I have a segfault in the 3.10 alpha 4 when running the reportlab document generation; all the other tests seem to have
worked. I would like to ask experts here how to approach getting the location of the problem. I run recent archlinux.
Below is the output of a test run with -Xdev -Xtracemalloc; the main process is almost finished so the error appears to
come from trying to free resources
$ python -Xdev -Xtracemalloc genuserguide.py
/home/robin/devel/reportlab/.py310/lib/python3.10/distutils/__init__.py:1: DeprecationWarning: the imp module is deprecated in favour of importlib; see the module's documentation for alternative uses
import imp
Built story contains 1843 flowables...
Saved "/home/robin/devel/reportlab/REPOS/reportlab/docs/reportlab-userguide.pdf"
[ Top 10 ]
<frozen importlib._bootstrap_external>:630: size=10.5 MiB, count=105832,
average=104 B
/home/robin/devel/reportlab/reportlab/lib/abag.py:19: size=7161 KiB,
count=27126, average=270 B
/home/robin/devel/reportlab/reportlab/platypus/paraparser.py:3141: size=3364
KiB, count=5980, average=576 B
/home/robin/devel/reportlab/.py310/lib/python3.10/site-packages/pyphen/__init__.py:160:
size=2905 KiB, count=41797, average=71 B
/home/robin/devel/reportlab/reportlab/platypus/paragraph.py:776: size=1386 KiB,
count=32208, average=44 B
/home/robin/devel/reportlab/reportlab/platypus/paragraph.py:92: size=1384 KiB,
count=26248, average=54 B
/home/robin/devel/reportlab/.py310/lib/python3.10/copy.py:280: size=1232 KiB,
count=8827, average=143 B
/home/robin/devel/reportlab/reportlab/platypus/frames.py:155: size=1101 KiB,
count=1173, average=962 B
<frozen importlib._bootstrap>:241: size=915 KiB, count=8146, average=115 B
/home/robin/devel/reportlab/reportlab/platypus/paragraph.py:773: size=881 KiB,
count=16104, average=56 B
sys:1: ResourceWarning: unclosed file <_io.BufferedReader
name='../images/replogo.gif'>
sys:1: ResourceWarning: unclosed file <_io.BufferedReader
name='../images/testimg.gif'>
Debug memory block at address p=0x5617c33effe0: API ''
0 bytes originally requested
The 7 pad bytes at p-7 are not all FORBIDDENBYTE (0xfd):
at p-7: 0x00 *** OUCH
at p-6: 0x00 *** OUCH
at p-5: 0x00 *** OUCH
at p-4: 0x00 *** OUCH
at p-3: 0x00 *** OUCH
at p-2: 0x00 *** OUCH
at p-1: 0x00 *** OUCH
Because memory is corrupted at the start, the count of bytes requested
may be bogus, and checking the trailing pad bytes may segfault.
The 8 pad bytes at tail=0x5617c33effe0 are not all FORBIDDENBYTE (0xfd):
at tail+0: 0x00 *** OUCH
at tail+1: 0x00 *** OUCH
at tail+2: 0x00 *** OUCH
at tail+3: 0x00 *** OUCH
at tail+4: 0x00 *** OUCH
at tail+5: 0x00 *** OUCH
at tail+6: 0x00 *** OUCH
at tail+7: 0x00 *** OUCH
Enable tracemalloc to get the memory block allocation traceback
Fatal Python error: _PyMem_DebugRawFree: bad ID: Allocated using API '',
verified using API 'o'
Python runtime state: finalizing (tstate=0x5617c53c8b30)
Current thread 0x00007fd5742b3740 (most recent call first):
<no Python frame>
Aborted (core dumped)
for comparison here is the 3.9.1 output> $ python -Xdev -Xtracemalloc
genuserguide.py
/home/robin/devel/reportlab/.py39/lib/python3.9/distutils/__init__.py:1:
DeprecationWarning: the imp module is deprecated in favour of importlib; see
the module's documentation for alternative uses
import imp
/home/robin/devel/reportlab/.py39/lib/python3.9/site-packages/fontTools/misc/py23.py:11:
DeprecationWarning: The py23 module has been deprecated and will be removed in
the next release. Please update your code.
warnings.warn(
Built story contains 1843 flowables...
Saved "/home/robin/devel/reportlab/REPOS/reportlab/docs/reportlab-userguide.pdf"
[ Top 10 ]
<frozen importlib._bootstrap_external>:587: size=12.4 MiB, count=128010,
average=102 B
/home/robin/devel/reportlab/reportlab/lib/abag.py:19: size=7132 KiB,
count=26951, average=271 B
/home/robin/devel/reportlab/reportlab/platypus/paraparser.py:3141: size=3364
KiB, count=5980, average=576 B
/home/robin/devel/reportlab/.py39/lib/python3.9/site-packages/pyphen/__init__.py:160:
size=2905 KiB, count=41797, average=71 B
/home/robin/devel/reportlab/reportlab/platypus/paragraph.py:776: size=1386 KiB,
count=32208, average=44 B
/home/robin/devel/reportlab/reportlab/platypus/paragraph.py:92: size=1384 KiB,
count=26248, average=54 B
/home/robin/devel/reportlab/.py39/lib/python3.9/copy.py:279: size=1230 KiB,
count=8827, average=143 B
/home/robin/devel/reportlab/reportlab/platypus/frames.py:155: size=1039 KiB,
count=957, average=1112 B
<frozen importlib._bootstrap>:228: size=959 KiB, count=8503, average=116 B
/home/robin/devel/reportlab/reportlab/platypus/paragraph.py:773: size=881 KiB,
count=16104, average=56 B
sys:1: ResourceWarning: unclosed file <_io.BufferedReader
name='../images/replogo.gif'>
sys:1: ResourceWarning: unclosed file <_io.BufferedReader
name='../images/testimg.gif'>
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