libstdc++: Update expected error for debug/constexpr*_neg.cc tests

We no longer hit a __builtin_unreachable() in these tests, so we need to
update the dg-error patterns to match _Error_formatter::_M_error().

We can also remove some dg-prune-output directives matching notes saying
"in 'constexpr' expansion" because that's done globally in prune.exp.

libstdc++-v3/ChangeLog:

	* testsuite/25_algorithms/copy/debug/constexpr_neg.cc: Adjust
	dg-error pattern.
	* testsuite/25_algorithms/copy_backward/debug/constexpr_neg.cc:
	Likewise.
	* testsuite/25_algorithms/equal/debug/constexpr_neg.cc:
	Likewise.
	* testsuite/25_algorithms/lower_bound/debug/constexpr_partitioned_neg.cc:
	Likewise.
	* testsuite/25_algorithms/lower_bound/debug/constexpr_partitioned_pred_neg.cc:
	Likewise.
	* testsuite/25_algorithms/lower_bound/debug/constexpr_valid_range_neg.cc:
	Likewise.
	* testsuite/25_algorithms/upper_bound/debug/constexpr_partitioned_neg.cc:
	Likewise.
	* testsuite/25_algorithms/upper_bound/debug/constexpr_partitioned_pred_neg.cc:
	Likewise.
	* testsuite/25_algorithms/upper_bound/debug/constexpr_valid_range_neg.cc:
	Likewise.

9 files changed, 9 insertions, 15 deletions

diff --git a/libstdc++-v3/testsuite/25_algorithms/copy/debug/constexpr_neg.cc b/libstdc++-v3/testsuite/25_algorithms/copy/debug/constexpr_neg.cc
index 2922d1a..6ae37b8 100644
--- a/libstdc++-v3/testsuite/25_algorithms/copy/debug/constexpr_neg.cc
+++ b/libstdc++-v3/testsuite/25_algorithms/copy/debug/constexpr_neg.cc
@@ -33,7 +33,7 @@ test1()
 }
 
 static_assert(test1()); // { dg-error "non-constant condition" }
-// { dg-error "builtin_unreachable" "" { target *-*-* } 0 }
+// { dg-error "_Error_formatter::_M_error()" "" { target *-*-* } 0 }
 
 constexpr bool
 test2()
diff --git a/libstdc++-v3/testsuite/25_algorithms/copy_backward/debug/constexpr_neg.cc b/libstdc++-v3/testsuite/25_algorithms/copy_backward/debug/constexpr_neg.cc
index 4b55b83..52259aa 100644
--- a/libstdc++-v3/testsuite/25_algorithms/copy_backward/debug/constexpr_neg.cc
+++ b/libstdc++-v3/testsuite/25_algorithms/copy_backward/debug/constexpr_neg.cc
@@ -35,5 +35,4 @@ test()
 
 static_assert(test()); // { dg-error "non-constant condition" }
 
-// { dg-prune-output "in 'constexpr' expansion" }
-// { dg-prune-output "builtin_unreachable" }
+// { dg-prune-output "_Error_formatter::_M_error()" }
diff --git a/libstdc++-v3/testsuite/25_algorithms/equal/debug/constexpr_neg.cc b/libstdc++-v3/testsuite/25_algorithms/equal/debug/constexpr_neg.cc
index 8fb225e..82ec49c 100644
--- a/libstdc++-v3/testsuite/25_algorithms/equal/debug/constexpr_neg.cc
+++ b/libstdc++-v3/testsuite/25_algorithms/equal/debug/constexpr_neg.cc
@@ -32,7 +32,7 @@ test01()
 }
 
 static_assert(test01()); // { dg-error "non-constant condition" }
-// { dg-error "builtin_unreachable" "" { target *-*-* } 0 }
+// { dg-error "_Error_formatter::_M_error()" "" { target *-*-* } 0 }
 
 constexpr bool
 test02()
diff --git a/libstdc++-v3/testsuite/25_algorithms/lower_bound/debug/constexpr_partitioned_neg.cc b/libstdc++-v3/testsuite/25_algorithms/lower_bound/debug/constexpr_partitioned_neg.cc
index 184ae22..8c2819d 100644
--- a/libstdc++-v3/testsuite/25_algorithms/lower_bound/debug/constexpr_partitioned_neg.cc
+++ b/libstdc++-v3/testsuite/25_algorithms/lower_bound/debug/constexpr_partitioned_neg.cc
@@ -43,5 +43,5 @@ test()
 
 static_assert(test()); // { dg-error "" }
 
-// { dg-prune-output "builtin_unreachable" }
+// { dg-prune-output "_Error_formatter::_M_error()" }
 // { dg-prune-output "in 'constexpr'" }
diff --git a/libstdc++-v3/testsuite/25_algorithms/lower_bound/debug/constexpr_partitioned_pred_neg.cc b/libstdc++-v3/testsuite/25_algorithms/lower_bound/debug/constexpr_partitioned_pred_neg.cc
index f7b2b72..ab27cb1 100644
--- a/libstdc++-v3/testsuite/25_algorithms/lower_bound/debug/constexpr_partitioned_pred_neg.cc
+++ b/libstdc++-v3/testsuite/25_algorithms/lower_bound/debug/constexpr_partitioned_pred_neg.cc
@@ -33,5 +33,4 @@ test()
 
 static_assert(test()); // { dg-error "" }
 
-// { dg-prune-output "builtin_unreachable" }
-// { dg-prune-output "in 'constexpr'" }
+// { dg-prune-output "_Error_formatter::_M_error()" }
diff --git a/libstdc++-v3/testsuite/25_algorithms/lower_bound/debug/constexpr_valid_range_neg.cc b/libstdc++-v3/testsuite/25_algorithms/lower_bound/debug/constexpr_valid_range_neg.cc
index 6996950..9fd3bcc 100644
--- a/libstdc++-v3/testsuite/25_algorithms/lower_bound/debug/constexpr_valid_range_neg.cc
+++ b/libstdc++-v3/testsuite/25_algorithms/lower_bound/debug/constexpr_valid_range_neg.cc
@@ -46,6 +46,5 @@ test2()
 
 static_assert(test2()); // { dg-error "" }
 
-// { dg-prune-output "builtin_unreachable" }
-// { dg-prune-output "in 'constexpr'" }
+// { dg-prune-output "_Error_formatter::_M_error()" }
 
diff --git a/libstdc++-v3/testsuite/25_algorithms/upper_bound/debug/constexpr_partitioned_neg.cc b/libstdc++-v3/testsuite/25_algorithms/upper_bound/debug/constexpr_partitioned_neg.cc
index b4e56df..c1ee761 100644
--- a/libstdc++-v3/testsuite/25_algorithms/upper_bound/debug/constexpr_partitioned_neg.cc
+++ b/libstdc++-v3/testsuite/25_algorithms/upper_bound/debug/constexpr_partitioned_neg.cc
@@ -43,5 +43,4 @@ test()
 
 static_assert(test()); // { dg-error "" }
 
-// { dg-prune-output "builtin_unreachable" }
-// { dg-prune-output "in 'constexpr'" }
+// { dg-prune-output "_Error_formatter::_M_error()" }
diff --git a/libstdc++-v3/testsuite/25_algorithms/upper_bound/debug/constexpr_partitioned_pred_neg.cc b/libstdc++-v3/testsuite/25_algorithms/upper_bound/debug/constexpr_partitioned_pred_neg.cc
index 1ffeb32..85fcde4 100644
--- a/libstdc++-v3/testsuite/25_algorithms/upper_bound/debug/constexpr_partitioned_pred_neg.cc
+++ b/libstdc++-v3/testsuite/25_algorithms/upper_bound/debug/constexpr_partitioned_pred_neg.cc
@@ -33,5 +33,4 @@ test()
 
 static_assert(test()); // { dg-error "" }
 
-// { dg-prune-output "builtin_unreachable" }
-// { dg-prune-output "in 'constexpr'" }
+// { dg-prune-output "_Error_formatter::_M_error()" }
diff --git a/libstdc++-v3/testsuite/25_algorithms/upper_bound/debug/constexpr_valid_range_neg.cc b/libstdc++-v3/testsuite/25_algorithms/upper_bound/debug/constexpr_valid_range_neg.cc
index 5b0e651..446073c 100644
--- a/libstdc++-v3/testsuite/25_algorithms/upper_bound/debug/constexpr_valid_range_neg.cc
+++ b/libstdc++-v3/testsuite/25_algorithms/upper_bound/debug/constexpr_valid_range_neg.cc
@@ -46,5 +46,4 @@ test2()
 
 static_assert(test2()); // { dg-error "" }
 
-// { dg-prune-output "builtin_unreachable" }
-// { dg-prune-output "in 'constexpr'" }
+// { dg-prune-output "_Error_formatter::_M_error()" }