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* [gcc r12-5847] Fortran: avoid NULL pointer dereference on missing or bad dummy arguments
@ 2021-12-08 20:15 Harald Anlauf
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From: Harald Anlauf @ 2021-12-08 20:15 UTC (permalink / raw)
To: gcc-cvs
https://gcc.gnu.org/g:b77968a70537429b4f548f90c369d26e6b6943cc
commit r12-5847-gb77968a70537429b4f548f90c369d26e6b6943cc
Author: Harald Anlauf <anlauf@gmx.de>
Date: Wed Dec 8 21:14:19 2021 +0100
Fortran: avoid NULL pointer dereference on missing or bad dummy arguments
gcc/fortran/ChangeLog:
PR fortran/103609
* symbol.c (gfc_sym_get_dummy_args): Catch NULL pointer
dereference.
gcc/testsuite/ChangeLog:
PR fortran/103609
* gfortran.dg/pr103609.f90: New test.
Diff:
---
gcc/fortran/symbol.c | 3 +++
gcc/testsuite/gfortran.dg/pr103609.f90 | 15 +++++++++++++++
2 files changed, 18 insertions(+)
diff --git a/gcc/fortran/symbol.c b/gcc/fortran/symbol.c
index 179f6029ca3..ebd99846610 100644
--- a/gcc/fortran/symbol.c
+++ b/gcc/fortran/symbol.c
@@ -5240,6 +5240,9 @@ gfc_sym_get_dummy_args (gfc_symbol *sym)
{
gfc_formal_arglist *dummies;
+ if (sym == NULL)
+ return NULL;
+
dummies = sym->formal;
if (dummies == NULL && sym->ts.interface != NULL)
dummies = sym->ts.interface->formal;
diff --git a/gcc/testsuite/gfortran.dg/pr103609.f90 b/gcc/testsuite/gfortran.dg/pr103609.f90
new file mode 100644
index 00000000000..57f6a3b1531
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/pr103609.f90
@@ -0,0 +1,15 @@
+! { dg-do compile }
+! PR fortran/103609 - ICE in gfc_sym_get_dummy_args
+! Contributed by G.Steinmetz
+
+program p
+ implicit none
+ integer :: i
+ do i = 1, 2
+ call s
+ end do
+contains
+ subroutine s
+ call sub(x) ! { dg-error "has no IMPLICIT type" }
+ end
+end
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