FATAL: bazel crashed due to an internal error. - Platforms

[thna123459]

Description of the problem / feature request:

Crash NullPointerException

$ ./run.sh
Starting local Bazel server and connecting to it...
Analyzing: target //:main (24 packages loaded, 576 targets configured)
FATAL: bazel crashed due to an internal error. Printing stack trace:
java.lang.RuntimeException: Unrecoverable error while evaluating node 'ConfiguredTargetKey{label=//:main, config=BuildConfigurationValue.Key[86e57527e1c8bb10edc853e734cb858f8159d8f3e0a4df9ceb16f80aad784b93]}' (requested by nodes )
	at com.google.devtools.build.skyframe.AbstractParallelEvaluator$Evaluate.run(AbstractParallelEvaluator.java:563)
	at com.google.devtools.build.lib.concurrent.AbstractQueueVisitor$WrappedRunnable.run(AbstractQueueVisitor.java:398)
	at java.base/java.util.concurrent.ForkJoinTask$AdaptedRunnableAction.exec(Unknown Source)
	at java.base/java.util.concurrent.ForkJoinTask.doExec(Unknown Source)
	at java.base/java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(Unknown Source)
	at java.base/java.util.concurrent.ForkJoinPool.scan(Unknown Source)
	at java.base/java.util.concurrent.ForkJoinPool.runWorker(Unknown Source)
	at java.base/java.util.concurrent.ForkJoinWorkerThread.run(Unknown Source)
Caused by: java.lang.NullPointerException
	at com.google.devtools.build.lib.analysis.platform.ConstraintCollection.hasConstraintValue(ConstraintCollection.java:216)
	at com.google.devtools.build.lib.analysis.RuleContext.targetPlatformHasConstraint(RuleContext.java:1226)
	at com.google.devtools.build.lib.analysis.constraints.RuleContextConstraintSemantics.lambda$incompatibleConfiguredTarget$1(RuleContextConstraintSemantics.java:904)
	at java.base/java.util.stream.ReferencePipeline$2$1.accept(Unknown Source)
	at com.google.common.collect.CollectSpliterators$1.lambda$forEachRemaining$1(CollectSpliterators.java:120)
	at java.base/java.util.AbstractList$RandomAccessSpliterator.forEachRemaining(Unknown Source)
	at com.google.common.collect.CollectSpliterators$1.forEachRemaining(CollectSpliterators.java:120)
	at java.base/java.util.stream.AbstractPipeline.copyInto(Unknown Source)
	at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(Unknown Source)
	at java.base/java.util.stream.ReduceOps$ReduceOp.evaluateSequential(Unknown Source)
	at java.base/java.util.stream.AbstractPipeline.evaluate(Unknown Source)
	at java.base/java.util.stream.ReferencePipeline.collect(Unknown Source)
	at com.google.devtools.build.lib.analysis.constraints.RuleContextConstraintSemantics.incompatibleConfiguredTarget(RuleContextConstraintSemantics.java:905)
	at com.google.devtools.build.lib.analysis.ConfiguredTargetFactory.createRule(ConfiguredTargetFactory.java:327)
	at com.google.devtools.build.lib.analysis.ConfiguredTargetFactory.createConfiguredTarget(ConfiguredTargetFactory.java:194)
	at com.google.devtools.build.lib.skyframe.SkyframeBuildView.createConfiguredTarget(SkyframeBuildView.java:938)
	at com.google.devtools.build.lib.skyframe.ConfiguredTargetFunction.createConfiguredTarget(ConfiguredTargetFunction.java:1013)
	at com.google.devtools.build.lib.skyframe.ConfiguredTargetFunction.compute(ConfiguredTargetFunction.java:371)
	at com.google.devtools.build.skyframe.AbstractParallelEvaluator$Evaluate.run(AbstractParallelEvaluator.java:477)
	... 7 more

Bugs: what's the simplest, easiest way to reproduce this bug? Please provide a minimal example if possible.

Run bazelisk build :main with Bazel 4.0.0 on MacOS with the following BUILD file:

platform(
    name = "myplatform",
    constraint_values = [
        "@platforms//os:linux",
        "@platforms//cpu:arm",
    ],
)

java_binary(
    name = "main",
    srcs = ["Foo.java"],
    main_class = "Foo",
    target_compatible_with = [":myplatform"]
)

What operating system are you running Bazel on?

MacOS or Linux

What's the output of bazel info release?

$ bazel info release
Starting local Bazel server and connecting to it...
release 4.0.0

Have you found anything relevant by searching the web?

No.

Any other information, logs, or outputs that you want to share?

See attachment: testcase.tar.gz

[katre]

The crash is concerning and I'll address it immediately. Bazel shouldn't crash, it should fail gracefully and report an error.

The good news is, there's a simple fix: the correct type of target to use in target_compatible_with is a constraint_value, not a platform target. If you re-write your target to be:

java_binary(
    name = "main",
    srcs = ["Foo.java"],
    main_class = "Foo",
    target_compatible_with = [
        "@platforms//os:linux",
        "@platforms//cpu:arm",
    ],
)

This will correctly report that the target can't be built.

[holaworlds]

I am receiving simirlar error. My bazel version is : bazel 4.1.0 running on MacOS

[katre]

@holaworlds This is a similar error message but a different underlying cause. Please open a new issue with details on how to reproduce the error.