[INFO] fetching crate ff-derive-num 0.2.0...
[INFO] testing ff-derive-num-0.2.0 against try#b83b707f97d809763b7861afa7638871f3339a33 for pr-145838-1
[INFO] extracting crate ff-derive-num 0.2.0 into /workspace/builds/worker-1-tc2/source
[INFO] started tweaking crates.io crate ff-derive-num 0.2.0
[INFO] finished tweaking crates.io crate ff-derive-num 0.2.0
[INFO] tweaked toml for crates.io crate ff-derive-num 0.2.0 written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate ff-derive-num 0.2.0 on toolchain b83b707f97d809763b7861afa7638871f3339a33
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b83b707f97d809763b7861afa7638871f3339a33" "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" "+b83b707f97d809763b7861afa7638871f3339a33" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 6 packages to latest compatible versions
[INFO] [stderr]       Adding syn v1.0.109 (available: v2.0.106)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b83b707f97d809763b7861afa7638871f3339a33" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
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[INFO] [stdout] d57c75389366f7b057c0a703639a37ee20da4f926abbbf09a32f99ea360d7a39
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[INFO] [stderr]    Compiling proc-macro2 v1.0.101
[INFO] [stderr]    Compiling autocfg v1.5.0
[INFO] [stderr]    Compiling unicode-ident v1.0.18
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]    Compiling quote v1.0.40
[INFO] [stderr]    Compiling ff-derive-num v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.85s
[INFO] running `Command { std: "docker" "inspect" "d57c75389366f7b057c0a703639a37ee20da4f926abbbf09a32f99ea360d7a39", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d57c75389366f7b057c0a703639a37ee20da4f926abbbf09a32f99ea360d7a39", kill_on_drop: false }`
[INFO] [stdout] d57c75389366f7b057c0a703639a37ee20da4f926abbbf09a32f99ea360d7a39
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+b83b707f97d809763b7861afa7638871f3339a33" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c156f5a0512dc82c55b5ac0a8cf6604a9d149cd6f3d0bb92d64ea9948c1280dd
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[INFO] [stderr]    Compiling ff-derive-num v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.33s
[INFO] running `Command { std: "docker" "inspect" "c156f5a0512dc82c55b5ac0a8cf6604a9d149cd6f3d0bb92d64ea9948c1280dd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c156f5a0512dc82c55b5ac0a8cf6604a9d149cd6f3d0bb92d64ea9948c1280dd", kill_on_drop: false }`
[INFO] [stdout] c156f5a0512dc82c55b5ac0a8cf6604a9d149cd6f3d0bb92d64ea9948c1280dd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+b83b707f97d809763b7861afa7638871f3339a33" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 9d3e905c8b41494c7595d6da199556d5497e230b81c702a1bbdec1bb030771c3
[INFO] running `Command { std: "docker" "start" "-a" "9d3e905c8b41494c7595d6da199556d5497e230b81c702a1bbdec1bb030771c3", kill_on_drop: false }`
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/ff_derive_num-3d88ddfb8675a7a9)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests ff_derive_num
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test src/lib.rs - (line 22) ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- src/lib.rs - (line 22) stdout ----
[INFO] [stdout] error[E0432]: unresolved import `ff`
[INFO] [stdout]  --> src/lib.rs:24:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use ff::PrimeField;         // ff should be used with the "derive" feature!
[INFO] [stdout]   |     ^^ use of unresolved module or unlinked crate `ff`
[INFO] [stdout]   |
[INFO] [stdout]   = help: if you wanted to use a crate named `ff`, use `cargo add ff` to add it to your `Cargo.toml`
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `ff`
[INFO] [stdout]  --> src/lib.rs:27:21
[INFO] [stdout]   |
[INFO] [stdout] 8 | #[derive(PrimeField,Num)]
[INFO] [stdout]   |                     ^^^ could not find `ff` in the list of imported crates
[INFO] [stdout]   |
[INFO] [stdout]   = note: this error originates in the derive macro `Num` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `PrimeFieldModulus` in this scope
[INFO] [stdout]  --> src/lib.rs:28:3
[INFO] [stdout]   |
[INFO] [stdout] 9 | #[PrimeFieldModulus = "70386805592835581672624750593"]
[INFO] [stdout]   |   ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `PrimeFieldGenerator` in this scope
[INFO] [stdout]   --> src/lib.rs:29:3
[INFO] [stdout]    |
[INFO] [stdout] 10 | #[PrimeFieldGenerator = "17"]
[INFO] [stdout]    |   ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `PrimeFieldReprEndianness` in this scope
[INFO] [stdout]   --> src/lib.rs:30:3
[INFO] [stdout]    |
[INFO] [stdout] 11 | #[PrimeFieldReprEndianness = "little"]
[INFO] [stdout]    |   ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: could not find `ff` in the list of imported crates
[INFO] [stdout]  --> src/lib.rs:27:21
[INFO] [stdout]   |
[INFO] [stdout] 8 | #[derive(PrimeField,Num)]
[INFO] [stdout]   |                     ^^^ could not find `ff` in the list of imported crates
[INFO] [stdout]   |
[INFO] [stdout]   = note: this error originates in the derive macro `Num` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: can't compare `Ft` with `Ft`
[INFO] [stdout]   --> src/lib.rs:27:21
[INFO] [stdout]    |
[INFO] [stdout]  8 | #[derive(PrimeField,Num)]
[INFO] [stdout]    |                     ^^^ no implementation for `Ft == Ft`
[INFO] [stdout]    |
[INFO] [stdout]    = help: the trait `PartialEq` is not implemented for `Ft`
[INFO] [stdout] note: required by a bound in `Num`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/num-traits-0.2.19/src/lib.rs:67:16
[INFO] [stdout]    |
[INFO] [stdout] 67 | pub trait Num: PartialEq + Zero + One + NumOps {
[INFO] [stdout]    |                ^^^^^^^^^ required by this bound in `Num`
[INFO] [stdout]    = note: this error originates in the derive macro `Num` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: consider annotating `Ft` with `#[derive(PartialEq)]`
[INFO] [stdout]    |
[INFO] [stdout] 12 + #[derive(PartialEq)]
[INFO] [stdout] 13 | pub struct Ft([u64; 2]);
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: cannot subtract `Ft` from `Ft`
[INFO] [stdout]   --> src/lib.rs:27:21
[INFO] [stdout]    |
[INFO] [stdout]  8 | #[derive(PrimeField,Num)]
[INFO] [stdout]    |                     ^^^ no implementation for `Ft - Ft`
[INFO] [stdout]    |
[INFO] [stdout] help: the trait `Sub` is not implemented for `Ft`
[INFO] [stdout]   --> src/lib.rs:31:1
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub struct Ft([u64; 2]);
[INFO] [stdout]    | ^^^^^^^^^^^^^
[INFO] [stdout]    = note: required for `Ft` to implement `NumOps`
[INFO] [stdout] note: required by a bound in `Num`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/num-traits-0.2.19/src/lib.rs:67:41
[INFO] [stdout]    |
[INFO] [stdout] 67 | pub trait Num: PartialEq + Zero + One + NumOps {
[INFO] [stdout]    |                                         ^^^^^^ required by this bound in `Num`
[INFO] [stdout]    = note: this error originates in the derive macro `Num` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: cannot multiply `Ft` by `Ft`
[INFO] [stdout]   --> src/lib.rs:27:21
[INFO] [stdout]    |
[INFO] [stdout]  8 | #[derive(PrimeField,Num)]
[INFO] [stdout]    |                     ^^^ no implementation for `Ft * Ft`
[INFO] [stdout]    |
[INFO] [stdout] help: the trait `Mul` is not implemented for `Ft`
[INFO] [stdout]   --> src/lib.rs:31:1
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub struct Ft([u64; 2]);
[INFO] [stdout]    | ^^^^^^^^^^^^^
[INFO] [stdout]    = note: required for `Ft` to implement `NumOps`
[INFO] [stdout] note: required by a bound in `Num`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/num-traits-0.2.19/src/lib.rs:67:41
[INFO] [stdout]    |
[INFO] [stdout] 67 | pub trait Num: PartialEq + Zero + One + NumOps {
[INFO] [stdout]    |                                         ^^^^^^ required by this bound in `Num`
[INFO] [stdout]    = note: this error originates in the derive macro `Num` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: cannot add `Ft` to `Ft`
[INFO] [stdout]   --> src/lib.rs:27:21
[INFO] [stdout]    |
[INFO] [stdout]  8 | #[derive(PrimeField,Num)]
[INFO] [stdout]    |                     ^^^ no implementation for `Ft + Ft`
[INFO] [stdout]    |
[INFO] [stdout] help: the trait `Add` is not implemented for `Ft`
[INFO] [stdout]   --> src/lib.rs:31:1
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub struct Ft([u64; 2]);
[INFO] [stdout]    | ^^^^^^^^^^^^^
[INFO] [stdout]    = note: required for `Ft` to implement `NumOps`
[INFO] [stdout] note: required by a bound in `Num`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/num-traits-0.2.19/src/lib.rs:67:41
[INFO] [stdout]    |
[INFO] [stdout] 67 | pub trait Num: PartialEq + Zero + One + NumOps {
[INFO] [stdout]    |                                         ^^^^^^ required by this bound in `Num`
[INFO] [stdout]    = note: this error originates in the derive macro `Num` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: cannot multiply `Ft` by `Ft`
[INFO] [stdout]   --> src/lib.rs:31:12
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub struct Ft([u64; 2]);
[INFO] [stdout]    |            ^^ no implementation for `Ft * Ft`
[INFO] [stdout]    |
[INFO] [stdout] help: the trait `Mul` is not implemented for `Ft`
[INFO] [stdout]   --> src/lib.rs:31:1
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub struct Ft([u64; 2]);
[INFO] [stdout]    | ^^^^^^^^^^^^^
[INFO] [stdout]    = note: required for `Ft` to implement `NumOps`
[INFO] [stdout] note: required by a bound in `Num`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/num-traits-0.2.19/src/lib.rs:67:41
[INFO] [stdout]    |
[INFO] [stdout] 67 | pub trait Num: PartialEq + Zero + One + NumOps {
[INFO] [stdout]    |                                         ^^^^^^ required by this bound in `Num`
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: cannot subtract `Ft` from `Ft`
[INFO] [stdout]   --> src/lib.rs:31:12
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub struct Ft([u64; 2]);
[INFO] [stdout]    |            ^^ no implementation for `Ft - Ft`
[INFO] [stdout]    |
[INFO] [stdout] help: the trait `Sub` is not implemented for `Ft`
[INFO] [stdout]   --> src/lib.rs:31:1
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub struct Ft([u64; 2]);
[INFO] [stdout]    | ^^^^^^^^^^^^^
[INFO] [stdout]    = note: required for `Ft` to implement `NumOps`
[INFO] [stdout] note: required by a bound in `Num`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/num-traits-0.2.19/src/lib.rs:67:41
[INFO] [stdout]    |
[INFO] [stdout] 67 | pub trait Num: PartialEq + Zero + One + NumOps {
[INFO] [stdout]    |                                         ^^^^^^ required by this bound in `Num`
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: cannot add `Ft` to `Ft`
[INFO] [stdout]   --> src/lib.rs:31:12
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub struct Ft([u64; 2]);
[INFO] [stdout]    |            ^^ no implementation for `Ft + Ft`
[INFO] [stdout]    |
[INFO] [stdout] help: the trait `Add` is not implemented for `Ft`
[INFO] [stdout]   --> src/lib.rs:31:1
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub struct Ft([u64; 2]);
[INFO] [stdout]    | ^^^^^^^^^^^^^
[INFO] [stdout]    = note: required for `Ft` to implement `NumOps`
[INFO] [stdout] note: required by a bound in `Num`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/num-traits-0.2.19/src/lib.rs:67:41
[INFO] [stdout]    |
[INFO] [stdout] 67 | pub trait Num: PartialEq + Zero + One + NumOps {
[INFO] [stdout]    |                                         ^^^^^^ required by this bound in `Num`
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: can't compare `Ft` with `Ft`
[INFO] [stdout]   --> src/lib.rs:31:12
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub struct Ft([u64; 2]);
[INFO] [stdout]    |            ^^ no implementation for `Ft == Ft`
[INFO] [stdout]    |
[INFO] [stdout]    = help: the trait `PartialEq` is not implemented for `Ft`
[INFO] [stdout] note: required by a bound in `Num`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/num-traits-0.2.19/src/lib.rs:67:16
[INFO] [stdout]    |
[INFO] [stdout] 67 | pub trait Num: PartialEq + Zero + One + NumOps {
[INFO] [stdout]    |                ^^^^^^^^^ required by this bound in `Num`
[INFO] [stdout] help: consider annotating `Ft` with `#[derive(PartialEq)]`
[INFO] [stdout]    |
[INFO] [stdout] 12 + #[derive(PartialEq)]
[INFO] [stdout] 13 | pub struct Ft([u64; 2]);
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: cannot add `Ft` to `Ft`
[INFO] [stdout]   --> src/lib.rs:31:12
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub struct Ft([u64; 2]);
[INFO] [stdout]    |            ^^ no implementation for `Ft + Ft`
[INFO] [stdout]    |
[INFO] [stdout] help: the trait `Add` is not implemented for `Ft`
[INFO] [stdout]   --> src/lib.rs:31:1
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub struct Ft([u64; 2]);
[INFO] [stdout]    | ^^^^^^^^^^^^^
[INFO] [stdout] note: required by a bound in `num_traits::Zero`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/num-traits-0.2.19/src/identities.rs:12:25
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub trait Zero: Sized + Add<Self, Output = Self> {
[INFO] [stdout]    |                         ^^^^^^^^^^^^^^^^^^^^^^^^ required by this bound in `Zero`
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: cannot multiply `Ft` by `Ft`
[INFO] [stdout]    --> src/lib.rs:31:12
[INFO] [stdout]     |
[INFO] [stdout]  12 | pub struct Ft([u64; 2]);
[INFO] [stdout]     |            ^^ no implementation for `Ft * Ft`
[INFO] [stdout]     |
[INFO] [stdout] help: the trait `Mul` is not implemented for `Ft`
[INFO] [stdout]    --> src/lib.rs:31:1
[INFO] [stdout]     |
[INFO] [stdout]  12 | pub struct Ft([u64; 2]);
[INFO] [stdout]     | ^^^^^^^^^^^^^
[INFO] [stdout] note: required by a bound in `One`
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/num-traits-0.2.19/src/identities.rs:106:24
[INFO] [stdout]     |
[INFO] [stdout] 106 | pub trait One: Sized + Mul<Self, Output = Self> {
[INFO] [stdout]     |                        ^^^^^^^^^^^^^^^^^^^^^^^^ required by this bound in `One`
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]  --> src/lib.rs:27:21
[INFO] [stdout]   |
[INFO] [stdout] 8 | #[derive(PrimeField,Num)]
[INFO] [stdout]   |                     ^^^
[INFO] [stdout]   |                     |
[INFO] [stdout]   |                     expected `Ft`, found `u64`
[INFO] [stdout]   |                     arguments to this function are incorrect
[INFO] [stdout]   |
[INFO] [stdout] note: associated function defined here
[INFO] [stdout]  --> /rustc/b83b707f97d809763b7861afa7638871f3339a33/library/core/src/convert/mod.rs:596:8
[INFO] [stdout]   = note: this error originates in the derive macro `Num` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] error[E0368]: binary assignment operation `*=` cannot be applied to type `Ft`
[INFO] [stdout]   --> src/lib.rs:27:21
[INFO] [stdout]    |
[INFO] [stdout]  8 | #[derive(PrimeField,Num)]
[INFO] [stdout]    |                     ^^^ cannot use `*=` on type `Ft`
[INFO] [stdout]    |
[INFO] [stdout] note: an implementation of `MulAssign<&Ft>` might be missing for `Ft`
[INFO] [stdout]   --> src/lib.rs:31:1
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub struct Ft([u64; 2]);
[INFO] [stdout]    | ^^^^^^^^^^^^^ must implement `MulAssign<&Ft>`
[INFO] [stdout] note: the trait `MulAssign` must be implemented
[INFO] [stdout]   --> /rustc/b83b707f97d809763b7861afa7638871f3339a33/library/core/src/ops/arith.rs:911:1
[INFO] [stdout]    = note: this error originates in the derive macro `Num` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] error[E0368]: binary assignment operation `+=` cannot be applied to type `Ft`
[INFO] [stdout]   --> src/lib.rs:27:21
[INFO] [stdout]    |
[INFO] [stdout]  8 | #[derive(PrimeField,Num)]
[INFO] [stdout]    |                     ^^^ cannot use `+=` on type `Ft`
[INFO] [stdout]    |
[INFO] [stdout] note: an implementation of `AddAssign<&Ft>` might be missing for `Ft`
[INFO] [stdout]   --> src/lib.rs:31:1
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub struct Ft([u64; 2]);
[INFO] [stdout]    | ^^^^^^^^^^^^^ must implement `AddAssign<&Ft>`
[INFO] [stdout] note: the trait `AddAssign` must be implemented
[INFO] [stdout]   --> /rustc/b83b707f97d809763b7861afa7638871f3339a33/library/core/src/ops/arith.rs:776:1
[INFO] [stdout]    = note: this error originates in the derive macro `Num` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 19 previous errors
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0277, E0308, E0368, E0432, E0433.
[INFO] [stdout] For more information about an error, try `rustc --explain E0277`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     src/lib.rs - (line 22)
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 0 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.19s
[INFO] [stdout] 
[INFO] [stderr] error: doctest failed, to rerun pass `--doc`
[INFO] running `Command { std: "docker" "inspect" "9d3e905c8b41494c7595d6da199556d5497e230b81c702a1bbdec1bb030771c3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9d3e905c8b41494c7595d6da199556d5497e230b81c702a1bbdec1bb030771c3", kill_on_drop: false }`
[INFO] [stdout] 9d3e905c8b41494c7595d6da199556d5497e230b81c702a1bbdec1bb030771c3