Proper error message should be thrown when the jdk/ jre installation is not successful

Tested OS : Solaris
Tested Build : mustang b75

Tried installing the jre using file based installer (jre-6-beta2-solaris-sparc.sh)
into /tmp folder

The following happened :

Do you agree to the above license terms? [yes or no]
yes
Unpacking...
Checksumming...
Extracting...
.
.
.
.
linking: jre1.6.0/javaws/javaws -> ../bin/javaws
Creating jre1.6.0/lib/rt.jar
Error: write on output file failed err=28
Creating jre1.6.0/lib/jsse.jar
Creating jre1.6.0/lib/charsets.jar
Creating jre1.6.0/lib/ext/localedata.jar
Creating jre1.6.0/lib/plugin.jar
Creating jre1.6.0/lib/javaws.jar
Creating jre1.6.0/lib/deploy.jar
 
Done.

rohit:/tmp/malathi/jre1.6.0/bin 170 % ./java -version
Error occurred during initialization of VM
java/lang/ClassNotFoundException: error in opening JAR file /tmp/malathi/jre1.6.0/lib/rt.jar

Expected Behavior :
When the jdk / jre installation is not successful, proper error message should be thrown at the end of the installation.