NullPointerException when device on selected COM port does not return a name

logan893 · August 27, 2015, 5:13pm

Not sure if this is the correct forum for this, as it's more a bug report than a request for help.
I've also posted a bug report in github.

github.com/arduino/Arduino

LoadVIDPIDSpecificPreferences fails when connected board returns no string text

opened 05:12PM - 27 Aug 15 UTC

closed 07:02AM - 28 Aug 15 UTC

logan893

Component: IDE Type: Bug

I'm receiving the following error with the newly downloaded Arduino IDE 1.6.5-r4…, when compiling any sketch. java.lang.NullPointerException at cc.arduino.LoadVIDPIDSpecificPreferences.load(LoadVIDPIDSpecificPreferences.java:48) at processing.app.debug.Compiler.createBuildPreferences(Compiler.java:592) at processing.app.debug.Compiler.<init>(Compiler.java:193) at processing.app.debug.Compiler.build(Compiler.java:96) at processing.app.Sketch.build(Sketch.java:1109) at processing.app.Sketch.build(Sketch.java:1084) at processing.app.Editor$BuildHandler.run(Editor.java:1955) at java.lang.Thread.run(Thread.java:745) I need to have my Arduino Pro Mini board (most likely a Chinese knock-off) connected via USB and have that COM port selected for this error to show up. The port shows up as e.g. COM4, with no additional parenthesis like my Arduino Uno which shows up as COM7 (Arduino Uno). Disconnecting this device (i.e. selecting none), or connecting and selecting my Arduino Uno, allows me to compile. Source file at fault: https://github.com/arduino/Arduino/blob/1.6.5-r4/arduino-core/src/cc/arduino/LoadVIDPIDSpecificPreferences.java This file is new as of 1.6.5-r4 Line 48: int VIDPIDIndex = findVIDPIDIndex(prefs, boardPort.getPrefs().get("vid").toUpperCase(), boardPort.getPrefs().get("pid").toUpperCase()); One, or likely both, of the boardPort.getPrefs().get(String) functions returns null, which throws this exception when calling .toUpperCase() on a null value (default return value from java.util.LinkedHashMap.get() when no match is found). Possible suggestion to fix this (you likely know better if this has any other side effects); use a default option for the get() function of PreferencesMap data structure. int VIDPIDIndex = findVIDPIDIndex(prefs, boardPort.getPrefs().get("vid","").toUpperCase(), boardPort.getPrefs().get("pid","").toUpperCase());

I'm receiving the following error with the newly downloaded Arduino IDE 1.6.5-r4, when compiling any sketch.

java.lang.NullPointerException
at cc.arduino.LoadVIDPIDSpecificPreferences.load(LoadVIDPIDSpecificPreferences.java:48)
at processing.app.debug.Compiler.createBuildPreferences(Compiler.java:592)
at processing.app.debug.Compiler.(Compiler.java:193)
at processing.app.debug.Compiler.build(Compiler.java:96)
at processing.app.Sketch.build(Sketch.java:1109)
at processing.app.Sketch.build(Sketch.java:1084)
at processing.app.Editor$BuildHandler.run(Editor.java:1955)
at java.lang.Thread.run(Thread.java:745)

I need to have my Arduino Pro Mini board (most likely a Chinese knock-off) connected via USB and have that COM port selected for this error to show up. The port shows up as e.g. COM4, with no additional parenthesis like my Arduino Uno which shows up as COM7 (Arduino Uno).

Disconnecting this device (i.e. selecting none), or connecting and selecting my Arduino Uno, allows me to compile.

Source file at fault:

github.com

arduino/Arduino/blob/1.6.5-r4/arduino-core/src/cc/arduino/LoadVIDPIDSpecificPreferences.java

/*
 * This file is part of Arduino.
 *
 * Copyright 2015 Arduino LLC (http://www.arduino.cc/)
 *
 * Arduino is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 *
 * As a special exception, you may use this file as part of a free software

This file has been truncated. show original

This file is new as of 1.6.5-r4

Line 48:
int VIDPIDIndex = findVIDPIDIndex(prefs, boardPort.getPrefs().get("vid").toUpperCase(), boardPort.getPrefs().get("pid").toUpperCase());

One, or likely both, of the boardPort.getPrefs().get(String) functions returns null, which throws this exception when calling .toUpperCase() on a null value (default return value from java.util.LinkedHashMap.get() when no match is found).

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NullPointerException when device on selected COM port does not return a name

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