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-rw-r--r--libguile/vm-engine.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/libguile/vm-engine.c b/libguile/vm-engine.c
index a79786015..3956a389d 100644
--- a/libguile/vm-engine.c
+++ b/libguile/vm-engine.c
@@ -176,6 +176,10 @@ vm_run (SCM vm, SCM program, SCM args)
err_args = SCM_EOL;
goto vm_error;
+ vm_error_improper_list:
+ err_msg = scm_from_locale_string ("VM: Attempt to unroll an improper list: tail is ~A");
+ goto vm_error;
+
vm_error_no_values:
err_msg = scm_from_locale_string ("VM: 0-valued return");
err_args = SCM_EOL;