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Description of problem:
Currently, python tracebacks shows the last of continuation lines
when a function spans across multiple lines. This line usually
contains some function parameter only and thus is not very useful
for debugging the problem.
For example:
Traceback (most recent call last):
File "./tcms-run", line 48, in <module>
summary=options.summary)
File "/home/psss/git/tcms/Nitrate.py", line 600, in __init__
raise NitrateError("Need either id or test plan")
If the traceback contained the beginning of the continuation line
it would be IMHO much more clear where/how the problem happened.
Traceback (most recent call last):
File "./tcms-run", line 48, in <module>
run = TestRun(plan=plan, distro=options.distro,
File "/home/psss/git/tcms/Nitrate.py", line 600, in __init__
raise NitrateError("Need either id or test plan")
Version-Release number of selected component (if applicable):
python-2.6.6-20.el6.x86_64
Trivial reproducer:
def fun1(par):
raise Exception
def fun2():
fun1(
par="value")
fun2()
Actual results:
Traceback (most recent call last):
File "/tmp/traceback.py", line 10, in <module>
fun2()
File "/tmp/traceback.py", line 8, in fun2
par="value")
File "/tmp/traceback.py", line 4, in fun1
raise Exception
Exception
The printing code in question is within Python/traceback.c
It uses the tb->tb_lineno of a PyTracebackObject to determine which line to print, and tb_lineno is in fact exposed to Python code; see:
http://docs.python.org/library/traceback.html
It's set up in newtracebackobject (called by PyTraceBack_Here(PyFrameObject *frame)) based on the last bytecode being executed within the frame:
PyCode_Addr2Line(frame->f_code,
frame->f_lasti)
Comment 3RHEL Program Management
2011-07-01 00:15:04 UTC
Development Management has reviewed and declined this request. You may appeal
this decision by reopening this request.
Description of problem: Currently, python tracebacks shows the last of continuation lines when a function spans across multiple lines. This line usually contains some function parameter only and thus is not very useful for debugging the problem. For example: Traceback (most recent call last): File "./tcms-run", line 48, in <module> summary=options.summary) File "/home/psss/git/tcms/Nitrate.py", line 600, in __init__ raise NitrateError("Need either id or test plan") If the traceback contained the beginning of the continuation line it would be IMHO much more clear where/how the problem happened. Traceback (most recent call last): File "./tcms-run", line 48, in <module> run = TestRun(plan=plan, distro=options.distro, File "/home/psss/git/tcms/Nitrate.py", line 600, in __init__ raise NitrateError("Need either id or test plan") Version-Release number of selected component (if applicable): python-2.6.6-20.el6.x86_64 Trivial reproducer: def fun1(par): raise Exception def fun2(): fun1( par="value") fun2() Actual results: Traceback (most recent call last): File "/tmp/traceback.py", line 10, in <module> fun2() File "/tmp/traceback.py", line 8, in fun2 par="value") File "/tmp/traceback.py", line 4, in fun1 raise Exception Exception