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## Release notes

### Boost 1.67

- Maintenance fixes.

### Boost 1.66

- Boost.PolyCollection has been backported to GCC 4.8 to 4.9 and Clang 3.3 to 3.6. The version of libstdc++-v3 shipped with GCC 4.8 (which can also be used by Clang) has deficiencies that result in the following limitations when using Boost.PolyCollection:
  - Stateful allocators are not properly supported.
  - Allocator-extended move construction decays to allocator-extended copy construction.
  - Copy construction crashes if an exception is thrown during element copying.
- Maintenance fixes.

### Boost 1.65

- Initial release.