With --enable-checking: source/dub/dub.d: In member function ‘getPackage’: source/dub/dub.d:725: internal compiler error: tree check: expected statement_list, have catch_expr in tsi_start, at tree-iterator.h:42 https://github.com/D-Programming-GDC/GDC/commit/3d820cdbf7c8e86e6067ed4ff522da2bba8908c7