libstdc++: Fix std::span test failures with _GLIBCXX_ASSERTIONS

This fixes several failures with -D_GLIBCXX_ASSERTIONS added to the
testsuite flags, such as:

FAIL: 23_containers/span/back_assert_neg.cc (test for excess errors)

	* testsuite/23_containers/span/back_assert_neg.cc: Add #undef before
	defining _GLIBCXX_ASSERTIONS.
	* testsuite/23_containers/span/first_2_assert_neg.cc: Likewise.
	* testsuite/23_containers/span/first_assert_neg.cc: Likewise.
	* testsuite/23_containers/span/front_assert_neg.cc: Likewise.
	* testsuite/23_containers/span/index_op_assert_neg.cc: Likewise.
	* testsuite/23_containers/span/last_2_assert_neg.cc: Likewise.
	* testsuite/23_containers/span/last_assert_neg.cc: Likewise.
	* testsuite/23_containers/span/subspan_2_assert_neg.cc: Likewise.
	* testsuite/23_containers/span/subspan_3_assert_neg.cc: Likewise.
	* testsuite/23_containers/span/subspan_4_assert_neg.cc: Likewise.
	* testsuite/23_containers/span/subspan_5_assert_neg.cc: Likewise.
	* testsuite/23_containers/span/subspan_6_assert_neg.cc: Likewise.
	* testsuite/23_containers/span/subspan_assert_neg.cc: Likewise.

14 files changed, 28 insertions, 0 deletions

diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog
index 53fc59c..05d6748 100644
--- a/libstdc++-v3/ChangeLog
+++ b/libstdc++-v3/ChangeLog
@@ -1,5 +1,20 @@
 2020-02-27  Jonathan Wakely  <jwakely@redhat.com>
 
+	* testsuite/23_containers/span/back_assert_neg.cc: Add #undef before
+	defining _GLIBCXX_ASSERTIONS.
+	* testsuite/23_containers/span/first_2_assert_neg.cc: Likewise.
+	* testsuite/23_containers/span/first_assert_neg.cc: Likewise.
+	* testsuite/23_containers/span/front_assert_neg.cc: Likewise.
+	* testsuite/23_containers/span/index_op_assert_neg.cc: Likewise.
+	* testsuite/23_containers/span/last_2_assert_neg.cc: Likewise.
+	* testsuite/23_containers/span/last_assert_neg.cc: Likewise.
+	* testsuite/23_containers/span/subspan_2_assert_neg.cc: Likewise.
+	* testsuite/23_containers/span/subspan_3_assert_neg.cc: Likewise.
+	* testsuite/23_containers/span/subspan_4_assert_neg.cc: Likewise.
+	* testsuite/23_containers/span/subspan_5_assert_neg.cc: Likewise.
+	* testsuite/23_containers/span/subspan_6_assert_neg.cc: Likewise.
+	* testsuite/23_containers/span/subspan_assert_neg.cc: Likewise.
+
 	* include/debug/string (__gnu_debug::basic_string::insert): Fix for
 	C++98 where the member function of the base class returns void.
 
diff --git a/libstdc++-v3/testsuite/23_containers/span/back_assert_neg.cc b/libstdc++-v3/testsuite/23_containers/span/back_assert_neg.cc
index f3f2b20..76f2a7e 100644
--- a/libstdc++-v3/testsuite/23_containers/span/back_assert_neg.cc
+++ b/libstdc++-v3/testsuite/23_containers/span/back_assert_neg.cc
@@ -18,6 +18,7 @@
 // { dg-options "-std=gnu++2a" }
 // { dg-do run { xfail c++2a } }
 
+#undef _GLIBCXX_ASSERTIONS
 #define _GLIBCXX_ASSERTIONS
 #include <span>
 
diff --git a/libstdc++-v3/testsuite/23_containers/span/first_2_assert_neg.cc b/libstdc++-v3/testsuite/23_containers/span/first_2_assert_neg.cc
index 7b202bd..0019fca 100644
--- a/libstdc++-v3/testsuite/23_containers/span/first_2_assert_neg.cc
+++ b/libstdc++-v3/testsuite/23_containers/span/first_2_assert_neg.cc
@@ -18,6 +18,7 @@
 // { dg-options "-std=gnu++2a" }
 // { dg-do run { xfail c++2a } }
 
+#undef _GLIBCXX_ASSERTIONS
 #define _GLIBCXX_ASSERTIONS
 #include <span>
 
diff --git a/libstdc++-v3/testsuite/23_containers/span/first_assert_neg.cc b/libstdc++-v3/testsuite/23_containers/span/first_assert_neg.cc
index e10184e..7b93abc 100644
--- a/libstdc++-v3/testsuite/23_containers/span/first_assert_neg.cc
+++ b/libstdc++-v3/testsuite/23_containers/span/first_assert_neg.cc
@@ -18,6 +18,7 @@
 // { dg-options "-std=gnu++2a" }
 // { dg-do run { xfail c++2a } }
 
+#undef _GLIBCXX_ASSERTIONS
 #define _GLIBCXX_ASSERTIONS
 #include <span>
 
diff --git a/libstdc++-v3/testsuite/23_containers/span/front_assert_neg.cc b/libstdc++-v3/testsuite/23_containers/span/front_assert_neg.cc
index ea99c8b..62dec39 100644
--- a/libstdc++-v3/testsuite/23_containers/span/front_assert_neg.cc
+++ b/libstdc++-v3/testsuite/23_containers/span/front_assert_neg.cc
@@ -18,6 +18,7 @@
 // { dg-options "-std=gnu++2a" }
 // { dg-do run { xfail c++2a } }
 
+#undef _GLIBCXX_ASSERTIONS
 #define _GLIBCXX_ASSERTIONS
 #include <span>
 
diff --git a/libstdc++-v3/testsuite/23_containers/span/index_op_assert_neg.cc b/libstdc++-v3/testsuite/23_containers/span/index_op_assert_neg.cc
index 4676b7a..10432eb 100644
--- a/libstdc++-v3/testsuite/23_containers/span/index_op_assert_neg.cc
+++ b/libstdc++-v3/testsuite/23_containers/span/index_op_assert_neg.cc
@@ -18,6 +18,7 @@
 // { dg-options "-std=gnu++2a" }
 // { dg-do run { xfail c++2a } }
 
+#undef _GLIBCXX_ASSERTIONS
 #define _GLIBCXX_ASSERTIONS
 #include <span>
 
diff --git a/libstdc++-v3/testsuite/23_containers/span/last_2_assert_neg.cc b/libstdc++-v3/testsuite/23_containers/span/last_2_assert_neg.cc
index fca1ced..cc12c1f 100644
--- a/libstdc++-v3/testsuite/23_containers/span/last_2_assert_neg.cc
+++ b/libstdc++-v3/testsuite/23_containers/span/last_2_assert_neg.cc
@@ -18,6 +18,7 @@
 // { dg-options "-std=gnu++2a" }
 // { dg-do run { xfail c++2a } }
 
+#undef _GLIBCXX_ASSERTIONS
 #define _GLIBCXX_ASSERTIONS
 #include <span>
 
diff --git a/libstdc++-v3/testsuite/23_containers/span/last_assert_neg.cc b/libstdc++-v3/testsuite/23_containers/span/last_assert_neg.cc
index f831c72..773bea4 100644
--- a/libstdc++-v3/testsuite/23_containers/span/last_assert_neg.cc
+++ b/libstdc++-v3/testsuite/23_containers/span/last_assert_neg.cc
@@ -18,6 +18,7 @@
 // { dg-options "-std=gnu++2a" }
 // { dg-do run { xfail c++2a } }
 
+#undef _GLIBCXX_ASSERTIONS
 #define _GLIBCXX_ASSERTIONS
 #include <span>
 
diff --git a/libstdc++-v3/testsuite/23_containers/span/subspan_2_assert_neg.cc b/libstdc++-v3/testsuite/23_containers/span/subspan_2_assert_neg.cc
index 00a9400..a3b856e 100644
--- a/libstdc++-v3/testsuite/23_containers/span/subspan_2_assert_neg.cc
+++ b/libstdc++-v3/testsuite/23_containers/span/subspan_2_assert_neg.cc
@@ -18,6 +18,7 @@
 // { dg-options "-std=gnu++2a" }
 // { dg-do run { xfail c++2a } }
 
+#undef _GLIBCXX_ASSERTIONS
 #define _GLIBCXX_ASSERTIONS
 #include <span>
 
diff --git a/libstdc++-v3/testsuite/23_containers/span/subspan_3_assert_neg.cc b/libstdc++-v3/testsuite/23_containers/span/subspan_3_assert_neg.cc
index c8a5c92..2c55942 100644
--- a/libstdc++-v3/testsuite/23_containers/span/subspan_3_assert_neg.cc
+++ b/libstdc++-v3/testsuite/23_containers/span/subspan_3_assert_neg.cc
@@ -18,6 +18,7 @@
 // { dg-options "-std=gnu++2a" }
 // { dg-do run { xfail c++2a } }
 
+#undef _GLIBCXX_ASSERTIONS
 #define _GLIBCXX_ASSERTIONS
 #include <span>
 
diff --git a/libstdc++-v3/testsuite/23_containers/span/subspan_4_assert_neg.cc b/libstdc++-v3/testsuite/23_containers/span/subspan_4_assert_neg.cc
index 1ccd5f2..8a08263 100644
--- a/libstdc++-v3/testsuite/23_containers/span/subspan_4_assert_neg.cc
+++ b/libstdc++-v3/testsuite/23_containers/span/subspan_4_assert_neg.cc
@@ -18,6 +18,7 @@
 // { dg-options "-std=gnu++2a" }
 // { dg-do run { xfail c++2a } }
 
+#undef _GLIBCXX_ASSERTIONS
 #define _GLIBCXX_ASSERTIONS
 #include <span>
 
diff --git a/libstdc++-v3/testsuite/23_containers/span/subspan_5_assert_neg.cc b/libstdc++-v3/testsuite/23_containers/span/subspan_5_assert_neg.cc
index 685096d..c383647 100644
--- a/libstdc++-v3/testsuite/23_containers/span/subspan_5_assert_neg.cc
+++ b/libstdc++-v3/testsuite/23_containers/span/subspan_5_assert_neg.cc
@@ -18,6 +18,7 @@
 // { dg-options "-std=gnu++2a" }
 // { dg-do run { xfail c++2a } }
 
+#undef _GLIBCXX_ASSERTIONS
 #define _GLIBCXX_ASSERTIONS
 #include <span>
 
diff --git a/libstdc++-v3/testsuite/23_containers/span/subspan_6_assert_neg.cc b/libstdc++-v3/testsuite/23_containers/span/subspan_6_assert_neg.cc
index 2752aa2..a58d763 100644
--- a/libstdc++-v3/testsuite/23_containers/span/subspan_6_assert_neg.cc
+++ b/libstdc++-v3/testsuite/23_containers/span/subspan_6_assert_neg.cc
@@ -18,6 +18,7 @@
 // { dg-options "-std=gnu++2a" }
 // { dg-do run { xfail c++2a } }
 
+#undef _GLIBCXX_ASSERTIONS
 #define _GLIBCXX_ASSERTIONS
 #include <span>
 
diff --git a/libstdc++-v3/testsuite/23_containers/span/subspan_assert_neg.cc b/libstdc++-v3/testsuite/23_containers/span/subspan_assert_neg.cc
index 56a91ab..9160489 100644
--- a/libstdc++-v3/testsuite/23_containers/span/subspan_assert_neg.cc
+++ b/libstdc++-v3/testsuite/23_containers/span/subspan_assert_neg.cc
@@ -18,6 +18,7 @@
 // { dg-options "-std=gnu++2a" }
 // { dg-do run { xfail c++2a } }
 
+#undef _GLIBCXX_ASSERTIONS
 #define _GLIBCXX_ASSERTIONS
 #include <span>