8226878: zero crashes after JDK-8191278

[snazarkin]

This is follow up for 8191278 that fixes crash of zero builds. Applies cleanly.

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Progress

• Change must not contain extraneous whitespace
• Commit message must refer to an issue

Integration blocker

 ⚠️ Dependency #173 must be integrated first

Issue

• JDK-8226878: zero crashes after JDK-8191278

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.java.net/jdk11u-dev pull/192/head:pull/192
$ git checkout pull/192

Update a local copy of the PR:
$ git checkout pull/192
$ git pull https://git.openjdk.java.net/jdk11u-dev pull/192/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 192

View PR using the GUI difftool:
$ git pr show -t 192

Using diff file

Download this PR as a diff file:
https://git.openjdk.java.net/jdk11u-dev/pull/192.diff

[bridgekeeper]

👋 Welcome back snazarki! A progress list of the required criteria for merging this PR into pr/173 will be added to the body of your pull request. There are additional pull request commands available for use with this pull request.

[openjdk]

This backport pull request has now been updated with issue from the original commit.

[mlbridge]

Webrevs

• 00: Full (bc9009b9)

[RealCLanger]

@snazarkin, since this item was rejected by the maintainers, would you mind closing this PR?