[PATCH] guile: Type-check the argument to 'history-append!'

The patch below add a missing type check in ‘history-append!’ (I’m guilty.)

OK to push?

Ludo’.

gdb/
2014-06-05  Ludovic Courtès  <[email protected]>

	* guile/scm-value.c (gdbscm_history_append_x): Use
	'vlscm_get_value_smob_arg_unsafe' instead of
	'vlscm_scm_to_value'.

gdb/testsuite/
2014-06-05  Ludovic Courtès  <[email protected]>

	* gdb.guile/scm-value.exp (test_value_in_inferior): Add test
	"history-append! type error".

diff --git a/gdb/guile/scm-value.c b/gdb/guile/scm-value.c
index 8e579a4..0ae8103 100644
--- a/gdb/guile/scm-value.c
+++ b/gdb/guile/scm-value.c
@@ -1295,9 +1295,11 @@ gdbscm_history_append_x (SCM value)
 {
   int res_index = -1;
   struct value *v;
+  value_smob *v_smob;
   volatile struct gdb_exception except;
 
-  v = vlscm_scm_to_value (value);
+  v_smob = vlscm_get_value_smob_arg_unsafe (value, SCM_ARG1, FUNC_NAME);
+  v = v_smob->value;
 
   TRY_CATCH (except, RETURN_MASK_ALL)
     {

diff --git a/gdb/testsuite/gdb.guile/scm-value.exp b/gdb/testsuite/gdb.guile/scm-value.exp
index 2784da2..425873e 100644
--- a/gdb/testsuite/gdb.guile/scm-value.exp
+++ b/gdb/testsuite/gdb.guile/scm-value.exp
@@ -71,6 +71,10 @@ proc test_value_in_inferior {} {
     gdb_test_no_output "guile (gc)"
     gdb_test "p \$\$" "= 42"
 
+    # Make sure 'history-append!' rejects non-value objects.
+    gdb_test "gu (history-append! 123)" \
+	"ERROR:.* Wrong type argument.*" "history-append! type error"
+
     # Test dereferencing the argv pointer.
 
     # Just get inferior variable argv the value history, available to guile.