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Fix ICE and improve errors for invalid anonymous structure declarations. 

PR fortran/78277
	* gcc/fortran/decl.c (gfc_match_data_decl): Gracefully handle bad
	anonymous structure declarations.

	PR fortran/78277
	* gcc/testsuite/gfortran.dg/dec_structure_17.f90: New test.

From-SVN: r242058
This commit is contained in:
Fritz O. Reese 2016-11-10 21:57:13 +00:00 committed by Fritz Reese
parent 05b8fcb4d2
commit 9490321264
4 changed files with 60 additions and 1 deletions
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6
gcc/fortran/ChangeLog
View File

@ -1,3 +1,9 @@
2016-11-10 Fritz O. Reese <fritzoreese@gmail.com>
PR fortran/78277
* gcc/fortran/decl.c (gfc_match_data_decl): Gracefully handle bad
anonymous structure declarations.
2016-11-10 Fritz O. Reese <fritzoreese@gmail.com>
* decl.c (get_struct_decl, gfc_match_map, gfc_match_union): Fix

23
gcc/fortran/decl.c
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@ -4901,7 +4901,28 @@ ok:
}
if (!gfc_error_flag_test ())
gfc_error ("Syntax error in data declaration at %C");
{
/* An anonymous structure declaration is unambiguous; if we matched one
according to gfc_match_structure_decl, we need to return MATCH_YES
here to avoid confusing the remaining matchers, even if there was an
error during variable_decl. We must flush any such errors. Note this
causes the parser to gracefully continue parsing the remaining input
as a structure body, which likely follows. */
if (current_ts.type == BT_DERIVED && current_ts.u.derived
&& gfc_fl_struct (current_ts.u.derived->attr.flavor))
{
gfc_error_now ("Syntax error in anonymous structure declaration"
" at %C");
/* Skip the bad variable_decl and line up for the start of the
structure body. */
gfc_error_recovery ();
m = MATCH_YES;
goto cleanup;
}
gfc_error ("Syntax error in data declaration at %C");
}
m = MATCH_ERROR;
gfc_free_data_all (gfc_current_ns);

5
gcc/testsuite/ChangeLog
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@ -1,3 +1,8 @@
2016-11-10 Fritz O. Reese <fritzoreese@gmail.com>
PR fortran/78277
* gfortran.dg/dec_structure_17.f90: New test.
2016-11-10 Michael Meissner <meissner@linux.vnet.ibm.com>
* gcc.target/powerpc/vsx-qimode.c: New test for QImode, HImode

27
gcc/testsuite/gfortran.dg/dec_structure_17.f90 Normal file
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@ -0,0 +1,27 @@
! { dg-do compile }
! { dg-options "-fdec-structure" }
!
! PR fortran/78277
!
! Fix ICE for invalid structure declaration code.
!
subroutine sub1()
structure /s/
structure t
integer i
end structure
end structure
record /s/ u
interface
subroutine sub0(u)
structure /s/
structure t. ! { dg-error "Syntax error in anonymous structure decl" }
integer i
end structure
end structure
record /s/ u
end
end interface
call sub0(u)
end