Summary

Fix the implementation of MethodHandles.filterArguments to conform to the specification (the pseudocode).

Problem

MethodHandles.filterArguments pseudocode specifies that the filter method handles are invoked in argument order from left to right. However, the implementation invoked the filter method handles from right to left. This behaviour is observable if the filter arguments retain some global state that affects the results, likely an edge case. However that edge case is exposed for string concatenation using invokedynamic where the toString implementation has side-effects that affect the String result (see JDK-8200118).

Solution

Fix the implementation to invoke filter method handles in argument order from left to right.

Specification

This is a behavioral change. There are no specification changes for JDK 10. Specification is clarified in JDK 11 CSR (JDK-8201371).