Buglyst Blog
Learn to debug under pressure.
Playbooks for fast pattern recognition, guides for the full investigation, and articles for the engineering judgment around the edges.
17 playbooks · 509 guides · 95 articles · 12 linked practice labs ·skip to practice
Fast pattern recognition for the production failures engineers see most often.
1 playbook in Languages & Runtime
Structured investigations for the failure modes engineers meet in real systems.
Elixir GenServer call timeout: How to find and fix the real cause
A hands-on guide for debugging Elixir GenServer call timeouts: from symptoms and root causes to specific fixes and verification steps, with a real incident walkthrough.
Elixir Process Mailbox Overflow: How to Diagnose and Fix Unbounded Message Accumulation
Diagnose and fix Elixir process mailbox growth that causes memory pressure, latency spikes, and crashes. Covers OTP mailbox internals, redbug, recon, and practical fixes.
Kotlin Coroutine Not Cancelling: Debugging Stuck Jobs
A practical guide to debugging Kotlin coroutines that ignore cancellation, covering common pitfalls like blocking calls, uncooperative suspend functions, and improper scope management.
Null Pointer from Kotlin Platform Types in Java Interop
A guide to debugging NullPointerException from platform types when calling Java code from Kotlin. Covers root causes, diagnosis, and fixes.
Swift Retain Cycles in Closures: How to Find and Fix Them
A guide to diagnosing, fixing, and preventing retain cycles caused by closures in Swift, with real-world debugging steps and a detailed incident story.
Swift Actor Data Race Concurrency Debugging: Real-World Race Conditions in Actors
A practical guide to debugging data races in Swift actors, covering reentrancy, priority inversion, and actor-isolated state corruption with real crash logs and diagnostic steps.
Long-form thinking on debugging habits, observability, and the systems around the bug.