RFR: 8374448: SIGSEGV in ConstantPool::print_value_on with -XX:CompileCommand=print [v3]

[Kerem Kat]

> `BSMAttributeEntries::is_empty()` used AND, so `!is_empty()` was true when only one of `_offsets`/`_bootstrap_methods` was non-null. Callers then dereferenced the null pointer.
> 
> Changed to OR so `!is_empty()` guarantees both are non-null. Added asserts at the two assignment sites to check for consistency.
> 
> Please note that I could not reproduce this in fastdebug or slowdebug builds on x86_64 Linux.

Kerem Kat has updated the pull request incrementally with one additional commit since the last revision:

  update copyright year

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Changes:
  - all: https://git.openjdk.org/jdk/pull/29611/files
  - new: https://git.openjdk.org/jdk/pull/29611/files/15ac643a..b44e997d

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=29611&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=29611&range=01-02

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/29611.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/29611/head:pull/29611

PR: https://git.openjdk.org/jdk/pull/29611