React Native Android App Crashes Immediately on Open (Hermes / ProGuard)
An Android app that crashes the instant it opens, but only in release builds (never in debug), points strongly at ProGuard/R8 code shrinking removing or...
Blog
All troubleshooting articles, newest first.
React Native FlatList Sluggish Scroll Performance With Large Data
Sluggish FlatList scrolling with large datasets almost always comes down to a combination of unnecessary re-renders of list items and suboptimal windowing...
React Native iOS Build Failed "Podfile.lock Is Out of Date"
"Podfile.lock is out of date" means the currently installed CocoaPods dependencies don't match what your project's Podfile currently requires — almost always...
React Native Network Request Failed Only on Physical Android Device
A network request that works fine on an Android emulator but fails specifically on a physical device almost always comes down to how each environment reaches...
React Native Screen Flickering or Re-Rendering Infinitely in useEffect
An infinite re-render loop in a React Native screen almost always traces back to a useEffect whose dependency array contains a value that's recreated fresh on...
Gin "Response Writer Already Written" Error When Calling Next()
"Superfluous response.WriteHeader call" or similar already-written errors in Gin almost always mean a response was written more than once for the same request...
Gin Route Wildcard Param Collision With Static Subroutes
Gin's router panics at startup (not at request time) when it detects a conflict between a wildcard parameter route and a static route sharing an ambiguous path...
Go "Cannot Use X as Type Y in Assignment" Interface Mismatch
This compile-time error means a value doesn't actually satisfy the interface (or type) you're trying to assign it to — Go's static type checking catches this...
Go "Concurrent Map Read and Map Write" Fatal Error Crash
Go's built-in maps are explicitly not safe for concurrent use — reading and writing the same map from multiple goroutines simultaneously, without...