arbitrary

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Allow custom arbitrary methods for fields in the custom derive

5

Sometimes a field of a struct doesn't implement arbitrary and it is either impossible to do (because it is from another crate, for example) or undesired. We should support some...

fitzgen

Reversed arbitrary

10

Hello, I've been toying with custom mutators in cargo-fuzz with libfuzzer and it seems to me to support changes to typed data instead of bytes, the reversed arbrirtary operation would...

epilys

int_in_range can return out-of-range values

2

I was able to get `0` out of `int_in_range(1..=i32::MAX)`, which is less than the minimum specified value of `1`! Here's what I think is happening in `int_in_range_impl`: * Suppose when...

jnb

Arbitrary derive fails with lifetimes in some cases

3

Hello! Bear with me as I am new to Arbitrary. I have this type from [juniper](https://github.com/graphql-rust/juniper): ```rust pub struct Arguments, Spanning)>, } ``` `Spanning` and `InputValue` successfully `derive(arbitrary::Arbitrary))`. When I...

LegNeato

Allow `Unstructured` to be backed by an iterator of bytes instead of a byte slice?

4

In our use case, we are not using Arbitrary for fuzzing, but simply for creating arbitrary fixture values in tests. Currently we create a 10MB static `Vec` of random noise...

maackle

WIP: Add `dearbitrary` functionality to turn an instance into its arbitrary byte sequence

4

This PR solves issue #44 by implementing a `dearbitrary` function to create a byte buf, which can be used again with `arbitrary` to recreate the struct. It is not a...

bitwave

Allow getting an arbitrary length with a maximum upper bound

1

Sometimes you don't want more than N things generated because, for example, it makes the fuzz target too slow and run up against libfuzzer timeouts. A solution to this is...

fitzgen

Add support for no_std compilation.

11

This adds a "std" feature that enables support for compilation with std. Without this feature, the library becomes compatible with #![no_std] crates. By default, the library compiles with support for...

tmroeder

Deriving `Arbitrary` on a field containing a `Cow<'static, str>` fails.

1

For example, the following code (using version `1.0.1`) fails to compile. ```rust use std::borrow::Cow; #[derive(arbitrary::Arbitrary)] pub struct WithACow { cow: Cow src/main.rs:3:10 | 3 | #[derive(arbitrary::Arbitrary)] | ^^^^^^^^^^^^^^^^^^^^ | note:...

teymour-aldridge

Avoid returning errors where possible

1

https://github.com/rust-fuzz/arbitrary/commit/1d2f65360f634968b5525f4d6430a88a376277f0 > Next breaking release that we make, I think we can remove the fallibility from the `Arbitrary` trait and all the `Unstructured` methods. This wasn't addressed in the discussion...

e00E