Don't print the entire declaration of the alliassee when ->toChars() is

called on an `AliasDeclaration`; just printing the name will do. This fixes
#305, which otherwise tries to generate
{{{
  class E {
      void A() {
          alias /* recurse into E->toCBuffer() */ m;
      }
  }
}}}
by way of an infinite recursion (causing a segfault when the stack runs out).

dmd/declaration.c

@@ -575,7 +575,7 @@ void AliasDeclaration::toCBuffer(OutBuffer *buf, HdrGenState *hgs)
     {
 	if (haliassym)
 	{
-	    haliassym->toCBuffer(buf, hgs);
+	    buf->writestring(haliassym->toChars());
 	    buf->writeByte(' ');
 	    buf->writestring(ident->toChars());
 	}
@@ -587,7 +587,7 @@ void AliasDeclaration::toCBuffer(OutBuffer *buf, HdrGenState *hgs)
     {
 	if (aliassym)
 	{
-	    aliassym->toCBuffer(buf, hgs);
+	    buf->writestring(aliassym->toChars());
 	    buf->writeByte(' ');
 	    buf->writestring(ident->toChars());
 	}

gen/toir.cpp

@@ -1774,7 +1774,7 @@ DValue* AssertExp::toElem(IRState* p)
         condty->ty == Tclass &&
         !((TypeClass*)condty)->sym->isInterfaceDeclaration())
     {
-        Logger::print("calling class invariant");
+        Logger::println("calling class invariant");
         llvm::Function* fn = LLVM_D_GetRuntimeFunction(gIR->module, "_d_invariant");
         LLValue* arg = DtoBitCast(cond->getRVal(), fn->getFunctionType()->getParamType(0));
         gIR->CreateCallOrInvoke(fn, arg);

tests/mini/compile_bug305.d

@@ -0,0 +1,7 @@
+module bug305;
+
+class E {
+    void A() {
+        alias E m;
+    }
+}