[INFO] fetching crate fn_der 0.1.3...
[INFO] checking fn_der-0.1.3 against master#c2f2db79ca3024f68d22b45aa22b570775c2c4ad for pr-124157
[INFO] extracting crate fn_der 0.1.3 into /workspace/builds/worker-3-tc1/source
[INFO] validating manifest of crates.io crate fn_der 0.1.3 on toolchain c2f2db79ca3024f68d22b45aa22b570775c2c4ad
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c2f2db79ca3024f68d22b45aa22b570775c2c4ad" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate fn_der 0.1.3
[INFO] finished tweaking crates.io crate fn_der 0.1.3
[INFO] tweaked toml for crates.io crate fn_der 0.1.3 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c2f2db79ca3024f68d22b45aa22b570775c2c4ad" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 2 packages to latest compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c2f2db79ca3024f68d22b45aa22b570775c2c4ad" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded fn_grad v0.1.3
[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@sha256:99613afd962a8cfa530ec1899472a458bd015a1ab0af876cf7eb06f6006d81ea" "/opt/rustwide/cargo-home/bin/cargo" "+c2f2db79ca3024f68d22b45aa22b570775c2c4ad" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 17f6e07048af463f2a4429b93cd7974701c04767ced01f741c863ba96792a563
[INFO] running `Command { std: "docker" "start" "-a" "17f6e07048af463f2a4429b93cd7974701c04767ced01f741c863ba96792a563", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "17f6e07048af463f2a4429b93cd7974701c04767ced01f741c863ba96792a563", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "17f6e07048af463f2a4429b93cd7974701c04767ced01f741c863ba96792a563", kill_on_drop: false }`
[INFO] [stdout] 17f6e07048af463f2a4429b93cd7974701c04767ced01f741c863ba96792a563
[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@sha256:99613afd962a8cfa530ec1899472a458bd015a1ab0af876cf7eb06f6006d81ea" "/opt/rustwide/cargo-home/bin/cargo" "+c2f2db79ca3024f68d22b45aa22b570775c2c4ad" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f362e13a593ac4e3757f866584c4530c0e871779099592b33ac9b4d6122a105b
[INFO] running `Command { std: "docker" "start" "-a" "f362e13a593ac4e3757f866584c4530c0e871779099592b33ac9b4d6122a105b", kill_on_drop: false }`
[INFO] [stderr]     Checking fn_grad v0.1.3
[INFO] [stderr]     Checking fn_der v0.1.3 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0015]: cannot call non-const fn `<Self as fn_grad::FnGradOnce<(Arg,)>>::gradient_once` in constant functions
[INFO] [stdout]   --> src/lib.rs:15:14
[INFO] [stdout]    |
[INFO] [stdout] 15 |         self.gradient_once((arg,))
[INFO] [stdout]    |              ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: calls in constant functions are limited to constant functions, tuple structs and tuple variants
[INFO] [stdout] help: add `#![feature(effects)]` to the crate attributes to enable
[INFO] [stdout]    |
[INFO] [stdout] 6  + #![feature(effects)]
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0015]: cannot call non-const fn `<Self as fn_grad::FnGradOnce<(Arg,)>>::gradient_once` in constant functions
[INFO] [stdout]   --> src/lib.rs:15:14
[INFO] [stdout]    |
[INFO] [stdout] 15 |         self.gradient_once((arg,))
[INFO] [stdout]    |              ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: calls in constant functions are limited to constant functions, tuple structs and tuple variants
[INFO] [stdout] help: add `#![feature(effects)]` to the crate attributes to enable
[INFO] [stdout]    |
[INFO] [stdout] 6  + #![feature(effects)]
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0015]: cannot call non-const fn `<Self as fn_grad::FnGradMut<(Arg,)>>::gradient_mut` in constant functions
[INFO] [stdout]   --> src/lib.rs:24:14
[INFO] [stdout]    |
[INFO] [stdout] 24 |         self.gradient_mut((arg,))
[INFO] [stdout]    |              ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: calls in constant functions are limited to constant functions, tuple structs and tuple variants
[INFO] [stdout] help: add `#![feature(effects)]` to the crate attributes to enable
[INFO] [stdout]    |
[INFO] [stdout] 6  + #![feature(effects)]
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0015]: cannot call non-const fn `<Self as fn_grad::FnGradMut<(Arg,)>>::gradient_mut` in constant functions
[INFO] [stdout]   --> src/lib.rs:24:14
[INFO] [stdout]    |
[INFO] [stdout] 24 |         self.gradient_mut((arg,))
[INFO] [stdout]    |              ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: calls in constant functions are limited to constant functions, tuple structs and tuple variants
[INFO] [stdout] help: add `#![feature(effects)]` to the crate attributes to enable
[INFO] [stdout]    |
[INFO] [stdout] 6  + #![feature(effects)]
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0015]: cannot call non-const fn `<Self as fn_grad::FnGrad<(Arg,)>>::gradient` in constant functions
[INFO] [stdout]   --> src/lib.rs:33:14
[INFO] [stdout]    |
[INFO] [stdout] 33 |         self.gradient((arg,))
[INFO] [stdout]    |              ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: calls in constant functions are limited to constant functions, tuple structs and tuple variants
[INFO] [stdout] help: add `#![feature(effects)]` to the crate attributes to enable
[INFO] [stdout]    |
[INFO] [stdout] 6  + #![feature(effects)]
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0015]: cannot call non-const fn `<Self as fn_grad::FnGrad<(Arg,)>>::gradient` in constant functions
[INFO] [stdout]   --> src/lib.rs:33:14
[INFO] [stdout]    |
[INFO] [stdout] 33 |         self.gradient((arg,))
[INFO] [stdout]    |              ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: calls in constant functions are limited to constant functions, tuple structs and tuple variants
[INFO] [stdout] help: add `#![feature(effects)]` to the crate attributes to enable
[INFO] [stdout]    |
[INFO] [stdout] 6  + #![feature(effects)]
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0015`.
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0015`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `fn_der` (lib) due to 4 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `fn_der` (lib test) due to 4 previous errors
[INFO] running `Command { std: "docker" "inspect" "f362e13a593ac4e3757f866584c4530c0e871779099592b33ac9b4d6122a105b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f362e13a593ac4e3757f866584c4530c0e871779099592b33ac9b4d6122a105b", kill_on_drop: false }`
[INFO] [stdout] f362e13a593ac4e3757f866584c4530c0e871779099592b33ac9b4d6122a105b
