fix #16706 (#16717) [backport:1.4]

2021-01-14 09:52:00 -06:00 · 2021-01-14 09:52:00 -06:00 · ef9027c290
commit ef9027c290
parent 94430a2e6d
2 changed files with 40 additions and 1 deletions
--- a/lib/system/assign.nim
+++ b/lib/system/assign.nim
@ -122,7 +122,9 @@ proc genericAssignAux(dest, src: pointer, mt: PNimType, shallow: bool) =
      #     var tbObj = TB(p)
      #     tbObj of TC # needs to be false!
      #c_fprintf(stdout, "%s %s\n", pint[].name, mt.name)
-      chckObjAsgn(cast[ptr PNimType](src)[], mt)
+      let srcType = cast[ptr PNimType](src)[] # object is not initialized properly(for example std/times.DateTime)
+      if srcType != nil:
+        chckObjAsgn(srcType, mt)
      pint[] = mt # cast[ptr PNimType](src)[]
  of tyTuple:
    genericAssignAux(dest, src, mt.node, shallow)