Hi.
With my Trac 0.10.6 I am getting a reproduce-able error while uploading
specific files as attachments to a ticket:
"SystemError: Objects/stringobject.c:3516: bad argument to internal
function"
I have configured "[attachment] max_size" to be over 1 megabyte. And the
problematic file is only 240KB.
Amazingly it seems to be the file contents which causes the error. A
file filled with 240000 null-bytes causes the error. A file with 240000
random bytes does not:
Test with 240.000 zero bytes:
-> Upload as Trac-attachment -> ERROR
Test with 240.000 zero bytes,
but manually inserted a line-break in the middle of the file:
-> Upload as Trac-attachment -> OK
Test with 240.000 random bytes:
-> Upload as Trac-attachment -> OK
Test with 220.000 zero bytes:
-> Upload as Trac-attachment -> OK
Searching in the official Trac-Ticket database did not deliver anything.
Is there anybody else who can reproduce this problem with Trac 0.10 or
maybe even with 0.11? If yes, then I would file a ticket for this.
This is how I made the test files:
dd if=/dev/zero of=zero_240000.test bs=1 count=240000
dd if=/dev/zero of=zero_220000.test bs=1 count=220000
dd if=/dev/urandom of=rand_240000.test bs=1 count=240000
My guess is that Trac is trying to read the large binary file
line-by-line like a text file. If the line is getting too large
(somewhere at 240.000 characters) then it fails.
As a workaround I can ZIP the problematic file(s).
Clemens
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