Hitting Debug.breakpoint with chrome inspector fails with NullPointerException

[Akirathan]

Run the following code:

from Standard.Base import all

main =
    txt = "Hello"
    Standard.Base.Runtime.Debug.breakpoint
    IO.println "DONE"

with:

enso --inspect --run tmp.enso

And attach chrome inspector. Then just click on continue in the inspector. Then, there will be unexpected failure:

Debugger listening on ws://127.0.0.1:9229/enso_debug
For help, see: https://www.graalvm.org/tools/chrome-debugger
E.g. in Chrome open: devtools://devtools/bundled/js_app.html?ws=127.0.0.1:9229/enso_debug
/home/pavel/tmp/tmp.enso:4:5: warning: Unused variable txt.
    4 |     txt = "Hello"
      |     ^~~
WARNING: Instrumented node DebugBreakpointNodeGen@3c488b34 of class class org.enso.interpreter.node.expression.builtin.debug.DebugBreakpointNodeGen has null SourceSection.WARNING: and null encapsulating SourceSection under DebugBreakpointMethodGen@32e697ac of class = class org.enso.interpreter.node.expression.builtin.debug.DebugBreakpointMethodGenExecution finished with an error: java.lang.NullPointerException: Cannot invoke "com.oracle.truffle.api.source.SourceSection.getSource()" because "ss" is null
        at <java> com.oracle.truffle.tools.chromeinspector/com.oracle.truffle.tools.chromeinspector.InspectorDebugger$SuspendedCallbackImpl.onSuspend(InspectorDebugger.java:1104)
        at <java> org.graalvm.truffle/com.oracle.truffle.api.debug.DebuggerSession.doSuspend(DebuggerSession.java:1307)
        at <java> org.graalvm.truffle/com.oracle.truffle.api.debug.DebuggerSession.processBreakpointsAndStep(DebuggerSession.java:1275)
        at <java> org.graalvm.truffle/com.oracle.truffle.api.debug.DebuggerSession.notifyCallback(DebuggerSession.java:1081)
        at <java> org.graalvm.truffle/com.oracle.truffle.api.debug.Breakpoint.doBreak(Breakpoint.java:883)
        at <java> org.graalvm.truffle/com.oracle.truffle.api.debug.Breakpoint.doBreak(Breakpoint.java:831)
        at <java> org.graalvm.truffle/com.oracle.truffle.api.debug.Breakpoint$AbstractBreakpointNode.onNode(Breakpoint.java:1470)
        at <java> org.graalvm.truffle/com.oracle.truffle.api.debug.Breakpoint$BreakpointBeforeNode.onEnter(Breakpoint.java:1285)
        at <java> org.graalvm.truffle/com.oracle.truffle.api.instrumentation.ProbeNode$EventProviderChainNode.innerOnEnter(ProbeNode.java:1499)
        at <java> org.graalvm.truffle/com.oracle.truffle.api.instrumentation.ProbeNode$EventChainNode.onEnter(ProbeNode.java:980)
        at <java> org.graalvm.truffle/com.oracle.truffle.api.instrumentation.ProbeNode.onEnter(ProbeNode.java:226)
        at <java> org.enso.runtime/org.enso.interpreter.node.expression.builtin.debug.DebugBreakpointNodeWrapper.execute(DebugBreakpointNodeWrapper.java:44)
        at <java> org.enso.runtime/org.enso.interpreter.node.expression.builtin.debug.DebugBreakpointMethodGen.execute(DebugBreakpointMethodGen.java:101)
        at <enso> Debug.breakpoint(Internal)
        at <enso> tmp.main(tmp.enso:5:5-42)

Expected behavior

The expression Standard.Base.Runtime.Debug.breakpoint should behave exactly like setting a breakpoint in chrome inspector directly in the file.

[JaroslavTulach]

Fixed by #11594