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src/Pure/Tools/build.scala
changeset 65506 359fc6266a00
parent 65471 05e5bffcf1d8
child 65517 1544e61e5314 
--- a/src/Pure/Tools/build.scala	Tue Apr 18 16:34:58 2017 +0200
+++ b/src/Pure/Tools/build.scala	Tue Apr 18 19:14:01 2017 +0200
@@ -190,8 +190,7 @@
       }
 
     private val graph_file = Isabelle_System.tmp_file("session_graph", "pdf")
-    try { isabelle.graphview.Graph_File.write(options, graph_file, deps(name).session_graph) }
-    catch { case ERROR(_) => /*error should be exposed in ML*/ }
+    isabelle.graphview.Graph_File.write(options, graph_file, deps(name).session_graph)
 
     private val future_result: Future[Process_Result] =
       Future.thread("build") {
isabelle