6532025: GIF reader throws misleading exception with truncated images

[kvergizova]

I'd like to backport 6532025 to 13u for parity with 11u.
The patch applies cleanly.
Tested with tier1; new test fails without the patch, passes with it.

---

Progress

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

Issue

• JDK-6532025: GIF reader throws misleading exception with truncated images

Download

$ git fetch https://git.openjdk.java.net/jdk13u-dev pull/96/head:pull/96
$ git checkout pull/96

[bridgekeeper]

👋 Welcome back evergizova! A progress list of the required criteria for merging this PR into master 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.

[openjdk]

@kvergizova This change now passes all automated pre-integration checks.

After integration, the commit message for the final commit will be:

6532025: GIF reader throws misleading exception with truncated images

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[mlbridge]

Webrevs

• 00: Full (6b8fdfd)

[kvergizova]

/integrate

[openjdk]

@kvergizova
Your change (at version 6b8fdfd) is now ready to be sponsored by a Committer.

[yan-too]

/sponsor

[openjdk]

@yan-too @kvergizova Since your change was applied there have been 3 commits pushed to the master branch:

• a27970f: 8243290: Improve diagnostic messages for class verification and redefinition failures
• fd622d3: 8256809: Annotation processing causes NPE during flow analysis
• 5c15783: 8212160: JVMTI agent crashes with "assert(_value != 0LL) failed: resolving NULL _value"

Your commit was automatically rebased without conflicts.

Pushed as commit 49b1754.

💡 You may see a message that your pull request was closed with unmerged commits. This can be safely ignored.