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Fortran: improve error recovery on invalid array section 

gcc/fortran/ChangeLog:

	PR fortran/104849
	* expr.cc (find_array_section): Avoid NULL pointer dereference on
	invalid array section.

gcc/testsuite/ChangeLog:

	PR fortran/104849
	* gfortran.dg/pr104849.f90: New test.
This commit is contained in:
Harald Anlauf 2022-03-09 21:58:26 +01:00
parent e2607d71e5
commit 22015e77d3
2 changed files with 12 additions and 1 deletions
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4
gcc/fortran/expr.cc
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@ -1594,7 +1594,9 @@ find_array_section (gfc_expr *expr, gfc_ref *ref)
{
if ((begin && begin->expr_type != EXPR_CONSTANT)
|| (finish && finish->expr_type != EXPR_CONSTANT)
|| (step && step->expr_type != EXPR_CONSTANT))
|| (step && step->expr_type != EXPR_CONSTANT)
|| (!begin && !lower)
|| (!finish && !upper))
{
t = false;
goto cleanup;

9
gcc/testsuite/gfortran.dg/pr104849.f90 Normal file
View File

@ -0,0 +1,9 @@
! { dg-do compile }
! PR fortran/104849 - ICE in find_array_section
! Contributed by G.Steinmetz
program p
integer, parameter :: a(:) = [1, 2] ! { dg-error "deferred shape" }
integer :: x(2)
data x /a(:)/ ! { dg-error "Invalid" }
end