The article explores an obscure C programming language quirk involving pointer arithmetic and array indexing with negative values. It demonstrates how code like '&((int*)-8)[3]' is syntactically valid in C but leads to undefined behavior, potentially causing crashes or security vulnerabilities. The technical deep dive provides valuable insights for C developers about potential pitfalls in pointer manipulation.
Background
C programming language allows direct memory manipulation through pointers, which can lead to powerful but dangerous code constructs. Understanding undefined behavior is crucial for writing secure and reliable C programs.
- Source
- Lobsters
- Published
- Jun 7, 2026 at 02:56 AM
- Score
- 6.0 / 10