FULL PRODUCT VERSION :
$ java -version
java version "1.7.0_45"
Java(TM) SE Runtime Environment (build 1.7.0_45-b18)
Java HotSpot(TM) 64-Bit Server VM (build 24.45-b08, mixed mode)
$ javac -version
javac 1.7.0_45


ADDITIONAL OS VERSION INFORMATION :
Darwin foobar 12.5.0 Darwin Kernel Version 12.5.0: Sun Sep 29 13:33:47 PDT 2013; root:xnu-2050.48.12~1/RELEASE_X86_64 x86_64


A DESCRIPTION OF THE PROBLEM :
javac crashes with this assertion failure:

An exception has occurred in the compiler (1.7.0_45). Please file a bug at the Java Developer Connection (http://java.sun.com/webapps/bugreport) after checking the Bug Parade for duplicates. Include your program and the following diagnostic in your report. Thank you.
java.lang.AssertionError: Missing type variable in where clause E
at com.sun.tools.javac.util.RichDiagnosticFormatter.unique(RichDiagnosticFormatter.java:234)
at com.sun.tools.javac.util.RichDiagnosticFormatter.access$100(RichDiagnosticFormatter.java:67)
at com.sun.tools.javac.util.RichDiagnosticFormatter$RichPrinter.visitTypeVar(RichDiagnosticFormatter.java:384)
at com.sun.tools.javac.util.RichDiagnosticFormatter$RichPrinter.visitTypeVar(RichDiagnosticFormatter.java:326)
at com.sun.tools.javac.code.Type$TypeVar.accept(Type.java:1030)
at com.sun.tools.javac.code.Printer.visit(Printer.java:131)
at com.sun.tools.javac.code.Printer.visitTypes(Printer.java:103)
at com.sun.tools.javac.code.Printer.visitClassType(Printer.java:194)
at com.sun.tools.javac.util.RichDiagnosticFormatter$RichPrinter.visitClassType(RichDiagnosticFormatter.java:366)
at com.sun.tools.javac.util.RichDiagnosticFormatter$RichPrinter.visitClassType(RichDiagnosticFormatter.java:326)
at com.sun.tools.javac.code.Type$ClassType.accept(Type.java:583)
at com.sun.tools.javac.code.Printer.visit(Printer.java:131)
at com.sun.tools.javac.code.Printer.className(Printer.java:265)
at com.sun.tools.javac.util.RichDiagnosticFormatter$RichPrinter.className(RichDiagnosticFormatter.java:374)
at com.sun.tools.javac.code.Printer.visitClassType(Printer.java:190)
at com.sun.tools.javac.util.RichDiagnosticFormatter$RichPrinter.visitClassType(RichDiagnosticFormatter.java:366)
at com.sun.tools.javac.util.RichDiagnosticFormatter$RichPrinter.visitClassType(RichDiagnosticFormatter.java:326)
at com.sun.tools.javac.code.Type$ClassType.accept(Type.java:583)
at com.sun.tools.javac.code.Printer.visit(Printer.java:131)
at com.sun.tools.javac.util.AbstractDiagnosticFormatter.formatArgument(AbstractDiagnosticFormatter.java:187)
at com.sun.tools.javac.util.AbstractDiagnosticFormatter.formatIterable(AbstractDiagnosticFormatter.java:216)
at com.sun.tools.javac.util.AbstractDiagnosticFormatter.formatArgument(AbstractDiagnosticFormatter.java:184)
at com.sun.tools.javac.util.AbstractDiagnosticFormatter.formatArguments(AbstractDiagnosticFormatter.java:158)
at com.sun.tools.javac.util.BasicDiagnosticFormatter.formatMessage(BasicDiagnosticFormatter.java:111)
at com.sun.tools.javac.util.BasicDiagnosticFormatter.formatMeta(BasicDiagnosticFormatter.java:184)
at com.sun.tools.javac.util.BasicDiagnosticFormatter.formatDiagnostic(BasicDiagnosticFormatter.java:100)
at com.sun.tools.javac.util.AbstractDiagnosticFormatter.format(AbstractDiagnosticFormatter.java:114)
at com.sun.tools.javac.util.RichDiagnosticFormatter.format(RichDiagnosticFormatter.java:112)
at com.sun.tools.javac.util.RichDiagnosticFormatter.format(RichDiagnosticFormatter.java:67)
at com.sun.tools.javac.util.Log.writeDiagnostic(Log.java:434)
at com.sun.tools.javac.util.Log.report(Log.java:416)
at com.sun.tools.javac.comp.Resolve.logResolveError(Resolve.java:1828)
at com.sun.tools.javac.comp.Resolve.access(Resolve.java:1296)
at com.sun.tools.javac.comp.Resolve.resolveQualifiedMethod(Resolve.java:1481)
at com.sun.tools.javac.comp.Attr.selectSym(Attr.java:2398)
at com.sun.tools.javac.comp.Attr.visitSelect(Attr.java:2283)
at com.sun.tools.javac.tree.JCTree$JCFieldAccess.accept(JCTree.java:1677)
at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:431)
at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:418)
at com.sun.tools.javac.comp.Attr.attribExpr(Attr.java:449)
at com.sun.tools.javac.comp.Attr.visitApply(Attr.java:1521)
at com.sun.tools.javac.tree.JCTree$JCMethodInvocation.accept(JCTree.java:1321)
at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:431)
at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:418)
at com.sun.tools.javac.comp.Attr.attribExpr(Attr.java:460)
at com.sun.tools.javac.comp.Attr.visitExec(Attr.java:1294)
at com.sun.tools.javac.tree.JCTree$JCExpressionStatement.accept(JCTree.java:1167)
at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:431)
at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:418)
at com.sun.tools.javac.comp.Attr.attribStat(Attr.java:480)
at com.sun.tools.javac.comp.Attr.attribStats(Attr.java:496)
at com.sun.tools.javac.comp.Attr.visitBlock(Attr.java:918)
at com.sun.tools.javac.tree.JCTree$JCBlock.accept(JCTree.java:781)
at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:431)
at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:418)
at com.sun.tools.javac.comp.Attr.attribStat(Attr.java:480)
at com.sun.tools.javac.comp.Attr.visitMethodDef(Attr.java:836)
at com.sun.tools.javac.tree.JCTree$JCMethodDecl.accept(JCTree.java:669)
at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:431)
at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:418)
at com.sun.tools.javac.comp.Attr.attribStat(Attr.java:480)
at com.sun.tools.javac.comp.Attr.attribClassBody(Attr.java:3250)
at com.sun.tools.javac.comp.Attr.attribClass(Attr.java:3173)
at com.sun.tools.javac.comp.Attr.attribClass(Attr.java:3109)
at com.sun.tools.javac.comp.Attr.attrib(Attr.java:3083)
at com.sun.tools.javac.main.JavaCompiler.attribute(JavaCompiler.java:1184)
at com.sun.tools.javac.main.JavaCompiler.compile2(JavaCompiler.java:870)
at com.sun.tools.javac.main.JavaCompiler.compile(JavaCompiler.java:829)
at com.sun.tools.javac.main.Main.compile(Main.java:439)
at com.sun.tools.javac.main.Main.compile(Main.java:353)
at com.sun.tools.javac.main.Main.compile(Main.java:342)
at com.sun.tools.javac.main.Main.compile(Main.java:333)
at com.sun.tools.javac.Main.compile(Main.java:76)
at com.sun.tools.javac.Main.main(Main.java:61)


STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Get Google Guava 15.0 JAR.

Then compile this program:

  $ javac -cp guava-15.0.jar bug.java

import com.google.common.reflect.*;
public class bug {
    <E> void foo() {
        new TypeResolver().where(new TypeParameter<E>(){}, null);
    }
}


EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
success, or at least a normal compiler error
ACTUAL -
assertion failure

ERROR MESSAGES/STACK TRACES THAT OCCUR :
An exception has occurred in the compiler (1.7.0_45). Please file a bug at the Java Developer Connection (http://java.sun.com/webapps/bugreport) after checking the Bug Parade for duplicates. Include your program and the following diagnostic in your report. Thank you.
java.lang.AssertionError: Missing type variable in where clause E
at com.sun.tools.javac.util.RichDiagnosticFormatter.unique(RichDiagnosticFormatter.java:234)
at com.sun.tools.javac.util.RichDiagnosticFormatter.access$100(RichDiagnosticFormatter.java:67)
at com.sun.tools.javac.util.RichDiagnosticFormatter$RichPrinter.visitTypeVar(RichDiagnosticFormatter.java:384)
at com.sun.tools.javac.util.RichDiagnosticFormatter$RichPrinter.visitTypeVar(RichDiagnosticFormatter.java:326)
at com.sun.tools.javac.code.Type$TypeVar.accept(Type.java:1030)
at com.sun.tools.javac.code.Printer.visit(Printer.java:131)
at com.sun.tools.javac.code.Printer.visitTypes(Printer.java:103)
at com.sun.tools.javac.code.Printer.visitClassType(Printer.java:194)
at com.sun.tools.javac.util.RichDiagnosticFormatter$RichPrinter.visitClassType(RichDiagnosticFormatter.java:366)
at com.sun.tools.javac.util.RichDiagnosticFormatter$RichPrinter.visitClassType(RichDiagnosticFormatter.java:326)
at com.sun.tools.javac.code.Type$ClassType.accept(Type.java:583)
at com.sun.tools.javac.code.Printer.visit(Printer.java:131)
at com.sun.tools.javac.code.Printer.className(Printer.java:265)
at com.sun.tools.javac.util.RichDiagnosticFormatter$RichPrinter.className(RichDiagnosticFormatter.java:374)
at com.sun.tools.javac.code.Printer.visitClassType(Printer.java:190)
at com.sun.tools.javac.util.RichDiagnosticFormatter$RichPrinter.visitClassType(RichDiagnosticFormatter.java:366)
at com.sun.tools.javac.util.RichDiagnosticFormatter$RichPrinter.visitClassType(RichDiagnosticFormatter.java:326)
at com.sun.tools.javac.code.Type$ClassType.accept(Type.java:583)
at com.sun.tools.javac.code.Printer.visit(Printer.java:131)
at com.sun.tools.javac.util.AbstractDiagnosticFormatter.formatArgument(AbstractDiagnosticFormatter.java:187)
at com.sun.tools.javac.util.AbstractDiagnosticFormatter.formatIterable(AbstractDiagnosticFormatter.java:216)
at com.sun.tools.javac.util.AbstractDiagnosticFormatter.formatArgument(AbstractDiagnosticFormatter.java:184)
at com.sun.tools.javac.util.AbstractDiagnosticFormatter.formatArguments(AbstractDiagnosticFormatter.java:158)
at com.sun.tools.javac.util.BasicDiagnosticFormatter.formatMessage(BasicDiagnosticFormatter.java:111)
at com.sun.tools.javac.util.BasicDiagnosticFormatter.formatMeta(BasicDiagnosticFormatter.java:184)
at com.sun.tools.javac.util.BasicDiagnosticFormatter.formatDiagnostic(BasicDiagnosticFormatter.java:100)
at com.sun.tools.javac.util.AbstractDiagnosticFormatter.format(AbstractDiagnosticFormatter.java:114)
at com.sun.tools.javac.util.RichDiagnosticFormatter.format(RichDiagnosticFormatter.java:112)
at com.sun.tools.javac.util.RichDiagnosticFormatter.format(RichDiagnosticFormatter.java:67)
at com.sun.tools.javac.util.Log.writeDiagnostic(Log.java:434)
at com.sun.tools.javac.util.Log.report(Log.java:416)
at com.sun.tools.javac.comp.Resolve.logResolveError(Resolve.java:1828)
at com.sun.tools.javac.comp.Resolve.access(Resolve.java:1296)
at com.sun.tools.javac.comp.Resolve.resolveQualifiedMethod(Resolve.java:1481)
at com.sun.tools.javac.comp.Attr.selectSym(Attr.java:2398)
at com.sun.tools.javac.comp.Attr.visitSelect(Attr.java:2283)
at com.sun.tools.javac.tree.JCTree$JCFieldAccess.accept(JCTree.java:1677)
at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:431)
at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:418)
at com.sun.tools.javac.comp.Attr.attribExpr(Attr.java:449)
at com.sun.tools.javac.comp.Attr.visitApply(Attr.java:1521)
at com.sun.tools.javac.tree.JCTree$JCMethodInvocation.accept(JCTree.java:1321)
at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:431)
at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:418)
at com.sun.tools.javac.comp.Attr.attribExpr(Attr.java:460)
at com.sun.tools.javac.comp.Attr.visitExec(Attr.java:1294)
at com.sun.tools.javac.tree.JCTree$JCExpressionStatement.accept(JCTree.java:1167)
at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:431)
at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:418)
at com.sun.tools.javac.comp.Attr.attribStat(Attr.java:480)
at com.sun.tools.javac.comp.Attr.attribStats(Attr.java:496)
at com.sun.tools.javac.comp.Attr.visitBlock(Attr.java:918)
at com.sun.tools.javac.tree.JCTree$JCBlock.accept(JCTree.java:781)
at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:431)
at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:418)
at com.sun.tools.javac.comp.Attr.attribStat(Attr.java:480)
at com.sun.tools.javac.comp.Attr.visitMethodDef(Attr.java:836)
at com.sun.tools.javac.tree.JCTree$JCMethodDecl.accept(JCTree.java:669)
at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:431)
at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:418)
at com.sun.tools.javac.comp.Attr.attribStat(Attr.java:480)
at com.sun.tools.javac.comp.Attr.attribClassBody(Attr.java:3250)
at com.sun.tools.javac.comp.Attr.attribClass(Attr.java:3173)
at com.sun.tools.javac.comp.Attr.attribClass(Attr.java:3109)
at com.sun.tools.javac.comp.Attr.attrib(Attr.java:3083)
at com.sun.tools.javac.main.JavaCompiler.attribute(JavaCompiler.java:1184)
at com.sun.tools.javac.main.JavaCompiler.compile2(JavaCompiler.java:870)
at com.sun.tools.javac.main.JavaCompiler.compile(JavaCompiler.java:829)
at com.sun.tools.javac.main.Main.compile(Main.java:439)
at com.sun.tools.javac.main.Main.compile(Main.java:353)
at com.sun.tools.javac.main.Main.compile(Main.java:342)
at com.sun.tools.javac.main.Main.compile(Main.java:333)
at com.sun.tools.javac.Main.compile(Main.java:76)
at com.sun.tools.javac.Main.main(Main.java:61)


REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------

import com.google.common.reflect.*;
public class bug {
    <E> void foo() {
        new TypeResolver().where(new TypeParameter<E>(){}, null);
    }
}

---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
Unknown