[INFO] fetching crate rustpython-compiler 0.4.0...
[INFO] checking rustpython-compiler-0.4.0 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate rustpython-compiler 0.4.0 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate rustpython-compiler 0.4.0
[INFO] finished tweaking crates.io crate rustpython-compiler 0.4.0
[INFO] tweaked toml for crates.io crate rustpython-compiler 0.4.0 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate rustpython-compiler 0.4.0 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] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 83 packages to latest compatible versions
[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] 8f714799c32c89f40b0e20f0cfc0d4dc7e9c27da6ef6b05c330866691ee43c5b
[INFO] running `Command { std: "docker" "start" "-a" "8f714799c32c89f40b0e20f0cfc0d4dc7e9c27da6ef6b05c330866691ee43c5b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8f714799c32c89f40b0e20f0cfc0d4dc7e9c27da6ef6b05c330866691ee43c5b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8f714799c32c89f40b0e20f0cfc0d4dc7e9c27da6ef6b05c330866691ee43c5b", kill_on_drop: false }`
[INFO] [stdout] 8f714799c32c89f40b0e20f0cfc0d4dc7e9c27da6ef6b05c330866691ee43c5b
[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] eed11e6a5ad08e335e586186f40adf15fe798e4958272074d6245526399b0d7b
[INFO] running `Command { std: "docker" "start" "-a" "eed11e6a5ad08e335e586186f40adf15fe798e4958272074d6245526399b0d7b", kill_on_drop: false }`
[INFO] [stderr]    Compiling libm v0.2.15
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling syn v2.0.110
[INFO] [stderr]     Checking ahash v0.8.12
[INFO] [stderr]    Compiling malachite-nz v0.4.22
[INFO] [stderr]     Checking unic-common v0.9.0
[INFO] [stderr]     Checking unic-char-range v0.9.0
[INFO] [stderr]     Checking lexical-util v0.8.5
[INFO] [stderr]     Checking unic-char-property v0.9.0
[INFO] [stderr]     Checking unic-ucd-version v0.9.0
[INFO] [stderr]    Compiling unicode-width v0.2.2
[INFO] [stderr]     Checking rustpython-parser-vendored v0.4.0
[INFO] [stderr]    Compiling crunchy v0.2.4
[INFO] [stderr]    Compiling tiny-keccak v2.0.2
[INFO] [stderr]     Checking hashbrown v0.14.5
[INFO] [stderr]     Checking unic-ucd-category v0.9.0
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling getopts v0.2.24
[INFO] [stderr]     Checking phf_shared v0.11.3
[INFO] [stderr]    Compiling anyhow v1.0.100
[INFO] [stderr]     Checking twox-hash v2.1.2
[INFO] [stderr]     Checking phf v0.11.3
[INFO] [stderr]     Checking unic-ucd-ident v0.9.0
[INFO] [stderr]     Checking lz4_flex v0.11.5
[INFO] [stderr]     Checking unic-emoji-char v0.9.0
[INFO] [stderr]     Checking lalrpop-util v0.20.2
[INFO] [stderr]     Checking lexical-parse-integer v0.8.6
[INFO] [stderr]    Compiling phf_generator v0.11.3
[INFO] [stderr]    Compiling phf_codegen v0.11.3
[INFO] [stderr]     Checking lexical-parse-float v0.8.5
[INFO] [stderr]    Compiling unicode_names2_generator v1.3.0
[INFO] [stderr]    Compiling rustpython-parser v0.4.0
[INFO] [stderr]     Checking malachite-base v0.4.22
[INFO] [stderr]    Compiling unicode_names2 v1.3.0
[INFO] [stderr]    Compiling is-macro v0.3.7
[INFO] [stderr]    Compiling derive_more-impl v1.0.0
[INFO] [stderr]     Checking rustpython-parser-core v0.4.0
[INFO] [stderr]     Checking rustpython-literal v0.4.0
[INFO] [stderr]     Checking derive_more v1.0.0
[INFO] [stderr]     Checking malachite-q v0.4.22
[INFO] [stderr]     Checking malachite v0.4.22
[INFO] [stderr]     Checking malachite-bigint v0.2.3
[INFO] [stderr]     Checking rustpython-ast v0.4.0
[INFO] [stderr]     Checking rustpython-compiler-core v0.4.0
[INFO] [stderr]     Checking rustpython-codegen v0.4.0
[INFO] [stderr]     Checking rustpython-compiler v0.4.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: this type will no longer be must used: Result<rustpython_parser::rustpython_ast::Mod, Infallible>
[INFO] [stdout]   --> src/lib.rs:61:15
[INFO] [stdout]    |
[INFO] [stdout] 61 |           ast = ConstantOptimizer::new()
[INFO] [stdout]    |  _______________^
[INFO] [stdout] 62 | |             .fold_mod(ast)
[INFO] [stdout]    | |__________________________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rustpython-compiler` (lib test) due to 4 previous errors
[INFO] [stdout] error: this type will no longer be must used: Result<rustpython_parser::rustpython_ast::Mod<SourceRange>, Infallible>
[INFO] [stdout]   --> src/lib.rs:65:15
[INFO] [stdout]    |
[INFO] [stdout] 65 |     let ast = locator.fold_mod(ast).unwrap_or_else(|e| match e {});
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: this type will no longer be must used: Result<Vec<rustpython_parser::rustpython_ast::Stmt<SourceRange>>, Infallible>
[INFO] [stdout]   --> src/lib.rs:79:23
[INFO] [stdout]    |
[INFO] [stdout] 79 |             let ast = locator.fold(ast).unwrap();
[INFO] [stdout]    |                       ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<rustpython_parser::rustpython_ast::Expr<SourceRange>, Infallible>
[INFO] [stdout]   --> src/lib.rs:85:24
[INFO] [stdout]    |
[INFO] [stdout] 85 |             let expr = locator.fold(expr).unwrap();
[INFO] [stdout]    |                        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<rustpython_parser::rustpython_ast::Mod, Infallible>
[INFO] [stdout]   --> src/lib.rs:61:15
[INFO] [stdout]    |
[INFO] [stdout] 61 |           ast = ConstantOptimizer::new()
[INFO] [stdout]    |  _______________^
[INFO] [stdout] 62 | |             .fold_mod(ast)
[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<rustpython_parser::rustpython_ast::Mod<SourceRange>, Infallible>
[INFO] [stdout]   --> src/lib.rs:65:15
[INFO] [stdout]    |
[INFO] [stdout] 65 |     let ast = locator.fold_mod(ast).unwrap_or_else(|e| match e {});
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rustpython-compiler` (lib) due to 4 previous errors
[INFO] [stdout] error: this type will no longer be must used: Result<Vec<rustpython_parser::rustpython_ast::Stmt<SourceRange>>, Infallible>
[INFO] [stdout]   --> src/lib.rs:79:23
[INFO] [stdout]    |
[INFO] [stdout] 79 |             let ast = locator.fold(ast).unwrap();
[INFO] [stdout]    |                       ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<rustpython_parser::rustpython_ast::Expr<SourceRange>, Infallible>
[INFO] [stdout]   --> src/lib.rs:85:24
[INFO] [stdout]    |
[INFO] [stdout] 85 |             let expr = locator.fold(expr).unwrap();
[INFO] [stdout]    |                        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "eed11e6a5ad08e335e586186f40adf15fe798e4958272074d6245526399b0d7b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "eed11e6a5ad08e335e586186f40adf15fe798e4958272074d6245526399b0d7b", kill_on_drop: false }`
[INFO] [stdout] eed11e6a5ad08e335e586186f40adf15fe798e4958272074d6245526399b0d7b
