ethereum/solidity v0.4.18

Version 0.4.18

on GitHub

This release adds further backwards-incompatible security measures enabled via pragma experimental "v0.5.0"; and contains another important feature: You can now select to compile only certain contracts using the outputSelection field of the standard-json-io compiler interface, which should speed up tools like truffle tremendously.

There are also two important bug fixes: One was an oversight in the way bytes variables are allocated in memory and can reduce the memory requirements 32-fold. The second is a security fix: In extremely specific circumstances, it can happen that a regular function is called instead of the fallback function for an Ether transfer without data. These circumstances are: The function has to have a zero signature (one out of 4294967296), it has to be payable, the contract cannot have more than five (external) functions and it cannot have a fallback function.

Features:

• Code Generator: Always use all available gas for calls as experimental 0.5.0 feature
  (previously, some amount was retained in order to work in pre-Tangerine-Whistle
  EVM versions)
• Parser: Better error message for unexpected trailing comma in parameter lists.
• Standard JSON: Support the outputSelection field for selective compilation of supplied sources.
• Syntax Checker: Unary + is now a syntax error as experimental 0.5.0 feature.
• Type Checker: Disallow non-pure constant state variables as experimental 0.5.0 feature.
• Type Checker: Do not add members of address to contracts as experimental 0.5.0 feature.
• Type Checker: Force interface functions to be external as experimental 0.5.0 feature.
• Type Checker: Require storage or memory keyword for local variables as experimental 0.5.0 feature.

Bugfixes:

• Code Generator: Allocate one byte per memory byte array element instead of 32.
• Code Generator: Do not accept data with less than four bytes (truncated function
  signature) for regular function calls - fallback function is invoked instead.
• Optimizer: Remove unused stack computation results.
• Parser: Fix source location of VariableDeclarationStatement.
• Type Checker: Allow gas in view functions.
• Type Checker: Do not mark event parameters as shadowing state variables.
• Type Checker: Prevent duplicate event declarations.
• Type Checker: Properly check array length and don't rely on an assertion in code generation.
• Type Checker: Properly support overwriting members inherited from address in a contract
  (such as balance, transfer, etc.)
• Type Checker: Validate each number literal in tuple expressions even if they are not assigned from.

We especially thank all our open source community contributors:

benjaminion, bernard peh, Boris Kostenko, Dave Hoover, David Au, Federico Bond, Gianfranco Cecconi, Giovanni Casinelli, Ilya Drabenia, Martín Triay, Rhett Aultman, Sergiusz Bazanski, wadeAlexC, Walter Weinmann and Zetherz.

If you want to perform a source build, please only use solidity_0.4.18.tar.gz and not the zip provided by github directly.