#795 Internal compiler error when missing closing curly brace
I'm an educator. To get the students used to interpreting the compiler error messages, one of our labs involves introducing errors into a simple compilable piece of code. The first error that is introduced is the removal of the final closing curly brace in the class. With release 20080904-r4668 and earlier, the expected compiler message appears about an incomplete class declaration:
Error message: reached end of file while parsing
Error: The class code is incomplete
With the current release, 20090821-r5004, the error is an internal compiler error, that leads me to submit this bug report:
1 error occured! Please submit a bug report containing the information below and an account of the actions that caused the bug (if known) to http://sourceforge.net/projects/drjava. You may wish to save all your work and restart DrJava. Thanks for your help in making DrJava better!
edu.rice.cs.util.UnexpectedException: java.lang.RuntimeException: edu.rice.cs.util.UnexpectedException: java.lang.RuntimeException: Compile exception: com.sun.tools.javac.util.ClientCodeException: edu.rice.cs.util.UnexpectedException: java.lang.RuntimeException: C:\teaching\assign\CompilerErrors.java:21: reached end of file while parsing
at edu.rice.cs.drjava.model.DJError.<init>(DJError.java:72)
at edu.rice.cs.drjava.model.DJError.<init>(DJError.java:82)
at edu.rice.cs.drjava.model.DJError.<init>(DJError.java:87)
at edu.rice.cs.drjava.model.compiler.DefaultCompilerModel._doCompile(DefaultCompilerModel.java:253)
at edu.rice.cs.drjava.model.compiler.DefaultCompilerModel.compileAll(DefaultCompilerModel.java:150)
at edu.rice.cs.drjava.ui.MainFrame._compileAll(MainFrame.java:5396)
at edu.rice.cs.drjava.ui.MainFrame.access$4800(MainFrame.java:117)
at edu.rice.cs.drjava.ui.MainFrame$51.actionPerformed(MainFrame.java:829)
at javax.swing.SwingUtilities.notifyAction(Unknown Source)
at edu.rice.cs.drjava.ui.DefinitionsPane.processKeyEvent(DefinitionsPane.java:605)
at java.awt.Component.processEvent(Unknown Source)
at java.awt.Container.processEvent(Unknown Source)
at java.awt.Component.dispatchEventImpl(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.KeyboardFocusManager.redispatchEvent(Unknown Source)
at java.awt.DefaultKeyboardFocusManager.dispatchKeyEvent(Unknown Source)
at java.awt.DefaultKeyboardFocusManager.preDispatchKeyEvent(Unknown Source)
at java.awt.DefaultKeyboardFocusManager.typeAheadAssertions(Unknown Source)
at java.awt.DefaultKeyboardFocusManager.dispatchEvent(Unknown Source)
at java.awt.Component.dispatchEventImpl(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Window.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.run(Unknown Source)
Caused by: java.lang.RuntimeException: edu.rice.cs.util.UnexpectedException: java.lang.RuntimeException: Compile exception: com.sun.tools.javac.util.ClientCodeException: edu.rice.cs.util.UnexpectedException: java.lang.RuntimeException: C:\teaching\assign\CompilerErrors.java:21: reached end of file while parsing
at edu.rice.cs.util.UnexpectedException.<init>(UnexpectedException.java:71)
... 31 more
Caused by:
java.lang.RuntimeException: edu.rice.cs.util.UnexpectedException: java.lang.RuntimeException: Compile exception: com.sun.tools.javac.util.ClientCodeException: edu.rice.cs.util.UnexpectedException: java.lang.RuntimeException: C:\teaching\assign\CompilerErrors.java:21: reached end of file while parsing
at edu.rice.cs.util.UnexpectedException.<init>(UnexpectedException.java:71)
at edu.rice.cs.drjava.model.DJError.<init>(DJError.java:72)
at edu.rice.cs.drjava.model.DJError.<init>(DJError.java:82)
at edu.rice.cs.drjava.model.DJError.<init>(DJError.java:87)
at edu.rice.cs.drjava.model.compiler.DefaultCompilerModel._doCompile(DefaultCompilerModel.java:253)
at edu.rice.cs.drjava.model.compiler.DefaultCompilerModel.compileAll(DefaultCompilerModel.java:150)
at edu.rice.cs.drjava.ui.MainFrame._compileAll(MainFrame.java:5396)
at edu.rice.cs.drjava.ui.MainFrame.access$4800(MainFrame.java:117)
at edu.rice.cs.drjava.ui.MainFrame$51.actionPerformed(MainFrame.java:829)
at javax.swing.SwingUtilities.notifyAction(Unknown Source)
at edu.rice.cs.drjava.ui.DefinitionsPane.processKeyEvent(DefinitionsPane.java:605)
at java.awt.Component.processEvent(Unknown Source)
at java.awt.Container.processEvent(Unknown Source)
at java.awt.Component.dispatchEventImpl(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.KeyboardFocusManager.redispatchEvent(Unknown Source)
at java.awt.DefaultKeyboardFocusManager.dispatchKeyEvent(Unknown Source)
at java.awt.DefaultKeyboardFocusManager.preDispatchKeyEvent(Unknown Source)
at java.awt.DefaultKeyboardFocusManager.typeAheadAssertions(Unknown Source)
at java.awt.DefaultKeyboardFocusManager.dispatchEvent(Unknown Source)
at java.awt.Component.dispatchEventImpl(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Window.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.run(Unknown Source)
System Properties:
DrJava Version drjava-20090821-r5004
DrJava Build Time 20090821-1520
drjava.debug.port = 2290
java.runtime.name = Java(TM) SE Runtime Environment
sun.boot.library.path = C:\Program Files\Java\jre6\bin
java.vm.version = 14.2-b01
java.vm.vendor = Sun Microsystems Inc.
java.vendor.url = http://java.sun.com/
path.separator = ;
java.vm.name = Java HotSpot(TM) Client VM
file.encoding.pkg = sun.io
sun.java.launcher = SUN_STANDARD
user.country = US
sun.os.patch.level = Service Pack 3
java.vm.specification.name = Java Virtual Machine Specification
user.dir = <anonymized user.dir>
java.runtime.version = 1.6.0_16-b01
java.awt.graphicsenv = sun.awt.Win32GraphicsEnvironment
java.endorsed.dirs = C:\Program Files\Java\jre6\lib\endorsed
os.arch = x86
java.io.tmpdir = C:\DOCUME~1\<anonymized user.name>\LOCALS~1\Temp\
line.separator = "\u000d\u000a"
java.vm.specification.vendor = Sun Microsystems Inc.
user.variant =
os.name = Windows XP
sun.jnu.encoding = Cp1252
java.library.path = C:\Program Files\Java\jre6\bin;.;C:\WINDOWS\Sun\Java\bin;C:\WINDOWS\system32;C:\WINDOWS;C:\Program Files\MiKTeX 2.7\miktex\bin;C:\Python26\;C:\Perl\site\bin;C:\Perl\bin;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\system32\wbem;C:\Program Files\MATLAB\R2007a Student\bin;C:\Program Files\MATLAB\R2007a Student\bin\win32;C:\Program Files\Common Files\DivX Shared\;C:\Program Files\QuickTime\QTSystem\;C:\Program Files\Java\jre6\bin
java.specification.name = Java Platform API Specification
java.class.version = 50.0
sun.management.compiler = HotSpot Client Compiler
os.version = 5.1
user.home = <anonymized user.home>
user.timezone = America/Los_Angeles
java.awt.printerjob = sun.awt.windows.WPrinterJob
file.encoding = Cp1252
java.specification.version = 1.6
java.class.path = <anonymized user.dir>\drjava-stable-20090821-r5004.exe
user.name = <anonymized user.name>
java.vm.specification.version = 1.0
java.home = C:\Program Files\Java\jre6
sun.arch.data.model = 32
user.language = en
java.specification.vendor = Sun Microsystems Inc.
awt.toolkit = sun.awt.windows.WToolkit
java.vm.info = mixed mode, sharing
java.version = 1.6.0_16
java.ext.dirs = C:\Program Files\Java\jre6\lib\ext;C:\WINDOWS\Sun\Java\lib\ext
sun.boot.class.path = C:\Program Files\Java\jre6\lib\resources.jar;C:\Program Files\Java\jre6\lib\rt.jar;C:\Program Files\Java\jre6\lib\sunrsasign.jar;C:\Program Files\Java\jre6\lib\jsse.jar;C:\Program Files\Java\jre6\lib\jce.jar;C:\Program Files\Java\jre6\lib\charsets.jar;C:\Program Files\Java\jre6\classes
java.vendor = Sun Microsystems Inc.
file.separator = \
java.vendor.url.bug = http://java.sun.com/cgi-bin/bugreport.cgi
sun.io.unicode.encoding = UnicodeLittle
sun.cpu.endian = little
java.rmi.server.hostname = 127.0.0.1
sun.desktop = windows
sun.cpu.isalist = pentium_pro+mmx pentium_pro pentium+mmx pentium i486 i386 i86
#DrJava configuration file
#Sun Oct 04 23:07:09 PDT 2009
extra.classpath = C:\\teaching\\csc142\\NsccLibrary.jar
lineenum.enabled = true
key.delete.next = [shift DELETE]
key.delete.previous = [shift BACK_SPACE]
recent.files = [C:\\teaching\\assign\\CompilerErrors.java,C:\\teaching\\csc142-m09\\Flag.java,C:\\teaching\\assign\\Snowman.java,C:\\teaching\\assign\\Point.java,C:\\teaching\\assign\\Token.java]
window.height = 570
window.x = 224
window.y = 0
last.dir = C:\\teaching\\assign\\CompilerErrors.java
last.interactions.dir = C:\\teaching\\assign
tabbedpanes.state = 512 300 700 400
dialog.drjava.survey.enabled = false
new.version.notification.last = 1254626925719
drjava.survey.notification.last = 1250275888187
drjava.survey.result.last = http://www.drjava.org/submit-usage.php?rev=4668&os.name=Windows%20XP&os.version=5.1&java.version=1.6.0_15&java.vendor=Sun%20Microsystems%20Inc.
Used memory: about 18.97 megabytes
Free memory: about 9.44 megabytes
Total memory: about 28.42 megabytes
Total memory can expand to: about 63.56 megabytes
Number of processors/cores: 2
This is the file that caused the error shown.
I was able to reproduce this: It only happens with Java 6 compilers.
This is due to a very clumsy collusion of circumstances:
We use a string comparison to determine if an internal compiler error has occurred. This is done by checking whether the compiler error message contains the string "CompilerError".
By naming the file CompilerErrors.java, a false positive is created.
In the Java 5 compiler, this kind of error was not thrown as an exception, so the issue did not come up.
Fixed as of revision 5105. I will later make a new jar available.
I made a new jar available on our "Weekly Jar" website ( http://www.cs.rice.edu/~javaplt/drjavarice/weekly/ )
The direct link is http://www.cs.rice.edu/~javaplt/drjavarice/weekly/files/drjava-weekly-20091006-r5105.jar