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-rw-r--r--libguile/vm-engine.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/libguile/vm-engine.c b/libguile/vm-engine.c
index 7f4641a07..ff41ce4b6 100644
--- a/libguile/vm-engine.c
+++ b/libguile/vm-engine.c
@@ -140,6 +140,8 @@ VM_NAME (SCM vm, SCM program, SCM *argv, int nargs)
goto vm_error;
vm_error_unbound:
+ /* At this point FINISH_ARGS should be a one-element list containing
+ the name of the unbound variable. */
err_msg = scm_from_locale_string ("VM: Unbound variable: ~s");
goto vm_error;