Bug 6404 - System.Text.Encoder throws ArgumentOutOfRangeException when it should not
Summary: System.Text.Encoder throws ArgumentOutOfRangeException when it should not
Status: RESOLVED FIXED
Alias: None
Product: Class Libraries
Classification: Mono
Component: mscorlib ()
Version: master
Hardware: Macintosh Mac OS
: --- normal
Target Milestone: Untriaged
Assignee: Bugzilla
URL:
Depends on:
Blocks:
 
Reported: 2012-08-06 00:13 UTC by Martin Potter
Modified: 2012-08-09 05:14 UTC (History)
2 users (show)

Tags:
Is this bug a regression?: ---
Last known good build:

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Status:
RESOLVED FIXED

Description Martin Potter 2012-08-06 00:13:44 UTC
According to the documentation at http://msdn.microsoft.com/en-us/library/dh0797c4.aspx, System.Text.Encoder throws ArgumentOutOfRangeExceptions when it should not. From the documentation, an ArgumentOutOfRangeException should be thrown when:

charIndex, charCount, byteIndex, or byteCount is less than zero.
-or-
The length of chars - charIndex is less than charCount.
-or-
The length of bytes - byteIndex is less than byteCount.

To reproduce, run the following code:

int charsUsed, bytesUsed;
bool completed;
byte [] bytes = new byte [0];

Encoding.UTF8.GetEncoder ().Convert (new char[0], 0, 0, bytes, 0, bytes.Length, true, out charsUsed, out bytesUsed, out completed);


Expected:

The code runs, charsUsed equals zero, bytesUsed equals zero and completed is true.

Actual:

Mono throws an ArgumentOutOfRangeException for charIndex.
Comment 1 Martin Potter 2012-08-06 00:17:08 UTC
Submitted pull request with fix, https://github.com/mono/mono/pull/419