Attachment 190035 Details for Bug 338234 – proposed fix v2.0 + tests

[patch] proposed fix v2.0 + tests

patch338234_v21.txt (text/plain), 19.80 KB, created by Ayushman Jain

on 2011-03-01 08:37:46 EST

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Creator: Ayushman Jain

Created: 2011-03-01 08:37:46 EST

Size: 19.80 KB

patch

obsolete

>### Eclipse Workspace Patch 1.0
>#P org.eclipse.jdt.core
>Index: compiler/org/eclipse/jdt/internal/compiler/flow/FinallyFlowContext.java
>===================================================================
>RCS file: /cvsroot/eclipse/org.eclipse.jdt.core/compiler/org/eclipse/jdt/internal/compiler/flow/FinallyFlowContext.java,v
>retrieving revision 1.35
>diff -u -r1.35 FinallyFlowContext.java
>--- compiler/org/eclipse/jdt/internal/compiler/flow/FinallyFlowContext.java	25 Feb 2010 15:27:00 -0000	1.35
>+++ compiler/org/eclipse/jdt/internal/compiler/flow/FinallyFlowContext.java	1 Mar 2011 13:32:49 -0000
>@@ -1,5 +1,5 @@
> /*******************************************************************************
>- * Copyright (c) 2000, 2010 IBM Corporation and others.
>+ * Copyright (c) 2000, 2011 IBM Corporation and others.
>  * All rights reserved. This program and the accompanying materials
>  * are made available under the terms of the Eclipse Public License v1.0
>  * which accompanies this distribution, and is available at
>@@ -229,14 +229,14 @@
> 									scope.problemReporter().localVariableRedundantCheckOnNonNull(local, reference);
> 								}
> 								if (!flowInfo.isMarkedAsNullOrNonNullInAssertExpression(local)) {
>-									flowInfo.initsWhenFalse().setReachMode(FlowInfo.UNREACHABLE);
>+									flowInfo.initsWhenFalse().setReachMode(FlowInfo.UNREACHABLE_BY_NULLANALYSIS);
> 								}
> 							} else if (checkType == (CAN_ONLY_NULL_NON_NULL | IN_COMPARISON_NULL)) {
> 								if ((this.tagBits & FlowContext.HIDE_NULL_COMPARISON_WARNING) == 0) {
> 									scope.problemReporter().localVariableNonNullComparedToNull(local, reference);
> 								}
> 								if (!flowInfo.isMarkedAsNullOrNonNullInAssertExpression(local)) {
>-									flowInfo.initsWhenTrue().setReachMode(FlowInfo.UNREACHABLE);
>+									flowInfo.initsWhenTrue().setReachMode(FlowInfo.UNREACHABLE_BY_NULLANALYSIS);
> 								}
> 							}
> 							return;
>@@ -252,7 +252,7 @@
> 										scope.problemReporter().localVariableRedundantCheckOnNull(local, reference);
> 									}
> 									if (!flowInfo.isMarkedAsNullOrNonNullInAssertExpression(local)) {
>-										flowInfo.initsWhenFalse().setReachMode(FlowInfo.UNREACHABLE);
>+										flowInfo.initsWhenFalse().setReachMode(FlowInfo.UNREACHABLE_BY_NULLANALYSIS);
> 									}
> 									return;
> 								case FlowContext.IN_COMPARISON_NON_NULL:
>@@ -264,7 +264,7 @@
> 										scope.problemReporter().localVariableNullComparedToNonNull(local, reference);
> 									}
> 									if (!flowInfo.isMarkedAsNullOrNonNullInAssertExpression(local)) {
>-										flowInfo.initsWhenTrue().setReachMode(FlowInfo.UNREACHABLE);
>+										flowInfo.initsWhenTrue().setReachMode(FlowInfo.UNREACHABLE_BY_NULLANALYSIS);
> 									}
> 									return;
> 								case FlowContext.IN_ASSIGNMENT:
>@@ -314,14 +314,14 @@
> 									scope.problemReporter().localVariableRedundantCheckOnNonNull(local, reference);
> 								}
> 								if (!flowInfo.isMarkedAsNullOrNonNullInAssertExpression(local)) {
>-									flowInfo.initsWhenFalse().setReachMode(FlowInfo.UNREACHABLE);
>+									flowInfo.initsWhenFalse().setReachMode(FlowInfo.UNREACHABLE_BY_NULLANALYSIS);
> 								}
> 							} else {
> 								if ((this.tagBits & FlowContext.HIDE_NULL_COMPARISON_WARNING) == 0) {
> 									scope.problemReporter().localVariableNonNullComparedToNull(local, reference);
> 								}
> 								if (!flowInfo.isMarkedAsNullOrNonNullInAssertExpression(local)) {
>-									flowInfo.initsWhenTrue().setReachMode(FlowInfo.UNREACHABLE);
>+									flowInfo.initsWhenTrue().setReachMode(FlowInfo.UNREACHABLE_BY_NULLANALYSIS);
> 								}
> 							}
> 							return;
>@@ -342,7 +342,7 @@
> 										scope.problemReporter().localVariableRedundantCheckOnNull(local, reference);
> 									}
> 									if (!flowInfo.isMarkedAsNullOrNonNullInAssertExpression(local)) {
>-										flowInfo.initsWhenFalse().setReachMode(FlowInfo.UNREACHABLE);
>+										flowInfo.initsWhenFalse().setReachMode(FlowInfo.UNREACHABLE_BY_NULLANALYSIS);
> 									}
> 									return;
> 								case FlowContext.IN_COMPARISON_NON_NULL:
>@@ -354,7 +354,7 @@
> 										scope.problemReporter().localVariableNullComparedToNonNull(local, reference);
> 									}
> 									if (!flowInfo.isMarkedAsNullOrNonNullInAssertExpression(local)) {
>-										flowInfo.initsWhenTrue().setReachMode(FlowInfo.UNREACHABLE);
>+										flowInfo.initsWhenTrue().setReachMode(FlowInfo.UNREACHABLE_BY_NULLANALYSIS);
> 									}
> 									return;
> 								case FlowContext.IN_ASSIGNMENT:
>Index: compiler/org/eclipse/jdt/internal/compiler/flow/FlowContext.java
>===================================================================
>RCS file: /cvsroot/eclipse/org.eclipse.jdt.core/compiler/org/eclipse/jdt/internal/compiler/flow/FlowContext.java,v
>retrieving revision 1.68
>diff -u -r1.68 FlowContext.java
>--- compiler/org/eclipse/jdt/internal/compiler/flow/FlowContext.java	1 Sep 2010 15:49:57 -0000	1.68
>+++ compiler/org/eclipse/jdt/internal/compiler/flow/FlowContext.java	1 Mar 2011 13:32:49 -0000
>@@ -1,5 +1,5 @@
> /*******************************************************************************
>- * Copyright (c) 2000, 2010 IBM Corporation and others.
>+ * Copyright (c) 2000, 2011 IBM Corporation and others.
>  * All rights reserved. This program and the accompanying materials
>  * are made available under the terms of the Eclipse Public License v1.0
>  * which accompanies this distribution, and is available at
>@@ -578,14 +578,14 @@
> 						scope.problemReporter().localVariableRedundantCheckOnNonNull(local, reference);
> 					}
> 					if (!flowInfo.isMarkedAsNullOrNonNullInAssertExpression(local)) {
>-						flowInfo.initsWhenFalse().setReachMode(FlowInfo.UNREACHABLE);
>+						flowInfo.initsWhenFalse().setReachMode(FlowInfo.UNREACHABLE_BY_NULLANALYSIS);
> 					}
> 				} else {
> 					if ((this.tagBits & FlowContext.HIDE_NULL_COMPARISON_WARNING) == 0) {
> 						scope.problemReporter().localVariableNonNullComparedToNull(local, reference);
> 					}
> 					if (!flowInfo.isMarkedAsNullOrNonNullInAssertExpression(local)) {
>-						flowInfo.initsWhenTrue().setReachMode(FlowInfo.UNREACHABLE);
>+						flowInfo.initsWhenTrue().setReachMode(FlowInfo.UNREACHABLE_BY_NULLANALYSIS);
> 					}
> 				}
> 				return;
>@@ -609,7 +609,7 @@
> 							scope.problemReporter().localVariableRedundantCheckOnNull(local, reference);
> 						}
> 						if (!flowInfo.isMarkedAsNullOrNonNullInAssertExpression(local)) {
>-							flowInfo.initsWhenFalse().setReachMode(FlowInfo.UNREACHABLE);
>+							flowInfo.initsWhenFalse().setReachMode(FlowInfo.UNREACHABLE_BY_NULLANALYSIS);
> 						}
> 						return;
> 					case FlowContext.IN_COMPARISON_NON_NULL:
>@@ -621,7 +621,7 @@
> 							scope.problemReporter().localVariableNullComparedToNonNull(local, reference);
> 						}
> 						if (!flowInfo.isMarkedAsNullOrNonNullInAssertExpression(local)) {
>-							flowInfo.initsWhenTrue().setReachMode(FlowInfo.UNREACHABLE);
>+							flowInfo.initsWhenTrue().setReachMode(FlowInfo.UNREACHABLE_BY_NULLANALYSIS);
> 						}
> 						return;
> 					case FlowContext.IN_ASSIGNMENT:
>Index: compiler/org/eclipse/jdt/internal/compiler/flow/FlowInfo.java
>===================================================================
>RCS file: /cvsroot/eclipse/org.eclipse.jdt.core/compiler/org/eclipse/jdt/internal/compiler/flow/FlowInfo.java,v
>retrieving revision 1.45
>diff -u -r1.45 FlowInfo.java
>--- compiler/org/eclipse/jdt/internal/compiler/flow/FlowInfo.java	16 Dec 2010 13:02:30 -0000	1.45
>+++ compiler/org/eclipse/jdt/internal/compiler/flow/FlowInfo.java	1 Mar 2011 13:32:49 -0000
>@@ -1,5 +1,5 @@
> /*******************************************************************************
>- * Copyright (c) 2000, 2010 IBM Corporation and others.
>+ * Copyright (c) 2000, 2011 IBM Corporation and others.
>  * All rights reserved. This program and the accompanying materials
>  * are made available under the terms of the Eclipse Public License v1.0
>  * which accompanies this distribution, and is available at
>@@ -22,8 +22,23 @@
> 
> 	public int tagBits; // REACHABLE by default
> 	public final static int REACHABLE = 0;
>-	public final static int UNREACHABLE = 1;
>+	/* unreachable code as defined in the language spec 
>+	 * eg. while (true);
>+	 *     i++;  --> unreachable code 
>+	 */
>+	public final static int UNREACHABLE_OR_DEAD = 1;
> 	public final static int NULL_FLAG_MASK = 2;
>+	/* unreachable code as inferred by null analysis
>+	 * eg. str = null;
>+	 *     if (str != null) {
>+	 *        // dead code
>+	 *     }
>+	 */
>+	public final static int UNREACHABLE_BY_NULLANALYSIS = 4;
>+	/*
>+	 * code unreachable in any fashion
>+	 */
>+	public final static int UNREACHABLE = UNREACHABLE_OR_DEAD | UNREACHABLE_BY_NULLANALYSIS;
> 
> 	public final static int UNKNOWN = 1;
> 	public final static int NULL = 2;
>@@ -456,9 +471,9 @@
> }
> 
> /**
>- * Return REACHABLE if this flow info is reachable, UNREACHABLE
>+ * Return REACHABLE if this flow info is reachable, UNREACHABLE|UNREACHABLE_BY_NULLANALYSIS
>  * else.
>- * @return REACHABLE if this flow info is reachable, UNREACHABLE
>+ * @return REACHABLE if this flow info is reachable, UNREACHABLE|UNREACHABLE_BY_NULLANALYSIS
>  *         else
>  */
> public int reachMode() {
>Index: compiler/org/eclipse/jdt/internal/compiler/flow/LoopingFlowContext.java
>===================================================================
>RCS file: /cvsroot/eclipse/org.eclipse.jdt.core/compiler/org/eclipse/jdt/internal/compiler/flow/LoopingFlowContext.java,v
>retrieving revision 1.52
>diff -u -r1.52 LoopingFlowContext.java
>--- compiler/org/eclipse/jdt/internal/compiler/flow/LoopingFlowContext.java	16 Feb 2011 18:57:48 -0000	1.52
>+++ compiler/org/eclipse/jdt/internal/compiler/flow/LoopingFlowContext.java	1 Mar 2011 13:32:49 -0000
>@@ -493,14 +493,14 @@
> 						scope.problemReporter().localVariableRedundantCheckOnNonNull(local, reference);
> 					}
> 					if (!flowInfo.isMarkedAsNullOrNonNullInAssertExpression(local)) {
>-						flowInfo.initsWhenFalse().setReachMode(FlowInfo.UNREACHABLE);
>+						flowInfo.initsWhenFalse().setReachMode(FlowInfo.UNREACHABLE_BY_NULLANALYSIS);
> 					}
> 				} else {
> 					if ((this.tagBits & FlowContext.HIDE_NULL_COMPARISON_WARNING) == 0) {
> 						scope.problemReporter().localVariableNonNullComparedToNull(local, reference);
> 					}
> 					if (!flowInfo.isMarkedAsNullOrNonNullInAssertExpression(local)) {
>-						flowInfo.initsWhenTrue().setReachMode(FlowInfo.UNREACHABLE);
>+						flowInfo.initsWhenTrue().setReachMode(FlowInfo.UNREACHABLE_BY_NULLANALYSIS);
> 					}
> 				}
> 			} else if (flowInfo.isDefinitelyNull(local)) {
>@@ -509,14 +509,14 @@
> 						scope.problemReporter().localVariableRedundantCheckOnNull(local, reference);
> 					}
> 					if (!flowInfo.isMarkedAsNullOrNonNullInAssertExpression(local)) {
>-						flowInfo.initsWhenFalse().setReachMode(FlowInfo.UNREACHABLE);
>+						flowInfo.initsWhenFalse().setReachMode(FlowInfo.UNREACHABLE_BY_NULLANALYSIS);
> 					}
> 				} else {
> 					if ((this.tagBits & FlowContext.HIDE_NULL_COMPARISON_WARNING) == 0) {
> 						scope.problemReporter().localVariableNullComparedToNonNull(local, reference);
> 					}
> 					if (!flowInfo.isMarkedAsNullOrNonNullInAssertExpression(local)) {
>-						flowInfo.initsWhenTrue().setReachMode(FlowInfo.UNREACHABLE);
>+						flowInfo.initsWhenTrue().setReachMode(FlowInfo.UNREACHABLE_BY_NULLANALYSIS);
> 					}
> 				}
> 			} else if (this.upstreamNullFlowInfo.isDefinitelyNonNull(local) && !flowInfo.isPotentiallyNull(local) && !flowInfo.isPotentiallyUnknown(local)) {    
>@@ -554,7 +554,7 @@
> 							scope.problemReporter().localVariableRedundantCheckOnNull(local, reference);
> 						}
> 						if (!flowInfo.isMarkedAsNullOrNonNullInAssertExpression(local)) {
>-							flowInfo.initsWhenFalse().setReachMode(FlowInfo.UNREACHABLE);
>+							flowInfo.initsWhenFalse().setReachMode(FlowInfo.UNREACHABLE_BY_NULLANALYSIS);
> 						}
> 						return;
> 					case FlowContext.IN_COMPARISON_NON_NULL:
>@@ -566,7 +566,7 @@
> 							scope.problemReporter().localVariableNullComparedToNonNull(local, reference);
> 						}
> 						if (!flowInfo.isMarkedAsNullOrNonNullInAssertExpression(local)) {
>-							flowInfo.initsWhenTrue().setReachMode(FlowInfo.UNREACHABLE);
>+							flowInfo.initsWhenTrue().setReachMode(FlowInfo.UNREACHABLE_BY_NULLANALYSIS);
> 						}
> 						return;
> 					case FlowContext.IN_ASSIGNMENT:
>Index: compiler/org/eclipse/jdt/internal/compiler/flow/UnconditionalFlowInfo.java
>===================================================================
>RCS file: /cvsroot/eclipse/org.eclipse.jdt.core/compiler/org/eclipse/jdt/internal/compiler/flow/UnconditionalFlowInfo.java,v
>retrieving revision 1.72
>diff -u -r1.72 UnconditionalFlowInfo.java
>--- compiler/org/eclipse/jdt/internal/compiler/flow/UnconditionalFlowInfo.java	19 Jan 2011 05:29:54 -0000	1.72
>+++ compiler/org/eclipse/jdt/internal/compiler/flow/UnconditionalFlowInfo.java	1 Mar 2011 13:32:49 -0000
>@@ -731,7 +731,7 @@
> final public boolean isDefinitelyAssigned(FieldBinding field) {
> 	// Mirrored in CodeStream.isDefinitelyAssigned(..)
> 	// do not want to complain in unreachable code
>-	if ((this.tagBits & UNREACHABLE) != 0) {
>+	if ((this.tagBits & UNREACHABLE_OR_DEAD) != 0) {
> 		return true;
> 	}
> 	return isDefinitelyAssigned(field.id);
>@@ -739,7 +739,7 @@
> 
> final public boolean isDefinitelyAssigned(LocalVariableBinding local) {
> 	// do not want to complain in unreachable code if local declared in reachable code
>-	if ((this.tagBits & UNREACHABLE) != 0 && (local.declaration.bits & ASTNode.IsLocalDeclarationReachable) != 0) {
>+	if ((this.tagBits & UNREACHABLE_OR_DEAD) != 0 && (local.declaration.bits & ASTNode.IsLocalDeclarationReachable) != 0) {
> 		return true;
> 	}
> 	return isDefinitelyAssigned(local.id + this.maxFieldCount);
>@@ -1563,6 +1563,17 @@
> 		na1, na2, na3, na4,
> 		nb1, nb2, nb3, nb4,
> 		b1, b2, b3, b4;
>+  if ((otherInits.tagBits & FlowInfo.UNREACHABLE_BY_NULLANALYSIS) != 0) {
>+	  otherHasNulls = false; // skip merging, otherInits is unreachable by null analysis
>+  } else {
>+	if ((this.tagBits & FlowInfo.UNREACHABLE_BY_NULLANALYSIS) != 0) { // directly copy if this is unreachable by null analysis
>+		this.nullBit1 = otherInits.nullBit1;
>+		this.nullBit2 = otherInits.nullBit2;
>+		this.nullBit3 = otherInits.nullBit3;
>+		this.nullBit4 = otherInits.nullBit4;
>+		thisHadNulls = false;
>+		thisHasNulls = otherHasNulls;
>+	} else
> 	if (thisHadNulls) {
>     	if (otherHasNulls) {
>     		this.nullBit1 = (a2 = this.nullBit2) & (a3 = this.nullBit3)
>@@ -1636,6 +1647,7 @@
>     		this.nullBit3 != 0 ||
>     		this.nullBit4 != 0;
> 	}
>+  }
> 
> 	// treating extra storage
> 	if (this.extra != null || otherInits.extra != null) {
>@@ -1858,6 +1870,8 @@
> 	}	
> 	if (reachMode == REACHABLE ) {
> 		this.tagBits &= ~UNREACHABLE;
>+	} else if (reachMode == UNREACHABLE_BY_NULLANALYSIS) {
>+		this.tagBits |= UNREACHABLE_BY_NULLANALYSIS; // don't interfere with definite assignment analysis
> 	} else {
> 		if ((this.tagBits & UNREACHABLE) == 0) {
> 			// reset optional inits when becoming unreachable
>#P org.eclipse.jdt.core.tests.compiler
>Index: src/org/eclipse/jdt/core/tests/compiler/regression/FlowAnalysisTest.java
>===================================================================
>RCS file: /cvsroot/eclipse/org.eclipse.jdt.core.tests.compiler/src/org/eclipse/jdt/core/tests/compiler/regression/FlowAnalysisTest.java,v
>retrieving revision 1.46
>diff -u -r1.46 FlowAnalysisTest.java
>--- src/org/eclipse/jdt/core/tests/compiler/regression/FlowAnalysisTest.java	1 Sep 2010 15:49:30 -0000	1.46
>+++ src/org/eclipse/jdt/core/tests/compiler/regression/FlowAnalysisTest.java	1 Mar 2011 13:32:52 -0000
>@@ -1,5 +1,5 @@
> /*******************************************************************************
>- * Copyright (c) 2005, 2010 IBM Corporation and others.
>+ * Copyright (c) 2005, 2011 IBM Corporation and others.
>  * All rights reserved. This program and the accompanying materials
>  * are made available under the terms of the Eclipse Public License v1.0
>  * which accompanies this distribution, and is available at
>@@ -29,7 +29,9 @@
> public class FlowAnalysisTest extends AbstractRegressionTest {
> static {
> //	TESTS_NUMBERS = new int[] { 69 };
>+//	TESTS_NAMES = new String[] { "testBug338234" };
> }
>+
> public FlowAnalysisTest(String name) {
> 	super(name);
> }
>@@ -2246,6 +2248,92 @@
> 		"Dead code\n" + 
> 		"----------\n");
> }
>+
>+// https://bugs.eclipse.org/bugs/show_bug.cgi?id=338234
>+// Warn uninitialized variable in deadcode if deadcode has been inferred
>+// by null analysis
>+public void testBug338234a() {
>+	this.runNegativeTest(
>+		new String[] {
>+			"X.java",
>+			"public class X {\n" +
>+			"    public static void main(String[] args) {\n" + 
>+			"        int i;\n" + 
>+			"        String str = null;\n" + 
>+			"        if (str != null)\n" + 
>+			"            i++;    \n" + 
>+			"    }\n" + 
>+			"}\n"
>+		},
>+		"----------\n" + 
>+		"1. WARNING in X.java (at line 6)\n" + 
>+		"	i++;    \n" + 
>+		"	^^^\n" + 
>+		"Dead code\n" + 
>+		"----------\n" + 
>+		"2. ERROR in X.java (at line 6)\n" + 
>+		"	i++;    \n" + 
>+		"	^\n" + 
>+		"The local variable i may not have been initialized\n" + 
>+		"----------\n");
>+}
>+
>+// https://bugs.eclipse.org/bugs/show_bug.cgi?id=338234
>+// Don't warn uninitialized variable in deadcode if deadcode has not been inferred
>+// by null analysis
>+public void testBug338234b() {
>+	this.runConformTest(
>+		new String[] {
>+			"X.java",
>+			"public class X {\n" +
>+			"    public static void main(String[] args) {\n" + 
>+			"        int i;\n" + 
>+			"        l: {\n" +
>+			"			if(false)\n" +
>+			"				break l;\n" + 
>+			"        	return;\n" +
>+			"		 }\n" + 
>+			"        i++;    \n" + 
>+			"    }\n" + 
>+			"}\n"
>+		},
>+		"");
>+}
>+
>+// https://bugs.eclipse.org/bugs/show_bug.cgi?id=338234
>+// Warn uninitialized field in deadcode if deadcode has been inferred
>+// by null analysis
>+public void testBug338234c() {
>+	this.runNegativeTest(
>+		new String[] {
>+			"X.java",
>+			"public class X {\n" +
>+			"    public final int field1;\n" +
>+			"    {\n" + 
>+			"        int i;\n" + 
>+			"        String str = null;\n" +
>+			"		 if(str != null)\n" +
>+			"			i = field1;\n" + 
>+			"    }\n" + 
>+			"}\n"
>+		},
>+		"----------\n" + 
>+		"1. ERROR in X.java (at line 1)\n" + 
>+		"	public class X {\n" + 
>+		"	             ^\n" + 
>+		"The blank final field field1 may not have been initialized\n" + 
>+		"----------\n" + 
>+		"2. WARNING in X.java (at line 7)\n" + 
>+		"	i = field1;\n" + 
>+		"	^^^^^^^^^^\n" + 
>+		"Dead code\n" + 
>+		"----------\n" + 
>+		"3. ERROR in X.java (at line 7)\n" + 
>+		"	i = field1;\n" + 
>+		"	    ^^^^^^\n" + 
>+		"The blank final field field1 may not have been initialized\n" + 
>+		"----------\n");
>+}
> public static Class testClass() {
> 	return FlowAnalysisTest.class;
> }
>Index: src/org/eclipse/jdt/core/tests/compiler/regression/NullReferenceTest.java
>===================================================================
>RCS file: /cvsroot/eclipse/org.eclipse.jdt.core.tests.compiler/src/org/eclipse/jdt/core/tests/compiler/regression/NullReferenceTest.java,v
>retrieving revision 1.113
>diff -u -r1.113 NullReferenceTest.java
>--- src/org/eclipse/jdt/core/tests/compiler/regression/NullReferenceTest.java	27 Feb 2011 21:42:50 -0000	1.113
>+++ src/org/eclipse/jdt/core/tests/compiler/regression/NullReferenceTest.java	1 Mar 2011 13:32:52 -0000
>@@ -14060,4 +14060,28 @@
> 		},
> 		"");
> }
>+
>+// https://bugs.eclipse.org/bugs/show_bug.cgi?id=338234
>+public void testBug338234() {
>+	this.runNegativeTest(
>+		new String[] {
>+			"X.java",
>+			"public class X {\n" + 
>+			"   static int foo() {\n" + 
>+			"        Object o = null;\n" +
>+			"		 int i = 0;\n" + 
>+			"        label: {\n" + 
>+			"            if (o == null)\n" + 
>+			"                break label;\n" +
>+			"			 i++;" + 
>+			"        }\n" + 
>+			"         if (i != 0) {\n" + 
>+			"            System.out.println(i);\n" + 
>+			"        }\n" + 
>+			"        return 0;\n" + 
>+			"    }\n" + 
>+			"}\n"
>+		},
>+		"");
>+}
> }
>\ No newline at end of file

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Attachments on bug 338234: 189898 | 189936 | 190035 | 190073 | 190298 | 190355