1 files changed, 35 insertions, 0 deletions
diff --git a/tests/notnil/tnotnil3.nim b/tests/notnil/tnotnil3.nim
new file mode 100644
index 000000000..31a4efef7
--- /dev/null
+++ b/tests/notnil/tnotnil3.nim
@@ -0,0 +1,35 @@
+discard """
+  errormsg: "cannot prove 'variable' is not nil"
+  line: 31
+"""
+
+# bug #584
+# Testprogram for 'not nil' check
+{.experimental: "notnil".}
+const testWithResult = true
+
+type
+  A = object
+  B = object
+  C = object
+    a: ref A
+    b: ref B
+
+
+proc testNotNil(c: ref C not nil) =
+  discard
+
+
+when testWithResult:
+  proc testNotNilOnResult(): ref C =
+    new(result)
+    #result.testNotNil() # Here 'not nil' can't be proved
+
+
+var variable: ref C
+new(variable)
+variable.testNotNil() # Here 'not nil' is proved
+
+when testWithResult:
+  discard testNotNilOnResult()
+