fortran: ICE using undeclared symbol in array constructor PR93484

Using undeclared symbol k in an expression in the following
array constructor results in an ICE:

    print *, [real(x(k))]

If the call to the intrinsic is not in a constructor a no IMPLICIT
type error is reported and the ICE does not occur.

Matching on an expression instead of an initialisation express an
and not converting a MATCH_ERROR return value into MATCH_NO results
in the no IMPLICIT error and no ICE.

Note: Steven G. Kargl  <kargl@gcc.gnu.org> is the author of the
changes except for the test cases.

gcc/fortran/ChangeLog:

	PR fortran/93484
	* match.c (gfc_match_type_spec): Replace gfc_match_init_expr with
	gfc_match_expr. Return m if m is MATCH_NO or MATCH_ERROR.

gcc/testsuite

	PR fortran/93484
	* gfortran.dg/pr93484_1.f90: New test.
	* gfortran.dg/pr93484_2.f90: New test.

diff --git a/gcc/fortran/ChangeLog b/gcc/fortran/ChangeLog
index 0591579..0f6dab3 100644 (file)
--- a/gcc/fortran/ChangeLog
+++ b/gcc/fortran/ChangeLog
@@ -1,3 +1,9 @@
+2020-03-25  Steven G. Kargl  <kargl@gcc.gnu.org>
+
+       PR fortran/93484
+       * match.c (gfc_match_type_spec): Replace gfc_match_init_expr with
+       gfc_match_expr. Return m if m is MATCH_NO or MATCH_ERROR.
+
 2020-03-23  Mark Eggleston  <mark.eggleston@codethink.com>
        Steven G. Kargl  <kargl@gcc.gnu.org>
 

diff --git a/gcc/fortran/match.c b/gcc/fortran/match.c
index 3a0c097..8443d20 100644 (file)
--- a/gcc/fortran/match.c
+++ b/gcc/fortran/match.c
@@ -2248,9 +2248,9 @@ gfc_match_type_spec (gfc_typespec *ts)
 
 found:
 
-      m = gfc_match_init_expr (&e);
+      m = gfc_match_expr (&e);
       if (m == MATCH_NO || m == MATCH_ERROR)
-       return MATCH_NO;
+       return m;
 
       /* If a comma appears, it is an intrinsic subprogram. */
       gfc_gobble_whitespace ();

diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index b68779f..4711a09 100644 (file)
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,9 @@
+2020-03-25  Mark Eggleston  <mark.eggleston@codethink.com>
+
+       PR fortran/93484
+       * gfortran.dg/pr93484_1.f90: New test.
+       * gfortran.dg/pr93484_2.f90: New test.
+
 2020-03-25  Jakub Jelinek  <jakub@redhat.com>
 
        PR middle-end/94303

diff --git a/gcc/testsuite/gfortran.dg/pr93484_1.f90 b/gcc/testsuite/gfortran.dg/pr93484_1.f90
new file mode 100644 (file)
index 0000000..3b6dbc9
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/pr93484_1.f90
@@ -0,0 +1,8 @@
+! { dg-do compile }
+!
+program p
+  implicit none
+  integer :: x(4) = [1,2,3,4]
+  print *, [real(x(k))] ! { dg-error "Symbol 'k' at .1. has no IMPLICIT type" } 
+end
+

diff --git a/gcc/testsuite/gfortran.dg/pr93484_2.f90 b/gcc/testsuite/gfortran.dg/pr93484_2.f90
new file mode 100644 (file)
index 0000000..4a7f433
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/pr93484_2.f90
@@ -0,0 +1,8 @@
+! { dg-do compile }
+!
+program p
+  implicit none
+  integer, parameter :: x(4) = [1,2,3,4]
+  print *, [real(x(k))] ! { dg-error "Symbol 'k' at .1. has no IMPLICIT type" }
+end
+