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wtf is dustmite?

kassane/dustmite — explained in plain English

Analysis updated 2026-07-18 · repo last pushed 2024-04-15

DAudience · developerComplexity · 2/5DormantSetup · moderate

TL;DR

A tool that automatically shrinks a buggy file or project down to the smallest snippet that still triggers the same bug, so developers can report it easily.

Mindmap

mindmap
  root((repo))
    What it does
      Shrinks files
      Keeps bug behavior
      Automates trial and error
    Tech stack
      D language
    Use cases
      Minimize compiler bugs
      Create bug reports
      Trim huge codebases
    Audience
      D programmers
      Compiler developers
    How it works
      Deletes chunks
      Tests behavior
      Repeats until minimal

Code map

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Why would anyone build with this?

REASON 1

Shrink a huge codebase down to a tiny snippet that still reproduces a compiler bug.

REASON 2

Create a minimal reproducible example to attach to a bug report.

REASON 3

Automatically trim unrelated code so only the bug-triggering part remains.

What's in the stack?

D

How it stacks up

kassane/dustmitekassane/stdcppkassane/tinyd-rt
LanguageDDD
Last pushed2024-04-152024-09-182024-07-30
MaintenanceDormantStaleStale
Setup difficultymoderatemoderatehard
Complexity2/53/54/5
Audiencedeveloperdeveloperdeveloper

Figures from each repo's GitHub metadata at analysis time.

How do you spin it up?

Difficulty · moderate Time to first run · 30min

Requires a working D compiler and a test script that detects the target bug behavior.

Wtf does this do

DustMite is a tool that shrinks large files down to their smallest possible version while keeping a specific behavior intact. Its main use is in programming: when someone discovers a bug in a compiler, they often need to provide a "minimal reproducible example" to report it. Instead of manually picking through thousands of lines of code to find the exact cause, a developer can point this tool at their program and let it automatically trim away everything that doesn't matter. The way it works is essentially smart trial and error. You give it your large file or project and tell it what behavior to look for, for example, a specific error message or a crash. The tool then starts deleting chunks of data, testing after each removal to see if the target behavior still happens. If the bug disappears, it puts that chunk back and tries removing something else. By repeating this process over and over, it gradually whittles the file down to a tiny core that still triggers the exact same problem. The primary audience is programmers who work with the D programming language, since that is what it was built for and where it is most commonly used. However, the README describes it as "general-purpose," meaning the same approach could theoretically apply to other types of data. The concrete use case is straightforward: a developer hits a compiler bug in a massive codebase, runs it through this tool, and gets back a 10-line snippet they can paste into a bug report. That saves hours of tedious manual investigation and makes life much easier for whoever has to fix the bug. The project was created by Vladimir Panteleev and is written in D itself. Beyond what is described above, the README is sparse on technical detail and points readers to a separate wiki on GitHub for full documentation.

Yoink these prompts

Prompt 1
Show me how to use DustMite to reduce a D source file to a minimal example that still crashes the compiler.
Prompt 2
Explain how DustMite's reduction algorithm decides what code to delete and what to keep.
Prompt 3
Write a test script I can pass to DustMite that checks for a specific error message so it knows when to stop reducing.

Frequently asked questions

wtf is dustmite?

A tool that automatically shrinks a buggy file or project down to the smallest snippet that still triggers the same bug, so developers can report it easily.

What language is dustmite written in?

Mainly D. The stack also includes D.

Is dustmite actively maintained?

Dormant — no commits in 2+ years (last push 2024-04-15).

How hard is dustmite to set up?

Setup difficulty is rated moderate, with roughly 30min to a first successful run.

Who is dustmite for?

Mainly developer.

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