What does this error mean: CGIR assertion 'index>=0 && index<fSize' failed in 'util_prim​/cg_assert​.cpp:28'

During Code Generation the following error appears:

CGIR assertion 'index>=0 && index<fSize' failed in 'util_prim/cg_assert.cpp:28'
[  0] 0xb75d400f              /opt/matlab/v26/bin/glnx86/libmwfl.so+00155663 _ZN2fl4diag15stacktrace_base7captureEj+000039
[  1] 0x994fa6c1        /opt/matlab/v26/bin/glnx86/libmwsimulink.so+09889473
[  2] 0x97f94370           /opt/matlab/v26/bin/glnx86/libmwcg_ir.so+02343792 _Z23client_assertion_failedPKciS0_+000054
[  3] 0x97f943a5           /opt/matlab/v26/bin/glnx86/libmwcg_ir.so+02343845 _Z32client_assertion_failed_internalPKc+000047
[  4] 0x97ef46c5           /opt/matlab/v26/bin/glnx86/libmwcg_ir.so+01689285 _ZNK2CG10StructType9fieldTypeEi+000049
[  5] 0x96edb8f3  /opt/matlab/v26/bin/glnx86/libmwcgir_construct.so+00370931 _ZN5RTWCG14PropagateSizes13propMemberRefEPN2CG4NodeERNS_9RTWCGTypeE+000171
[  6] 0x96db760a           /opt/matlab/v26/bin/glnx86/libmwrtwcg.so+01136138
[  7] 0x96da9995           /opt/matlab/v26/bin/glnx86/libmwrtwcg.so+01079701
[  8] 0x96daaa35           /opt/matlab/v26/bin/glnx86/libmwrtwcg.so+01083957
[  9] 0x96dab821           /opt/matlab/v26/bin/glnx86/libmwrtwcg.so+01087521 _ZN5RTWCG13DataConnector7replaceEPN2CG7VarExprERNS_12RTWCGFactoryE+000283
[ 10] 0x96dabf7a           /opt/matlab/v26/bin/glnx86/libmwrtwcg.so+01089402 _ZN5RTWCG21RTWCGConnectBlockDataEPN2CG3FcnEPNS_10RTWContextE+001750
[ 11] 0x96dac737           /opt/matlab/v26/bin/glnx86/libmwrtwcg.so+01091383 _ZN5RTWCG21RTWCGConnectBlockDataEPN2CG5ScopeEPNS_10RTWContextE+000194
[ 12] 0x96e33e08           /opt/matlab/v26/bin/glnx86/libmwrtwcg.so+01646088 _ZN5RTWCG11RTWFcnConst19OptimizeAndEmitCodeEiPNS_14TLCOutPortInfoERNS_11RTWCGVectorIiEE+002214
[ 13] 0x96dd604f           /opt/matlab/v26/bin/glnx86/libmwrtwcg.so+01261647 _ZN5RTWCG11RTWCGModule19OptimizeAndEmitCodeEiPNS_14TLCOutPortInfoE+000141
[ 14] 0x997a5b46        /opt/matlab/v26/bin/glnx86/libmwsimulink.so+12688198
[ 15] 0x997a04ce        /opt/matlab/v26/bin/glnx86/libmwsimulink.so+12666062

The model is compiled under Linux 32bit simulink/matlab 2011 with grt target. The same model compiled fine under simulink/matlab 2009 with a different target. The error disappears when I remove a part where a rather big bus-object is used, can this be the problem?

[Kaustubha Govind]

Seems like a bug. Please report this to MathWorks Tech Support.

Answer 1

[Sven]

Ok, thanks for your answer. I think i found the Problem on my own. It seems to be a problem if an element in a bus object is called 'std'. Wasn't a problem till now. But that's easy to fix.

So, maybe somebody wants to reproduce this:

elem = Simulink.BusElement;
elem.Name  = 'std';           
elem.Dimensions  = 1;    
elem.DataType  = 'double';        
elem.SampleTime = -1;
elem.Complexity = 'real';
elem.SamplingMode = 'Sample based';

bus = Simulink.Bus;
bus.HeaderFile = '';
bus.Description = sprintf('');
bus.Elements = elem;
assignin('base', 'bus_test', bus);

Then i created a new Simulink-Model and there a new Stateflow-model. In the Stateflow Model I created an Output data element with the Datatype "Bus:bus_test". It runs perfectly fine in simulation but code genereation with GRT fails with the error above.

Answer 2

[Friedrich]

Hi,

related to:

http://www.mathworks.com/support/bugreports/757615

STD is a reserved function name, like gamma.

[Sven]

Oha. Thanks. i swear i tried to search before i posted:) Don't know how i could miss that.

Answer 3

[Walter Roberson]

The message means that the code detected that the index of something is negative or is beyond the size of what is being indexed. What it is that is being indexed is unknown to me.

Is it possible that the bus-object is more than 2 gigabytes? If so then a "signed" 32 bit index value could appear negative.

Is the 2009 release that you are using a 64 bit release?