http://d.puremagic.com/issues/show_bug.cgi?id=2899
Summary: Object.toString is not declared const Product: D Version: 2.029 Platform: PC OS/Version: Linux Status: NEW Severity: normal Priority: P2 Component: Phobos AssignedTo: bugzi...@digitalmars.com ReportedBy: somea...@yahoo.com I don't have a code snippets, but in dmd-v2.029/src/phobos/std/format.d:2054 else static if (is(const(D) : const Object)) { // @@@BUG 2367@@@ //if (obj is null) w.write("null"); if (obj is null) w.put("null"[]); else w.put(obj.toString); // 2054 } dmd/linux/bin/../bin/../../src/phobos/std/format.d(2054): Error: obj.toString can only be called on a mutable object, not const(...) This because Object.toString is not declared const. So how to fix this? --