Bugzilla – Full Text Bug Listing
| Summary: | Compiler does not report an error on instantiating nonstatic inner class from static context which breaks JVM | ||
|---|---|---|---|
| Product: | [Eclipse Project] JDT | Reporter: | Marko Čupić <Marko.Cupic> |
| Component: | Core | Assignee: | Manoj N Palat <manoj.palat> |
| Status: | VERIFIED FIXED | QA Contact: | |
| Severity: | major | ||
| Priority: | P3 | CC: | jarthana, manoj.palat, sravankumarl |
| Version: | 4.19 | Keywords: | regression |
| Target Milestone: | 4.20 M3 | ||
| Hardware: | PC | ||
| OS: | Linux | ||
| See Also: |
https://git.eclipse.org/r/c/jdt/eclipse.jdt.core/+/179871 https://git.eclipse.org/c/jdt/eclipse.jdt.core.git/commit/?id=d21d83fa5b10b0212b45e0894a4a64a2dd28e947 https://git.eclipse.org/r/c/jdt/eclipse.jdt.core/+/179922 |
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| Whiteboard: | |||
keeping in the radar for 4.20 This works in 4.19, so its a regression in 4.20 - marking so. New Gerrit change created: https://git.eclipse.org/r/c/jdt/eclipse.jdt.core/+/179871 Gerrit change https://git.eclipse.org/r/c/jdt/eclipse.jdt.core/+/179871 was merged to [master]. Commit: http://git.eclipse.org/c/jdt/eclipse.jdt.core.git/commit/?id=d21d83fa5b10b0212b45e0894a4a64a2dd28e947 New Gerrit change created: https://git.eclipse.org/r/c/jdt/eclipse.jdt.core/+/179922 Verified for 4.20 M3 using build I20210517-0600. |
The following: public class Demo { public class Singleton { private static Singleton pinstance = new Singleton(); public static Singleton instance() { return pinstance; } public String message() { return "Hello world!"; } } public static void main(String[] args) { System.out.println(Singleton.instance().message()); } } compiles fine in eclipse but JVM chrashes when the program is run: Exception in thread "main" java.lang.VerifyError: Bad local variable type Exception Details: Location: Demo$Singleton.<clinit>()V @4: aload_1 Reason: Type top (current frame, locals[1]) is not assignable to reference type Current Frame: bci: @4 flags: { } locals: { } stack: { uninitialized 0, uninitialized 0 } Bytecode: 0000000: bb00 0159 2bb7 000c b300 10b1 at Demo.main(Demo.java:15) Oracle's compiler (javac) run from command line correctly reports an error: Demo.java:5: error: non-static variable this cannot be referenced from a static context private static Singleton pinstance = new Singleton(); OS is Linux 5.8.0-50-generic #56~20.04.1-Ubuntu SMP Mon Apr 12 21:46:35 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux