[INFO] fetching crate shroom 0.0.1...
[INFO] testing shroom-0.0.1 against try#8de4c7234dd9b97c9d76b58671343fdbbc9a433e+target=x86_64-unknown-linux-musl for musl_upgrade_1_2_5_with_libc_patch_0
[INFO] extracting crate shroom 0.0.1 into /workspace/builds/worker-3-tc1/source
[INFO] started tweaking crates.io crate shroom 0.0.1
[INFO] finished tweaking crates.io crate shroom 0.0.1
[INFO] tweaked toml for crates.io crate shroom 0.0.1 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate shroom 0.0.1 on toolchain 8de4c7234dd9b97c9d76b58671343fdbbc9a433e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "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" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "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 79 packages to latest compatible versions
[INFO] [stderr]       Adding lalrpop v0.16.3 (available: v0.22.2)
[INFO] [stderr]       Adding lalrpop-util v0.16.3 (available: v0.22.2)
[INFO] [stderr]       Adding regex v0.2.11 (available: v1.11.1)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded fixedbitset v0.1.9
[INFO] [stderr]   Downloaded lalrpop-util v0.16.3
[INFO] [stderr]   Downloaded string_cache v0.7.5
[INFO] [stderr]   Downloaded string_cache_codegen v0.4.4
[INFO] [stderr]   Downloaded ascii-canvas v1.0.0
[INFO] [stderr]   Downloaded ordermap v0.3.5
[INFO] [stderr]   Downloaded docopt v1.1.1
[INFO] [stderr]   Downloaded ena v0.11.0
[INFO] [stderr]   Downloaded lalrpop v0.16.3
[INFO] [stderr]   Downloaded itertools v0.8.2
[INFO] [stderr]   Downloaded petgraph v0.4.13
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e74add6a90ba271c6a0c0969cb16954f84eaaba0c7542a73a5898bc161feda59
[INFO] running `Command { std: "docker" "start" "-a" "e74add6a90ba271c6a0c0969cb16954f84eaaba0c7542a73a5898bc161feda59", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e74add6a90ba271c6a0c0969cb16954f84eaaba0c7542a73a5898bc161feda59", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e74add6a90ba271c6a0c0969cb16954f84eaaba0c7542a73a5898bc161feda59", kill_on_drop: false }`
[INFO] [stdout] e74add6a90ba271c6a0c0969cb16954f84eaaba0c7542a73a5898bc161feda59
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "build" "--frozen" "--message-format=json" "--target" "x86_64-unknown-linux-musl", kill_on_drop: false }`
[INFO] [stdout] da1b32dc657dc69b48433e1dfe4f6060504af7c89302334aa2371be4649d6b3c
[INFO] running `Command { std: "docker" "start" "-a" "da1b32dc657dc69b48433e1dfe4f6060504af7c89302334aa2371be4649d6b3c", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v0.1.8
[INFO] [stderr]    Compiling rand_core v0.4.2
[INFO] [stderr]    Compiling siphasher v0.2.3
[INFO] [stderr]    Compiling string_cache_shared v0.3.0
[INFO] [stderr]    Compiling memchr v2.7.5
[INFO] [stderr]    Compiling regex-syntax v0.8.5
[INFO] [stderr]    Compiling byte-tools v0.3.1
[INFO] [stderr]    Compiling byteorder v1.5.0
[INFO] [stderr]    Compiling lazy_static v1.5.0
[INFO] [stderr]    Compiling strsim v0.10.0
[INFO] [stderr]    Compiling typenum v1.18.0
[INFO] [stderr]    Compiling serde v1.0.219
[INFO] [stderr]    Compiling either v1.15.0
[INFO] [stderr]    Compiling ordermap v0.3.5
[INFO] [stderr]    Compiling opaque-debug v0.2.3
[INFO] [stderr]    Compiling syn v2.0.104
[INFO] [stderr]    Compiling new_debug_unreachable v1.0.6
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling block-padding v0.1.5
[INFO] [stderr]    Compiling term v0.4.6
[INFO] [stderr]    Compiling bit-vec v0.6.3
[INFO] [stderr]    Compiling precomputed-hash v0.1.1
[INFO] [stderr]    Compiling rand_core v0.3.1
[INFO] [stderr]    Compiling rand_hc v0.1.0
[INFO] [stderr]    Compiling rand_isaac v0.1.1
[INFO] [stderr]    Compiling rand_xorshift v0.1.1
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]    Compiling rand_jitter v0.1.4
[INFO] [stderr]    Compiling phf_shared v0.7.24
[INFO] [stderr]    Compiling fake-simd v0.1.2
[INFO] [stderr]    Compiling fixedbitset v0.1.9
[INFO] [stderr]    Compiling bit-set v0.5.3
[INFO] [stderr]    Compiling ascii-canvas v1.0.0
[INFO] [stderr]    Compiling itertools v0.8.2
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling ena v0.11.0
[INFO] [stderr]    Compiling diff v0.1.13
[INFO] [stderr]    Compiling petgraph v0.4.13
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling lalrpop-util v0.16.3
[INFO] [stderr]    Compiling regex-syntax v0.6.29
[INFO] [stderr]    Compiling aho-corasick v1.1.3
[INFO] [stderr]    Compiling ucd-util v0.1.10
[INFO] [stderr]    Compiling aho-corasick v0.6.10
[INFO] [stderr]    Compiling thread_local v0.3.6
[INFO] [stderr]    Compiling utf8-ranges v1.0.5
[INFO] [stderr]    Compiling regex-syntax v0.5.6
[INFO] [stderr]    Compiling generic-array v0.12.4
[INFO] [stderr]    Compiling block-buffer v0.7.3
[INFO] [stderr]    Compiling digest v0.8.1
[INFO] [stderr]    Compiling sha2 v0.8.2
[INFO] [stderr]    Compiling phf_generator v0.7.24
[INFO] [stderr]    Compiling string_cache_codegen v0.4.4
[INFO] [stderr]    Compiling string_cache v0.7.5
[INFO] [stderr]    Compiling serde_derive v1.0.219
[INFO] [stderr]    Compiling regex v0.2.11
[INFO] [stderr]    Compiling regex-automata v0.4.9
[INFO] [stderr]    Compiling regex v1.11.1
[INFO] [stderr]    Compiling docopt v1.1.1
[INFO] [stderr]    Compiling lalrpop v0.16.3
[INFO] [stderr]    Compiling shroom v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]     --> src/parser.rs:1816:5
[INFO] [stdout]      |
[INFO] [stdout] 1816 |     (__0)
[INFO] [stdout]      |     ^   ^
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]      |
[INFO] [stdout] 1816 -     (__0)
[INFO] [stdout] 1816 +     __0
[INFO] [stdout]      |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]     --> src/parser.rs:1831:5
[INFO] [stdout]      |
[INFO] [stdout] 1831 |     (__0)
[INFO] [stdout]      |     ^   ^
[INFO] [stdout]      |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]      |
[INFO] [stdout] 1831 -     (__0)
[INFO] [stdout] 1831 +     __0
[INFO] [stdout]      |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]     --> src/parser.rs:1846:5
[INFO] [stdout]      |
[INFO] [stdout] 1846 |     (__0)
[INFO] [stdout]      |     ^   ^
[INFO] [stdout]      |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]      |
[INFO] [stdout] 1846 -     (__0)
[INFO] [stdout] 1846 +     __0
[INFO] [stdout]      |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]     --> src/parser.rs:1911:5
[INFO] [stdout]      |
[INFO] [stdout] 1911 |     (__0)
[INFO] [stdout]      |     ^   ^
[INFO] [stdout]      |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]      |
[INFO] [stdout] 1911 -     (__0)
[INFO] [stdout] 1911 +     __0
[INFO] [stdout]      |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]     --> src/parser.rs:1926:5
[INFO] [stdout]      |
[INFO] [stdout] 1926 |     (__0)
[INFO] [stdout]      |     ^   ^
[INFO] [stdout]      |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]      |
[INFO] [stdout] 1926 -     (__0)
[INFO] [stdout] 1926 +     __0
[INFO] [stdout]      |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]     --> src/parser.rs:1941:5
[INFO] [stdout]      |
[INFO] [stdout] 1941 |     (__0)
[INFO] [stdout]      |     ^   ^
[INFO] [stdout]      |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]      |
[INFO] [stdout] 1941 -     (__0)
[INFO] [stdout] 1941 +     __0
[INFO] [stdout]      |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]     --> src/parser.rs:1956:5
[INFO] [stdout]      |
[INFO] [stdout] 1956 |     (__0)
[INFO] [stdout]      |     ^   ^
[INFO] [stdout]      |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]      |
[INFO] [stdout] 1956 -     (__0)
[INFO] [stdout] 1956 +     __0
[INFO] [stdout]      |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]     --> src/parser.rs:1981:5
[INFO] [stdout]      |
[INFO] [stdout] 1981 |     (__0)
[INFO] [stdout]      |     ^   ^
[INFO] [stdout]      |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]      |
[INFO] [stdout] 1981 -     (__0)
[INFO] [stdout] 1981 +     __0
[INFO] [stdout]      |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]     --> src/parser.rs:2006:5
[INFO] [stdout]      |
[INFO] [stdout] 2006 |     (__0)
[INFO] [stdout]      |     ^   ^
[INFO] [stdout]      |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]      |
[INFO] [stdout] 2006 -     (__0)
[INFO] [stdout] 2006 +     __0
[INFO] [stdout]      |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]     --> src/parser.rs:2041:5
[INFO] [stdout]      |
[INFO] [stdout] 2041 |     (__0)
[INFO] [stdout]      |     ^   ^
[INFO] [stdout]      |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]      |
[INFO] [stdout] 2041 -     (__0)
[INFO] [stdout] 2041 +     __0
[INFO] [stdout]      |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]     --> src/parser.rs:2056:5
[INFO] [stdout]      |
[INFO] [stdout] 2056 |     (__0)
[INFO] [stdout]      |     ^   ^
[INFO] [stdout]      |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]      |
[INFO] [stdout] 2056 -     (__0)
[INFO] [stdout] 2056 +     __0
[INFO] [stdout]      |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]     --> src/parser.rs:2071:5
[INFO] [stdout]      |
[INFO] [stdout] 2071 |     (__0)
[INFO] [stdout]      |     ^   ^
[INFO] [stdout]      |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]      |
[INFO] [stdout] 2071 -     (__0)
[INFO] [stdout] 2071 +     __0
[INFO] [stdout]      |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this attribute can only be applied at the crate level
[INFO] [stdout]  --> src/lib.rs:5:7
[INFO] [stdout]   |
[INFO] [stdout] 5 | #[doc(html_no_source)]
[INFO] [stdout]   |       ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: read <https://doc.rust-lang.org/nightly/rustdoc/the-doc-attribute.html#at-the-crate-level> for more information
[INFO] [stdout]   = note: `#[deny(invalid_doc_attributes)]` on by default
[INFO] [stdout] help: to apply to the crate, use an inner attribute
[INFO] [stdout]   |
[INFO] [stdout] 5 | #![doc(html_no_source)]
[INFO] [stdout]   |  +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `core::str::<impl str>::trim_left_matches`: superseded by `trim_start_matches`
[INFO] [stdout]    --> src/primitive.rs:127:27
[INFO] [stdout]     |
[INFO] [stdout] 127 |         let no_prefix = s.trim_left_matches("0x");
[INFO] [stdout]     |                           ^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] help: replace the use of the deprecated method
[INFO] [stdout]     |
[INFO] [stdout] 127 -         let no_prefix = s.trim_left_matches("0x");
[INFO] [stdout] 127 +         let no_prefix = s.trim_start_matches("0x");
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `core::str::<impl str>::trim_left_matches`: superseded by `trim_start_matches`
[INFO] [stdout]    --> src/primitive.rs:133:27
[INFO] [stdout]     |
[INFO] [stdout] 133 |         let no_prefix = s.trim_left_matches("0o");
[INFO] [stdout]     |                           ^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: replace the use of the deprecated method
[INFO] [stdout]     |
[INFO] [stdout] 133 -         let no_prefix = s.trim_left_matches("0o");
[INFO] [stdout] 133 +         let no_prefix = s.trim_start_matches("0o");
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `core::str::<impl str>::trim_left_matches`: superseded by `trim_start_matches`
[INFO] [stdout]    --> src/primitive.rs:139:27
[INFO] [stdout]     |
[INFO] [stdout] 139 |         let no_prefix = s.trim_left_matches("0b");
[INFO] [stdout]     |                           ^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: replace the use of the deprecated method
[INFO] [stdout]     |
[INFO] [stdout] 139 -         let no_prefix = s.trim_left_matches("0b");
[INFO] [stdout] 139 +         let no_prefix = s.trim_start_matches("0b");
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple variants are never constructed
[INFO] [stdout]   --> src/ast.rs:22:5
[INFO] [stdout]    |
[INFO] [stdout] 9  | pub enum BinOp {
[INFO] [stdout]    |          ----- variants in this enum
[INFO] [stdout] ...
[INFO] [stdout] 22 |     AddEq,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 23 |     SubEq,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 24 |     MulEq,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 25 |     DivEq,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 26 |     ModEq,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 27 |     PowEq,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 33 |     BitAndEq,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 34 |     BitOrEq,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 35 |     BitXorEq,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 38 |     LshiftEq,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 39 |     RshiftEq,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 40 |     Assign,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `BinOp` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `shroom` (lib) due to 1 previous error; 16 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "da1b32dc657dc69b48433e1dfe4f6060504af7c89302334aa2371be4649d6b3c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "da1b32dc657dc69b48433e1dfe4f6060504af7c89302334aa2371be4649d6b3c", kill_on_drop: false }`
[INFO] [stdout] da1b32dc657dc69b48433e1dfe4f6060504af7c89302334aa2371be4649d6b3c