1 files changed, 10 insertions, 0 deletions
diff --git a/gcc/testsuite/g++.dg/DRs/dr2578.C b/gcc/testsuite/g++.dg/DRs/dr2578.C
new file mode 100644
index 0000000..0dce23b
--- /dev/null
+++ b/gcc/testsuite/g++.dg/DRs/dr2578.C
@@ -0,0 +1,10 @@
+// DR 2578 - Undefined behavior when creating an invalid string literal via stringizing
+// { dg-do preprocess }
+// { dg-options "-pedantic-errors" }
+
+#define A(a) #a
+#define B(a) A(a)
+#define C \\
+
+const char *x = B(C);	// { dg-warning "invalid string literal, ignoring final '\\\\'" "" { target c++23_down } }
+// { dg-error "invalid string literal, ignoring final '\\\\'" "" { target c++26 }  .-1 }