IndexOutOfBounds on save and create new class

[dsyer]

Error occurs on save and (slightly different stack trace) when you try to create a new Java class file. The latter is a showstopper because it prevents the file from being created. This is from a fresh install of Eclipse 2020-06 plus the Spring plugin:

java.lang.IndexOutOfBoundsException: Index 32 out of bounds for length 32
	at java.base/jdk.internal.util.Preconditions.outOfBounds(Preconditions.java:64)
	at java.base/jdk.internal.util.Preconditions.outOfBoundsCheckIndex(Preconditions.java:70)
	at java.base/jdk.internal.util.Preconditions.checkIndex(Preconditions.java:248)
	at java.base/java.util.Objects.checkIndex(Objects.java:372)
	at java.base/java.util.ArrayList.get(ArrayList.java:458)
	at io.spring.javaformat.formatter.eclipse.TokenManager.get(TokenManager.java:75)
	at io.spring.javaformat.formatter.eclipse.TokenManager.findIndex(TokenManager.java:168)
	at io.spring.javaformat.formatter.eclipse.SpacePreparator.handleToken(SpacePreparator.java:1098)
	at io.spring.javaformat.formatter.eclipse.SpacePreparator.visit(SpacePreparator.java:178)
	at org.eclipse.jdt.core.dom.TypeDeclaration.accept0(TypeDeclaration.java:430)
	at org.eclipse.jdt.core.dom.ASTNode.accept(ASTNode.java:2971)
	at org.eclipse.jdt.core.dom.ASTNode.acceptChildren(ASTNode.java:3042)
	at org.eclipse.jdt.core.dom.CompilationUnit.accept0(CompilationUnit.java:258)
	at org.eclipse.jdt.core.dom.ASTNode.accept(ASTNode.java:2971)
	at io.spring.javaformat.formatter.eclipse.DefaultCodeFormatter.prepareSpaces(DefaultCodeFormatter.java:412)
	at io.spring.javaformat.formatter.eclipse.DefaultCodeFormatter.prepareFormattedCode(DefaultCodeFormatter.java:229)
	at io.spring.javaformat.formatter.eclipse.DefaultCodeFormatter.format(DefaultCodeFormatter.java:186)
	at io.spring.javaformat.formatter.eclipse.DefaultCodeFormatter.format(DefaultCodeFormatter.java:168)
	at io.spring.javaformat.formatter.Formatter.lambda$format$0(Formatter.java:102)
	at io.spring.javaformat.formatter.Formatter.nlsSafe(Formatter.java:149)
	at io.spring.javaformat.formatter.Formatter.format(Formatter.java:101)
	at io.spring.javaformat.eclipse.formatter.SpringCodeFormatter.format(SpringCodeFormatter.java:39)
	at org.eclipse.jdt.internal.corext.util.CodeFormatterUtil.reformat(CodeFormatterUtil.java:291)
	at org.eclipse.jdt.internal.corext.util.CodeFormatterUtil.reformat(CodeFormatterUtil.java:354)
	at org.eclipse.jdt.internal.corext.fix.CodeFormatFix.createCleanUp(CodeFormatFix.java:76)
	at org.eclipse.jdt.internal.ui.fix.CodeFormatCleanUp.createFix(CodeFormatCleanUp.java:64)
	at 
...

Installation details:

eclipse.buildId=4.16.0.I20200604-0540
java.version=11.0.7-internal
java.vendor=Oracle Corporation
BootLoader constants: OS=linux, ARCH=x86_64, WS=gtk, NL=en_US
Command-line arguments:  -data file:/home/dsyer/dev/eclipse/workspace/ -os linux -ws gtk -arch x86_64

[wilkinsona]

This is a duplicate of #204 and #203.