[INFO] fetching crate stack-graphs 0.12.0...
[INFO] checking stack-graphs-0.12.0 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate stack-graphs 0.12.0 into /workspace/builds/worker-6-tc1/source
[INFO] validating manifest of crates.io crate stack-graphs 0.12.0 on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate stack-graphs 0.12.0
[INFO] finished tweaking crates.io crate stack-graphs 0.12.0
[INFO] tweaked toml for crates.io crate stack-graphs 0.12.0 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 77 packages
[INFO] [stderr]       Adding bitflags v1.3.2 (latest: v2.5.0)
[INFO] [stderr]       Adding ctor v0.1.26 (latest: v0.2.7)
[INFO] [stderr]       Adding embedded-io v0.4.0 (latest: v0.6.1)
[INFO] [stderr]       Adding fallible-iterator v0.2.0 (latest: v0.3.0)
[INFO] [stderr]       Adding hash32 v0.2.1 (latest: v0.3.1)
[INFO] [stderr]       Adding hashlink v0.8.4 (latest: v0.9.0)
[INFO] [stderr]       Adding heapless v0.7.17 (latest: v0.8.0)
[INFO] [stderr]       Adding itertools v0.10.5 (latest: v0.12.1)
[INFO] [stderr]       Adding libsqlite3-sys v0.25.2 (latest: v0.28.0)
[INFO] [stderr]       Adding pretty_assertions v0.7.2 (latest: v1.4.0)
[INFO] [stderr]       Adding radium v0.7.0 (latest: v1.1.0)
[INFO] [stderr]       Adding rusqlite v0.28.0 (latest: v0.31.0)
[INFO] [stderr]       Adding syn v1.0.109 (latest: v2.0.58)
[INFO] [stderr]       Adding wyz v0.5.1 (latest: v0.6.1)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded controlled-option-macros v0.2.2
[INFO] [stderr]   Downloaded lsp-positions v0.3.3
[INFO] [stderr]   Downloaded controlled-option v0.4.1
[INFO] [stderr]   Downloaded enumset_derive v0.8.1
[INFO] [stderr]   Downloaded enumset v1.1.3
[INFO] [stderr]   Downloaded pretty_assertions v0.7.2
[INFO] [stderr]   Downloaded rusqlite v0.28.0
[INFO] [stderr]   Downloaded libsqlite3-sys v0.25.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d3db638c118b4629d0ddf0e0df11175d52783b77db1580d20ebbe3b1d1c29210
[INFO] running `Command { std: "docker" "start" "-a" "d3db638c118b4629d0ddf0e0df11175d52783b77db1580d20ebbe3b1d1c29210", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d3db638c118b4629d0ddf0e0df11175d52783b77db1580d20ebbe3b1d1c29210", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d3db638c118b4629d0ddf0e0df11175d52783b77db1580d20ebbe3b1d1c29210", kill_on_drop: false }`
[INFO] [stdout] d3db638c118b4629d0ddf0e0df11175d52783b77db1580d20ebbe3b1d1c29210
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 96f26bd2edbaa9b704ddf9fadb6edae07dad9c94a9e0c58a413d9aad2d65a36f
[INFO] running `Command { std: "docker" "start" "-a" "96f26bd2edbaa9b704ddf9fadb6edae07dad9c94a9e0c58a413d9aad2d65a36f", kill_on_drop: false }`
[INFO] [stderr]    Compiling fnv v1.0.7
[INFO] [stderr]    Compiling ident_case v1.0.1
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling serde v1.0.197
[INFO] [stderr]    Compiling radium v0.7.0
[INFO] [stderr]     Checking tap v1.0.1
[INFO] [stderr]    Compiling libc v0.2.153
[INFO] [stderr]    Compiling syn v2.0.58
[INFO] [stderr]     Checking unicode-segmentation v1.11.0
[INFO] [stderr]     Checking byteorder v1.5.0
[INFO] [stderr]     Checking wyz v0.5.1
[INFO] [stderr]     Checking either v1.10.0
[INFO] [stderr]     Checking funty v2.0.0
[INFO] [stderr]     Checking lsp-positions v0.3.3
[INFO] [stderr]     Checking itertools v0.10.5
[INFO] [stderr]     Checking fxhash v0.2.1
[INFO] [stderr]     Checking smallvec v1.13.2
[INFO] [stderr]     Checking ansi_term v0.12.1
[INFO] [stderr]     Checking maplit v1.0.2
[INFO] [stderr]     Checking pretty_assertions v0.7.2
[INFO] [stderr]     Checking bitvec v1.0.1
[INFO] [stderr]    Compiling darling_core v0.20.8
[INFO] [stderr]     Checking serde_json v1.0.115
[INFO] [stderr]    Compiling thiserror-impl v1.0.58
[INFO] [stderr]     Checking assert-json-diff v2.0.2
[INFO] [stderr]    Compiling controlled-option-macros v0.2.2
[INFO] [stderr]     Checking controlled-option v0.4.1
[INFO] [stderr]    Compiling darling_macro v0.20.8
[INFO] [stderr]     Checking thiserror v1.0.58
[INFO] [stderr]    Compiling darling v0.20.8
[INFO] [stderr]    Compiling enumset_derive v0.8.1
[INFO] [stderr]     Checking enumset v1.1.3
[INFO] [stderr]     Checking stack-graphs v0.12.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 32.02s
[INFO] running `Command { std: "docker" "inspect" "96f26bd2edbaa9b704ddf9fadb6edae07dad9c94a9e0c58a413d9aad2d65a36f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "96f26bd2edbaa9b704ddf9fadb6edae07dad9c94a9e0c58a413d9aad2d65a36f", kill_on_drop: false }`
[INFO] [stdout] 96f26bd2edbaa9b704ddf9fadb6edae07dad9c94a9e0c58a413d9aad2d65a36f
[INFO] checking stack-graphs-0.12.0 against try#645bb72776a6a56a1a8f52631a44bd082b2ba509 for absurd-question-mark-desugar
[INFO] extracting crate stack-graphs 0.12.0 into /workspace/builds/worker-6-tc2/source
[INFO] validating manifest of crates.io crate stack-graphs 0.12.0 on toolchain 645bb72776a6a56a1a8f52631a44bd082b2ba509
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate stack-graphs 0.12.0
[INFO] finished tweaking crates.io crate stack-graphs 0.12.0
[INFO] tweaked toml for crates.io crate stack-graphs 0.12.0 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b2f4271264b847913d5e5c939833295270b90ac4175299dfd3882ef80728df0d
[INFO] running `Command { std: "docker" "start" "-a" "b2f4271264b847913d5e5c939833295270b90ac4175299dfd3882ef80728df0d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b2f4271264b847913d5e5c939833295270b90ac4175299dfd3882ef80728df0d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b2f4271264b847913d5e5c939833295270b90ac4175299dfd3882ef80728df0d", kill_on_drop: false }`
[INFO] [stdout] b2f4271264b847913d5e5c939833295270b90ac4175299dfd3882ef80728df0d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7d11dabbd2f6b415f417a934f44154f32fcdf9670c43846263e6f4bddda80dbf
[INFO] running `Command { std: "docker" "start" "-a" "7d11dabbd2f6b415f417a934f44154f32fcdf9670c43846263e6f4bddda80dbf", kill_on_drop: false }`
[INFO] [stderr]    Compiling fnv v1.0.7
[INFO] [stderr]    Compiling ident_case v1.0.1
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling serde v1.0.197
[INFO] [stderr]    Compiling radium v0.7.0
[INFO] [stderr]    Compiling libc v0.2.153
[INFO] [stderr]     Checking tap v1.0.1
[INFO] [stderr]    Compiling syn v2.0.58
[INFO] [stderr]     Checking unicode-segmentation v1.11.0
[INFO] [stderr]     Checking funty v2.0.0
[INFO] [stderr]     Checking wyz v0.5.1
[INFO] [stderr]     Checking either v1.10.0
[INFO] [stderr]     Checking byteorder v1.5.0
[INFO] [stderr]     Checking itertools v0.10.5
[INFO] [stderr]     Checking lsp-positions v0.3.3
[INFO] [stderr]     Checking ansi_term v0.12.1
[INFO] [stderr]     Checking bitvec v1.0.1
[INFO] [stderr]     Checking fxhash v0.2.1
[INFO] [stderr]     Checking smallvec v1.13.2
[INFO] [stderr]     Checking pretty_assertions v0.7.2
[INFO] [stderr]     Checking maplit v1.0.2
[INFO] [stderr]     Checking serde_json v1.0.115
[INFO] [stderr]    Compiling controlled-option-macros v0.2.2
[INFO] [stderr]    Compiling darling_core v0.20.8
[INFO] [stderr]     Checking assert-json-diff v2.0.2
[INFO] [stderr]     Checking controlled-option v0.4.1
[INFO] [stderr]    Compiling thiserror-impl v1.0.58
[INFO] [stderr]     Checking thiserror v1.0.58
[INFO] [stderr]    Compiling darling_macro v0.20.8
[INFO] [stderr]    Compiling darling v0.20.8
[INFO] [stderr]    Compiling enumset_derive v0.8.1
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/enumset_derive-0.8.1/src/lib.rs:212:21
[INFO] [stdout]     |
[INFO] [stdout] 212 |                     error(expr.span(), "Enum discriminants must not be negative.")?;
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ cannot infer type for type parameter `T` declared on the function `error`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/enumset_derive-0.8.1/src/lib.rs:283:13
[INFO] [stdout]     |
[INFO] [stdout] 283 | /             error(
[INFO] [stdout] 284 | |                 largest_discriminant_span,
[INFO] [stdout] 285 | |                 "`repr` is too small to contain the largest discriminant.",
[INFO] [stdout] 286 | |             )?;
[INFO] [stdout]     | |_____________^ cannot infer type for type parameter `T` declared on the function `error`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0282`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `enumset_derive` (lib) due to 3 previous errors
[INFO] running `Command { std: "docker" "inspect" "7d11dabbd2f6b415f417a934f44154f32fcdf9670c43846263e6f4bddda80dbf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7d11dabbd2f6b415f417a934f44154f32fcdf9670c43846263e6f4bddda80dbf", kill_on_drop: false }`
[INFO] [stdout] 7d11dabbd2f6b415f417a934f44154f32fcdf9670c43846263e6f4bddda80dbf