RFR: 8285885: Replay compilation fails with assert(is_valid()) failed: check invoke

[Dean Long]

This change makes replay more tolerant so it will fail gracefully instead of assert if it can't find an invoke bytecode at the desired bci.

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Commit messages:
 - handle bytecode lookup failures

Changes: https://git.openjdk.java.net/jdk/pull/8514/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=8514&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8285885
  Stats: 6 lines in 1 file changed: 5 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk/pull/8514.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/8514/head:pull/8514

PR: https://git.openjdk.java.net/jdk/pull/8514