test stdout for nil

Author: sebsto

Plugins/AWSLambdaPackager/PluginUtils.swift

@@ -32,7 +32,7 @@ struct Utils {
 
         let fd = dup(1)
         let stdout = fdopen(fd, "rw")
-        defer { fclose(stdout) }
+        defer { if let so = stdout { fclose(so) } }
 
         // We need to use an unsafe transfer here to get the fd into our Sendable closure.
         // This transfer is fine, because we write to the variable from a single SerialDispatchQueue here.