From 583812c2e2f3593823622b0a5821d957c832dbd0 Mon Sep 17 00:00:00 2001 From: Harald Anlauf Date: Mon, 29 Jun 2020 23:20:16 +0200 Subject: [PATCH] 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. --- gcc/fortran/decl.c | 2 +- gcc/testsuite/gfortran.dg/pr95978.f90 | 10 ++++++++++ 2 files changed, 11 insertions(+), 1 deletion(-) create mode 100644 gcc/testsuite/gfortran.dg/pr95978.f90 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 -- 2.30.2