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.
18 playbooks · 509 guides · 96 articles · 13 linked practice labs ·skip to practice
Fast pattern recognition for the production failures engineers see most often.
18 playbooks
Debugging Env Var Issues
A concise checklist for incidents where local works but CI, staging, or production changes behavior.
Debugging Cache Stampedes
How to recognize and contain request spikes when cached data expires.
Debugging CORS Origin Bugs
A practical way to inspect origin parsing, credentials, and header behavior.
Debugging Retry Bugs
Retry issues often hide the first failure and create duplicate work.
Debugging Timezone Bugs
Time bugs usually live at day boundaries, DST changes, and unit conversions.
Debugging Pagination Bugs
Pagination bugs hide in boundary math, cursor reuse, and new records arriving between pages.
Structured investigations for the failure modes engineers meet in real systems.
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.
Android ANR (Application Not Responding) Debugging: From Input Dispatch to Watchdog Timeouts
A field guide for Android engineers on diagnosing and fixing Application Not Responding (ANR) errors, covering input dispatch, broadcast receivers, and service timeouts.
Debugging Excessive Recomposition in Jetpack Compose
A deep dive into identifying and fixing unnecessary recompositions in Jetpack Compose, covering state hoisting, stable types, and common anti-patterns.
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.
SwiftUI View Not Updating When State Changes: A Field Guide
Your SwiftUI view stays stuck even though @State or @Published values change. This guide covers the real reasons—wrong view identity, unnecessary equatable conformance, and publishers on background queues—and how to fix them.
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.
The Debugging Mindset: A Systematic Method for Finding Root Causes
A repeatable, hypothesis-driven approach to debugging that works for intermittent failures, performance regressions, and production incidents.
Analyzing a Core Dump: What to Do When Your Process Goes Silent
A core dump is your process's last scream. Here's how to make it talk.
Timeouts Every Engineer Gets Wrong (and How to Fix Them)
Most timeout bugs aren't logic errors — they're configuration failures. Here's how to stop treating timeouts as magic numbers and start engineering them deliberately.
Backpressure in Streaming Systems: When Your Pipeline Fights Back
Backpressure is the system's way of saying 'slow down.' Ignore it and you get OOM crashes, silent data loss, or cascading failures. Here's how to design for it.
Finding Memory Leaks Step by Step: A Systematic Approach
Memory leaks are the silent killers of long-running services. Here's a repeatable process to hunt them down, from heap dumps to production monitoring.
Spacemail Is Down: What the August 2026 Outage Teaches About Provider Failures
A concise status snapshot of the current Spacemail incident, followed by a practical engineering guide to provider-wide outages, regional failover, degraded modes, and safe recovery.