Fortran: improve error recovery for EXTENDS_TYPE_OF() [PR106121]
gcc/fortran/ChangeLog:
PR fortran/106121
* simplify.cc (gfc_simplify_extends_type_of): Do not attempt to
simplify when one of the arguments is a CLASS variable that was
not properly declared.
gcc/testsuite/ChangeLog:
PR fortran/106121
* gfortran.dg/extends_type_of_4.f90: New test.
Co-authored-by: Steven G. Kargl <kargl@gcc.gnu.org>
(cherry picked from commit b8f284d367
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@ -3093,6 +3093,10 @@ gfc_simplify_extends_type_of (gfc_expr *a, gfc_expr *mold)
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if (UNLIMITED_POLY (a) || UNLIMITED_POLY (mold))
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return NULL;
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if ((a->ts.type == BT_CLASS && !gfc_expr_attr (a).class_ok)
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|| (mold->ts.type == BT_CLASS && !gfc_expr_attr (mold).class_ok))
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return NULL;
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/* Return .false. if the dynamic type can never be an extension. */
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if ((a->ts.type == BT_CLASS && mold->ts.type == BT_CLASS
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&& !gfc_type_is_extension_of
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@ -0,0 +1,20 @@
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! { dg-do compile }
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! PR fortran/106121 - ICE in gfc_simplify_extends_type_of
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! Contributed by G.Steinmetz
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program p
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type t
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end type
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type(t) :: x
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class(t) :: y ! { dg-error "dummy, allocatable or pointer" }
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print *, extends_type_of (x, y)
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end
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subroutine s
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type t
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integer :: i
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end type
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type(t) :: x
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class(t) :: y ! { dg-error "dummy, allocatable or pointer" }
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stop extends_type_of (x, y) ! { dg-error "STOP code" }
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end
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