Issue #11438 has been updated by hsbt (Hiroshi SHIBATA). https://github.com/ruby/ruby/pull/18054 ---------------------------------------- Bug #11438: native_thread_init_stack() get machine.stack_start unequal to thread's stack start address, x86 win32 https://bugs.ruby-lang.org/issues/11438#change-118198 * Author: rickerliang (l ly) * Status: Assigned * Assignee: windows * ruby -v: 2.2.2 * Backport: 2.0.0: UNKNOWN, 2.1: UNKNOWN, 2.2: UNKNOWN ---------------------------------------- In function native_thread_init_stack() use VirtualQuery to get thread's stack start address.But some situation(ruby embbed in other application and initial it on the fly),native_thread_init_stack() will be called at low stack address and VirtualQuery return memory info BaseAddress + RegionSize < thread stack base(teb.StackBase). In this situation,subsequently call stack_check() at high stack address will cause stack_overflow exception,because esp > machine.stack_start: (teb.StackLimit < machine.stack_start < esp < teb.StackBase) but actually it is not stack overflow at this time. Use teb.StackBase instead of VirtualQuery get thread stack base is a more reliable solution. -- https://bugs.ruby-lang.org/