Juergen Hoeller opened SPR-14438 and commented

MethodParameter.equals historically just checks instanceof MethodParameter. With the introduction of SynthesizingMethodParameter in 4.2, we need to insist on the same class there: Otherwise, a MethodParameter would be considered as equal to a SynthesizingMethodParameter for the same target declaration.

Affects: 4.2.7, 4.3.1

Issue Links:

• Introduce support for creating a MethodParameter from a Java 8 Parameter [SPR-14055] #18627 Introduce support for creating a MethodParameter from a Java 8 Parameter

Referenced from: commits 39e3f2e, dd65689