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Fortran: error recovery after reference to bad CLASS variable [PR107681]

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gcc/fortran/ChangeLog:

	PR fortran/107681
	* resolve.cc (resolve_fl_var_and_proc): Prevent NULL pointer
	dereference with reference to bad CLASS variable.

gcc/testsuite/ChangeLog:

	PR fortran/107681
	* gfortran.dg/pr107681.f90: New test.
This commit is contained in:
Harald Anlauf 2022-11-16 21:41:19 +01:00
parent 713dcfc85e
commit 96e4244ef3
2 changed files with 14 additions and 0 deletions
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1
gcc/fortran/resolve.cc
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@ -12967,6 +12967,7 @@ resolve_fl_var_and_proc (gfc_symbol *sym, int mp_flag)
&& sym->ts.u.derived
&& !sym->attr.select_type_temporary
&& !UNLIMITED_POLY (sym)
&& CLASS_DATA (sym)->ts.u.derived
&& !gfc_type_is_extensible (CLASS_DATA (sym)->ts.u.derived))
{
gfc_error ("Type %qs of CLASS variable %qs at %L is not extensible",

13
gcc/testsuite/gfortran.dg/pr107681.f90 Normal file
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@ -0,0 +1,13 @@
! { dg-do compile }
! { dg-options "-fcoarray=lib" }
! PR fortran/107681 - ICE in gfc_type_is_extensible
! Contributed by G.Steinmetz
program p
type t
integer, allocatable :: a
end type
class(t) :: x[*] ! { dg-error "must be dummy, allocatable or pointer" }
associate (y => x) ! { dg-error "Invalid array reference" }
end associate
end