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8274347: Passing a *nested* switch expression as a parameter causes an NPE during compile #5836

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@lahodaj lahodaj commented Oct 6, 2021

Switch handling needs to compute if a case's statements complete normally or not (this is used on multiple places later in the pipeline). But, especially during speculative attributions, the tree may not be fully attributed. preFlow should be invoked before invoking flow. The patch also fixes binding pattern handling in preFlow/postAttr.


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  • JDK-8274347: Passing a nested switch expression as a parameter causes an NPE during compile



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👋 Welcome back jlahoda! 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 openjdk bot added the rfr label Oct 6, 2021
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@lahodaj The following label will be automatically applied to this pull request:

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@vicente-romero-oracle vicente-romero-oracle left a comment

looks sensible to me


@@ -1800,6 +1800,7 @@ private void handleSwitch(JCTree switchTree,

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this makes sense, we are doing the same for lambdas


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@openjdk openjdk bot commented Oct 6, 2021

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

ℹ️ This project also has non-automated pre-integration requirements. Please see the file for details.

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

8274347: Passing a *nested* switch expression as a parameter causes an NPE during compile

Reviewed-by: vromero

You can use pull request commands such as /summary, /contributor and /issue to adjust it as needed.

At the time when this comment was updated there had been 30 new commits pushed to the master branch:

  • c10de35: 8262944: Improve exception message when automatic module lists provider class not in JAR file
  • b8af6a9: 8273917: Remove 'leaf' ranking for Mutex
  • c80a612: 8273381: Assert in PtrQueueBufferAllocatorTest.stress_free_list_allocator_vm
  • 9759fcb: 8274496: Use String.contains() instead of String.indexOf() in java.desktop
  • cdf8930: 8274625: Search field placeholder behavior
  • df125f6: 8273410: IR verification framework fails with "Should find method name in validIrRulesMap"
  • c74726d: 8274730: AArch64: AES/GCM acceleration is broken by the fix for JDK-8273297
  • 2faced0: 8274738: ZGC: Use relaxed atomic load when reading bits in the live map
  • 8a4d2b4: 8274680: Remove unnecessary conversion to String in java.desktop
  • 986ee5d: 8274670: Improve version string handling in SA
  • ... and 20 more:

As there are no conflicts, your changes will automatically be rebased on top of these commits when integrating. If you prefer to avoid this automatic rebasing, please check the documentation for the /integrate command for further details.

➡️ To integrate this PR with the above commit message to the master branch, type /integrate in a new comment.


@openjdk openjdk bot added the ready label Oct 6, 2021
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@lahodaj lahodaj commented Oct 11, 2021



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@openjdk openjdk bot commented Oct 11, 2021

Going to push as commit b870468.
Since your change was applied there have been 76 commits pushed to the master branch:

  • 110e38d: 8274753: ZGC: SEGV in MetaspaceShared::link_shared_classes
  • b7af890: 8274430: Remove some debug error printing code added in JDK-8017163
  • aaf2401: 8274927: Remove unnecessary G1ArchiveAllocator code
  • c55dd36: 8275008: gtest build failure due to stringop-overflow warning with gcc11
  • 3edee1e: 8272723: Don't use Access API to access primitive fields
  • 49f8ce6: 8274773: [TESTBUG] UnsafeIntrinsicsTest intermittently fails on weak memory model platform
  • c032186: 8272968: AArch64: Remove redundant matching rules for commutative ops
  • a05873a: 8274952: jdk/jfr/api/consumer/ failed when c1 disabled
  • 5ecc99b: 8274620: resourcehogs/serviceability/sa/ is timing out
  • 2ff3977: 8275004: CDS build failure with gcc11
  • ... and 66 more:

Your commit was automatically rebased without conflicts.


@openjdk openjdk bot closed this Oct 11, 2021
@openjdk openjdk bot added integrated and removed ready rfr labels Oct 11, 2021
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@openjdk openjdk bot commented Oct 11, 2021

@lahodaj Pushed as commit b870468.

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


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