hg: jdk/sandbox: 8218543: ThreadsList handling during error reporting can crash

[chris.hegarty at oracle.com]

Changeset: 05dd6144d434
Author:    rehn
Date:      2019-10-14 08:59 +0200
URL:       https://hg.openjdk.java.net/jdk/sandbox/rev/05dd6144d434

8218543: ThreadsList handling during error reporting can crash
Reviewed-by: dcubed, dholmes

! src/hotspot/share/runtime/threadSMR.cpp
! src/hotspot/share/utilities/decoder.cpp
! src/hotspot/share/utilities/vmError.cpp
! src/hotspot/share/utilities/vmError.hpp