[INFO] fetching crate rustpython-unparser 0.2.4...
[INFO] checking rustpython-unparser-0.2.4 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate rustpython-unparser 0.2.4 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate rustpython-unparser 0.2.4
[INFO] finished tweaking crates.io crate rustpython-unparser 0.2.4
[INFO] tweaked toml for crates.io crate rustpython-unparser 0.2.4 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate rustpython-unparser 0.2.4 on toolchain 4f260f0f20b3133d20cfb50353c0221943af5796
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate rustpython-unparser 0.2.4 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" "+4f260f0f20b3133d20cfb50353c0221943af5796" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 52c5f0bee370a978d255bfa3058a0148e81d59b0c302e2d0baa7327d980d0a3e
[INFO] running `Command { std: "docker" "start" "-a" "52c5f0bee370a978d255bfa3058a0148e81d59b0c302e2d0baa7327d980d0a3e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "52c5f0bee370a978d255bfa3058a0148e81d59b0c302e2d0baa7327d980d0a3e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "52c5f0bee370a978d255bfa3058a0148e81d59b0c302e2d0baa7327d980d0a3e", kill_on_drop: false }`
[INFO] [stdout] 52c5f0bee370a978d255bfa3058a0148e81d59b0c302e2d0baa7327d980d0a3e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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 -Dunmustuse_in_always_ok" "-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 78b6fcef922195b6392e8db7ded37121a8973f61f143360264ac55d3a0e0bd42
[INFO] running `Command { std: "docker" "start" "-a" "78b6fcef922195b6392e8db7ded37121a8973f61f143360264ac55d3a0e0bd42", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v2.0.94
[INFO] [stderr]    Compiling libc v0.2.169
[INFO] [stderr]     Checking byteorder v1.5.0
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]     Checking once_cell v1.20.2
[INFO] [stderr]    Compiling siphasher v0.3.11
[INFO] [stderr]    Compiling libm v0.2.11
[INFO] [stderr]     Checking either v1.13.0
[INFO] [stderr]     Checking unic-common v0.9.0
[INFO] [stderr]     Checking unic-char-range v0.9.0
[INFO] [stderr]    Compiling malachite-nz v0.4.16
[INFO] [stderr]     Checking ryu v1.0.18
[INFO] [stderr]    Compiling ahash v0.8.11
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]     Checking lexical-util v0.8.5
[INFO] [stderr]     Checking unic-ucd-version v0.9.0
[INFO] [stderr]    Compiling crunchy v0.2.2
[INFO] [stderr]    Compiling unicode-width v0.1.14
[INFO] [stderr]    Compiling convert_case v0.4.0
[INFO] [stderr]     Checking unic-char-property v0.9.0
[INFO] [stderr]    Compiling tiny-keccak v2.0.2
[INFO] [stderr]     Checking matches v0.1.10
[INFO] [stderr]    Compiling anyhow v1.0.95
[INFO] [stderr]    Compiling log v0.4.22
[INFO] [stderr]     Checking rustpython-parser-vendored v0.4.0
[INFO] [stderr]     Checking unic-ucd-category v0.9.0
[INFO] [stderr]     Checking itertools v0.11.0
[INFO] [stderr]     Checking hexf-parse v0.2.1
[INFO] [stderr]    Compiling phf_shared v0.11.2
[INFO] [stderr]    Compiling getopts v0.2.21
[INFO] [stderr]     Checking unic-ucd-ident v0.9.0
[INFO] [stderr]     Checking unic-emoji-char v0.9.0
[INFO] [stderr]     Checking yansi v1.0.1
[INFO] [stderr]     Checking lalrpop-util v0.20.2
[INFO] [stderr]     Checking diff v0.1.13
[INFO] [stderr]     Checking rustc-hash v1.1.0
[INFO] [stderr]     Checking pretty_assertions v1.4.1
[INFO] [stderr]     Checking phf v0.11.2
[INFO] [stderr]     Checking getrandom v0.2.15
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking lexical-parse-integer v0.8.6
[INFO] [stderr]     Checking num-integer v0.1.46
[INFO] [stderr]     Checking lexical-parse-float v0.8.5
[INFO] [stderr]    Compiling zerocopy-derive v0.7.35
[INFO] [stderr]    Compiling is-macro v0.3.7
[INFO] [stderr]    Compiling derive_more v0.99.18
[INFO] [stderr]     Checking rustpython-parser-core v0.4.0
[INFO] [stderr]     Checking rustpython-literal v0.4.0
[INFO] [stderr]     Checking zerocopy v0.7.35
[INFO] [stderr]    Compiling ppv-lite86 v0.2.20
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]     Checking hashbrown v0.14.5
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]     Checking malachite-base v0.4.16
[INFO] [stderr]    Compiling phf_generator v0.11.2
[INFO] [stderr]    Compiling phf_codegen v0.11.2
[INFO] [stderr]    Compiling unicode_names2_generator v1.3.0
[INFO] [stderr]    Compiling rustpython-parser v0.4.0
[INFO] [stderr]    Compiling unicode_names2 v1.3.0
[INFO] [stderr]     Checking malachite-q v0.4.16
[INFO] [stderr]     Checking malachite v0.4.16
[INFO] [stderr]     Checking malachite-bigint v0.2.0
[INFO] [stderr]     Checking rustpython-ast v0.4.0
[INFO] [stderr]     Checking rustpython-unparser v0.2.4 (/opt/rustwide/workdir)
[INFO] [stdout] error: this type will no longer be must used: Result<TextRange, Infallible>
[INFO] [stdout]   --> src/lib.rs:38:49
[INFO] [stdout]    |
[INFO] [stdout] 38 |           ) -> Result<Self::TargetU, Self::Error> {
[INFO] [stdout]    |  _________________________________________________^
[INFO] [stdout] 39 | |             Ok(start)
[INFO] [stdout] 40 | |         }
[INFO] [stdout]    | |_________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<TextRange, Infallible>
[INFO] [stdout]   --> src/lib.rs:39:13
[INFO] [stdout]    |
[INFO] [stdout] 39 |             Ok(start)
[INFO] [stdout]    |             ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<rustpython_ast::Stmt, Infallible>
[INFO] [stdout]   --> src/lib.rs:88:43
[INFO] [stdout]    |
[INFO] [stdout] 88 |                     erased_new_stmts.push(eraser.fold_stmt(stmt.to_owned()).unwrap());
[INFO] [stdout]    |                                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<rustpython_ast::Stmt, Infallible>
[INFO] [stdout]   --> src/lib.rs:93:39
[INFO] [stdout]    |
[INFO] [stdout] 93 |                     erased_stmts.push(eraser.fold_stmt(stmt.to_owned()).unwrap());
[INFO] [stdout]    |                                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rustpython-unparser` (lib test) due to 4 previous errors
[INFO] running `Command { std: "docker" "inspect" "78b6fcef922195b6392e8db7ded37121a8973f61f143360264ac55d3a0e0bd42", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "78b6fcef922195b6392e8db7ded37121a8973f61f143360264ac55d3a0e0bd42", kill_on_drop: false }`
[INFO] [stdout] 78b6fcef922195b6392e8db7ded37121a8973f61f143360264ac55d3a0e0bd42
