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Merge pull request #13913 from ethereum/changelog-v0.8.18

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Sort changelog for 0.8.18 alphabetically
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31
Changelog.md
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### 0.8.18 (unreleased)
### 0.8.18 (2023-02-01)
Language Features:
* Allow named parameters in mapping types.
Compiler Features:
* Commandline Interface: Add ``--no-cbor-metadata`` that skips CBOR metadata from getting appended at the end of the bytecode.
* Commandline Interface: Return exit code ``2`` on uncaught exceptions.
* Commandline Interface: Add `--no-cbor-metadata` that skips CBOR metadata from getting appended at the end of the bytecode.
* EVM: Deprecate ``block.difficulty`` and disallow ``difficulty()`` in inline assembly for EVM versions >= paris. The change is due to the renaming introduced by [EIP-4399](https://eips.ethereum.org/EIPS/eip-4399).
* EVM: Introduce ``block.prevrandao`` in Solidity and ``prevrandao()`` in inline assembly for EVM versions >= paris.
* EVM: Set the default EVM version to "Paris".
* EVM: Support for the EVM version "Paris".
* Language Server: Add basic document hover support.
* Natspec: Add event Natspec inheritance for devdoc.
* Standard JSON: Add a boolean field `settings.metadata.appendCBOR` that skips CBOR metadata from getting appended at the end of the bytecode.
* Optimizer: Added optimization rule ``and(shl(X, Y), shl(X, Z)) => shl(X, and(Y, Z))``.
* Parser: More detailed error messages about invalid version pragmas.
* SMTChecker: Make ``z3`` the default solver for the BMC and CHC engines instead of all solvers.
* SMTChecker: Support Eldarica as a Horn solver for the CHC engine when using the CLI option ``--model-checker-solvers eld``. The binary ``eld`` must be available in the system.
* Solidity Upgrade Tool: Remove ``solidity-upgrade`` tool.
* Standard JSON: Add a boolean field ``settings.metadata.appendCBOR`` that skips CBOR metadata from getting appended at the end of the bytecode.
* TypeChecker: Warn when using deprecated builtin ``selfdestruct``.
* Yul EVM Code Transform: Generate more optimal code for user-defined functions that always terminate a transaction. No return labels will be pushed for calls to functions that always terminate.
* Yul Optimizer: Allow replacing the previously hard-coded cleanup sequence by specifying custom steps after a colon delimiter (``:``) in the sequence string.
* Yul Optimizer: Eliminate ``keccak256`` calls if the value was already calculated by a previous call and can be reused.
* Language Server: Add basic document hover support.
* Optimizer: Added optimization rule ``and(shl(X, Y), shl(X, Z)) => shl(X, and(Y, Z))``.
* SMTChecker: Support Eldarica as a Horn solver for the CHC engine when using the CLI option ``--model-checker-solvers eld``. The binary `eld` must be available in the system.
* SMTChecker: Make ``z3`` the default solver for the BMC and CHC engines instead of all solvers.
* Parser: More detailed error messages about invalid version pragmas.
* Removed support for the ``solidity-upgrade`` tool.
* TypeChecker: Warn when using deprecated builtin ``selfdestruct``.
Bugfixes:
* Parser: Disallow several ``indexed`` attributes for the same event parameter.
* Parser: Disallow usage of the ``indexed`` attribute for modifier parameters.
* Yul Optimizer: Hash hex and decimal literals according to their value instead of their representation, improving the detection of equivalent functions.
* Solidity Upgrade Tool ``solidity-upgrade``: Fix the tool returning success code on uncaught exceptions.
* SMTChecker: Fix display error for negative integers that are one more than powers of two.
* SMTChecker: Improved readability for large integers that are powers of two or almost powers of two in error messages.
* SMTChecker: Fix internal error when a public library function is called internally.
* SMTChecker: Fix internal error on multiple wrong SMTChecker natspec entries.
* SMTChecker: Fix internal error on chain assignments using static fully specified state variables.
* SMTChecker: Fix internal error when using user defined types as mapping indices or struct members.
* SMTChecker: Fix internal error on multiple wrong SMTChecker natspec entries.
* SMTChecker: Fix internal error when a public library function is called internally.
* SMTChecker: Fix internal error when deleting struct member of function type.
* SMTChecker: Fix internal error when using user-defined types as mapping indices or struct members.
* SMTChecker: Improved readability for large integers that are powers of two or almost powers of two in error messages.
* TypeChecker: Fix bug where private library functions could be attached with ``using for`` outside of their declaration scope.
* Yul Optimizer: Hash hex and decimal literals according to their value instead of their representation, improving the detection of equivalent functions.
### 0.8.17 (2022-09-08)

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docs/bugs_by_version.json
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@ -1772,6 +1772,10 @@
"bugs": [],
"released": "2022-09-08"
},
"0.8.18": {
"bugs": [],
"released": "2023-02-01"
},
"0.8.2": {
"bugs": [
"AbiReencodingHeadOverflowWithStaticArrayCleanup",