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-rw-r--r--compiler/service.nim1
1 files changed, 1 insertions, 0 deletions
diff --git a/compiler/service.nim b/compiler/service.nim
index 42c4aa9f4..2b861e1c7 100644
--- a/compiler/service.nim
+++ b/compiler/service.nim
@@ -84,6 +84,7 @@ proc serve*(action: proc (){.nimcall.}) =
   of "tcp", "":
     when useCaas:
       var server = socket()
+      if server == invalidSocket: osError(osLastError())
       let p = getConfigVar("server.port")
       let port = if p.len > 0: parseInt(p).TPort else: 6000.TPort
       server.bindAddr(port, getConfigVar("server.address"))