Forcing values with toMap in dependency loop situations can emit null values from VmObject.iterateAlreadyForcedMemberValues #337

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opened 2025-12-30 01:23:39 +01:00 by adam · 2 comments

adam commented 2025-12-30 01:23:39 +01:00

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Originally created by @sin-ack on GitHub (Aug 20, 2025).

Reproduced in Pkl 0.29.0.

I don't really have a reproducer for this, as the failure happens in an internal codebase which I am not allowed to share and I haven't been able to create an independent reproduction that exhibits the error. This is an approximation of how the code looks (but does not reproduce the error):

// --- meta.pkl ---
amends "PackageMetadata.pkl"

name = "package"

packages {
    ["package"] {
        meta = (import("meta.pkl")) {}
        definition = (import("definition.pkl")) {}
    }
}

// --- definition.pkl ---
extends "PackageDefinition.pkl"

import "DockerContainerTask.pkl"
import "DockerNetworkTask.pkl"

import "meta.pkl"

tasks {
    ["Docker"] {
        local docker = this

        ["network"] = new DockerNetworkTask {
            name = "network"
        }

        ["backend"] = new DockerContainerTask {
            name = "backend"
            image = "backend"
            networks { docker["network"].asNetwork(meta.self) }
        }

        ["other"] = new DockerContainerTask {
            name = "other"
            image = "other"
        }
    }
}

// --- PackageMetadata.pkl ---
module PackageMetadata

import "PackageDefinition.pkl"
import "PackageMetadata.pkl"

name: String
packages: Mapping<String, Package>

hidden fixed self = packages[name]

class Package {
    meta: PackageMetadata
    definition: PackageDefinition

    function absoluteName(providerName: String, taskName: String): String =
        let (provider = definition.tasks.getOrNull(providerName))
        if (provider == null) throw("Package '\(this.meta.name)' does not support provider '\(providerName)'")
        else
            // v Error happens here, in `filter`
            let (task = provider.toMap().values.filter((t) -> t.name == taskName).firstOrNull)
            if (task == null) throw("Package '\(meta.name)' does not contain task '\(taskName)' in provider '\(providerName)'")
            else "\(meta.name)-\(taskName)"
}

// --- PackageDefinition.pkl ---
open module PackageDefinition

import "Task.pkl"

tasks: Mapping<String, Mapping<String, Task>>

// --- Task.pkl ---
abstract module Task

name: String

// --- DockerContainerTask.pkl ---
module DockerContainerTask

extends "Task.pkl"

import "DockerNetwork.pkl"

image: String
networks: Listing<DockerNetwork> = new { }

// --- DockerNetworkTask.pkl ---
module DockerNetworkTask

extends "Task.pkl"

import "PackageMetadata.pkl"
import "DockerNetwork.pkl"

driver: String = "bridge"

/// Return this task as a `DockerNetwork`. [package] must be the package this
/// task is defined in.
function asNetwork(package: PackageMetadata.Package) = new DockerNetwork {
    kind = "External"
    name = package.absoluteName("Docker", outer.name)
}

// --- DockerNetwork.pkl ---
module DockerNetwork

typealias NetworkKind = "Internal" | "External"

name: String
kind: NetworkKind = "Internal"

When I evaluate definition.pkl in the internal codebase, I get the following Pkl error (stack trace redacted/modified to fit the code example):

org.pkl.core.PklBugException: An unexpected error has occurred. Would you mind filing a bug report?
Cmd+Double-click the link below to open an issue.
Please copy and paste the entire error output into the issue's description.

https://github.com/apple/pkl/issues/new

java.lang.NullPointerException

–– Pkl Error ––
None (cause has no message)

52 | let (task = provider.toMap().values.filter((t) -> t.name == taskName).firstOrNull)
                                                ^^^^^^^^^^^^^^^^^^^^^^^^^
at PackageMetadata#Package.absoluteName.<function#3> (PackageMetadata.pkl)

52 | let (task = provider.toMap().values.filter((t) -> t.name == taskName).firstOrNull)
                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
at PackageMetadata#Package.absoluteName.<function#1> (PackageMetadata.pkl)

49 | let (provider = definition.tasks.getOrNull(providerName))
     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
at PackageMetadata#Package.absoluteName (PackageMetadata.pkl)

31 | name = Package.absoluteName("Docker", outer.name)
            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
at DockerNetworkTask#asNetwork.name (DockerNetworkTask.pkl)

Pkl 0.30.0-dev+dbcd11da (Linux 6.15.3-cachyos, native)

java.lang.NullPointerException
        at org.pkl.core.ast.expression.member.ReadPropertyNodeGen.executeGeneric(ReadPropertyNodeGen.java:78)
        at org.pkl.core.ast.expression.binary.EqualNodeGen.executeGeneric_generic5(EqualNodeGen.java:205)
        at org.pkl.core.ast.expression.binary.EqualNodeGen.executeGeneric(EqualNodeGen.java:93)
        at org.pkl.core.ast.member.FunctionNode.executeImpl(FunctionNode.java:116)
        at org.pkl.core.ast.PklRootNode.execute(PklRootNode.java:46)
        at org.graalvm.truffle.runtime/com.oracle.truffle.runtime.OptimizedCallTarget.executeRootNode(OptimizedCallTarget.java:776)
        at org.graalvm.truffle.runtime/com.oracle.truffle.runtime.OptimizedCallTarget.profiledPERoot(OptimizedCallTarget.java:700)
        at org.graalvm.truffle.runtime/com.oracle.truffle.runtime.OptimizedCallTarget.callBoundary(OptimizedCallTarget.java:624)
        at org.graalvm.truffle.runtime.svm/com.oracle.svm.truffle.api.SubstrateOptimizedCallTarget.invokeCallBoundary(SubstrateOptimizedCallTarget.java:124)
        at org.graalvm.truffle.runtime.svm/com.oracle.svm.truffle.api.SubstrateOptimizedCallTargetInstalledCode.doInvoke(SubstrateOptimizedCallTargetInstalledCode.java:232)
        at org.graalvm.truffle.runtime.svm/com.oracle.svm.truffle.api.SubstrateOptimizedCallTarget.doInvoke(SubstrateOptimizedCallTarget.java:106)
        at org.graalvm.truffle.runtime/com.oracle.truffle.runtime.OptimizedCallTarget.callDirect(OptimizedCallTarget.java:556)
        at org.graalvm.truffle.runtime/com.oracle.truffle.runtime.OptimizedDirectCallNode.call(OptimizedDirectCallNode.java:94)
        at org.pkl.core.ast.lambda.ApplyVmFunction1Node.evalDirect(ApplyVmFunction1Node.java:80)
        at org.pkl.core.ast.lambda.ApplyVmFunction1NodeGen.execute(ApplyVmFunction1NodeGen.java:71)
        at org.pkl.core.ast.lambda.ApplyVmFunction1Node.executeBoolean(ApplyVmFunction1Node.java:41)
        at org.pkl.core.stdlib.base.ListNodes$filter.eval(ListNodes.java:430)
        at org.pkl.core.stdlib.base.ListNodesFactory$filterNodeGen.executeAndSpecialize(ListNodesFactory.java:3297)
        at org.pkl.core.stdlib.base.ListNodesFactory$filterNodeGen.executeGeneric(ListNodesFactory.java:3286)
        at org.pkl.core.ast.member.FunctionNode.executeImpl(FunctionNode.java:116)
        at org.pkl.core.ast.PklRootNode.execute(PklRootNode.java:46)
        at org.graalvm.truffle.runtime/com.oracle.truffle.runtime.OptimizedCallTarget.executeRootNode(OptimizedCallTarget.java:776)
        at org.graalvm.truffle.runtime/com.oracle.truffle.runtime.OptimizedCallTarget.profiledPERoot(OptimizedCallTarget.java:700)
        at org.graalvm.truffle.runtime/com.oracle.truffle.runtime.OptimizedCallTarget.callBoundary(OptimizedCallTarget.java:624)
        at org.graalvm.truffle.runtime.svm/com.oracle.svm.truffle.api.SubstrateOptimizedCallTarget.invokeCallBoundary(SubstrateOptimizedCallTarget.java:124)
        at org.graalvm.truffle.runtime.svm/com.oracle.svm.truffle.api.SubstrateOptimizedCallTargetInstalledCode.doInvoke(SubstrateOptimizedCallTargetInstalledCode.java:232)
        at org.graalvm.truffle.runtime.svm/com.oracle.svm.truffle.api.SubstrateOptimizedCallTarget.doInvoke(SubstrateOptimizedCallTarget.java:106)
        at org.graalvm.truffle.runtime/com.oracle.truffle.runtime.OptimizedCallTarget.callDirect(OptimizedCallTarget.java:556)
        at org.graalvm.truffle.runtime/com.oracle.truffle.runtime.OptimizedDirectCallNode.call(OptimizedDirectCallNode.java:94)
        at org.pkl.core.ast.expression.member.InvokeMethodVirtualNode.evalCached(InvokeMethodVirtualNode.java:134)
        at org.pkl.core.ast.expression.member.InvokeMethodVirtualNodeGen.executeAndSpecialize(InvokeMethodVirtualNodeGen.java:272)
        at org.pkl.core.ast.expression.member.InvokeMethodVirtualNodeGen.executeGeneric(InvokeMethodVirtualNodeGen.java:193)
        at org.pkl.core.ast.expression.member.ReadPropertyNodeGen.executeGeneric(ReadPropertyNodeGen.java:73)
        at org.pkl.core.ast.expression.binary.LetExprNode.executeGeneric(LetExprNode.java:71)
        at org.pkl.core.ast.expression.ternary.IfElseNode.executeGeneric(IfElseNode.java:49)
        at org.pkl.core.ast.member.FunctionNode.executeImpl(FunctionNode.java:116)
        at org.pkl.core.ast.PklRootNode.execute(PklRootNode.java:46)
        at org.graalvm.truffle.runtime/com.oracle.truffle.runtime.OptimizedCallTarget.executeRootNode(OptimizedCallTarget.java:776)
        at org.graalvm.truffle.runtime/com.oracle.truffle.runtime.OptimizedCallTarget.profiledPERoot(OptimizedCallTarget.java:700)
        at org.graalvm.truffle.runtime/com.oracle.truffle.runtime.OptimizedCallTarget.callBoundary(OptimizedCallTarget.java:624)
        at org.graalvm.truffle.runtime.svm/com.oracle.svm.truffle.api.SubstrateOptimizedCallTarget.invokeCallBoundary(SubstrateOptimizedCallTarget.java:124)
        at org.graalvm.truffle.runtime.svm/com.oracle.svm.truffle.api.SubstrateOptimizedCallTargetInstalledCode.doInvoke(SubstrateOptimizedCallTargetInstalledCode.java:232)
        at org.graalvm.truffle.runtime.svm/com.oracle.svm.truffle.api.SubstrateOptimizedCallTarget.doInvoke(SubstrateOptimizedCallTarget.java:106)
        at org.graalvm.truffle.runtime/com.oracle.truffle.runtime.OptimizedCallTarget.callDirect(OptimizedCallTarget.java:556)
        at org.graalvm.truffle.runtime/com.oracle.truffle.runtime.OptimizedDirectCallNode.call(OptimizedDirectCallNode.java:94)
        at org.pkl.core.ast.expression.binary.LetExprNode.executeGeneric(LetExprNode.java:73)
        at org.pkl.core.ast.member.FunctionNode.executeImpl(FunctionNode.java:116)
        at org.pkl.core.ast.PklRootNode.execute(PklRootNode.java:46)
        at org.graalvm.truffle.runtime/com.oracle.truffle.runtime.OptimizedCallTarget.executeRootNode(OptimizedCallTarget.java:776)
        at org.graalvm.truffle.runtime/com.oracle.truffle.runtime.OptimizedCallTarget.profiledPERoot(OptimizedCallTarget.java:700)
        at org.graalvm.truffle.runtime/com.oracle.truffle.runtime.OptimizedCallTarget.callBoundary(OptimizedCallTarget.java:624)
        at org.graalvm.truffle.runtime.svm/com.oracle.svm.truffle.api.SubstrateOptimizedCallTarget.invokeCallBoundary(SubstrateOptimizedCallTarget.java:124)
        at org.graalvm.truffle.runtime.svm/com.oracle.svm.truffle.api.SubstrateOptimizedCallTargetInstalledCode.doInvoke(SubstrateOptimizedCallTargetInstalledCode.java:232)
        at org.graalvm.truffle.runtime.svm/com.oracle.svm.truffle.api.SubstrateOptimizedCallTarget.doInvoke(SubstrateOptimizedCallTarget.java:106)
        at org.graalvm.truffle.runtime/com.oracle.truffle.runtime.OptimizedCallTarget.callDirect(OptimizedCallTarget.java:556)
        at org.graalvm.truffle.runtime/com.oracle.truffle.runtime.OptimizedDirectCallNode.call(OptimizedDirectCallNode.java:94)
        at org.pkl.core.ast.expression.member.InvokeMethodVirtualNode.evalCached(InvokeMethodVirtualNode.java:134)
        at org.pkl.core.ast.expression.member.InvokeMethodVirtualNodeGen.executeAndSpecialize(InvokeMethodVirtualNodeGen.java:272)
        at org.pkl.core.ast.expression.member.InvokeMethodVirtualNodeGen.executeGeneric(InvokeMethodVirtualNodeGen.java:193)
        at org.pkl.core.ast.member.TypeCheckedPropertyNode.evalTypedObjectCached(TypeCheckedPropertyNode.java:54)
        at org.pkl.core.ast.member.TypeCheckedPropertyNodeGen.executeAndSpecialize(TypeCheckedPropertyNodeGen.java:136)
        at org.pkl.core.ast.member.TypeCheckedPropertyNodeGen.executeImpl(TypeCheckedPropertyNodeGen.java:101)
        at org.pkl.core.ast.PklRootNode.execute(PklRootNode.java:46)
        at org.graalvm.truffle.runtime/com.oracle.truffle.runtime.OptimizedCallTarget.executeRootNode(OptimizedCallTarget.java:776)
        at org.graalvm.truffle.runtime/com.oracle.truffle.runtime.OptimizedCallTarget.profiledPERoot(OptimizedCallTarget.java:700)
        at org.graalvm.truffle.runtime/com.oracle.truffle.runtime.OptimizedCallTarget.callBoundary(OptimizedCallTarget.java:624)
        at org.graalvm.truffle.runtime.svm/com.oracle.svm.truffle.api.SubstrateOptimizedCallTarget.invokeCallBoundary(SubstrateOptimizedCallTarget.java:124)
        at org.graalvm.truffle.runtime.svm/com.oracle.svm.truffle.api.SubstrateOptimizedCallTargetInstalledCode.doInvoke(SubstrateOptimizedCallTargetInstalledCode.java:232)
        at org.graalvm.truffle.runtime.svm/com.oracle.svm.truffle.api.SubstrateOptimizedCallTarget.doInvoke(SubstrateOptimizedCallTarget.java:106)
        at org.graalvm.truffle.runtime/com.oracle.truffle.runtime.OptimizedCallTarget.callDirect(OptimizedCallTarget.java:556)
        at org.graalvm.truffle.runtime/com.oracle.truffle.runtime.OptimizedCallTarget.call(OptimizedCallTarget.java:502)
        at org.graalvm.truffle/com.oracle.truffle.api.nodes.IndirectCallNode$1.call(IndirectCallNode.java:96)
        at org.pkl.core.runtime.VmUtils.doReadMember(VmUtils.java:312)
        at org.pkl.core.runtime.VmUtils.doReadMember(VmUtils.java:214)
        at org.pkl.core.runtime.VmObject.force(VmObject.java:177)
        at org.pkl.core.runtime.VmObject.force(VmObject.java:197)
        at org.pkl.core.runtime.VmValue.force(VmValue.java:67)
        at org.pkl.core.runtime.VmObject.force(VmObject.java:185)
        at org.pkl.core.runtime.VmObject.force(VmObject.java:197)
        at org.pkl.core.runtime.VmValue.force(VmValue.java:67)
        at org.pkl.core.runtime.VmObject.force(VmObject.java:185)
        at org.pkl.core.runtime.VmObject.force(VmObject.java:197)
        at org.pkl.core.runtime.VmValue.force(VmValue.java:67)
        at org.pkl.core.runtime.VmObject.force(VmObject.java:185)
        at org.pkl.core.runtime.VmObject.force(VmObject.java:197)
        at org.pkl.core.runtime.VmValue.force(VmValue.java:67)
        at org.pkl.core.runtime.VmObject.force(VmObject.java:185)
        at org.pkl.core.runtime.VmObject.force(VmObject.java:197)
        at org.pkl.core.runtime.VmValue.force(VmValue.java:67)
        at org.pkl.core.runtime.VmObject.force(VmObject.java:185)
        at org.pkl.core.runtime.VmObject.force(VmObject.java:197)
        at org.pkl.core.runtime.VmValue.force(VmValue.java:67)
        at org.pkl.server.BinaryEvaluator.evaluate$lambda$2(BinaryEvaluator.kt:63)
        at org.pkl.core.EvaluatorImpl.lambda$doEvaluate$15(EvaluatorImpl.java:368)
        at org.pkl.core.EvaluatorImpl.doEvaluate(EvaluatorImpl.java:316)
        at org.pkl.core.EvaluatorImpl.doEvaluate(EvaluatorImpl.java:364)
        at org.pkl.server.BinaryEvaluator.evaluate(BinaryEvaluator.kt:59)
        at org.pkl.server.Server.handleEvaluate$lambda$2(Server.kt:128)
        at java.base@21.0.8/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1144)
        at java.base@21.0.8/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:642)
        at java.base@21.0.8/java.lang.Thread.runWith(Thread.java:1596)
        at java.base@21.0.8/java.lang.Thread.run(Thread.java:1583)
        at org.graalvm.nativeimage.builder/com.oracle.svm.core.thread.PlatformThreads.threadStartRoutine(PlatformThreads.java:896)
        at org.graalvm.nativeimage.builder/com.oracle.svm.core.thread.PlatformThreads.threadStartRoutine(PlatformThreads.java:872)

I dug through the VM code a bit, and it seems at this particular line null is returned:

https://github.com/apple/pkl/blob/3f2f0c3a2bb8e33622754c79aafed5544a38f10a/pkl-core/src/main/java/org/pkl/core/runtime/VmObject.java#L130-L132

Which then results in a Java null which is untrace()able. Indeed, if I enable assertions in jpkl, the assert below it triggers.
I'm not sure what exactly is causing forcing to fail like this, but presumably Pkl should either outright reject the toMap because of the dependency loop (definition -> DockerNetworkTask -> meta -> definition) or allow partial forcing.

Originally created by @sin-ack on GitHub (Aug 20, 2025). Reproduced in Pkl 0.29.0. I don't really have a reproducer for this, as the failure happens in an internal codebase which I am not allowed to share and I haven't been able to create an independent reproduction that exhibits the error. This is an approximation of how the code looks (but does not reproduce the error): ```pkl // --- meta.pkl --- amends "PackageMetadata.pkl" name = "package" packages { ["package"] { meta = (import("meta.pkl")) {} definition = (import("definition.pkl")) {} } } // --- definition.pkl --- extends "PackageDefinition.pkl" import "DockerContainerTask.pkl" import "DockerNetworkTask.pkl" import "meta.pkl" tasks { ["Docker"] { local docker = this ["network"] = new DockerNetworkTask { name = "network" } ["backend"] = new DockerContainerTask { name = "backend" image = "backend" networks { docker["network"].asNetwork(meta.self) } } ["other"] = new DockerContainerTask { name = "other" image = "other" } } } // --- PackageMetadata.pkl --- module PackageMetadata import "PackageDefinition.pkl" import "PackageMetadata.pkl" name: String packages: Mapping<String, Package> hidden fixed self = packages[name] class Package { meta: PackageMetadata definition: PackageDefinition function absoluteName(providerName: String, taskName: String): String = let (provider = definition.tasks.getOrNull(providerName)) if (provider == null) throw("Package '\(this.meta.name)' does not support provider '\(providerName)'") else // v Error happens here, in `filter` let (task = provider.toMap().values.filter((t) -> t.name == taskName).firstOrNull) if (task == null) throw("Package '\(meta.name)' does not contain task '\(taskName)' in provider '\(providerName)'") else "\(meta.name)-\(taskName)" } // --- PackageDefinition.pkl --- open module PackageDefinition import "Task.pkl" tasks: Mapping<String, Mapping<String, Task>> // --- Task.pkl --- abstract module Task name: String // --- DockerContainerTask.pkl --- module DockerContainerTask extends "Task.pkl" import "DockerNetwork.pkl" image: String networks: Listing<DockerNetwork> = new { } // --- DockerNetworkTask.pkl --- module DockerNetworkTask extends "Task.pkl" import "PackageMetadata.pkl" import "DockerNetwork.pkl" driver: String = "bridge" /// Return this task as a `DockerNetwork`. [package] must be the package this /// task is defined in. function asNetwork(package: PackageMetadata.Package) = new DockerNetwork { kind = "External" name = package.absoluteName("Docker", outer.name) } // --- DockerNetwork.pkl --- module DockerNetwork typealias NetworkKind = "Internal" | "External" name: String kind: NetworkKind = "Internal" ``` When I evaluate `definition.pkl` in the internal codebase, I get the following Pkl error (stack trace redacted/modified to fit the code example): ``` org.pkl.core.PklBugException: An unexpected error has occurred. Would you mind filing a bug report? Cmd+Double-click the link below to open an issue. Please copy and paste the entire error output into the issue's description. https://github.com/apple/pkl/issues/new java.lang.NullPointerException –– Pkl Error –– None (cause has no message) 52 | let (task = provider.toMap().values.filter((t) -> t.name == taskName).firstOrNull) ^^^^^^^^^^^^^^^^^^^^^^^^^ at PackageMetadata#Package.absoluteName.<function#3> (PackageMetadata.pkl) 52 | let (task = provider.toMap().values.filter((t) -> t.name == taskName).firstOrNull) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ at PackageMetadata#Package.absoluteName.<function#1> (PackageMetadata.pkl) 49 | let (provider = definition.tasks.getOrNull(providerName)) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ at PackageMetadata#Package.absoluteName (PackageMetadata.pkl) 31 | name = Package.absoluteName("Docker", outer.name) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ at DockerNetworkTask#asNetwork.name (DockerNetworkTask.pkl) Pkl 0.30.0-dev+dbcd11da (Linux 6.15.3-cachyos, native) java.lang.NullPointerException at org.pkl.core.ast.expression.member.ReadPropertyNodeGen.executeGeneric(ReadPropertyNodeGen.java:78) at org.pkl.core.ast.expression.binary.EqualNodeGen.executeGeneric_generic5(EqualNodeGen.java:205) at org.pkl.core.ast.expression.binary.EqualNodeGen.executeGeneric(EqualNodeGen.java:93) at org.pkl.core.ast.member.FunctionNode.executeImpl(FunctionNode.java:116) at org.pkl.core.ast.PklRootNode.execute(PklRootNode.java:46) at org.graalvm.truffle.runtime/com.oracle.truffle.runtime.OptimizedCallTarget.executeRootNode(OptimizedCallTarget.java:776) at org.graalvm.truffle.runtime/com.oracle.truffle.runtime.OptimizedCallTarget.profiledPERoot(OptimizedCallTarget.java:700) at org.graalvm.truffle.runtime/com.oracle.truffle.runtime.OptimizedCallTarget.callBoundary(OptimizedCallTarget.java:624) at org.graalvm.truffle.runtime.svm/com.oracle.svm.truffle.api.SubstrateOptimizedCallTarget.invokeCallBoundary(SubstrateOptimizedCallTarget.java:124) at org.graalvm.truffle.runtime.svm/com.oracle.svm.truffle.api.SubstrateOptimizedCallTargetInstalledCode.doInvoke(SubstrateOptimizedCallTargetInstalledCode.java:232) at org.graalvm.truffle.runtime.svm/com.oracle.svm.truffle.api.SubstrateOptimizedCallTarget.doInvoke(SubstrateOptimizedCallTarget.java:106) at org.graalvm.truffle.runtime/com.oracle.truffle.runtime.OptimizedCallTarget.callDirect(OptimizedCallTarget.java:556) at org.graalvm.truffle.runtime/com.oracle.truffle.runtime.OptimizedDirectCallNode.call(OptimizedDirectCallNode.java:94) at org.pkl.core.ast.lambda.ApplyVmFunction1Node.evalDirect(ApplyVmFunction1Node.java:80) at org.pkl.core.ast.lambda.ApplyVmFunction1NodeGen.execute(ApplyVmFunction1NodeGen.java:71) at org.pkl.core.ast.lambda.ApplyVmFunction1Node.executeBoolean(ApplyVmFunction1Node.java:41) at org.pkl.core.stdlib.base.ListNodes$filter.eval(ListNodes.java:430) at org.pkl.core.stdlib.base.ListNodesFactory$filterNodeGen.executeAndSpecialize(ListNodesFactory.java:3297) at org.pkl.core.stdlib.base.ListNodesFactory$filterNodeGen.executeGeneric(ListNodesFactory.java:3286) at org.pkl.core.ast.member.FunctionNode.executeImpl(FunctionNode.java:116) at org.pkl.core.ast.PklRootNode.execute(PklRootNode.java:46) at org.graalvm.truffle.runtime/com.oracle.truffle.runtime.OptimizedCallTarget.executeRootNode(OptimizedCallTarget.java:776) at org.graalvm.truffle.runtime/com.oracle.truffle.runtime.OptimizedCallTarget.profiledPERoot(OptimizedCallTarget.java:700) at org.graalvm.truffle.runtime/com.oracle.truffle.runtime.OptimizedCallTarget.callBoundary(OptimizedCallTarget.java:624) at org.graalvm.truffle.runtime.svm/com.oracle.svm.truffle.api.SubstrateOptimizedCallTarget.invokeCallBoundary(SubstrateOptimizedCallTarget.java:124) at org.graalvm.truffle.runtime.svm/com.oracle.svm.truffle.api.SubstrateOptimizedCallTargetInstalledCode.doInvoke(SubstrateOptimizedCallTargetInstalledCode.java:232) at org.graalvm.truffle.runtime.svm/com.oracle.svm.truffle.api.SubstrateOptimizedCallTarget.doInvoke(SubstrateOptimizedCallTarget.java:106) at org.graalvm.truffle.runtime/com.oracle.truffle.runtime.OptimizedCallTarget.callDirect(OptimizedCallTarget.java:556) at org.graalvm.truffle.runtime/com.oracle.truffle.runtime.OptimizedDirectCallNode.call(OptimizedDirectCallNode.java:94) at org.pkl.core.ast.expression.member.InvokeMethodVirtualNode.evalCached(InvokeMethodVirtualNode.java:134) at org.pkl.core.ast.expression.member.InvokeMethodVirtualNodeGen.executeAndSpecialize(InvokeMethodVirtualNodeGen.java:272) at org.pkl.core.ast.expression.member.InvokeMethodVirtualNodeGen.executeGeneric(InvokeMethodVirtualNodeGen.java:193) at org.pkl.core.ast.expression.member.ReadPropertyNodeGen.executeGeneric(ReadPropertyNodeGen.java:73) at org.pkl.core.ast.expression.binary.LetExprNode.executeGeneric(LetExprNode.java:71) at org.pkl.core.ast.expression.ternary.IfElseNode.executeGeneric(IfElseNode.java:49) at org.pkl.core.ast.member.FunctionNode.executeImpl(FunctionNode.java:116) at org.pkl.core.ast.PklRootNode.execute(PklRootNode.java:46) at org.graalvm.truffle.runtime/com.oracle.truffle.runtime.OptimizedCallTarget.executeRootNode(OptimizedCallTarget.java:776) at org.graalvm.truffle.runtime/com.oracle.truffle.runtime.OptimizedCallTarget.profiledPERoot(OptimizedCallTarget.java:700) at org.graalvm.truffle.runtime/com.oracle.truffle.runtime.OptimizedCallTarget.callBoundary(OptimizedCallTarget.java:624) at org.graalvm.truffle.runtime.svm/com.oracle.svm.truffle.api.SubstrateOptimizedCallTarget.invokeCallBoundary(SubstrateOptimizedCallTarget.java:124) at org.graalvm.truffle.runtime.svm/com.oracle.svm.truffle.api.SubstrateOptimizedCallTargetInstalledCode.doInvoke(SubstrateOptimizedCallTargetInstalledCode.java:232) at org.graalvm.truffle.runtime.svm/com.oracle.svm.truffle.api.SubstrateOptimizedCallTarget.doInvoke(SubstrateOptimizedCallTarget.java:106) at org.graalvm.truffle.runtime/com.oracle.truffle.runtime.OptimizedCallTarget.callDirect(OptimizedCallTarget.java:556) at org.graalvm.truffle.runtime/com.oracle.truffle.runtime.OptimizedDirectCallNode.call(OptimizedDirectCallNode.java:94) at org.pkl.core.ast.expression.binary.LetExprNode.executeGeneric(LetExprNode.java:73) at org.pkl.core.ast.member.FunctionNode.executeImpl(FunctionNode.java:116) at org.pkl.core.ast.PklRootNode.execute(PklRootNode.java:46) at org.graalvm.truffle.runtime/com.oracle.truffle.runtime.OptimizedCallTarget.executeRootNode(OptimizedCallTarget.java:776) at org.graalvm.truffle.runtime/com.oracle.truffle.runtime.OptimizedCallTarget.profiledPERoot(OptimizedCallTarget.java:700) at org.graalvm.truffle.runtime/com.oracle.truffle.runtime.OptimizedCallTarget.callBoundary(OptimizedCallTarget.java:624) at org.graalvm.truffle.runtime.svm/com.oracle.svm.truffle.api.SubstrateOptimizedCallTarget.invokeCallBoundary(SubstrateOptimizedCallTarget.java:124) at org.graalvm.truffle.runtime.svm/com.oracle.svm.truffle.api.SubstrateOptimizedCallTargetInstalledCode.doInvoke(SubstrateOptimizedCallTargetInstalledCode.java:232) at org.graalvm.truffle.runtime.svm/com.oracle.svm.truffle.api.SubstrateOptimizedCallTarget.doInvoke(SubstrateOptimizedCallTarget.java:106) at org.graalvm.truffle.runtime/com.oracle.truffle.runtime.OptimizedCallTarget.callDirect(OptimizedCallTarget.java:556) at org.graalvm.truffle.runtime/com.oracle.truffle.runtime.OptimizedDirectCallNode.call(OptimizedDirectCallNode.java:94) at org.pkl.core.ast.expression.member.InvokeMethodVirtualNode.evalCached(InvokeMethodVirtualNode.java:134) at org.pkl.core.ast.expression.member.InvokeMethodVirtualNodeGen.executeAndSpecialize(InvokeMethodVirtualNodeGen.java:272) at org.pkl.core.ast.expression.member.InvokeMethodVirtualNodeGen.executeGeneric(InvokeMethodVirtualNodeGen.java:193) at org.pkl.core.ast.member.TypeCheckedPropertyNode.evalTypedObjectCached(TypeCheckedPropertyNode.java:54) at org.pkl.core.ast.member.TypeCheckedPropertyNodeGen.executeAndSpecialize(TypeCheckedPropertyNodeGen.java:136) at org.pkl.core.ast.member.TypeCheckedPropertyNodeGen.executeImpl(TypeCheckedPropertyNodeGen.java:101) at org.pkl.core.ast.PklRootNode.execute(PklRootNode.java:46) at org.graalvm.truffle.runtime/com.oracle.truffle.runtime.OptimizedCallTarget.executeRootNode(OptimizedCallTarget.java:776) at org.graalvm.truffle.runtime/com.oracle.truffle.runtime.OptimizedCallTarget.profiledPERoot(OptimizedCallTarget.java:700) at org.graalvm.truffle.runtime/com.oracle.truffle.runtime.OptimizedCallTarget.callBoundary(OptimizedCallTarget.java:624) at org.graalvm.truffle.runtime.svm/com.oracle.svm.truffle.api.SubstrateOptimizedCallTarget.invokeCallBoundary(SubstrateOptimizedCallTarget.java:124) at org.graalvm.truffle.runtime.svm/com.oracle.svm.truffle.api.SubstrateOptimizedCallTargetInstalledCode.doInvoke(SubstrateOptimizedCallTargetInstalledCode.java:232) at org.graalvm.truffle.runtime.svm/com.oracle.svm.truffle.api.SubstrateOptimizedCallTarget.doInvoke(SubstrateOptimizedCallTarget.java:106) at org.graalvm.truffle.runtime/com.oracle.truffle.runtime.OptimizedCallTarget.callDirect(OptimizedCallTarget.java:556) at org.graalvm.truffle.runtime/com.oracle.truffle.runtime.OptimizedCallTarget.call(OptimizedCallTarget.java:502) at org.graalvm.truffle/com.oracle.truffle.api.nodes.IndirectCallNode$1.call(IndirectCallNode.java:96) at org.pkl.core.runtime.VmUtils.doReadMember(VmUtils.java:312) at org.pkl.core.runtime.VmUtils.doReadMember(VmUtils.java:214) at org.pkl.core.runtime.VmObject.force(VmObject.java:177) at org.pkl.core.runtime.VmObject.force(VmObject.java:197) at org.pkl.core.runtime.VmValue.force(VmValue.java:67) at org.pkl.core.runtime.VmObject.force(VmObject.java:185) at org.pkl.core.runtime.VmObject.force(VmObject.java:197) at org.pkl.core.runtime.VmValue.force(VmValue.java:67) at org.pkl.core.runtime.VmObject.force(VmObject.java:185) at org.pkl.core.runtime.VmObject.force(VmObject.java:197) at org.pkl.core.runtime.VmValue.force(VmValue.java:67) at org.pkl.core.runtime.VmObject.force(VmObject.java:185) at org.pkl.core.runtime.VmObject.force(VmObject.java:197) at org.pkl.core.runtime.VmValue.force(VmValue.java:67) at org.pkl.core.runtime.VmObject.force(VmObject.java:185) at org.pkl.core.runtime.VmObject.force(VmObject.java:197) at org.pkl.core.runtime.VmValue.force(VmValue.java:67) at org.pkl.core.runtime.VmObject.force(VmObject.java:185) at org.pkl.core.runtime.VmObject.force(VmObject.java:197) at org.pkl.core.runtime.VmValue.force(VmValue.java:67) at org.pkl.server.BinaryEvaluator.evaluate$lambda$2(BinaryEvaluator.kt:63) at org.pkl.core.EvaluatorImpl.lambda$doEvaluate$15(EvaluatorImpl.java:368) at org.pkl.core.EvaluatorImpl.doEvaluate(EvaluatorImpl.java:316) at org.pkl.core.EvaluatorImpl.doEvaluate(EvaluatorImpl.java:364) at org.pkl.server.BinaryEvaluator.evaluate(BinaryEvaluator.kt:59) at org.pkl.server.Server.handleEvaluate$lambda$2(Server.kt:128) at java.base@21.0.8/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1144) at java.base@21.0.8/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:642) at java.base@21.0.8/java.lang.Thread.runWith(Thread.java:1596) at java.base@21.0.8/java.lang.Thread.run(Thread.java:1583) at org.graalvm.nativeimage.builder/com.oracle.svm.core.thread.PlatformThreads.threadStartRoutine(PlatformThreads.java:896) at org.graalvm.nativeimage.builder/com.oracle.svm.core.thread.PlatformThreads.threadStartRoutine(PlatformThreads.java:872) ``` I dug through the VM code a bit, and it seems at this particular line `null` is returned: https://github.com/apple/pkl/blob/3f2f0c3a2bb8e33622754c79aafed5544a38f10a/pkl-core/src/main/java/org/pkl/core/runtime/VmObject.java#L130-L132 Which then results in a Java null which is un`trace()`able. Indeed, if I enable assertions in `jpkl`, the `assert` below it triggers. I'm not sure what exactly is causing forcing to fail like this, but presumably Pkl should either outright reject the `toMap` because of the dependency loop (definition -> DockerNetworkTask -> meta -> definition) or allow partial forcing.

adam commented 2025-12-30 01:23:40 +01:00

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@sin-ack commented on GitHub (Aug 20, 2025):

(FWIW, substituting Mapping.toMap().values.filter with Mapping.fold() works as expected, so it's toMap's forcing in particular that's messing up somewhere.)

@sin-ack commented on GitHub (Aug 20, 2025): (FWIW, substituting `Mapping.toMap().values.filter` with `Mapping.fold()` works as expected, so it's `toMap`'s forcing in particular that's messing up somewhere.)

adam commented 2025-12-30 01:23:40 +01:00

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@bioball commented on GitHub (Aug 26, 2025):

Thanks for the bug report. It's a little hard to figure out the root cause without a reproducer, so, definitely let us know if you find one.

@bioball commented on GitHub (Aug 26, 2025): Thanks for the bug report. It's a little hard to figure out the root cause without a reproducer, so, definitely let us know if you find one.

adam referenced this issue 2025-12-30 01:25:02 +01:00

[PR #337] [MERGED] docs: feat TOML #509

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Reference: starred/pkl#337