adds a test case (#1109)

Author: Araq

src/nimony/sembasics.nim

@@ -167,6 +167,9 @@ proc buildErr*(c: var SemContext; info: PackedLineInfo; msg: string; orig: Curso
   when defined(debug):
     if not c.debugAllowErrors:
       writeStackTrace()
+      for instFrom in items(c.instantiatedFrom):
+        echo "instantiated from: ", infoToStr(instFrom)
+
       echo infoToStr(info) & " Error: " & msg
       if orig.kind != DotToken:
         echo "Source: ", toString(orig, false)

tests/nimony/lookups/deps/mprivatefield.nim

@@ -0,0 +1,11 @@
+
+type
+  ImportedObject* = object
+    private: int
+    public*: string
+
+  GenObj*[T] = object
+    private: T
+    public*: T
+
+proc importedProc*(): ImportedObject = ImportedObject(private: 4, public: "abc")

tests/nimony/lookups/tprivatefield.msgs

@@ -0,0 +1,4 @@
+tests/nimony/lookups/tprivatefield.nim(6, 1) Error: undeclared field: 'private=' for type ImportedObject.0.mpruewjqm1
+tests/nimony/lookups/tprivatefield.nim(8, 38) Error: undeclared field: 'private' for type ImportedObject.0.mpruewjqm1
+tests/nimony/lookups/tprivatefield.nim(10, 33) Error: undeclared field: 'private' for type GenObj.0.Irgvple1.tprac4dzs1
+tests/nimony/lookups/tprivatefield.nim(11, 10) Error: undeclared field: 'private' for type GenObj.0.Irgvple1.tprac4dzs1

tests/nimony/lookups/tprivatefield.nim

@@ -0,0 +1,11 @@
+
+import deps / mprivatefield
+
+var x = importedProc() #: ImportedObject
+x.public = "valid"
+x.private = 0
+
+var y = ImportedObject(public: "my", private: 45)
+
+let z = GenObj[int](public: 12, private: 89)
+discard z.private