I go this error from a large library

ERROR: Recursion detected calling function 'len'

It is very difficult to find where the error is because it is a recursive
function that calls len, not len itself and many recursive functions call
len. I ended up doing a binary chop of my test code to find the regression.

It seems to me that when the stack overflows it needs to show more context.
At the very least if the function that detects it is a built in it should
pop that and print the function or module that called it.

"It seems to me that when the stack overflows it needs to show more context.
At the very least if the function that detects it is a built in it should
pop that and print the function or module that called it."

Or maybe show the most common 10 things in the stack, or the top 10-15 or
something.

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