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-rw-r--r--ravanan/javascript.scm4
1 files changed, 3 insertions, 1 deletions
diff --git a/ravanan/javascript.scm b/ravanan/javascript.scm
index 1523d25..2206431 100644
--- a/ravanan/javascript.scm
+++ b/ravanan/javascript.scm
@@ -263,4 +263,6 @@ keys @code{\"inputs\"}, @code{\"self\"} and @code{\"runtime\"}.
 
   (match (peg:tree (match-pattern javascript str))
     (('javascript expression-trees ...)
-     (evaluate (trim expression-trees)))))
+     (evaluate (trim expression-trees)))
+    (_
+     (error "Unable to parse javascript" str))))