[binutils-gdb] Fix coredump-filter.exp by correctly unsetting array

[Sergio Durigan Junior <sergiodj at sourceware dot org>]

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=f7797074a5dc314f8922d2e90c1a4ea04b189c36

commit f7797074a5dc314f8922d2e90c1a4ea04b189c36
Author: Sergio Durigan Junior <sergiodj@redhat.com>
Date:   Fri May 8 13:19:19 2015 -0400

    Fix coredump-filter.exp by correctly unsetting array
    
    In my last commit to make gdb.base/coredump-filter.exp be more robust
    regarding using arrays in the global namespace, I cleared the
    "coredump_var_addr" array like this:
    
      set coredump_var_addr ""
      # use coredump_var_addr as an array...
    
    This causes DejaGNU to complain because the variable is first set as
    non-array, and the used as an array.  The correct way to do this is to
    unset the variable using:
    
      unset -nocomplain coredump_var_addr
      # use coredump_var_addr as an array...
    
    The "-nocomplain" part is necessary because if the variable doesn't
    exist "unset" will not error.
    
    Tested on Fedora 20 x86_64.
    
    gdb/testsuite/ChangeLog:
    2015-05-08  Sergio Durigan Junior  <sergiodj@redhat.com>
    
    	* gdb.base/coredump-filter.exp: Correctly unset
    	"coredump_var_addr" array.

Diff:
---
 gdb/testsuite/ChangeLog                    | 5 +++++
 gdb/testsuite/gdb.base/coredump-filter.exp | 2 +-
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/gdb/testsuite/ChangeLog b/gdb/testsuite/ChangeLog
index 4064b28..f4ee04a 100644
--- a/gdb/testsuite/ChangeLog
+++ b/gdb/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2015-05-08  Sergio Durigan Junior  <sergiodj@redhat.com>
+
+	* gdb.base/coredump-filter.exp: Correctly unset
+	"coredump_var_addr" array.
+
 2015-05-08  Pedro Alves  <palves@redhat.com>
 
 	* gdb.server/non-existing-program.exp: Unset spawn_id.
diff --git a/gdb/testsuite/gdb.base/coredump-filter.exp b/gdb/testsuite/gdb.base/coredump-filter.exp
index 8638ab0..81f5d42 100644
--- a/gdb/testsuite/gdb.base/coredump-filter.exp
+++ b/gdb/testsuite/gdb.base/coredump-filter.exp
@@ -167,7 +167,7 @@ gdb_test_multiple "print/x &main" "getting main's address" {
 
 # Obtain the address of each variable that will be checked on each
 # case.
-set coredump_var_addr ""
+unset -nocomplain coredump_var_addr
 foreach item $all_anon_corefiles {
     foreach name [list [lindex $item 3] [lindex $item 4]] {
 	set test "print/x $name"