Hi all,
this patch try to fix PR c++/64948 (Lambda reference capture
initialization in template function creates segmentation fault).
2015-2-13 Andrea Azzarone <azzaro...@gmail.com>
PR c++/64948
* lambda.c (add_capture) Do not consider as rvalues all expressions
involving template parameters.
--
Andrea Azzarone
Index: gcc/cp/lambda.c
===================================================================
--- gcc/cp/lambda.c (revision 220454)
+++ gcc/cp/lambda.c (working copy)
@@ -506,7 +506,7 @@ add_capture (tree lambda, tree id, tree
if (by_reference_p)
{
type = build_reference_type (type);
- if (!real_lvalue_p (initializer))
+ if (TREE_TYPE (initializer) && !real_lvalue_p (initializer))
error ("cannot capture %qE by reference", initializer);
}
else
Index: gcc/testsuite/g++.dg/cpp1y/lambda-init13.C
===================================================================
--- gcc/testsuite/g++.dg/cpp1y/lambda-init13.C (revision 0)
+++ gcc/testsuite/g++.dg/cpp1y/lambda-init13.C (working copy)
@@ -0,0 +1,10 @@
+// PR c++/64948
+// { dg-do compile { target c++14 } }
+
+template <class T>
+void foo(T t) {
+ [&i = t.begin()]() {};
+}
+
+int main() {
+}
Index: gcc/testsuite/g++.dg/cpp1y/lambda-init14.C
===================================================================
--- gcc/testsuite/g++.dg/cpp1y/lambda-init14.C (revision 0)
+++ gcc/testsuite/g++.dg/cpp1y/lambda-init14.C (working copy)
@@ -0,0 +1,16 @@
+// PR c++/64948
+// { dg-do compile { target c++14 } }
+
+template <class T>
+void foo(T t) {
+ [&i = t.begin()]() {}; // { dg-error "invalid initialization" }
+}
+
+struct X {
+ int begin() { return 0; }
+};
+
+int main() {
+ X x;
+ foo(x);
+}
