This release adds support for calldata structs and packed encoding with ABIEncoderV2. We also introduced some changes to the C API and added support for continuous fuzzing via Google oss-fuzz. In addition to that, we added a new commandline option for improved (colorized) diagnostics formatting.

Language Features:

• Allow calldata structs without dynamically encoded members with ABIEncoderV2.

Compiler Features:

• ABIEncoderV2: Implement packed encoding.
• C API (libsolc / raw soljson.js): Introduce solidity_free method which releases all internal buffers to save memory.
• Commandline Interface: Adds new option --new-reporter for improved diagnostics formatting
  along with --color and --no-color for colorized output to be forced (or explicitly disabled).

Bugfixes:

• Code Generator: Defensively pad allocation of creationCode and runtimeCode to multiples of 32 bytes.
• Commandline Interface: Allow yul optimizer only for strict assembly.
• Parser: Disallow empty import statements.
• Type Checker: Disallow mappings with data locations other than storage.
• Type Checker: Fix internal error when a struct array index does not fit into a uint256.
• Type System: Properly report packed encoded size for arrays and structs (mostly unused until now).

Build System:

• Add support for continuous fuzzing via Google oss-fuzz
• SMT: If using Z3, require version 4.6.0 or newer.
• Soltest: Add parser that is used in the file-based unit test environment.
• Ubuntu PPA Packages: Use CVC4 as SMT solver instead of Z3

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

Alex Beregszaszi, Bhargava Shastry, Christian Reitwiessner, Christian Parpart, Chris Ward, Daniel Kirchner, Erik Kundt, Leo Arias, Leonardo Alt, Mathias Baumann, Mudit Gupta, Shelly Grossman