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<TITLE> [Mono-bugs] [Bug 619811] New: TimeZoneInfo.ConvertTimeFromUtc throws a NullReferenceException for US/Hawaii timezone
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<H1>[Mono-bugs] [Bug 619811] New: TimeZoneInfo.ConvertTimeFromUtc throws a NullReferenceException for US/Hawaii timezone</H1>
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<B>bugzilla_noreply at novell.com</B>
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<A HREF="mailto:mono-bugs%40lists.ximian.com?Subject=%5BMono-bugs%5D%20%5BBug%20619811%5D%20New%3A%20TimeZoneInfo.ConvertTimeFromUtc%0A%20throws%20a%20NullReferenceException%20for%20US/Hawaii%20timezone&In-Reply-To="
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TITLE="[Mono-bugs] [Bug 619811] New: TimeZoneInfo.ConvertTimeFromUtc throws a NullReferenceException for US/Hawaii timezone">bugzilla_noreply at novell.com
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</A><BR>
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<I>Sun Jul 4 21:04:10 EDT 2010</I>
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<PRE><A HREF="http://bugzilla.novell.com/show_bug.cgi?id=619811">http://bugzilla.novell.com/show_bug.cgi?id=619811</A>
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<A HREF="http://bugzilla.novell.com/show_bug.cgi?id=619811#c0">http://bugzilla.novell.com/show_bug.cgi?id=619811#c0</A>
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Summary: TimeZoneInfo.ConvertTimeFromUtc throws a
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NullReferenceException for US/Hawaii timezone
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Classification: Mono
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Product: Mono: Class Libraries
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Version: 2.4.x
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Platform: 64bit
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OS/Version: UNIX Other
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Status: NEW
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Severity: Normal
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Priority: P5 - None
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Component: System
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AssignedTo: <A HREF="http://lists.ximian.com/mailman/listinfo/mono-bugs">mono-bugs at lists.ximian.com</A>
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ReportedBy: <A HREF="http://lists.ximian.com/mailman/listinfo/mono-bugs">graham.wagener at gmail.com</A>
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QAContact: <A HREF="http://lists.ximian.com/mailman/listinfo/mono-bugs">mono-bugs at lists.ximian.com</A>
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Found By: ---
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Blocker: ---
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User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US)
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AppleWebKit/533.4 (KHTML, like Gecko) Chrome/5.0.375.86 Safari/533.4
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I get the following exception and truncated stack trace when calling
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ConvertTimeFromUtc with destinationTimeZone of "US/Hawaii".
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TimeZoneInfo hawaiiTZI = TimeZoneInfo.FindSystemTimeZoneById("US/Hawaii");
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DateTime gmt = new DateTime(...);
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DateTime local = TimeZoneInfo(gmt, hawaiiTZI);
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Unhandled Exception: System.NullReferenceException: Object reference not set to
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an instance of an object
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at System.TimeZoneInfo.GetApplicableRule (DateTime dateTime) [0x00000]
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at System.TimeZoneInfo.ConvertTimeFromUtc (DateTime dateTime) [0x00000]
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at System.TimeZoneInfo.ConvertTimeFromUtc (DateTime dateTime,
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System.TimeZoneInfo destinationTimeZone) [0x00000]
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Hawaii does not observe Daylight Savings Time so hawaiiTZI.GetAdjustmentRules()
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returns an empty array or possibly null, which presumably leads to the NRE in
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GetApplicableRule.
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A workaround and example of related code that does work is using GetUtcOffset.
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On Windows under .NET the following returns the same value as
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ConvertTimeFromUtc and does not throw an exception in mono:
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DateTime local = gmt + hawaiiTZI.GetUtcOffset(gmt);
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Reproducible: Always
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Steps to Reproduce:
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see code in description
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Actual Results:
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exception
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Expected Results:
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no exception
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--
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Configure bugmail: <A HREF="http://bugzilla.novell.com/userprefs.cgi?tab=email">http://bugzilla.novell.com/userprefs.cgi?tab=email</A>
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------- You are receiving this mail because: -------
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You are the QA contact for the bug.
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You are the assignee for the bug.
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</PRE>
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