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Recovering from Frozen Images in Squeak


When developing complex systems, encountering errors that leave your project in a frozen state can bring much sadness and consternation. For developers working with Squeak/Smalltalk, a frozen image…

A recent discussion in the Squeak community highlighted how one such incident, caused by a stuck semaphore during an image load, turned into an opportunity for both recovery and valuable practices in safeguarding against future mishaps. Whether using DoItFirst to inject custom code during startup or interacting with the VM through a debugger to manually resolve issues with semaphores, there are a variety of ways to recover from errors and get back on track. In conclusion, while Squeak’s development environment offers tools to recover from serious errors, the most effective defense is good preventive practice: maintain regular backups, version your work consistently, and always be mindful of the unexpected.

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