Committed as obvious on mastger.
Regtested on x86_64-pc-linux-gnu.
Will backport to 10-branch.
Thanks,
Harald
PR fortran/95978 - ICE in gfc_match_data, at fortran/decl.c:731
Catch NULL pointer dereference on invalid DATA statement.
gcc/fortran/
PR fortran/95978
* decl.c (gfc_match_data): Avoid NULL pointer dereference.
diff --git a/gcc/fortran/decl.c b/gcc/fortran/decl.c
index ac1f63f66e0..f38def4c291 100644
--- a/gcc/fortran/decl.c
+++ b/gcc/fortran/decl.c
@@ -728,7 +728,7 @@ gfc_match_data (void)
gfc_constructor *c;
c = gfc_constructor_first (new_data->value->expr->value.constructor);
for (; c; c = gfc_constructor_next (c))
- if (c->expr->ts.type == BT_BOZ)
+ if (c->expr && c->expr->ts.type == BT_BOZ)
{
gfc_error ("BOZ literal constant at %L cannot appear in a "
"structure constructor", &c->expr->where);
diff --git a/gcc/testsuite/gfortran.dg/pr95978.f90 b/gcc/testsuite/gfortran.dg/pr95978.f90
new file mode 100644
index 00000000000..47bd7067096
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/pr95978.f90
@@ -0,0 +1,10 @@
+! { dg-do compile }
+! PR fortran/95978 - ICE in gfc_match_data, at fortran/decl.c:731
+
+program p
+ type t
+ integer :: a
+ type(t), allocatable :: b
+ data c /t(1)/ ! { dg-error "Unexpected DATA statement" }
+ end type t
+end
