https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106623
--- Comment #2 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The releases/gcc-12 branch has been updated by Iain Buclaw <ibuc...@gcc.gnu.org>: https://gcc.gnu.org/g:dc230a0c690794cd45cc4065fa13303fd6cdfc40 commit r12-8688-gdc230a0c690794cd45cc4065fa13303fd6cdfc40 Author: Iain Buclaw <ibuc...@gdcproject.org> Date: Mon Aug 15 17:51:03 2022 +0200 d: Fix internal compiler error: Segmentation fault at gimple-expr.cc:88 Because complex types are deprecated in the language, the new way to expose native complex types is by defining an enum with a basetype of a library-defined struct that is implicitly treated as-if it is native. As casts are not implicitly added by the front-end when downcasting from enum to its underlying type, we must insert an explicit cast during the code generation pass. PR d/106623 gcc/d/ChangeLog: * d-codegen.cc (underlying_complex_expr): New function. (d_build_call): Handle passing native complex objects as the library-defined equivalent. * d-tree.h (underlying_complex_expr): Declare. * expr.cc (ExprVisitor::visit (DotVarExp *)): Call underlying_complex_expr instead of build_vconvert. gcc/testsuite/ChangeLog: * gdc.dg/torture/pr106623.d: New test. (cherry picked from commit e206fecaac29f559f4990312b875604eb1ce3ef3)