Wrong tracebacks : pyzo is affected by ipython issue #13598 #1213
Description
My students use Pyzo 4.19.0 (I reproduced in 4.20 too) with IPython 8.27.0 and there is a problem with the display of tracebacks.
If I type this in a tab
def f(x) :
x = x + 1
x // 0then execute (Ctrl+E) and run f(5) in the console, I correctly get
In [2]: f(5)
---------------------------------------------------------------------------
ZeroDivisionError Traceback (most recent call last)
File <ipython-input-2-fb48ebfde7ea>:1
----> 1 f(5)
File <tmp 1>:3, in f(x)
1 def f(x) :
2 x = x + 1
----> 3 x // 0
ZeroDivisionError: integer division or modulo by zero
However, if I then modify the code of f to
def f(x) :
x = x + 1
y = 7
x // 0then execute (Ctrl+E) again and run f(5) in the console, I get
In [4]: f(5)
---------------------------------------------------------------------------
ZeroDivisionError Traceback (most recent call last)
File <ipython-input-4-fb48ebfde7ea>:1
----> 1 f(5)
File <tmp 1>:4, in f(x)
0 <Error retrieving source code with stack_data see ipython/ipython#13598>
ZeroDivisionError: integer division or modulo by zero
Sometimes, one does not get this error, but the traceback will claim the exception was thrown on an incorrect line (due to another line having been added since the first version of the code) and this is, legitimately, confusing students (it destroy the whole purpose of a traceback !).
This refers to an issue at IPython that seems convoluted (too much for me).
Restarting the shell allows to eschew this, but this is quite impractical.
Also, on my hoe computer, running Linux, Pyzo 4.19.0 and iPython 8.20.0, things to work well. That is, in the second phase of my example, I get
In [4]: f(5)
---------------------------------------------------------------------------
ZeroDivisionError Traceback (most recent call last)
File <ipython-input-4-fb48ebfde7ea>:1
----> 1 f(5)
File <tmp 1>:4, in f(x)
2 x = x + 1
3 y = 7
----> 4 x // 0
ZeroDivisionError: integer division or modulo by zero