further steps in implementing sink parameters; refs #7041

lib/system.nim

@@ -617,6 +617,11 @@ type
     ##
     ## This is only raised if the ``segfaults.nim`` module was imported!
 
+when defined(nimNewRuntime):
+  type
+    MoveError* = object of SystemError ## \
+      ## Raised on attempts to re-sink an already consumed ``sink`` parameter.
+
 {.deprecated: [TObject: RootObj, PObject: RootRef, TEffect: RootEffect,
   FTime: TimeEffect, FIO: IOEffect, FReadIO: ReadIOEffect,
   FWriteIO: WriteIOEffect, FExecIO: ExecIOEffect,

lib/system/chcks.nim

@@ -52,6 +52,11 @@ proc chckNil(p: pointer) =
   if p == nil:
     sysFatal(NilAccessError, "attempt to write to a nil address")
 
+when defined(nimNewRuntime):
+  proc chckMove(b: bool) {.compilerproc.} =
+    if not b:
+      sysFatal(MoveError, "attempt to access an object that was moved")
+
 proc chckNilDisp(p: pointer) {.compilerproc.} =
   if p == nil:
     sysFatal(NilAccessError, "cannot dispatch; dispatcher is nil")