git: openjdk/jdk20u: master: 8278965: crash in SymbolTable::do_lookup

[Calvin Cheung]

Changeset: f33f25ff
Author:    Calvin Cheung <ccheung at openjdk.org>
Date:      2023-03-02 19:11:33 +0000
URL:       https://git.openjdk.org/jdk20u/commit/f33f25ff6915a0626b53bec8b2629f3fca335887

8278965: crash in SymbolTable::do_lookup

Reviewed-by: fparain
Backport-of: 582b943439488a0f43482b67c0bc0d4975bf4023

! src/hotspot/share/classfile/placeholders.hpp
! src/hotspot/share/classfile/systemDictionary.cpp
+ test/hotspot/gtest/classfile/test_placeholders.cpp