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  1. JDK
  2. JDK-8230345

LineNumberReader.ready() can return true despite read() blocking

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    • Subcomponent:
    • CPU:
      x86_64
    • OS:
      windows_10

      Description

      A DESCRIPTION OF THE PROBLEM :
      This is basically a clone of JDK-4140318. It appears the test code was understood incorrectly and therefore the evalutation was incorrect.

      The return value of Reader.ready() is described as:
      "True if the next read() is guaranteed not to block for input"

      However, if a call to LineNumberReader.read() just compressed \r\n (i.e. skipLF was set to true) then ready() will incorrectly return true even though a subsequent call to read() may block.
      The reason for this is that if read() encounters a \n it will discard it, since it has been compressed and therefore will try to read a second character.


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              • Assignee:
                bpb Brian Burkhalter
                Reporter:
                webbuggrp Webbug Group
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                • Created:
                  Updated: