2e4c537db40a17c
[INFO] running `Command { std: "docker" "start" "-a" "37174825aa1bed6bb758d4ebc0fcf8a599383d686e8230bee2e4c537db40a17c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "37174825aa1bed6bb758d4ebc0fcf8a599383d686e8230bee2e4c537db40a17c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "37174825aa1bed6bb758d4ebc0fcf8a599383d686e8230bee2e4c537db40a17c", kill_on_drop: false }`
[INFO] [stdout] 37174825aa1bed6bb758d4ebc0fcf8a599383d686e8230bee2e4c537db40a17c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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 -Copt-level=3" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+d98a5da813da67eb189387b8ccfb73cf481275d8" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fd8aa77968880e8aaf5829d82e9fdb18836051774a42513be1607e1e58b6c4d3
[INFO] running `Command { std: "docker" "start" "-a" "fd8aa77968880e8aaf5829d82e9fdb18836051774a42513be1607e1e58b6c4d3", kill_on_drop: false }`
[INFO] [stderr]    Compiling utf8-width v0.1.7
[INFO] [stderr]    Compiling nom v7.1.3
[INFO] [stderr]    Compiling serde_derive v1.0.228
[INFO] [stderr]    Compiling html-escape v0.2.13
[INFO] [stderr]    Compiling parse-hyperlinks v0.23.4
[INFO] [stderr]    Compiling serde v1.0.228
[INFO] [stderr]    Compiling ebnf v0.1.4 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 18.15s
[INFO] running `Command { std: "docker" "inspect" "fd8aa77968880e8aaf5829d82e9fdb18836051774a42513be1607e1e58b6c4d3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fd8aa77968880e8aaf5829d82e9fdb18836051774a42513be1607e1e58b6c4d3", kill_on_drop: false }`
[INFO] [stdout] fd8aa77968880e8aaf5829d82e9fdb18836051774a42513be1607e1e58b6c4d3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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 -Copt-level=3" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+d98a5da813da67eb189387b8ccfb73cf481275d8" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f31d3bf0f6f691519ecad52104f7afd545f973d98c976b7648d73173be1214d8
[INFO] running `Command { std: "docker" "start" "-a" "f31d3bf0f6f691519ecad52104f7afd545f973d98c976b7648d73173be1214d8", kill_on_drop: false }`
[INFO] [stderr]    Compiling similar v2.7.0
[INFO] [stderr]    Compiling console v0.15.11
[INFO] [stderr]    Compiling insta v1.43.2
[INFO] [stderr]    Compiling ebnf v0.1.4 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 19.85s
[INFO] running `Command { std: "docker" "inspect" "f31d3bf0f6f691519ecad52104f7afd545f973d98c976b7648d73173be1214d8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f31d3bf0f6f691519ecad52104f7afd545f973d98c976b7648d73173be1214d8", kill_on_drop: false }`
[INFO] [stdout] f31d3bf0f6f691519ecad52104f7afd545f973d98c976b7648d73173be1214d8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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 -Copt-level=3" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+d98a5da813da67eb189387b8ccfb73cf481275d8" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 4467a6c4f8f6fa10d45cd26476c476a8a69c7ab2a47e946e8e5f38f3436ca23e
[INFO] running `Command { std: "docker" "start" "-a" "4467a6c4f8f6fa10d45cd26476c476a8a69c7ab2a47e946e8e5f38f3436ca23e", kill_on_drop: false }`
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.06s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/ebnf-549748edddf6718d)
[INFO] [stdout] 
[INFO] [stdout] running 12 tests
[INFO] [stdout] test parser::test::test_parse ... ok
[INFO] [stdout] test parser::test::alternation_precidence_group ... ok
[INFO] [stdout] test parser::test::escaped_string ... ok
[INFO] [stdout] test parser::test::concat_precidence ... ok
[INFO] [stdout] test parser::test::alternation_precidence_nested ... ok
[INFO] [stdout] test parser::test::alternation_precidence ... ok
[INFO] [stderr]    Doc-tests ebnf
[INFO] [stdout] test parser::test::concat_precidence_reverse ... ok
[INFO] [stdout] test parser::test::underscore ... ok
[INFO] [stdout] test parser::test::alternation_precidence_multiple ... ok
[INFO] [stdout] test parser::test::multiple_underscores ... ok
[INFO] [stdout] test parser::test::space_before_semi ... ok
[INFO] [stdout] test parser::test::simple_alternation ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 12 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.04s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test src/lib.rs - get_grammar (line 54) ... FAILED
[INFO] [stdout] test src/lib.rs - (line 25) ... ok
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- src/lib.rs - get_grammar (line 54) stdout ----
[INFO] [stdout] error[E0277]: the `?` operator can only be used in a function that returns `Result` or `Option` (or another type that implements `FromResidual`)
[INFO] [stdout]   --> src/lib.rs:61:43
[INFO] [stdout]    |
[INFO] [stdout] 4  | fn main() { #[allow(non_snake_case)] fn _doctest_main_src_lib_rs_54_0() {
[INFO] [stdout]    |                                      ---------------------------------- this function should return `Result` or `Option` to accept `?`
[INFO] [stdout] ...
[INFO] [stdout] 10 | let grammar = get_grammar(grammar_literal)?;
[INFO] [stdout]    |                                           ^ cannot use the `?` operator in a function that returns `()`
[INFO] [stdout]    |
[INFO] [stdout] help: consider adding return type
[INFO] [stdout]    |
[INFO] [stdout] 4  ~ fn main() { #[allow(non_snake_case)] fn _doctest_main_src_lib_rs_54_0() -> Result<(), Box<dyn std::error::Error>> {
[INFO] [stdout] 5  | use ebnf::get_grammar;
[INFO] [stdout] ...
[INFO] [stdout] 10 | let grammar = get_grammar(grammar_literal)?;
[INFO] [stdout] 11 +     Ok(())
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0277`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     src/lib.rs - get_grammar (line 54)
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 1 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.31s
[INFO] [stdout] 
[INFO] [stderr] error: doctest failed, to rerun pass `--doc`
[INFO] running `Command { std: "docker" "inspect" "4467a6c4f8f6fa10d45cd26476c476a8a69c7ab2a47e946e8e5f38f3436ca23e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4467a6c4f8f6fa10d45cd26476c476a8a69c7ab2a47e946e8e5f38f3436ca23e", kill_on_drop: false }`
[INFO] [stdout] 4467a6c4f8f6fa10d45cd26476c476a8a69c7ab2a47e946e8e5f38f3436ca23e
