Issue #19482 has been reported by peterzhu2118 (Peter Zhu). ---------------------------------------- Bug #19482: Fix crash when allocating classes with newobj hook https://bugs.ruby-lang.org/issues/19482 * Author: peterzhu2118 (Peter Zhu) * Status: Open * Priority: Normal * Backport: 2.7: DONTNEED, 3.0: DONTNEED, 3.1: DONTNEED, 3.2: REQUIRED ---------------------------------------- GitHub PR: https://github.com/ruby/ruby/pull/7464 We need to zero out the whole slot when running the newobj hook for a newly allocated class because the slot could be filled with garbage, which would cause a crash if a GC runs inside of the newobj hook. For example, the following script crashes: ```ruby require "objspace" GC.stress = true ObjectSpace.trace_object_allocations { 100.times do Class.new end } ``` -- https://bugs.ruby-lang.org/