Crash when step over the last statement in main.

[DartBot]

This issue was originally filed by [email protected]

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import('dart:html');

main() {
  print('main');
}

1. Set breakpoint on "print('main');"
2. Reload the page
3. Hit "step over"
4. Renderer crashes

­0 0xf082a430 in __kernel_vsyscall ()

­1 0xef73d921 in *__GI_raise (sig=6)

    at ../nptl/sysdeps/unix/sysv/linux/raise.c:64

­2 0xef740d52 in *__GI_abort () at abort.c:92

­3 0xf5103564 in dart::DynamicAssertionHelper::Fail (this=0xffff9dc4, format=

    0xf7cd9869 "expected: %s") at dart/runtime/platform/assert.cc:41

­4 0xf5019a9b in dart::RawFunction::ptr (this=0xf86723c0)

    at dart/runtime/vm/raw_object.h:545

­5 0xf501b9f7 in dart::Function::raw_ptr (this=0xffffa494)

    at dart/runtime/vm/object.h:1492

­6 0xf503fe24 in dart::Function::HasCode (this=0xffffa494)

    at dart/runtime/vm/object.h:4911

­7 0xf5047cd4 in dart::Debugger::InstrumentForStepping (this=0xf866eea0,

    target_function=...) at dart/runtime/vm/debugger.cc:567

­8 0xf504945b in dart::Debugger::BreakpointCallback (this=0xf866eea0)

    at dart/runtime/vm/debugger.cc:997

­9 0xf511a73c in dart::DRT_HelperBreakpointStaticHandler (isolate=0xf867f600,

    arguments=...) at dart/runtime/vm/code_generator.cc:875

­10 0xf511a609 in dart::DRT_BreakpointStaticHandler (arguments=...)

    at dart/runtime/vm/code_generator.cc:871

­11 0xeb3c0052 in ?? ()

­12 0xeb3c05d9 in ?? ()

­13 0xe86c044c in ?? ()

­14 0xe86c006d in ?? ()

­15 0xf50447ca in dart::DartEntry::InvokeStatic (function=..., arguments=...,

    optional_arguments_names=...) at dart/runtime/vm/dart_entry.cc:82

­16 0xf501277a in dart::Dart_Invoke (target=0xf85b0430, name=0xf85b0428,

    number_of_arguments=0, arguments=0x0)
    at dart/runtime/vm/dart_api_impl.cc:2546

­17 0xf3757954 in WebCore::DartApplicationLoader::callEntryPoint (this=

    0xf85aa930)
    at third_party/WebKit/Source/WebCore/bindings/dart/DartApplicationLoader.cpp:240

[DartBot]

This comment was originally written by @mhausner

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I cannot reproduce this in the standalone debugger.

Q: Does "reload page" cause the creation of a new isolate, loding the source, and setting the breakpoint before main is called? Could the Dartium debugger refer to a VM object that gets destroyed as part of the page reload?

[DartBot]

This comment was originally written by [email protected]

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I couldn't reproduce it anymore, most probably fixed by recent changes in debugger.

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Added Fixed label.