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  1. Qt
  2. QTBUG-47692

qt_is_inf and qt_is_nan are broken

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Details

    • Bug
    • Status: Closed
    • P2: Important
    • Resolution: Done
    • 5.4.0, 5.5.0
    • 5.7.0 Alpha
    • Core: Other
    • None
    • a2b58c1643b5c8b67cb18750ef2d565180a3a179

    Description

      qt_is_inf and qt_is_nan do check for the right exponent, but only check the most significant 4 bits of the mantissa. So, the binary64 value 0x7ff0000000000001 is seen as infinity instead of NaN.

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            erikv Erik Verbruggen
            erikv Erik Verbruggen
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            Dates

              Created:
              Updated:
              Resolved:

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