BUG Playground
BUG is a minimal smart contract language designed for demonstrating and testing the ethdebug format. It compiles to EVM bytecode and produces rich debug information.
Use the interactive playground below to explore how BUG code compiles to intermediate representations and EVM bytecode.
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About BUG
BUG is intentionally minimal—it provides just enough language features to demonstrate the debugging challenges that ethdebug addresses:
- Storage variables with automatic slot allocation
- Functions with parameters and return values
- Control flow (if/else, while loops)
- Basic types (uint256, bool, address, bytes32)
- Complex types (arrays, mappings, structs)
Compilation Views
The playground shows several stages of compilation:
- AST - The abstract syntax tree after parsing
- IR - The intermediate representation used for optimization
- CFG - The control flow graph visualizing program structure
- Bytecode - The final EVM bytecode with debug annotations
Hover over instructions in the IR or Bytecode views to highlight the corresponding source code.