Merge branch 'devel' of https://github.com/Araq/Nimrod into devel

compiler/importer.nim

@@ -159,6 +159,8 @@ proc myImportModule(c: PContext, n: PNode): PSym =
   var f = checkModuleName(n)
   if f != InvalidFileIDX:
     result = importModuleAs(n, gImportModule(c.module, f))
+    if result.info.fileIndex == n.info.fileIndex:
+      localError(n.info, errGenerated, "A module cannot import itself")
     if sfDeprecated in result.flags:
       message(n.info, warnDeprecated, result.name.s)
 

tests/modules/tselfimport.nim

@@ -0,0 +1,8 @@
+discard """
+  file: "tselfimport.nim"
+  line: 6
+  errormsg: "A module cannot import itself"
+"""
+import tselfimport #ERROR
+echo("Hello World")
+