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MethodCall.resolve() does not apply ElementMatcher to private methods in a DynamicType under construction

See original GitHub issue

I will try to refine this bug report as I learn more. I thought it was worth filing anyway because ElementMatchers are used so much and are so central to ByteBuddy.

I’m defining a DynamicType. As part of doing this, I am defining two private methods: produce and inject.

At one point in my program I do this:

MethodCall.invoke(ElementMatchers.named("inject"))...

…i.e. “please invoke the inject method I defined elsewhere in this dynamic type”.

I get an exception indicating that (as it happens) two methods (!) meet this criteria (even though I’ve only defined one inject method). When I debug into the resolution code, I see that my produce method has somehow matched the ElementMatchers.named("inject") matcher. I’m not sure how this can happen.

I’m attaching a NetBeans debugger screenshot showing MethodCall.java at line 812. Here, candidates.size() is 2. You can see that the matcher is name(equals(inject)) and one of the two candidates is produce.

Screen Shot 2021-01-30 at 11 13 52 AM

Issue Analytics

State:
Created 3 years ago
Comments:5 (5 by maintainers)

Top GitHub Comments

1reaction

raphwcommented, Feb 2, 2021

Silly me pushed it to an unrelated branch, thanks for noticing!

0reactions

ljnelsoncommented, Feb 2, 2021

Hi, @raphw; I’m, er, not sure that you did. See:

https://github.com/raphw/byte-buddy/blob/636c274333744ff3d44cb5ace1da926a400e02a2/byte-buddy-dep/src/main/java/net/bytebuddy/implementation/MethodCall.java#L810

As of 2021-02-01 line 810 still doesn’t feature the matcher.

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