Dict functions reported as meaningless numbers in "Error detected while processing function" messages

Considering the following error (from https://github.com/scrooloose/syntastic/issues/539):
Error detected while processing function <SNR>89_UpdateErrors..<SNR>89_CacheErrors..39..45:
line 6:
E714: List required
Dict functions on the stack are reported as meaningless numbers, which makes it impossible to track down the code where the error happens.

Would it be possible to find a better representation for dict functions?

David

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