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-rw-r--r--geiser/xref.scm3
1 files changed, 2 insertions, 1 deletions
diff --git a/geiser/xref.scm b/geiser/xref.scm
index 232d692..c94835a 100644
--- a/geiser/xref.scm
+++ b/geiser/xref.scm
@@ -51,7 +51,8 @@
'())))
(define (program-location p)
- (cond ((program-source p 0) =>
+ (cond ((not (program? p)) '())
+ ((program-source p 0) =>
(lambda (s) (make-location (program-path p) (source:line s))))
((program-path p) =>
(lambda (s) (make-location (program-path p) #f)))