Dart VM optimizing reg. allocator crash "./vm/growable_array.h:55: error: expected: 0 <= index"

/sources/dartall/dart/xcodebuild/DebugIA32/dart --optimization_counter_threshold=5 /sources/dartall/dart/xcodebuild/DebugIA32/generated_tests/language/cast_test_none.dart

­3 0x00002aa1 in dart::DynamicAssertionHelper::Fail (this=0xbfffe2b4, format=0x2138a0 "expected: %s") at /sources/dartall/dart/runtime/platform/assert.cc:40

­4 0x000e0e49 in dart::BaseGrowableArray<dart::LiveRange*, dart::ValueObject>::operator[](this=0xbfffe670, index=-1) at growable_array.h:55

­5 0x000da099 in dart::FlowGraphAllocator::GetLiveRange (this=0xbfffe610, vreg=-1) at /sources/dartall/dart/runtime/vm/flow_graph_allocator.cc:394

­6 0x000dccbf in dart::FlowGraphAllocator::ProcessOneInstruction (this=0xbfffe610, block=0x9115f0, current=0x953170) at /sources/dartall/dart/runtime/vm/flow_graph_allocator.cc:788

­7 0x000df354 in dart::FlowGraphAllocator::BuildLiveRanges (this=0xbfffe610) at /sources/dartall/dart/runtime/vm/flow_graph_allocator.cc:516

­8 0x000e039a in dart::FlowGraphAllocator::AllocateRegisters (this=0xbfffe610) at /sources/dartall/dart/runtime/vm/flow_graph_allocator.cc:2150

­9 0x000bbebb in dart::CompileParsedFunctionHelper (parsed_function=@0xbfffea4c, optimized=true) at /sources/dartall/dart/runtime/vm/compiler.cc:232

[mraleph]

Constant propagation created a constant without an SSA index, which is not something that could previously occur in the graph.

Fixed by r12848

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Added Fixed label.