Triple Exclamation Causes Stuck Uploading on Mega 2560 [imported]

[cmaglie]

This is Issue 459 moved from a Google Code project.
Added by 2011-01-11T03:26:07.000Z by drdsn...@gmail.com.
Please review that bug for more context and additional comments, but update this bug.
Closed (Duplicate).

Original labels: Type-Defect, Priority-Medium

Original description

What steps will reproduce the problem?

1. Add following line to a simple serial example:
   Serial.Println( "This will not upload!!!" );
2. Attempt to upload to an Arduino Mega 2560.
3. Wait until avrdude times out.

What is the expected output? What do you see instead?
Expected that the sketch will upload and Serial Monitor will display the text at some point. Instead the IDE sits for an extended period and usually declares a timeout from avrdude.

What version of the Arduino software are you using? On what operating
system? Which Arduino board are you using?
This has been replicated with the following:
Arduino Mega 2560 with Arduino IDE 0022 on a Windows 7 64bit.
Second Arduino Mega 2560 with Arduino IDE 0022 on OSX.
Third Arduino Mega 2560 with Arduino IDE 0021 on Ubuntu 10.04 64bit.

Please provide any additional information below.
It appears to be specific to the "!!!" included in the code sample above. 2 Exclamation marks do not have a problem. 3 or more cause this problem with what appears to be Mega 2560s only.

The problem could NOT be replicated with:
Arduino Duemilanove with Unknown IDE Version on a Windows 7 64bit.
Arduino Uno with Unknown IDE Version on an Unknown OS.

This has 2 forum postings associated with it (sorry):
http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1294452951/0#0
http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1294536128/0#0

[matthijskooijman]

For reference, this was a duplicate of #392.