Serhiy Storchaka added the comment:
I can reproduce warnings in Modules/_posixsubprocess.c:
gcc -pthread -fPIC -Wno-unused-result -Wsign-compare -DNDEBUG -g -fwrapv -O3
-Wall -Wstrict-prototypes -std=c99 -Wextra -Wno-unused-result
-Wno-unused-parameter -Wno-missing-field-initializers -Wstrict-overflow
-I./Include -I. -I/usr/include/i386-linux-gnu -I/usr/local/include
-I/home/serhiy/py/cpython/Include -I/home/serhiy/py/cpython -c
/home/serhiy/py/cpython/Modules/_posixsubprocess.c -o
build/temp.linux-i686-3.7/home/serhiy/py/cpython/Modules/_posixsubprocess.o
/home/serhiy/py/cpython/Modules/_posixsubprocess.c: In function ‘child_exec’:
/home/serhiy/py/cpython/Modules/_posixsubprocess.c:524:33: warning: assuming
pointer wraparound does not occur when comparing P +- C1 with P +- C2
[-Wstrict-overflow]
while (saved_errno != 0 && cur > hex_errno) {
^
/home/serhiy/py/cpython/Modules/_posixsubprocess.c: In function
‘subprocess_fork_exec’:
/home/serhiy/py/cpython/Modules/_posixsubprocess.c:524:33: warning: assuming
pointer wraparound does not occur when comparing P +- C1 with P +- C2
[-Wstrict-overflow]
while (saved_errno != 0 && cur > hex_errno) {
^
/home/serhiy/py/cpython/Modules/_posixsubprocess.c:544:1: warning: assuming
pointer wraparound does not occur when comparing P +- C1 with P +- C2
[-Wstrict-overflow]
subprocess_fork_exec(PyObject* self, PyObject *args)
^
/home/serhiy/py/cpython/Modules/_posixsubprocess.c:544:1: warning: assuming
pointer wraparound does not occur when comparing P +- C1 with P +- C2
[-Wstrict-overflow]
/home/serhiy/py/cpython/Modules/_posixsubprocess.c:524:33: warning: assuming
pointer wraparound does not occur when comparing P +- C1 with P +- C2
[-Wstrict-overflow]
while (saved_errno != 0 && cur > hex_errno) {
^
/home/serhiy/py/cpython/Modules/_posixsubprocess.c:524:33: warning: assuming
pointer wraparound does not occur when comparing P +- C1 with P +- C2
[-Wstrict-overflow]
Proposed simple patch fixes this.
----------
assignee: -> serhiy.storchaka
keywords: +patch
resolution: wont fix ->
stage: resolved -> patch review
status: closed -> open
versions: +Python 3.6, Python 3.7
Added file: http://bugs.python.org/file44820/issue20947.patch
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<http://bugs.python.org/issue20947>
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