[INFO] fetching crate ebnf 0.1.4...
[INFO] testing ebnf-0.1.4 against try#b83b707f97d809763b7861afa7638871f3339a33 for pr-145838-1
[INFO] extracting crate ebnf 0.1.4 into /workspace/builds/worker-3-tc2/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-3-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate ebnf 0.1.4 on toolchain b83b707f97d809763b7861afa7638871f3339a33
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b83b707f97d809763b7861afa7638871f3339a33" "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" "+b83b707f97d809763b7861afa7638871f3339a33" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 31 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" "+b83b707f97d809763b7861afa7638871f3339a33" "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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+b83b707f97d809763b7861afa7638871f3339a33" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a2c62129ee79a01d35cf9e2d7b01e2ed38f3b1d75393b4aaab8a0a55852b906e
[INFO] running `Command { std: "docker" "start" "-a" "a2c62129ee79a01d35cf9e2d7b01e2ed38f3b1d75393b4aaab8a0a55852b906e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a2c62129ee79a01d35cf9e2d7b01e2ed38f3b1d75393b4aaab8a0a55852b906e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a2c62129ee79a01d35cf9e2d7b01e2ed38f3b1d75393b4aaab8a0a55852b906e", kill_on_drop: false }`
[INFO] [stdout] a2c62129ee79a01d35cf9e2d7b01e2ed38f3b1d75393b4aaab8a0a55852b906e
[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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+b83b707f97d809763b7861afa7638871f3339a33" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0bd449bbc3fe27403ec04395e279c9f3c3b642ef704851bcf500c41d2842d6f1
[INFO] running `Command { std: "docker" "start" "-a" "0bd449bbc3fe27403ec04395e279c9f3c3b642ef704851bcf500c41d2842d6f1", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.7.5
[INFO] [stderr]    Compiling utf8-width v0.1.7
[INFO] [stderr]    Compiling minimal-lexical v0.2.1
[INFO] [stderr]    Compiling serde_derive v1.0.219
[INFO] [stderr]    Compiling percent-encoding v2.3.2
[INFO] [stderr]    Compiling html-escape v0.2.13
[INFO] [stderr]    Compiling nom v7.1.3
[INFO] [stderr]    Compiling parse-hyperlinks v0.23.4
[INFO] [stderr]    Compiling serde v1.0.219
[INFO] [stderr]    Compiling ebnf v0.1.4 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 8.92s
[INFO] running `Command { std: "docker" "inspect" "0bd449bbc3fe27403ec04395e279c9f3c3b642ef704851bcf500c41d2842d6f1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0bd449bbc3fe27403ec04395e279c9f3c3b642ef704851bcf500c41d2842d6f1", kill_on_drop: false }`
[INFO] [stdout] 0bd449bbc3fe27403ec04395e279c9f3c3b642ef704851bcf500c41d2842d6f1
[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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+b83b707f97d809763b7861afa7638871f3339a33" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9b29bc8f55eab4651b286cf058aa02c4a86f92405ae42be28e81a261a14b77de
[INFO] running `Command { std: "docker" "start" "-a" "9b29bc8f55eab4651b286cf058aa02c4a86f92405ae42be28e81a261a14b77de", kill_on_drop: false }`
[INFO] [stderr]    Compiling similar v2.7.0
[INFO] [stderr]    Compiling console v0.15.11
[INFO] [stderr]    Compiling insta v1.43.1
[INFO] [stderr]    Compiling ebnf v0.1.4 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 4.26s
[INFO] running `Command { std: "docker" "inspect" "9b29bc8f55eab4651b286cf058aa02c4a86f92405ae42be28e81a261a14b77de", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9b29bc8f55eab4651b286cf058aa02c4a86f92405ae42be28e81a261a14b77de", kill_on_drop: false }`
[INFO] [stdout] 9b29bc8f55eab4651b286cf058aa02c4a86f92405ae42be28e81a261a14b77de
[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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+b83b707f97d809763b7861afa7638871f3339a33" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] afdc943f3895babd362a9142f69aaf3844616b28ee7123525c86bb6ba402a542
[INFO] running `Command { std: "docker" "start" "-a" "afdc943f3895babd362a9142f69aaf3844616b28ee7123525c86bb6ba402a542", kill_on_drop: false }`
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/ebnf-8ab47ac2d1c385e5)
[INFO] [stdout] 
[INFO] [stdout] running 12 tests
[INFO] [stdout] test parser::test::test_parse ... ok
[INFO] [stdout] test parser::test::alternation_precidence ... ok
[INFO] [stdout] test parser::test::concat_precidence ... ok
[INFO] [stdout] test parser::test::alternation_precidence_group ... ok
[INFO] [stdout] test parser::test::alternation_precidence_nested ... ok
[INFO] [stdout] test parser::test::alternation_precidence_multiple ... ok
[INFO] [stdout] test parser::test::escaped_string ... ok
[INFO] [stdout] test parser::test::underscore ... ok
[INFO] [stdout] test parser::test::multiple_underscores ... ok
[INFO] [stdout] test parser::test::concat_precidence_reverse ... ok
[INFO] [stdout] test parser::test::simple_alternation ... ok
[INFO] [stdout] test parser::test::space_before_semi ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 12 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.03s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests ebnf
[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 0.11s
[INFO] [stdout] 
[INFO] [stderr] error: doctest failed, to rerun pass `--doc`
[INFO] running `Command { std: "docker" "inspect" "afdc943f3895babd362a9142f69aaf3844616b28ee7123525c86bb6ba402a542", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "afdc943f3895babd362a9142f69aaf3844616b28ee7123525c86bb6ba402a542", kill_on_drop: false }`
[INFO] [stdout] afdc943f3895babd362a9142f69aaf3844616b28ee7123525c86bb6ba402a542