React Native Navigation State Lost on App Reload
Losing navigation state on reload is expected default behavior in React Navigation — it doesn't persist state automatically, so if you need the user's position...
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Gin Binding JSON Returns Empty Struct
When Gin's JSON binding produces a struct with all fields at their zero values, despite the request clearly containing valid JSON, it's almost always due to a...
Gin Middleware Not Running in Expected Order
Gin middleware runs in the order it's registered, and confusion about execution order almost always comes down to either registration happening in a different...
Go Goroutine Leak, How to Detect and Fix
A goroutine leak happens when a goroutine gets stuck permanently — usually blocked waiting on a channel operation that will never complete — and never...
Go "Nil Pointer Dereference" Panic, How to Debug
A nil pointer dereference panic means your code tried to access a field or method on a pointer that was never actually assigned a valid value — Go's type...
Go "Undefined: Package" After Adding New File
When Go reports something as "undefined" right after you add a new file to an existing package, the new file's contents almost always aren't actually part of...
Postgres Backup and Restore With pg_dump, Common Errors
Most pg_dump and pg_restore failures come down to a small set of recurring causes — version mismatches between the tools and the server, missing permissions on...
Postgres "Database Is Being Accessed by Other Users" on Drop
PostgreSQL refuses to drop a database that has any active connections to it, as a safety measure — the error is expected behavior, not a bug, and the fix is...
PostgreSQL JSON Column Query Returning Null Unexpectedly
When a query against a JSON or JSONB column returns null even though the data clearly contains the key you're looking for, it's almost always because of the...