Dear all,
I intend to commit the attached patch as obvious to mainline
within the next 24h unless someone complains. It replaces a
lazy gfc_internal_error by an explicit error message and an
error recovery path.
As a side-effect, we now diagnose a previously missed error
in testcase gfortran.dg/associate_54.f90 similarly to Intel.
Regtested on x86_64-pc-linux-gnu.
Thanks,
Harald
From e6ecc4d8227afea565b0555e95a4f5dcb8f4ecab Mon Sep 17 00:00:00 2001
From: Harald Anlauf <anl...@gmx.de>
Date: Mon, 18 Jul 2022 22:34:53 +0200
Subject: [PATCH] Fortran: error recovery on invalid array reference of
non-array [PR103590]
gcc/fortran/ChangeLog:
PR fortran/103590
* resolve.cc (find_array_spec): Change function result to bool to
enable error recovery. Generate error message for missing array
spec instead of an internal error.
(gfc_resolve_ref): Use function result from find_array_spec for
error recovery.
gcc/testsuite/ChangeLog:
PR fortran/103590
* gfortran.dg/associate_54.f90: Adjust.
* gfortran.dg/associate_59.f90: New test.
---
gcc/fortran/resolve.cc | 13 ++++++++++---
gcc/testsuite/gfortran.dg/associate_54.f90 | 3 +--
gcc/testsuite/gfortran.dg/associate_59.f90 | 9 +++++++++
3 files changed, 20 insertions(+), 5 deletions(-)
create mode 100644 gcc/testsuite/gfortran.dg/associate_59.f90
diff --git a/gcc/fortran/resolve.cc b/gcc/fortran/resolve.cc
index 2ebf076f730..dacd33561d0 100644
--- a/gcc/fortran/resolve.cc
+++ b/gcc/fortran/resolve.cc
@@ -4976,7 +4976,7 @@ gfc_resolve_dim_arg (gfc_expr *dim)
static void
resolve_assoc_var (gfc_symbol* sym, bool resolve_target);
-static void
+static bool
find_array_spec (gfc_expr *e)
{
gfc_array_spec *as;
@@ -5004,7 +5004,11 @@ find_array_spec (gfc_expr *e)
{
case REF_ARRAY:
if (as == NULL)
- gfc_internal_error ("find_array_spec(): Missing spec");
+ {
+ gfc_error ("Symbol %qs at %L has not been declared as an array",
+ e->symtree->n.sym->name, &e->where);
+ return false;
+ }
ref->u.ar.as = as;
as = NULL;
@@ -5028,6 +5032,8 @@ find_array_spec (gfc_expr *e)
if (as != NULL)
gfc_internal_error ("find_array_spec(): unused as(2)");
+
+ return true;
}
@@ -5346,7 +5352,8 @@ gfc_resolve_ref (gfc_expr *expr)
for (ref = expr->ref; ref; ref = ref->next)
if (ref->type == REF_ARRAY && ref->u.ar.as == NULL)
{
- find_array_spec (expr);
+ if (!find_array_spec (expr))
+ return false;
break;
}
diff --git a/gcc/testsuite/gfortran.dg/associate_54.f90 b/gcc/testsuite/gfortran.dg/associate_54.f90
index 003175a47fd..b23a4f160ac 100644
--- a/gcc/testsuite/gfortran.dg/associate_54.f90
+++ b/gcc/testsuite/gfortran.dg/associate_54.f90
@@ -26,9 +26,8 @@ contains
integer, intent(in) :: a
associate (state => obj%state(TEST_STATES)) ! { dg-error "is used as array" }
! state = a
- state(TEST_STATE) = a
+ state(TEST_STATE) = a ! { dg-error "has not been declared as an array" }
end associate
end subroutine test_alter_state1
end module test
-
diff --git a/gcc/testsuite/gfortran.dg/associate_59.f90 b/gcc/testsuite/gfortran.dg/associate_59.f90
new file mode 100644
index 00000000000..2da97731d39
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/associate_59.f90
@@ -0,0 +1,9 @@
+! { dg-do compile }
+! PR fortran/103590 - ICE: find_array_spec(): Missing spec
+! Contributed by G.Steinmetz
+
+program p
+ associate (a => 1)
+ print *, [character(a(1)) :: '1'] ! { dg-error "Scalar INTEGER expression" }
+ end associate
+end
--
2.35.3
