Bugzilla – Full Text Bug Listing
| Summary: | [1.5][compiler] Misleading error message for "instanceof List<Object>" | ||||||||
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| Product: | [Eclipse Project] JDT | Reporter: | Jerome Lanneluc <jerome_lanneluc> | ||||||
| Component: | Core | Assignee: | Philipe Mulet <philippe_mulet> | ||||||
| Status: | VERIFIED FIXED | QA Contact: | |||||||
| Severity: | normal | ||||||||
| Priority: | P3 | CC: | philippe_mulet | ||||||
| Version: | 3.4 | ||||||||
| Target Milestone: | 3.5 M4 | ||||||||
| Hardware: | PC | ||||||||
| OS: | Windows XP | ||||||||
| Whiteboard: | |||||||||
| Attachments: |
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True, but note that quickfix caused a compile error to be raised, which is bad when attempting to fix a warning... they should het a bug opened as well. (In reply to comment #1) > True, but note that quickfix caused a compile error to be raised, which is bad > when attempting to fix a warning... they should het a bug opened as well. Entered bug 258059 against JDT/UI Note also, that our message wasn't good for instanceof T (type param).
e.g.
import java.util.*;
public class X {
<T extends List<Object>> boolean foo2() {
return null instanceof T;
}
}
--> Cannot perform instanceof check against type parameter T. Use instead its erasure List<E> since generic type information will be erased at runtime
Will fix it as well.
Added GenericTypeTest#test1426 Created attachment 119898 [details]
Proposed patch
Created attachment 119906 [details]
Better patch
Released for 3.5M4 Fixed Verified for 3.5M4 using I20081211-0100 |
I20081209-0100 import java.util.List; public class X { boolean foo() { return null instanceof List<Object>; } } This reports: "Cannot perform instanceof check against parameterized type List<Object>. Use instead its raw form List since generic type information will be erased at runtime" It should not suggests to us a raw type since it will trigger a warning (see bug 252120). It should suggests to use List<?> instead.