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FULL PRODUCT VERSION : java version "1.5.0" Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0-b64) Java HotSpot(TM) Client VM (build 1.5.0-b64, mixed mode, sharing) ADDITIONAL OS VERSION INFORMATION : Microsoft Windows XP [Version 5.1.2600] A DESCRIPTION OF THE PROBLEM : The compiler crashes when compiling this code: public class GenericsBug { static <T> void varargs(T...args){ for(T t : args) System.out.println(t); } public static void main(String[]args){ varargs(new int[]{1, 2, 3}, new int[]{4, 5, 6}); } } STEPS TO FOLLOW TO REPRODUCE THE PROBLEM : Just try to compile the code EXPECTED VERSUS ACTUAL BEHAVIOR : EXPECTED - Since the method: static <T> void varargs(T...args) should be translated by the compiler to: static void varargs(Object...args) and arrays are objects then this code should compile, otherwise the compiler should report an error, but not crash!! ACTUAL - An exception has occurred in the compiler (1.5.0). 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: unexpected type: <nulltype> at com.sun.tools.javac.tree.TreeMaker.Type(TreeMaker.java:531) at com.sun.tools.javac.tree.TreeMaker.Type(TreeMaker.java:525) at com.sun.tools.javac.comp.Lower.boxArgs(Lower.java:2529) at com.sun.tools.javac.comp.Lower.visitApply(Lower.java:2439) at com.sun.tools.javac.tree.Tree$Apply.accept(Tree.java:819) at com.sun.tools.javac.comp.Lower.translate(Lower.java:1893) at com.sun.tools.javac.tree.TreeTranslator.visitExec(TreeTranslator.java:227) at com.sun.tools.javac.tree.Tree$Exec.accept(Tree.java:734) at com.sun.tools.javac.comp.Lower.translate(Lower.java:1893) at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:54) at com.sun.tools.javac.tree.TreeTranslator.visitBlock(TreeTranslator.java:145) at com.sun.tools.javac.comp.Lower.visitBlock(Lower.java:2950) at com.sun.tools.javac.tree.Tree$Block.accept(Tree.java:540) at com.sun.tools.javac.comp.Lower.translate(Lower.java:1893) at com.sun.tools.javac.tree.TreeTranslator.visitMethodDef(TreeTranslator.java:129) at com.sun.tools.javac.comp.Lower.visitMethodDefInternal(Lower.java:2287) at com.sun.tools.javac.comp.Lower.visitMethodDef(Lower.java:2206) at com.sun.tools.javac.tree.Tree$MethodDef.accept(Tree.java:482) at com.sun.tools.javac.comp.Lower.translate(Lower.java:1893) at com.sun.tools.javac.comp.Lower.visitClassDef(Lower.java:2001) at com.sun.tools.javac.tree.Tree$ClassDef.accept(Tree.java:438) at com.sun.tools.javac.comp.Lower.translate(Lower.java:1893) at com.sun.tools.javac.comp.Lower.translate(Lower.java:1913) at com.sun.tools.javac.comp.Lower.translateTopLevelClass(Lower.java:3087) at com.sun.tools.javac.main.JavaCompiler.compile(JavaCompiler.java:462) at com.sun.tools.javac.main.Main.compile(Main.java:592) at com.sun.tools.javac.main.Main.compile(Main.java:544) at com.sun.tools.javac.Main.compile(Main.java:58) at com.sun.tools.javac.Main.main(Main.java:48) ERROR MESSAGES/STACK TRACES THAT OCCUR : An exception has occurred in the compiler (1.5.0). Please file a bug at the Java Developer Connection (http://java.sun.com/webapps/bugreport) after checking the Bug Parade for duplicates. Include your program and the following diagnostic in your report. Thank you. java.lang.AssertionError: unexpected type: <nulltype> at com.sun.tools.javac.tree.TreeMaker.Type(TreeMaker.java:531) at com.sun.tools.javac.tree.TreeMaker.Type(TreeMaker.java:525) at com.sun.tools.javac.comp.Lower.boxArgs(Lower.java:2529) at com.sun.tools.javac.comp.Lower.visitApply(Lower.java:2439) at com.sun.tools.javac.tree.Tree$Apply.accept(Tree.java:819) at com.sun.tools.javac.comp.Lower.translate(Lower.java:1893) at com.sun.tools.javac.tree.TreeTranslator.visitExec(TreeTranslator.java:227) at com.sun.tools.javac.tree.Tree$Exec.accept(Tree.java:734) at com.sun.tools.javac.comp.Lower.translate(Lower.java:1893) at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:54) at com.sun.tools.javac.tree.TreeTranslator.visitBlock(TreeTranslator.java:145) at com.sun.tools.javac.comp.Lower.visitBlock(Lower.java:2950) at com.sun.tools.javac.tree.Tree$Block.accept(Tree.java:540) at com.sun.tools.javac.comp.Lower.translate(Lower.java:1893) at com.sun.tools.javac.tree.TreeTranslator.visitMethodDef(TreeTranslator.java:129) at com.sun.tools.javac.comp.Lower.visitMethodDefInternal(Lower.java:2287) at com.sun.tools.javac.comp.Lower.visitMethodDef(Lower.java:2206) at com.sun.tools.javac.tree.Tree$MethodDef.accept(Tree.java:482) at com.sun.tools.javac.comp.Lower.translate(Lower.java:1893) at com.sun.tools.javac.comp.Lower.visitClassDef(Lower.java:2001) at com.sun.tools.javac.tree.Tree$ClassDef.accept(Tree.java:438) at com.sun.tools.javac.comp.Lower.translate(Lower.java:1893) at com.sun.tools.javac.comp.Lower.translate(Lower.java:1913) at com.sun.tools.javac.comp.Lower.translateTopLevelClass(Lower.java:3087) at com.sun.tools.javac.main.JavaCompiler.compile(JavaCompiler.java:462) at com.sun.tools.javac.main.Main.compile(Main.java:592) at com.sun.tools.javac.main.Main.compile(Main.java:544) at com.sun.tools.javac.Main.compile(Main.java:58) at com.sun.tools.javac.Main.main(Main.java:48) REPRODUCIBILITY : This bug can be reproduced always. ---------- BEGIN SOURCE ---------- public class GenericsBug { static <T> void varargs(T...args){ for(T t : args) System.out.println(t); } public static void main(String[]args){ varargs(new int[]{1, 2, 3}, new int[]{4, 5, 6}); } } ---------- END SOURCE ---------- CUSTOMER SUBMITTED WORKAROUND : I don't have any, but not to use varargs Hint: When I used the Integer wrapper, it woked, i.e, varargs(new Integer[]{1, 2, 3}, new Integer[]{4, 5, 6}); instead of: varargs(new int[]{1, 2, 3}, new int[]{4, 5, 6}); ###@###.### 2005-1-28 06:42:25 GMT
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