Assertion failed: t- numPointers == 0, ....

Question

I develop software on true64 Unix 5.0 and use JDK1.3.1 beta 2 (Fast VM) , I found exception like this
Assertion failed: t->numPointers == 0, file ../../../src/share/native/sun/awt/font/t2k/tsimem.c, line 92
exception system: exiting due to multiple internal errors:
exception dispatch or unwind stuck in infinite loop
exception dispatch or unwind stuck in infinite loop
Had anyone ever met this exception before , what is it wrong , and how can i solve it ?

Answer 1

Hi -
We also came across this problem. It seems to be related to using anti aliased text in a drawString() call. Interestingly it happens on the second call using a particular font.
Test case code is pasted below, which will crash the JVM on the second run through the main loop - i.e. the second time iterating through all the fonts.
This code was cannibalised from another example posted here a while ago.
Chris Davey
===========
import java.awt.*;
import java.awt.font.*;
import java.awt.image.*;
class Test {
public static void main(String[] argv) {
FontMetrics fm = null;
String strings [] ={""," "," ","a","test string"};
int iaBITypes [] = {BufferedImage.TYPE_3BYTE_BGR ,BufferedImage.TYPE_4BYTE_ABGR ,
                            BufferedImage.TYPE_4BYTE_ABGR_PRE ,BufferedImage.TYPE_BYTE_BINARY ,
                            BufferedImage.TYPE_BYTE_GRAY ,BufferedImage.TYPE_BYTE_INDEXED ,
                            BufferedImage.TYPE_INT_ARGB ,BufferedImage.TYPE_INT_ARGB_PRE ,
                            BufferedImage.TYPE_INT_BGR ,BufferedImage.TYPE_INT_RGB ,
                            BufferedImage.TYPE_USHORT_555_RGB ,BufferedImage.TYPE_USHORT_565_RGB ,
                            BufferedImage.TYPE_USHORT_GRAY };
Toolkit t = Toolkit.getDefaultToolkit();
System.out.println("hi");
for (int idx = 0; idx < 100; idx++){
Font fonts [] = GraphicsEnvironment.getLocalGraphicsEnvironment().getAllFonts();
for (int ff=0;ff<fonts.length;ff++) {  // Try all fonts
for (int iBIType = 0; iBIType < iaBITypes.length; iBIType++){
BufferedImage bi = new BufferedImage(1000,1000,iaBITypes[iBIType]);
Graphics2D g= (Graphics2D) bi.getGraphics();
//FontRenderContext frc = g.getFontRenderContext();
//XXX Problem Here - if
//2nd Param (anti - aliasing ) is TRUE, then This
//will crash on True 64 Unix - with either Sun or
//Compaq JVM, on 2nd pass through
FontRenderContext frc2 = new FontRenderContext(null,true,false);
//TextLayout tl = new TextLayout("test-string",fonts[ff],frc);
TextLayout tl2 = new TextLayout("test-string",fonts[ff],frc2);
g.setFont(fonts[ff]);
for (float a = -1000; a < 2000; a+=200)
g.drawString("test",a,a);
System.out.println("dumping threads: " );
Thread ath[] = new Thread[512];
Thread.currentThread().enumerate(ath);
for (int i=0; i < ath.length; i++){
if (ath[i] != null)
System.out.println("\tThread: " + i + " " + ath);
Keywords: Tru64 tsimem.c assert true64 crash