[dogfood] The name of the file devtools/front_end/DebuggerProtocol.js becomes "undefined" about qpp HOT 1 OPEN

Seems like at least in this case 'undefined' string come from eval

0 0x000055555917a607 in WebCore::ScriptDebugServer::handleV8DebugEvent (this=0x7ffff7edf6e0,
eventDetails=...) at ../../third_party/WebKit/Source/bindings/v8/ScriptDebugServer.cpp:568
#1 0x0000555559179fc6 in WebCore::ScriptDebugServer::v8DebugEventCallback (eventDetails=...)
at ../../third_party/WebKit/Source/bindings/v8/ScriptDebugServer.cpp:511
#2 0x0000555559e804a1 in v8::internal::Debugger::CallCEventCallback (this=0x3060a256f220,
event=v8::BeforeCompile, exec_state=..., event_data=..., client_data=0x0) at ../../v8/src/debug.cc:2949
#3 0x0000555559e803e7 in v8::internal::Debugger::CallEventCallback (this=0x3060a256f220,
event=v8::BeforeCompile, exec_state=..., event_data=..., client_data=0x0) at ../../v8/src/debug.cc:2928
#4 0x0000555559e802b7 in v8::internal::Debugger::ProcessDebugEvent (this=0x3060a256f220,
event=v8::BeforeCompile, event_data=..., auto_continue=true) at ../../v8/src/debug.cc:2905
#5 0x0000555559e7fc9f in v8::internal::Debugger::OnBeforeCompile (this=0x3060a256f220, script=...)
at ../../v8/src/debug.cc:2773
#6 0x0000555559e6ae8b in v8::internal::MakeFunctionInfo (info=0x7fffffffb4d0)
at ../../v8/src/compiler.cc:518
#7 0x0000555559e6bc16 in v8::internal::Compiler::CompileEval (source=..., context=..., is_global=true,
language_mode=v8::internal::CLASSIC_MODE, restriction=v8::internal::NO_PARSE_RESTRICTION,
scope_position=-1) at ../../v8/src/compiler.cc:714
#8 0x000055555a097552 in v8::internal::Runtime_CompileString (args=..., isolate=0x7ffff7e9d020)
at ../../v8/src/runtime.cc:864

from qpp.