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re PR fortran/62536 (ICE (segfault) for invalid END BLOCK statement)

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PR fortran/62536
	PR fortran/66175

	* decl.c (gfc_match_end): Clean up nested BLOCKs.
	* parse.c (parse_block_construct): Deal gracefully with cleaned-up
	BLOCKs.

	* gfortran.dg/block_end_error_1.f90: New test.
	* gfortran.dg/blocks_nested_incomplete_1.f90: New test.

From-SVN: r227135
This commit is contained in:
Louis Krupp 2015-08-24 16:29:59 +00:00 committed by François-Xavier Coudert
parent 2021ff273d
commit 9f7ba2088e
6 changed files with 43 additions and 2 deletions
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8
gcc/fortran/ChangeLog
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@ -1,3 +1,11 @@
2015-08-24 Louis Krupp <louis.krupp@zoho.com>
PR fortran/62536
PR fortran/66175
* decl.c (gfc_match_end): Clean up nested BLOCKs.
* parse.c (parse_block_construct): Deal gracefully with cleaned-up
BLOCKs.
2015-08-23 Francois-Xavier Coudert <fxcoudert@gcc.gnu.org>
PR libfortran/54572

4
gcc/fortran/decl.c
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@ -6483,7 +6483,7 @@ cleanup:
/* If we are missing an END BLOCK, we created a half-ready namespace.
Remove it from the parent namespace's sibling list. */
if (state == COMP_BLOCK)
while (state == COMP_BLOCK)
{
parent_ns = gfc_current_ns->parent;
@ -6506,6 +6506,8 @@ cleanup:
gfc_free_namespace (gfc_current_ns);
gfc_current_ns = parent_ns;
gfc_state_stack = gfc_state_stack->previous;
state = gfc_current_state ();
}
return MATCH_ERROR;

7
gcc/fortran/parse.c
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@ -3935,6 +3935,7 @@ static void
parse_block_construct (void)
{
gfc_namespace* my_ns;
gfc_namespace* my_parent;
gfc_state_data s;
gfc_notify_std (GFC_STD_F2008, "BLOCK construct at %C");
@ -3948,10 +3949,14 @@ parse_block_construct (void)
push_state (&s, COMP_BLOCK, my_ns->proc_name);
gfc_current_ns = my_ns;
my_parent = my_ns->parent;
parse_progunit (ST_NONE);
gfc_current_ns = gfc_current_ns->parent;
/* Don't depend on the value of gfc_current_ns; it might have been
reset if the block had errors and was cleaned up. */
gfc_current_ns = my_parent;
pop_state ();
}

7
gcc/testsuite/ChangeLog
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@ -1,3 +1,10 @@
2015-08-24 Louis Krupp <louis.krupp@zoho.com>
PR fortran/62536
PR fortran/66175
* gfortran.dg/block_end_error_1.f90: New test.
* gfortran.dg/blocks_nested_incomplete_1.f90: New test.
2015-08-24 H.J. Lu <hongjiu.lu@intel.com>
PR target/66821

10
gcc/testsuite/gfortran.dg/block_end_error_1.f90 Normal file
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@ -0,0 +1,10 @@
! { dg-do compile }
!
! PR fortran/62536
! Bad "end block" causes ICE.
subroutine s
block
end block named ! { dg-error "Syntax error in END BLOCK statement" }
return
endsubroutine
! { dg-prune-output "Unexpected end of file" }

9
gcc/testsuite/gfortran.dg/blocks_nested_incomplete_1.f90 Normal file
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@ -0,0 +1,9 @@
! { dg-do compile }
!
! PR fortran/66175
! Nested incomplete blocks cause ICE.
program main
block
block
end program ! { dg-error "Expecting END BLOCK statement" }
! { dg-prune-output "Unexpected end of file" }