Adobe ColdFusion 2025 Bug: getBaseTagData() Doesn't Work Inside Closure

This article details a bug discovered in Adobe ColdFusion 2025 where the getBaseTagData() function does not work when called from within a closure, such as an IIFE or iterator methods like .map() and .filter(). The author demonstrates the issue with a custom tag example, showing that the function throws an error inside the closure while working fine in the main control flow. The bug also affects getBaseTagList(), which fails to list the custom tag in the hierarchy. The article notes that this works correctly in Lucee CFML 6, providing a technical comparison. It is relevant to IT/technology as it covers a software bug in a programming language and framework.