[INFO] cloning repository https://github.com/corvuslabs/grammar-fuzzer [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/corvuslabs/grammar-fuzzer" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcorvuslabs%2Fgrammar-fuzzer", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcorvuslabs%2Fgrammar-fuzzer'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 2e0dd7d51a95ef0e477fdfadcd7c80e5f67e3733 [INFO] testing corvuslabs/grammar-fuzzer against 1.52.1 for beta-1.52-2 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcorvuslabs%2Fgrammar-fuzzer" "/workspace/builds/worker-2/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/corvuslabs/grammar-fuzzer on toolchain 1.52.1 [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.52.1" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/corvuslabs/grammar-fuzzer [INFO] finished tweaking git repo https://github.com/corvuslabs/grammar-fuzzer [INFO] tweaked toml for git repo https://github.com/corvuslabs/grammar-fuzzer written to /workspace/builds/worker-2/source/Cargo.toml [INFO] crate git repo https://github.com/corvuslabs/grammar-fuzzer already has a lockfile, it will not be regenerated [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.52.1" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+1.52.1" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] a4b72cd30941f45eb2f4ab6eb74df4af4b1b2452f2120c244a38526ea319213f [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] running `Command { std: "docker" "start" "-a" "a4b72cd30941f45eb2f4ab6eb74df4af4b1b2452f2120c244a38526ea319213f", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "a4b72cd30941f45eb2f4ab6eb74df4af4b1b2452f2120c244a38526ea319213f", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "a4b72cd30941f45eb2f4ab6eb74df4af4b1b2452f2120c244a38526ea319213f", kill_on_drop: false }` [INFO] [stdout] a4b72cd30941f45eb2f4ab6eb74df4af4b1b2452f2120c244a38526ea319213f [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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=warn" "-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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+1.52.1" "build" "--frozen" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 480d3085ca5bb002b8cdfa83a562aa87e01ee5fcbe22dcad291227f5f17430f2 [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] running `Command { std: "docker" "start" "-a" "480d3085ca5bb002b8cdfa83a562aa87e01ee5fcbe22dcad291227f5f17430f2", kill_on_drop: false }` [INFO] [stderr] Compiling libc v0.2.71 [INFO] [stderr] Compiling lexical-core v0.6.7 [INFO] [stderr] Compiling getrandom v0.1.14 [INFO] [stderr] Compiling rand_core v0.5.1 [INFO] [stderr] Compiling rand_chacha v0.2.2 [INFO] [stderr] Compiling nom v5.1.1 [INFO] [stderr] Compiling rand v0.7.3 [INFO] [stderr] Compiling grammar-fuzzer v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used [INFO] [stdout] --> src/fuzzer.rs:65:17 [INFO] [stdout] | [INFO] [stdout] 65 | std::mem::replace(node, new_subtree); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_must_use)]` on by default [INFO] [stdout] = note: if you don't need the old value, you can just assign the new value directly [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 16.39s [INFO] running `Command { std: "docker" "inspect" "480d3085ca5bb002b8cdfa83a562aa87e01ee5fcbe22dcad291227f5f17430f2", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "480d3085ca5bb002b8cdfa83a562aa87e01ee5fcbe22dcad291227f5f17430f2", kill_on_drop: false }` [INFO] [stdout] 480d3085ca5bb002b8cdfa83a562aa87e01ee5fcbe22dcad291227f5f17430f2 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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=warn" "-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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+1.52.1" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 831af4343ea6f411d3bfb907b0bc48419527511454ff703c642f3188dbdc6971 [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] running `Command { std: "docker" "start" "-a" "831af4343ea6f411d3bfb907b0bc48419527511454ff703c642f3188dbdc6971", kill_on_drop: false }` [INFO] [stderr] Compiling grammar-fuzzer v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used [INFO] [stdout] --> src/fuzzer.rs:65:17 [INFO] [stdout] | [INFO] [stdout] 65 | std::mem::replace(node, new_subtree); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_must_use)]` on by default [INFO] [stdout] = note: if you don't need the old value, you can just assign the new value directly [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used [INFO] [stdout] --> src/fuzzer.rs:65:17 [INFO] [stdout] | [INFO] [stdout] 65 | std::mem::replace(node, new_subtree); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_must_use)]` on by default [INFO] [stdout] = note: if you don't need the old value, you can just assign the new value directly [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished test [unoptimized + debuginfo] target(s) in 3.79s [INFO] running `Command { std: "docker" "inspect" "831af4343ea6f411d3bfb907b0bc48419527511454ff703c642f3188dbdc6971", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "831af4343ea6f411d3bfb907b0bc48419527511454ff703c642f3188dbdc6971", kill_on_drop: false }` [INFO] [stdout] 831af4343ea6f411d3bfb907b0bc48419527511454ff703c642f3188dbdc6971 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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=warn" "-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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+1.52.1" "test" "--frozen", kill_on_drop: false }` [INFO] [stdout] f60f3b88bd247df78196866a904f0c58e3c29542b9208a96654f28e1322dbe09 [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] running `Command { std: "docker" "start" "-a" "f60f3b88bd247df78196866a904f0c58e3c29542b9208a96654f28e1322dbe09", kill_on_drop: false }` [INFO] [stderr] warning: unused return value of `std::mem::replace` that must be used [INFO] [stderr] --> src/fuzzer.rs:65:17 [INFO] [stderr] | [INFO] [stderr] 65 | std::mem::replace(node, new_subtree); [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_must_use)]` on by default [INFO] [stderr] = note: if you don't need the old value, you can just assign the new value directly [INFO] [stderr] [INFO] [stderr] warning: 1 warning emitted [INFO] [stderr] [INFO] [stderr] warning: unused return value of `std::mem::replace` that must be used [INFO] [stderr] --> src/fuzzer.rs:65:17 [INFO] [stderr] | [INFO] [stderr] 65 | std::mem::replace(node, new_subtree); [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_must_use)]` on by default [INFO] [stderr] = note: if you don't need the old value, you can just assign the new value directly [INFO] [stderr] [INFO] [stderr] warning: 1 warning emitted [INFO] [stderr] [INFO] [stderr] Finished test [unoptimized + debuginfo] target(s) in 0.03s [INFO] [stdout] [INFO] [stderr] Running unittests (/opt/rustwide/target/debug/deps/grammar_fuzzer-891eb3c322ddc82c) [INFO] [stdout] running 24 tests [INFO] [stdout] test derivation_tree::tests::test_from_str_for_children ... ok [INFO] [stdout] test parser::tests::test_next_extended_nonterminal ... ok [INFO] [stdout] test derivation_tree::tests::test_display_for_node ... ok [INFO] [stdout] test extensions::tests::test_ebnf_to_bnf ... ok [INFO] [stdout] test grammar::tests::is_valid_grammar ... ok [INFO] [stdout] test grammar::tests::test_symbol_cost ... ok [INFO] [stdout] test grammar::tests::expansion_cost ... ok [INFO] [stdout] test parser::tests::test_next_parenthesized_expression ... ok [INFO] [stdout] test parser::tests::test_tokens ... ok [INFO] [stdout] test grammar::tests::test_find_unavoidable_cycle ... ok [INFO] [stdout] test grammar::tests::test_grammar_from_string_map ... ok [INFO] [stdout] test derivation_tree::tests::test_num_possible_expansions ... ok [INFO] [stdout] test shared::tests::test_max_idx ... ok [INFO] [stdout] test shared::tests::test_min_idx ... ok [INFO] [stdout] test grammar::tests::test_find_reachable_nonterminals ... ok [INFO] [stdout] test shared::tests::test_random_element ... ok [INFO] [stdout] test shared::tests::test_add_to_set ... ok [INFO] [stdout] test strategy::strategy_cont_tests::test_close_strategy_cont ... ok [INFO] [stdout] test derivation_tree::tests::test_any_possible_expansions ... ok [INFO] [stdout] test strategy::strategy_cont_tests::test_growth_strategy_cont ... ok [INFO] [stderr] Doc-tests grammar-fuzzer [INFO] [stdout] test strategy::strategy_choose_tests::test_growth_strategy_choose ... ok [INFO] [stdout] test strategy::strategy_choose_tests::test_close_strategy_choose ... ok [INFO] [stdout] test strategy::strategy_cont_tests::test_random_strategy_cont ... ok [INFO] [stdout] test strategy::strategy_choose_tests::test_random_strategy_choose ... ok [INFO] [stdout] [INFO] [stdout] test result: ok. 24 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.02s [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] running 5 tests [INFO] [stdout] test src/grammar.rs - grammar (line 5) ... ok [INFO] [stdout] test src/strategy.rs - strategy (line 6) ... ok [INFO] [stdout] test src/extensions.rs - extensions (line 5) ... ok [INFO] [stdout] test src/fuzzer.rs - fuzzer (line 5) ... ok [INFO] [stdout] test src/lib.rs - (line 6) ... ok [INFO] [stdout] [INFO] [stdout] test result: ok. 5 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 16.65s [INFO] [stdout] [INFO] running `Command { std: "docker" "inspect" "f60f3b88bd247df78196866a904f0c58e3c29542b9208a96654f28e1322dbe09", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "f60f3b88bd247df78196866a904f0c58e3c29542b9208a96654f28e1322dbe09", kill_on_drop: false }` [INFO] [stdout] f60f3b88bd247df78196866a904f0c58e3c29542b9208a96654f28e1322dbe09