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Building a project with Eclipse 3.4 RC1 using JDK6 on Windows Vista 32Bit (SP1) caused the following exception: !ENTRY org.eclipse.core.resources 4 2 2008-06-03 22:22:24.803 !MESSAGE Problems occurred when invoking code from plug-in: "org.eclipse.core.resources". !STACK 0 java.lang.ClassCastException: org.eclipse.jdt.internal.compiler.lookup.BinaryTypeBinding cannot be cast to org.eclipse.jdt.internal.compiler.lookup.SourceTypeBinding at org.eclipse.jdt.internal.compiler.lookup.TypeBinding.isProvablyDistinct(TypeBinding.java:574) at org.eclipse.jdt.internal.compiler.ast.CastExpression.checkUnsafeCast(CastExpression.java:308) at org.eclipse.jdt.internal.compiler.ast.Expression.checkCastTypesCompatibility(Expression.java:486) at org.eclipse.jdt.internal.compiler.ast.CastExpression.resolveType(CastExpression.java:495) at org.eclipse.jdt.internal.compiler.ast.LocalDeclaration.resolve(LocalDeclaration.java:186) at org.eclipse.jdt.internal.compiler.ast.Block.resolve(Block.java:101) at org.eclipse.jdt.internal.compiler.ast.IfStatement.resolve(IfStatement.java:233) at org.eclipse.jdt.internal.compiler.ast.AbstractMethodDeclaration.resolveStatements(AbstractMethodDeclaration.java:444) at org.eclipse.jdt.internal.compiler.ast.MethodDeclaration.resolveStatements(MethodDeclaration.java:191) at org.eclipse.jdt.internal.compiler.ast.AbstractMethodDeclaration.resolve(AbstractMethodDeclaration.java:403) at org.eclipse.jdt.internal.compiler.ast.TypeDeclaration.resolve(TypeDeclaration.java:1096) at org.eclipse.jdt.internal.compiler.ast.TypeDeclaration.resolve(TypeDeclaration.java:1184) at org.eclipse.jdt.internal.compiler.ast.CompilationUnitDeclaration.resolve(CompilationUnitDeclaration.java:535) at org.eclipse.jdt.internal.compiler.Compiler.process(Compiler.java:743) at org.eclipse.jdt.internal.compiler.ProcessTaskManager.run(ProcessTaskManager.java:137) at java.lang.Thread.run(Thread.java:619)
Could you please provide a test case that is causing this problem?
I'll need some time to do that. I found the line in the code, where the compiler struggles over, however, that line includes a number of classes of which the hierarchy seems to be very relevant. Thus, a number of classes is involved which I need to sort out first. If you have any hint on what I should particulary look for, then I could possibly create an example more quickly.
The trace indicates presence of a down cast expression to a parameterized type (where the cast type is ill-formed due to bug in compiler). The cast type is found as a binary, which could indicate a type from a library or any other type previously compiled in incremental build situation. Normally, a binary parameterized type is not directly referenced as BinaryTypeBinding, since all accesses should have been resulting in either ParameterizedTypeBinding creation, or raw conversion. We seem to have a path where a direct BinaryTypeBinding gets surfaced, causing the stack trace to occur (i.e. failure would be expected).
Created attachment 103509 [details] Simple project to reproduce InternalCompiler error Ok, I found a simple example. Unfortunately, it has the problem, that the error only occurs "occasionally" - but at least I know how to reproduce - I hope, it will be reproducible on your machines as well. The class "InternalCompilerError_Main" is where the error occurs. The "funny" part is, that I can "turn it on or off": If I open the InternalCompilerError_Main class in eclipse, add a space somewhere, press Save (Auto Building is turned on), the error disappears. If I do it again, it re-appears. In my "real project", the error is always present. Please tell me, if you're not able to reproduce with that project...
Kay - could you try to reproduce with 3.4RC3 ? This could be a dup of bug 231861 (i.e. another symptom of this same bug).
I could reproduce it with RC1, and not with RC3. The fix for bug 231861 addresses this symptom as well. Added GenericTypeTest#test1338, which fails with jdt/core v_865, and passes with post RC2 versions. *** This bug has been marked as a duplicate of bug 231861 ***
Steps can be reproduced with batch compiler only: 1- compile first Derived_A.java and Derived_B.java 2- compile InternalCompilerError_Main.java against the classfiles produced in (1) or in IDE, incrementally compile InternalCompilerError_Main (add a space and build)
BTW - Kay: thanks for the quick testcase
Can confirm: Compiler error has vanished with RC3 - thanks a lot!
Regression test is actually GenericTypeTest#test1340
Verified during 3.5M2 milestone verification process...
