[C++ Patch] PR 50861

[Paolo Carlini]

Hi,

this fixes an ICE on invalid new in mainline. Tested x86_64-linux.

Ok?

Thanks,
Paolo.

////////////////////

/cp
2011-10-25  Paolo Carlini  <paolo.carl...@oracle.com>

        PR c++/50861
        * pt.c (tsubst_copy_and_build): Check return value of
        tsubst_copy_and_build for error_mark_node.

/testsuite
2011-10-25  Paolo Carlini  <paolo.carl...@oracle.com>

        PR c++/50861
        * g++.dg/template/crash108.C: New.

Index: testsuite/g++.dg/template/crash108.C
===================================================================
--- testsuite/g++.dg/template/crash108.C        (revision 0)
+++ testsuite/g++.dg/template/crash108.C        (revision 0)
@@ -0,0 +1,5 @@
+// PR c++/50861
+
+template<class T> struct A {A(int b=k(0));}; // { dg-error "arguments" }
+void f(int k){A<int> a;} // // { dg-error "parameter|declared" }
+// { dg-message "note" { target *-*-* } 3 }
Index: cp/pt.c
===================================================================
--- cp/pt.c     (revision 180424)
+++ cp/pt.c     (working copy)
@@ -13511,6 +13511,9 @@ tsubst_copy_and_build (tree t,
                tree unq = (tsubst_copy_and_build
                            (function, args, complain, in_decl, true,
                             integral_constant_expression_p));
+               if (unq == error_mark_node)
+                 return error_mark_node;
+
                if (unq != function)
                  {
                    tree fn = unq;