Solidity Version 0.8.35

Release notes

We are excited to announce the release of the Solidity Compiler v0.8.35!

Changelog

Language Features:

• General: Add a builtin that computes the base slot of a storage namespace using the erc7201 formula from ERC-7201.

• Name Resolver: Warn about identifiers selected for future promotion to Solidity or Yul keywords (at, error, layout, leave, super, transient, this).

• Yul Analyzer: Warn about identifiers selected for future promotion to Yul keywords and reserved identifiers (basefee, blobbasefee, blobhash, clz, leave, memoryguard, mcopy, prevrandao, tload, tstore).

Compiler Features:

• Commandline Interface: Disallow selecting the deprecated assembly input mode that was only accessible via --assemble instead of treating it as equivalent to --strict-assembly.

• Commandline Interface: Introduce --experimental flag required for enabling the experimental mode.

• Commandline Interface: Replace the experimental --ethdebug and --ethdebug-runtime outputs with the more granular --ethdebug-resources, --ethdebug-compilation, --ethdebug-program and --ethdebug-program-runtime. Producing ethdebug/format/info/resources no longer forces full binary compilation.

• EVM: Introduce experimental EVM version @future.

• General: Improve performance of sanity checks throughout the compiler implementation.

• General: Introduce the SSA CFG codegen (experimental).

• General: Restrict the existing experimental features (generic-solidity, lsp, ethdebug, eof, evm, ast-import, evmasm-import, ir-ast, ssa-cfg) to experimental mode.

• Metadata: Store the state of the experimental mode in JSON and CBOR metadata. In CBOR this broadens the meaning of the existing experimental field, which used to indicate only the presence of certain experimental pragmas in the source.

• Standard JSON Interface: Introduce settings.experimental setting required for enabling the experimental mode.

• Standard JSON Interface: Replace the experimental top-level ethdebug output with ethdebug.resources and ethdebug.compilation. Decouple ethdebug outputs from binary compilation so that requesting the ethdebug/format/info/resources schema artifacts does not trigger bytecode generation.

• Yul Optimizer: Improve performance of control flow side effects collector and function references resolver.

Bugfixes:

• Yul: Fix incorrect serialization of Yul object names containing double quotes and escape sequences, producing output that could not be parsed as valid Yul.

• Yul EVM Code Transform: Improve stack shuffler performance by fixing a BFS deduplication issue.

• Yul IR Code Generation: Preserve custom error argument of require when stripping of revert strings is selected via --revert-strings strip.

We would especially like to thank all the contributors that made this release possible:

Francisco Giordano, Haowei Hsu, Kamil Śliwak, Masashi Takahashi, Mate Soos, Nikola Matić, Olexandr88, Weixie Cui, blishko, clonker, dxo, jstcz, matheusaaguiar, r0qs, rodiazet