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You can use C-Reduce for any language (bernsteinbear.com)

472 points by Tomte · 617 days ago · 113 comments on HN

Article summary

C-Reduce is a tool originally designed to minimize C compiler bug reproducers, but it can be used for any language. It works by cutting down a file to the smallest possible size while still reproducing the bug. The tool requires a deterministic condition, a reasonably quick reproducer, and one or more mutable source files. It can be used with a script to automate the process of finding the smallest possible code that reproduces a bug.

Main themes

  • C-Reduce tool
  • Bug reproduction
  • Code minimization
  • Language agnosticism
  • Debugging techniques

What commenters say

  • C-Reduce can be a valuable tool for debugging and bug reproduction, even for languages other than C.
  • The effectiveness of git bisect is debated, with some finding it extremely useful and others considering it less so.
  • Automated tools like C-Reduce and git bisect can save time and effort in debugging, but may not always be necessary or useful.
  • The usefulness of git bisect depends on the specific use case and the size and complexity of the codebase.
  • Some developers have found git bisect to be a lifesaver in certain situations, such as debugging large and complex codebases.
  • There are concerns about the safety of using C-Reduce, particularly with regards to the potential for it to execute mutated versions of input scripts.
  • C-Reduce's ability to work with languages other than C is not immediately obvious and requires explanation.
  • The tool's heuristic passes may not always produce safe or desirable results, and caution is advised when using it.