[jdk17u-dev] RFR: 8293012: ConstantPool::print_on can crash if _cache is NULL

[Aleksey Shipilev]

Clean backport to improve error logging path reliability.

Additional testing:
 - [ ] GHA

-------------

Commit messages:
 - Backport 9424d6d487db4ad0f6f671a8c33b8f169794fe25

Changes: https://git.openjdk.org/jdk17u-dev/pull/1467/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=1467&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8293012
  Stats: 2 lines in 1 file changed: 1 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/1467.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/1467/head:pull/1467

PR: https://git.openjdk.org/jdk17u-dev/pull/1467