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.
17 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.
PHP Fatal Error: Uncaught Exception – What It Means and How to Fix It
A PHP Fatal Error: Uncaught Exception crashes your script. This guide explains the causes, how to find the culprit, and how to prevent it.
Laravel Queue Worker Stops Processing Jobs Without Errors
A guide to diagnosing why a Laravel queue worker appears running but never processes jobs, covering timeout, memory, supervisor, and database locks.
Laravel Artisan Command Error: Debugging Common Failures
A focused guide to diagnosing and fixing Laravel Artisan command errors, covering environment issues, memory limits, and missing dependencies.
Cannot Borrow Error: Practical Fixes for Real Code
A hands-on guide to diagnosing and fixing Rust borrow checker errors involving 'cannot borrow' messages, with real-world scenarios and code examples.
Rust Lifetime Error: Does Not Live Long Enough
A guide to debugging Rust's 'does not live long enough' error, covering obscure causes and real-world fixes.
Debugging Rust Async Tokio Runtime Errors: Blocked Tasks and Missing Wakers
When your Tokio-based async application hangs, panics with 'block_on' or 'spawn' failures, or tasks never complete, this guide walks you through diagnosing and fixing runtime errors.
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.