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-rw-r--r--lib/pure/ioselects/ioselectors_epoll.nim2
-rw-r--r--lib/pure/selectors.nim4
2 files changed, 3 insertions, 3 deletions
diff --git a/lib/pure/ioselects/ioselectors_epoll.nim b/lib/pure/ioselects/ioselectors_epoll.nim
index 08cb6ed74..510de8c51 100644
--- a/lib/pure/ioselects/ioselectors_epoll.nim
+++ b/lib/pure/ioselects/ioselectors_epoll.nim
@@ -138,7 +138,7 @@ template checkFd(s, f) =
     var numFD = s.numFD
     while numFD <= f: numFD *= 2
     when hasThreadSupport:
-      s.fds = reallocSharedArray(s.fds, numFD)
+      s.fds = reallocSharedArray(s.fds, s.numFD, numFD)
     else:
       s.fds.setLen(numFD)
     for i in s.numFD ..< numFD:
diff --git a/lib/pure/selectors.nim b/lib/pure/selectors.nim
index fc65e0e9b..2d10e3f32 100644
--- a/lib/pure/selectors.nim
+++ b/lib/pure/selectors.nim
@@ -247,8 +247,8 @@ else:
     proc allocSharedArray[T](nsize: int): ptr SharedArray[T] =
       result = cast[ptr SharedArray[T]](allocShared0(sizeof(T) * nsize))
 
-    proc reallocSharedArray[T](sa: ptr SharedArray[T], nsize: int): ptr SharedArray[T] =
-      result = cast[ptr SharedArray[T]](reallocShared(sa, sizeof(T) * nsize))
+    proc reallocSharedArray[T](sa: ptr SharedArray[T], oldsize, nsize: int): ptr SharedArray[T] =
+      result = cast[ptr SharedArray[T]](reallocShared0(sa, oldsize * sizeof(T), sizeof(T) * nsize))
 
     proc deallocSharedArray[T](sa: ptr SharedArray[T]) =
       deallocShared(cast[pointer](sa))