[Regression, patch][Fortran] ICE in gfc_conv_constant_to_tree PR93604

[Regression, patch][Fortran] ICE in gfc_conv_constant_to_tree PR93604

[Mark Eggleston]

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Please find attached patch for PR93604.

gcc/fortran/ChangeLog

     Steven G. Kargl  <kargl@gcc.gnu.org>

     PR fortran/93604
     * decl.c (gfc_match_data) : Check whether the data expression
     is a derived type and is a constructor. If a BOZ constant
     is encountered in the constructor output an error and return
     MATCH_ERROR.

gcc/testsuite/ChangeLog

     Mark Eggleston  <mark.eggleston@codethink.com>

     PR fortran/93604
     * gfortran.dg/pr93604.f90 : New test.

OK to commit?

-- 
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From b4bd5742d842c860da5b35955301e3c1a1e06160 Mon Sep 17 00:00:00 2001
From: Mark Eggleston <markeggleston@gcc.gnu.org>
Date: Thu, 6 Feb 2020 13:42:33 +0000
Subject: [PATCH] [Fortran] ICE in gfc_conv_constant_to_tree PR93604

Using a BOZ constant in a structure constructor in a data statement
resulted in an ICE. Output a "BOZ literal constant cannot appear in
a structure constructor" error message instead.

Original patch provided by Steven G. Kargl  <kargl@gcc.gnu.org>.

Test case added later.

gcc/fortran/ChangeLog

	* decl.c (gfc_match_data) : Check whether the data expression
	is a derived type and is a constructor. If a BOZ constant
	is encountered in the constructor output an error and return
	MATCH_ERROR.

gcc/testsuite/ChangeLog

	* gfortran.dg/pr93604.f90 : New test.
---
 gcc/fortran/decl.c                    | 16 ++++++++++++++++
 gcc/testsuite/gfortran.dg/pr93604.f90 | 10 ++++++++++
 2 files changed, 26 insertions(+)
 create mode 100644 gcc/testsuite/gfortran.dg/pr93604.f90

diff --git a/gcc/fortran/decl.c b/gcc/fortran/decl.c
index 499d2429aba..7382fea03e4 100644
--- a/gcc/fortran/decl.c
+++ b/gcc/fortran/decl.c
@@ -716,6 +716,22 @@ gfc_match_data (void)
       new_data->next = gfc_current_ns->data;
       gfc_current_ns->data = new_data;
 
+      /* A BOZ literal constant cannot appear in a structure constructor.
+	 Check for that here for a data statement value.  */
+      if (new_data->value->expr->ts.type == BT_DERIVED
+	  && new_data->value->expr->value.constructor)
+	{
+	  gfc_constructor *c;
+	  c = gfc_constructor_first (new_data->value->expr->value.constructor);
+	  for (; c; c = gfc_constructor_next (c))
+	    if (c->expr->ts.type == BT_BOZ)
+	      {
+		gfc_error ("BOZ literal constant at %L cannot appear in a "
+			   "structure constructor", &c->expr->where);
+		return MATCH_ERROR;
+	      }
+	}
+
       if (gfc_match_eos () == MATCH_YES)
 	break;
 
diff --git a/gcc/testsuite/gfortran.dg/pr93604.f90 b/gcc/testsuite/gfortran.dg/pr93604.f90
new file mode 100644
index 00000000000..2c695d37829
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/pr93604.f90
@@ -0,0 +1,10 @@
+! { dg-do compile }
+
+program p
+   type t
+      integer :: a
+   end type
+   type(t) :: x
+   data x /t(z'1')/ ! { dg-error "cannot appear in a structure constructor" }
+end
+
-- 
2.11.0

Re: [Regression, patch][Fortran] ICE in gfc_conv_constant_to_tree PR93604

[Mark Eggleston]

**ping**

On 17/02/2020 11:26, Mark Eggleston wrote:
> Please find attached patch for PR93604.
>
> gcc/fortran/ChangeLog
>
>     Steven G. Kargl  <kargl@gcc.gnu.org>
>
>     PR fortran/93604
>     * decl.c (gfc_match_data) : Check whether the data expression
>     is a derived type and is a constructor. If a BOZ constant
>     is encountered in the constructor output an error and return
>     MATCH_ERROR.
>
> gcc/testsuite/ChangeLog
>
>     Mark Eggleston  <mark.eggleston@codethink.com>
>
>     PR fortran/93604
>     * gfortran.dg/pr93604.f90 : New test.
>
> OK to commit?
>
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https://www.codethink.co.uk/privacy.html

Re: [Regression, patch][Fortran] ICE in gfc_conv_constant_to_tree PR93604

[Thomas Koenig]

Hi Mark,

> **ping**

OK!

Regards

	Thomas