Wt

This is driving me crazy! I've rebuilt my whole environment and project from scratch at least 3 times today, boost, Wt, etc and I can't get rid of this exception. This is a project that was working earlier this year. The only change I made was upgrading to the new version of Xcode 13. It worked on 12. Before I back level to 12 (who knows if it will still work), is this something simple I'm missing? I'm guessing something around std:: libraries.

Here's the code:

SOutputModel::SSOutputModel(const std::shared_ptr<Wt::WStandardItemModel> &sourceSeries) : inputLayer(0,0){

    int numRows = sourceSeries->rowCount();
    int numColumns = sourceSeries->columnCount();
    int i,j = 0;

    for(i=0; i<numRows; i++){
        for(j=0;j<numColumns;j++) {
            // make sure you skip the header row in sourceSeries
          inputLayer(i,j) = asNumber(sourceSeries->data(i+1,j,ItemDataRole::Display));
        }
    }

}

It crashes when it gets to the inputLayer(i,j) line.
It "crashes" by destroying the current session, then immediately starts a new session.

Another clue is the IDE spits out the following strange message.

error: /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX11.3.sdk/usr/include/c++/v1/string:1630:10: 'std::basic_string, std::allocator>::move_assign' from module 'std.iosfwd' is not present in definition of 'std::basic_string, std::allocator>' provided earlier
void __move_assign(basic_string& __str, false_type)
^
note: declaration of 'move_assign' does not match

note: declaration of '__move_assign' does not match

If I step "in to" the inputLayer line above, it crashes right after it gets out of the asNumber library routine (double asNumber(const cpp17::any& v)) when it enters matrix.h and does a range check. (matrix.h is Stroustrup's library template header)