mathbb support

[aheze]

Seems like \mathbb{} renders nothing. Other commands like \mathit{} work fine.

This shows in the console:

Error: this application, or a library it uses, has passed an invalid numeric value (NaN, or not-a-number) to CoreGraphics API and this value is being ignored. Please fix this problem.

[aheze]

Backtrace:

Backtrace:
  <_ZN12_GLOBAL__N_118transform_is_validEPK17CGAffineTransform+76>
   <CGPathCreateMutableCopyByTransformingPath+72>
    <$s9SwiftDraw10CGProviderV10createPath4from2at4withSo9CGPathRefaSgSS_AA9LayerTreeO5PointVAL14TextAttributesVtF+372>
     <$s9SwiftDraw10CGProviderVAA20RendererTypeProviderA2aDP10createPath4from2at4with5Types_0H0QZSgSS_AA9LayerTreeO5PointVAO14T
      <$s9SwiftDraw9LayerTreeO16CommandGeneratorC14renderCommands3for2at10attributes14colorConverterSayAA08RendererE0Oy5TypesQz
       <$s9SwiftDraw9LayerTreeO16CommandGeneratorC14renderCommands3for14colorConverterSayAA08RendererE0Oy5TypesQzGGAC0C0C8Conte
        <$s9SwiftDraw9LayerTreeO16CommandGeneratorC14renderCommands3for14colorConverterSayAA08RendererE0Oy5TypesQzGGAC0C0C_AA05
         <$s9SwiftDraw9LayerTreeO16CommandGeneratorC14renderCommands3for14colorConverterSayAA08RendererE0Oy5TypesQzGGAC0C0C8Con
          <$s9SwiftDraw9LayerTreeO16CommandGeneratorC14renderCommands3for14colorConverterSayAA08RendererE0Oy5TypesQzGGAC0C0C_AA
           <$s9SwiftDraw9LayerTreeO16CommandGeneratorC14renderCommands3for14colorConverterSayAA08RendererE0Oy5TypesQzGGAC0C0C8C
            <$s9SwiftDraw9LayerTreeO16CommandGeneratorC14renderCommands3for14colorConverterSayAA08RendererE0Oy5TypesQzGGAC0C0C_
             <$s9SwiftDraw9LayerTreeO16CommandGeneratorC14renderCommands3for14colorConverterSayAA08RendererE0Oy5TypesQzGGAC0C0C
              <$s9SwiftDraw9LayerTreeO16CommandGeneratorC14renderCommands3for14colorConverterSayAA08RendererE0Oy5TypesQzGGAC0C0
               <$s9SwiftDraw9LayerTreeO16CommandGeneratorC14renderCommands3for14colorConverterSayAA08RendererE0Oy5TypesQzGGAC0C
                <$s9SwiftDraw9LayerTreeO16CommandGeneratorC14renderCommands3for14colorConverterSayAA08RendererE0Oy5TypesQzGGAC0
                 <$s9SwiftDraw9LayerTreeO16CommandGeneratorC14renderCommands3for14colorConverterSayAA08RendererE0Oy5TypesQzGGAC
                  <$s9SwiftDraw9LayerTreeO16CommandGeneratorC14renderCommands3for14colorConverterSayAA08RendererE0Oy5TypesQzGGA
                   <$s9SwiftDraw3SVGC3dom7optionsAcA3DOMOABC_AC7OptionsVtcfc+664>
                    <$s9SwiftDraw3SVGC3dom7optionsAcA3DOMOABC_AC7OptionsVtcfC+48>
                     <$s9SwiftDraw3SVGC4data7optionsACSg10Foundation4DataV_AC7OptionsVtcfC+240>
                      <$sSo7UIImageC9SwiftDrawE7svgDataABSg10Foundation0E0V_tcfc+104>
                       <$sSo7UIImageC9SwiftDrawE7svgDataABSg10Foundation0E0V_tcfcTo+52>
                        <$sSo7UIImageC9SwiftDrawE7svgDataABSg10Foundation0E0V_tcfC+76>
                         <$s12LaTeXTesting11ContentViewV4bodyQrvgyycfU0_+1612>
                          <OUTLINED_FUNCTION_14+28>
                           <OUTLINED_FUNCTION_14+56>
                            <OUTLINED_FUNCTION_14+28>
                             <OUTLINED_FUNCTION_16+16084>
                              <OUTLINED_FUNCTION_16+14088>
                               <OUTLINED_FUNCTION_16+7860>
                                <OUTLINED_FUNCTION_20+43072>
                                 <OUTLINED_FUNCTION_20+43144>
                                  <-[UIView(CALayerDelegate) layoutSublayersOfLayer:]+1492>
                                   <_ZN2CA5Layer16layout_if_neededEPNS_11TransactionE+440>
                                    <_ZN2CA5Layer28layout_and_display_if_neededEPNS_11TransactionE+124>
                                     <_ZN2CA7Context18commit_transactionEPNS_11TransactionEdPd+460>
                                      <_ZN2CA11Transaction6commitEv+652>
                                       <__34-[UIApplication _firstCommitBlock]_block_invoke_2+32>
                                        <__CFRUNLOOP_IS_CALLING_OUT_TO_A_BLOCK__+20>
                                         <__CFRunLoopDoBlocks+352>
                                          <__CFRunLoopRun+788>
                                           <CFRunLoopRunSpecific+572>
                                            <GSEventRunModal+160>
                                             <-[UIApplication _run]+868>
                                              <UIApplicationMain+124>
                                               <OUTLINED_FUNCTION_65+492>
                                               <OUTLINED_FUNCTION_65+148>
                                               <OUTLINED_FUNCTION_0+92>
                                               <$s12LaTeXTesting0abC3AppV5$mainyyFZ+40>
                                               <main+12>
                                               1033b5544
                                               1034560e0                                               db38800000000000