seniorKotlin

What are Kotlin memory leaks in coroutines and how do they occur?

Updated May 16, 2026

Short answer

Coroutine leaks occur when scopes are not cancelled or long-lived references are retained.

Deep explanation

Memory leaks in coroutines happen when a coroutine continues execution after its lifecycle should have ended. This often occurs due to GlobalScope usage, un-cancelled jobs, or capturing references like Activities in lambdas. Structured concurrency prevents this by binding coroutines to lifecycle scopes.

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