hg: jdk/sandbox: 8231058: VerifyOops crashes with assert(_offset >= 0) failed: offset for non comment?

[chris.hegarty at oracle.com]

Changeset: acc7ea6bf0b4
Author:    thartmann
Date:      2019-09-23 14:30 +0200
URL:       https://hg.openjdk.java.net/jdk/sandbox/rev/acc7ea6bf0b4

8231058: VerifyOops crashes with assert(_offset >= 0) failed: offset for non comment?
Summary: Offset method should only be called for comments.
Reviewed-by: roland, dholmes

! src/hotspot/share/asm/codeBuffer.cpp
+ test/hotspot/jtreg/runtime/CheckUnhandledOops/TestVerifyOops.java