[nemiver/varobjs-support] Properly parse empty result set of -var-update

[Dodji Seketeli <dodji src gnome org>]

commit aeedc577f188df6a01b2f74f0e5f17f3278b4e0c
Author: Dodji Seketeli <dodji redhat com>
Date:   Sun Apr 12 19:53:14 2009 +0200

    Properly parse empty result set of -var-update
    
    	* GDBMIParser::parse_var_changed_list: Don't error when we get
    	an empty set of changed variables.
    	* tests/test-gdbmi.cc: New test for this case.
---
 src/dbgengine/nmv-gdbmi-parser.cc |    7 +++++++
 tests/test-gdbmi.cc               |    8 ++++++++
 2 files changed, 15 insertions(+), 0 deletions(-)

diff --git a/src/dbgengine/nmv-gdbmi-parser.cc b/src/dbgengine/nmv-gdbmi-parser.cc
index 704e76a..56ce831 100644
--- a/src/dbgengine/nmv-gdbmi-parser.cc
+++ b/src/dbgengine/nmv-gdbmi-parser.cc
@@ -6299,6 +6299,13 @@ GDBMIParser::parse_var_changed_list (UString::size_type a_from,
         return false;
     }
 
+    // Have we got an empty list ?
+    if (result->value ()->get_list_content ()->empty ()) {
+        a_vars.clear ();
+        a_to = cur;
+        return true;
+    }
+
     if (result->value ()->get_list_content ()->content_type ()
             != GDBMIList::VALUE_TYPE) {
         LOG_ERROR ("expected a TUPLE content in the LIST value of "
diff --git a/tests/test-gdbmi.cc b/tests/test-gdbmi.cc
index e0ca024..6028040 100644
--- a/tests/test-gdbmi.cc
+++ b/tests/test-gdbmi.cc
@@ -56,6 +56,9 @@ static const char *gv_output_record6="^done,numchild=\"3\",children=[child={name
 
 static const char *gv_output_record7="^done,changelist=[{name=\"var1.public.m_first_name.public.npos\",value=\"1\",in_scope=\"true\",type_changed=\"false\"}]\n";
 
+static const char *gv_output_record8="^done,changelist=[]\n";
+
+
 //the partial result of a gdbmi command: -stack-list-argument 1 command
 //this command is used to implement IDebugger::list_frames_arguments()
 static const char* gv_stack_arguments0 =
@@ -330,6 +333,11 @@ test_output_record ()
     is_ok = parser.parse_output_record (0, to, output);
     BOOST_REQUIRE (is_ok);
     BOOST_REQUIRE (output.result_record ().has_changed_var_list ());
+    // gv_output_record8 should result in 0 variable.
+    parser.push_input (gv_output_record8);
+    is_ok = parser.parse_output_record (0, to, output);
+    BOOST_REQUIRE (is_ok);
+    BOOST_REQUIRE (output.result_record ().has_changed_var_list ());
 }
 
 void