AutoIt3 Crash with exitcode c0000005 when using StringRegExp

[genius257]

This script makes AutoIt3 crash when calling StringRegExp:

#include "DllStructEx.au3"

$tagVARIANT = _
"  union {"& _
"    struct {"& _
"      VARTYPE vt;"& _
"      WORD    wReserved1;"& _
"      WORD    wReserved2;"& _
"      WORD    wReserved3;"& _
"      union {"& _
"        LONGLONG     llVal;"& _
"        LONG         lVal;"& _
"        BYTE         bVal;"& _
"        SHORT        iVal;"& _
"        FLOAT        fltVal;"& _
"        DOUBLE       dblVal;"& _
"        VARIANT_BOOL boolVal;"& _
"        VARIANT_BOOL __OBSOLETE__VARIANT_BOOL;"& _
"        SCODE        scode;"& _
"        CY           cyVal;"& _
"        DATE         date;"& _
"        BSTR         bstrVal;"& _
"        IUnknown     *punkVal;"& _
"        IDispatch    *pdispVal;"& _
"        SAFEARRAY    *parray;"& _
"        BYTE         *pbVal;"& _
"        SHORT        *piVal;"& _
"        LONG         *plVal;"& _
"        LONGLONG     *pllVal;"& _
"        FLOAT        *pfltVal;"& _
"        DOUBLE       *pdblVal;"& _
"        VARIANT_BOOL *pboolVal;"& _
"        VARIANT_BOOL *__OBSOLETE__VARIANT_PBOOL;"& _
"        SCODE        *pscode;"& _
"        CY           *pcyVal;"& _
"        DATE         *pdate;"& _
"        BSTR         *pbstrVal;"& _
"        IUnknown     **ppunkVal;"& _
"        IDispatch    **ppdispVal;"& _
"        SAFEARRAY    **pparray;"& _
"        VARIANT      *pvarVal;"& _
"        PVOID        byref;"& _
"        CHAR         cVal;"& _
"        USHORT       uiVal;"& _
"        ULONG        ulVal;"& _
"        ULONGLONG    ullVal;"& _
"        INT          intVal;"& _
"        UINT         uintVal;"& _
"        DECIMAL      *pdecVal;"& _
"        CHAR         *pcVal;"& _
"        USHORT       *puiVal;"& _
"        ULONG        *pulVal;"& _
"        ULONGLONG    *pullVal;"& _
"        INT          *pintVal;"& _
"        UINT         *puintVal;"& _
"        struct {"& _
"          PVOID       pvRecord;"& _
"          IRecordInfo *pRecInfo;"& _
"        } __VARIANT_NAME_4;"& _
"      } __VARIANT_NAME_3;"& _
"    } __VARIANT_NAME_2;"& _
"    DECIMAL decVal;"& _
"  } __VARIANT_NAME_1;"

$tagDECIMAL = _
  "USHORT wReserved;"& _
  "union {"& _
  "  struct {"& _
  "    BYTE scale;"& _
  "    BYTE sign;"& _
  "  } DUMMYSTRUCTNAME;"& _
  "  USHORT signscale;"& _
  "} DUMMYUNIONNAME;"& _
  "ULONG  Hi32;"& _
  "union {"& _
  "  struct {"& _
  "    ULONG Lo32;"& _
  "    ULONG Mid32;"& _
  "  } DUMMYSTRUCTNAME2;"& _
  "  ULONGLONG Lo64;"& _
  "} DUMMYUNIONNAME2;"

$typeVARTYPE = "USHORT"
$typeLONGLONG = "INT64"

$txVariant = DllStructExCreate($tagVARIANT)

The line where AutoIt3 crashes: https://github.com/genius257/DllStructEx/blob/745044772b81b7cc7d2a01cb6350ca7bbe537920/DllStructEx.au3#L774

The exit code is c0000005, indicating a memory pointer issue in AutoIt3

tested with AutoIt3.3.16.0

[genius257]

So this is still an issue in 3.3.16.1. Due to the failing code seeming to be internal AutoIt code, the solution seems to be to change parsing from regular expressions, to manual char based parsing implemented in pure AutoIt