Fix inputs of type int (#998)

Ronald van Haren · mr-c · commit bef1319c0f78 · 2019-02-28T20:46:39.000+02:00
diff --git a/cwltool/singularity.py b/cwltool/singularity.py
@@ -292,5 +292,6 @@ def create_runtime(self,
         env["SINGULARITYENV_HOME"] = self.builder.outdir
 
         for name, value in self.environment.items():
-            env["SINGULARITYENV_{}".format(name)] = value
+            env["SINGULARITYENV_{}".format(name)] = str(value)
         return (runtime, None)
+
