Something wrong with GC

[rikki cattermole via Digitalmars-d-learn]

On 20/03/16 8:49 PM, stunaep wrote:
> The gc throws invalid memory errors if I use Arrays from std.container.
> For example, this throws an InvalidMemoryOperationError:
>> import std.stdio;
>> import std.container;
>>
>> void main() {
>>     new Test();
>> }
>>
>> class Test {
>>
>>     private Array!string test = Array!string();
>>
>>     this() {
>>         test.insert("test");
>>         writeln(test[0]);
>>     }
>> }
>
> and here's the stack trace
>
>>     testt.exe!app.onInvalidMemoryOperationError( void* _param_0 ) Line
>> 21    D
>>     testt.exe!_D2gc2gc2GC134__T9runLockedS57_D2gc2gc2GC11removeRangeMFNbNiPvZ2goFNbNiPS2gc2gc3GcxPvZvS19_D2gc2gc9otherTimelS19_D2gc2gc9numOtherslTPS2gc2gc3GcxTPvZ9runLockedMFNbNiKPS2gc2gc3GcxKPvZv()
>> + 0x52 bytes    D
>>     testt.exe!_D2gc2gc2GC11removeRangeMFNbNiPvZv() + 0x29 bytes    D
>>     testt.exe!gc_removeRange() + 0x21 bytes    D
>>     testt.exe!_D4core6memory2GC11removeRangeFNbNixPvZv() + 0xd bytes    D
>>     testt.exe!std.container.array.Array!string.Array.Payload.~this()
>> Line 229 + 0x1f bytes    D
>>     testt.exe!object._destructRecurse!(std.container.array.Array!string.Array.Payload)._destructRecurse(
>> std.container.array.Array!string.Array.Payload* s ) Line 2409 + 0xd
>> bytes    D
>>     testt.exe!object.destroy!(std.container.array.Array!string.Array.Payload).destroy(
>> std.container.array.Array!string.Array.Payload* obj ) Line 2778 + 0xd
>> bytes    D
>>     testt.exe!std.typecons.RefCounted!(std.container.array.Array!string.Array.Payload,
>> cast(RefCountedAutoInitialize)0).RefCounted.~this() Line 4864 + 0x10
>> bytes    D
>>     testt.exe!std.container.array.Array!string.Array.~this() Line 198
>> + 0x15 bytes    D
>>     testt.exe!app.Test.~this() Line 10 + 0x19 bytes    D
>>     testt.exe!rt_finalize2() + 0xb8 bytes    D
>>     testt.exe!rt_finalizeFromGC() + 0x24 bytes    D
>>     testt.exe!_D2gc2gc3Gcx5sweepMFNbZm() + 0x3a3 bytes    D
>>     testt.exe!_D2gc2gc3Gcx11fullcollectMFNbbZm() + 0x57a bytes    D
>>     testt.exe!_D2gc2gc2GC86__T9runLockedS56_D2gc2gc2GC18fullCollectNoStackMFNbZ2goFNbPS2gc2gc3GcxZmTPS2gc2gc3GcxZ9runLockedMFNbKPS2gc2gc3GcxZm()
>> + 0x72 bytes    D
>>     testt.exe!_D2gc2gc2GC18fullCollectNoStackMFNbZv() + 0x11 bytes    D
>>     testt.exe!gc_term() + 0x14 bytes    D
>>     testt.exe!rt_term() + 0x9e bytes    D
>>     testt.exe!_D2rt6dmain211_d_run_mainUiPPaPUAAaZiZ6runAllMFZv() +
>> 0x4d bytes    D
>>     testt.exe!_D2rt6dmain211_d_run_mainUiPPaPUAAaZiZ7tryExecMFMDFZvZv() +
>> 0x6f bytes    D
>>     testt.exe!_d_run_main() + 0x419 bytes    D
>>     testt.exe!__entrypoint.main( int argc, char** argv ) + 0x22
>> bytes    D
>>     testt.exe!__tmainCRTStartup() Line 255 + 0x12 bytes    D
>>     kernel32.dll!0000000076cd59cd
>>     ntdll.dll!0000000076f0b891
>
> Not sure what to do here

That looks like an error indeed.
But move the initialization of Array into the constructor.

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