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12 changes: 12 additions & 0 deletions README.md
Original file line number Diff line number Diff line change
Expand Up @@ -55,6 +55,18 @@ fn main() {
}
```

# Supported Rust Versions

The `backtrace` crate is a core component of the standard library, and must
at times keep up with the evolution of various platforms in order to serve
the standard library's needs. This often means using recent libraries
that provide unwinding and symbolication for various platforms.
Thus `backtrace` is likely to use recent Rust features or depend on a library
which itself uses them. Its minimum supported Rust version, by policy, is
within a few versions of current stable, approximately "stable - 2".

This policy takes precedence over versions written anywhere else in this repo.

# License

This project is licensed under either of
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