Setup

Versions

• Diesel: 2.2.7

Feature Flags

• diesel: numeric

Problem Description

The bigint crate dependencies are given as loose ranges:

num-bigint = { version = ">=0.2.0, <0.5.0", optional = true }
bigdecimal = { version = ">=0.0.13, < 0.5.0", optional = true }

bigdecimal in turn depends on bigint, but with a more rigid range as is customary for 0.x dependencies in cargo (e.g. bigdecimal 0.4.7 depends on num-bigint ^0.4). Usually there is no problem as there is a single num-bigint version to settle on.

However, in a large workspace that has diesel in the dependency tree, multiple versions of num-bigint or bigdecimal may be pulled by different crates. This can lead to a different version of num-bigint being selected for diesel than the one selected for bigdecimal, resulting in a compilation failure due to missing num-bigint trait implementations for the version required by diesel.

Here's an example: movementlabsxyz/aptos-core#132

Checklist

• I have already looked over the issue tracker and the discussion forum for similar possible closed issues.
• This issue can be reproduced on Rust's stable channel. (Your issue will be
  closed if this is not the case)
• This issue can be reproduced without requiring a third party crate