Lots of new compiler warnings

[sobolevn]

In file included from ./Include/internal/pycore_global_objects.h:12:
./Include/internal/pycore_gc.h:230:21: warning: implicit conversion changes signedness: 'int' to 'uintptr_t' (aka 'unsigned long') [-Wsign-conversion]
 gc->_gc_prev &= ~_PyGC_PREV_MASK_FINALIZED;
 ~~ ^~~~~~~~~~~~~~~~~~~~~~~~~~

In file included from ./Include/internal/pycore_code.h:13:
./Include/internal/pycore_backoff.h:78:66: warning: implicit conversion loses integer precision: 'int' to 'uint16_t' (aka 'unsigned short') [-Wimplicit-int-conversion]
 return make_backoff_counter((1 << (counter.backoff + 1)) - 1, counter.backoff + 1);
 ~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~

In file included from ./Include/internal/pycore_mimalloc.h:45:
./Include/internal/mimalloc/mimalloc/internal.h:489:84: warning: implicit conversion changes signedness: 'int' to 'mi_thread_free_t' (aka 'unsigned long') [-Wsign-conversion]
 return (mi_block_t*)(mi_atomic_load_relaxed(&((mi_page_t*)page)->xthread_free) & ~3);
 ~ ^~
./Include/internal/mimalloc/mimalloc/internal.h:508:29: warning: implicit conversion changes signedness: 'int' to 'mi_thread_free_t' (aka 'unsigned long') [-Wsign-conversion]
 return (mi_block_t*)(tf & ~0x03);
 ~ ^~~~~
./Include/internal/mimalloc/mimalloc/internal.h:806:10: warning: implicit conversion changes signedness: 'int' to 'size_t' (aka 'unsigned long') [-Wsign-conversion]
 return __builtin_clzl(x);
 ~~~~~~ ^~~~~~~~~~~~~~~~~
./Include/internal/mimalloc/mimalloc/internal.h:814:10: warning: implicit conversion changes signedness: 'int' to 'size_t' (aka 'unsigned long') [-Wsign-conversion]
 return __builtin_ctzl(x);
 ~~~~~~ ^~~~~~~~~~~~~~~~~
./Modules/getpath.c:264:48: warning: implicit conversion changes signedness: 'Py_ssize_t' (aka 'long') to 'unsigned long' [-Wsign-conversion]
 wchar_t **parts = (wchar_t **)PyMem_Malloc(n * sizeof(wchar_t *));
 ^ ~
./Modules/getpath.c:269:22: warning: implicit conversion changes signedness: 'Py_ssize_t' (aka 'long') to 'unsigned long' [-Wsign-conversion]
 memset(parts, 0, n * sizeof(wchar_t *));
 ^ ~
/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/secure/_string.h:77:33: note: expanded from macro 'memset'
 __builtin___memset_chk (dest, __VA_ARGS__, __darwin_obsz0 (dest))
 ^~~~~~~~~~~
./Modules/getpath.c:295:61: warning: implicit conversion changes signedness: 'Py_ssize_t' (aka 'long') to 'unsigned long' [-Wsign-conversion]
 wchar_t *final = cchFinal > 0 ? (wchar_t *)PyMem_Malloc(cchFinal * sizeof(wchar_t)) : NULL;
 ^~~~~~~~ ~
./Modules/getpath.c:318:57: warning: implicit conversion changes signedness: 'Py_ssize_t' (aka 'long') to 'size_t' (aka 'unsigned long') [-Wsign-conversion]
 } else if (_Py_add_relfile(final, parts[i], cchFinal) < 0){
 ~~~~~~~~~~~~~~~ ^~~~~~~~
./Modules/getpath.c:385:63: warning: implicit conversion changes signedness: 'size_t' (aka 'unsigned long') to 'Py_ssize_t' (aka 'long') [-Wsign-conversion]
 wchar_t *wbuffer = _Py_DecodeUTF8_surrogateescape(buffer, cb, &len);
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ^~
./Modules/getpath.c:663:43: warning: implicit conversion changes signedness: 'size_t' (aka 'unsigned long') to 'Py_ssize_t' (aka 'long') [-Wsign-conversion]
 u = PyUnicode_FromWideChar(w, len);
 ~~~~~~~~~~~~~~~~~~~~~~ ^~~
./Modules/getpath.c:707:43: warning: implicit conversion changes signedness: 'size_t' (aka 'unsigned long') to 'Py_ssize_t' (aka 'long') [-Wsign-conversion]
 u = PyUnicode_FromWideChar(w, len);
 ~~~~~~~~~~~~~~~~~~~~~~ ^~~
13 warnings generated.

Related #123020

Linked PRs

• gh-124064: Make warning emitting compiler options opt-in #124070
• gh-124064: Fix some -Wconversion warnings #124174
• gh-124064: Fix -Wconversion warnings in pycore_{long,object}.h #124177
• gh-124064: Fix -Wconversion warnings in Parser/pegen.c #124181
• gh-124064: Fix -Wconversion warnings in Parser/string_parser.c #124204
• [3.13] gh-124064: Fix -Wconversion warnings in Parser/string_parser.c (GH-124204) #124216

[sobolevn]

Oh, I get 100s of warnings:

gcc -c -fno-strict-overflow -Wsign-compare -g -Og -Wall -I/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include -I/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include -fstack-protector-strong -Wconversion -Wimplicit-fallthrough -Werror=format-security -Wall -std=c11 -Wextra -Wno-unused-parameter -Wno-missing-field-initializers -Wstrict-prototypes -Werror=implicit-function-declaration -fvisibility=hidden -I./Include/internal -I./Include/internal/mimalloc -I. -I./Include -I/opt/homebrew/opt/openssl/include -I/opt/homebrew/opt/openssl/include -DPy_BUILD_CORE -o Objects/bytes_methods.o Objects/bytes_methods.c
Objects/bytes_methods.c:256:21: warning: implicit conversion changes signedness: 'const unsigned char' to 'char' [-Wsign-conversion]
 result[i] = Py_TOLOWER((unsigned char) cptr[i]);
 ~ ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
./Include/cpython/pyctype.h:32:24: note: expanded from macro 'Py_TOLOWER'
#define Py_TOLOWER(c) (_Py_ctype_tolower[Py_CHARMASK(c)])
 ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Objects/bytes_methods.c:272:21: warning: implicit conversion changes signedness: 'const unsigned char' to 'char' [-Wsign-conversion]
 result[i] = Py_TOUPPER((unsigned char) cptr[i]);
 ~ ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
./Include/cpython/pyctype.h:33:24: note: expanded from macro 'Py_TOUPPER'
#define Py_TOUPPER(c) (_Py_ctype_toupper[Py_CHARMASK(c)])
 ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Objects/bytes_methods.c:301:21: warning: implicit conversion loses integer precision: 'int' to 'char' [-Wimplicit-int-conversion]
 *result++ = c;
 ~ ^
Objects/bytes_methods.c:316:19: warning: implicit conversion changes signedness: 'const unsigned char' to 'char' [-Wsign-conversion]
 *result = Py_TOUPPER(*s);
 ~ ^~~~~~~~~~~~~~
./Include/cpython/pyctype.h:33:24: note: expanded from macro 'Py_TOUPPER'
#define Py_TOUPPER(c) (_Py_ctype_toupper[Py_CHARMASK(c)])
 ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Objects/bytes_methods.c:336:23: warning: implicit conversion changes signedness: 'const unsigned char' to 'char' [-Wsign-conversion]
 *result = Py_TOUPPER(c);
 ~ ^~~~~~~~~~~~~
./Include/cpython/pyctype.h:33:24: note: expanded from macro 'Py_TOUPPER'
#define Py_TOUPPER(c) (_Py_ctype_toupper[Py_CHARMASK(c)])
 ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Objects/bytes_methods.c:339:23: warning: implicit conversion changes signedness: 'const unsigned char' to 'char' [-Wsign-conversion]
 *result = Py_TOLOWER(c);
 ~ ^~~~~~~~~~~~~
./Include/cpython/pyctype.h:32:24: note: expanded from macro 'Py_TOLOWER'
#define Py_TOLOWER(c) (_Py_ctype_tolower[Py_CHARMASK(c)])
 ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Objects/bytes_methods.c:342:23: warning: implicit conversion loses integer precision: 'int' to 'char' [-Wimplicit-int-conversion]
 *result = c;
 ~ ^
In file included from Objects/bytes_methods.c:387:
Objects/stringlib/fastsearch.h:58:42: warning: implicit conversion changes signedness: 'Py_ssize_t' (aka 'long') to 'unsigned long' [-Wsign-conversion]
 p = STRINGLIB_FAST_MEMCHR(s, ch, n);
 ~~~~~~~~~~~~~~~~~~~~~ ^
Objects/stringlib/fastsearch.h:336:42: warning: implicit conversion changes signedness: 'Py_ssize_t' (aka 'long') to 'unsigned long' [-Wsign-conversion]
 p->cut * STRINGLIB_SIZEOF_CHAR));
 ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
Objects/stringlib/fastsearch.h:348:27: warning: implicit conversion changes signedness: 'const char' to 'unsigned int' [-Wsign-conversion]
 STRINGLIB_CHAR last = needle[len_needle - 1] & TABLE_MASK;
 ^~~~~~~~~~~~~~~~~~~~~~ ~
Objects/stringlib/fastsearch.h:350:28: warning: implicit conversion changes signedness: 'const char' to 'unsigned int' [-Wsign-conversion]
 STRINGLIB_CHAR x = needle[i] & TABLE_MASK;
 ^~~~~~~~~ ~
Objects/stringlib/fastsearch.h:365:18: warning: implicit conversion changes signedness: 'const char' to 'unsigned int' [-Wsign-conversion]
 p->table[needle[i] & TABLE_MASK] = shift;
 ^~~~~~~~~ ~
Objects/stringlib/fastsearch.h:395:43: warning: implicit conversion changes signedness: 'const char' to 'unsigned int' [-Wsign-conversion]
 Py_ssize_t shift = table[(*window_last) & TABLE_MASK];
 ^~~~~~~~~~~~ ~
Objects/stringlib/fastsearch.h:407:21: warning: implicit conversion changes signedness: 'const char' to 'unsigned int' [-Wsign-conversion]
 assert((window[len_needle - 1] & TABLE_MASK) ==
 ^~~~~~~~~~~~~~~~~~~~~~ ~
/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/assert.h:99:25: note: expanded from macro 'assert'
 (__builtin_expect(!(e), 0) ? __assert_rtn(__func__, __ASSERT_FILE_NAME, __LINE__, #e) : (void)0)
 ^
In file included from Objects/bytes_methods.c:387:
Objects/stringlib/fastsearch.h:408:21: warning: implicit conversion changes signedness: 'const char' to 'unsigned int' [-Wsign-conversion]
 (needle[len_needle - 1] & TABLE_MASK));
 ^~~~~~~~~~~~~~~~~~~~~~ ~
/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/assert.h:99:25: note: expanded from macro 'assert'
 (__builtin_expect(!(e), 0) ? __assert_rtn(__func__, __ASSERT_FILE_NAME, __LINE__, #e) : (void)0)
 ^
In file included from Objects/bytes_methods.c:387:
Objects/stringlib/fastsearch.h:434:47: warning: implicit conversion changes signedness: 'const char' to 'unsigned int' [-Wsign-conversion]
 Py_ssize_t shift = table[(*window_last) & TABLE_MASK];
 ^~~~~~~~~~~~ ~
Objects/stringlib/fastsearch.h:460:43: warning: implicit conversion changes signedness: 'const char' to 'unsigned int' [-Wsign-conversion]
 Py_ssize_t shift = table[(*window_last) & TABLE_MASK];
 ^~~~~~~~~~~~ ~
Objects/stringlib/fastsearch.h:471:21: warning: implicit conversion changes signedness: 'const char' to 'unsigned int' [-Wsign-conversion]
 assert((window[len_needle - 1] & TABLE_MASK) ==
 ^~~~~~~~~~~~~~~~~~~~~~ ~
/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/assert.h:99:25: note: expanded from macro 'assert'
 (__builtin_expect(!(e), 0) ? __assert_rtn(__func__, __ASSERT_FILE_NAME, __LINE__, #e) : (void)0)
 ^
In file included from Objects/bytes_methods.c:387:
Objects/stringlib/fastsearch.h:472:21: warning: implicit conversion changes signedness: 'const char' to 'unsigned int' [-Wsign-conversion]
 (needle[len_needle - 1] & TABLE_MASK));
 ^~~~~~~~~~~~~~~~~~~~~~ ~
/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/assert.h:99:25: note: expanded from macro 'assert'
 (__builtin_expect(!(e), 0) ? __assert_rtn(__func__, __ASSERT_FILE_NAME, __LINE__, #e) : (void)0)
 ^
Objects/bytes_methods.c:623:36: warning: implicit conversion changes signedness: 'Py_ssize_t' (aka 'long') to 'unsigned long' [-Wsign-conversion]
 return memchr(str, (int) ival, len) != NULL;
 ~~~~~~ ^~~
Objects/bytes_methods.c:666:34: warning: implicit conversion changes signedness: 'Py_ssize_t' (aka 'long') to 'unsigned long' [-Wsign-conversion]
 if (memcmp(str + start, sub, slen) != 0)
 ~~~~~~ ^~~~
21 warnings generated.
gcc -c -fno-strict-overflow -Wsign-compare -g -Og -Wall -I/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include -I/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include -fstack-protector-strong -Wconversion -Wimplicit-fallthrough -Werror=format-security -Wall -std=c11 -Wextra -Wno-unused-parameter -Wno-missing-field-initializers -Wstrict-prototypes -Werror=implicit-function-declaration -fvisibility=hidden -I./Include/internal -I./Include/internal/mimalloc -I. -I./Include -I/opt/homebrew/opt/openssl/include -I/opt/homebrew/opt/openssl/include -DPy_BUILD_CORE -o Objects/bytearrayobject.o Objects/bytearrayobject.c
In file included from Objects/bytearrayobject.c:7:
In file included from ./Include/internal/pycore_ceval.h:13:
In file included from ./Include/internal/pycore_interp.h:16:
In file included from ./Include/internal/pycore_code.h:11:
In file included from ./Include/internal/pycore_stackref.h:11:
In file included from ./Include/internal/pycore_object_deferred.h:8:
./Include/internal/pycore_gc.h:230:21: warning: implicit conversion changes signedness: 'int' to 'uintptr_t' (aka 'unsigned long') [-Wsign-conversion]
 gc->_gc_prev &= ~_PyGC_PREV_MASK_FINALIZED;
 ~~ ^~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from Objects/bytearrayobject.c:7:
In file included from ./Include/internal/pycore_ceval.h:13:
In file included from ./Include/internal/pycore_interp.h:16:
In file included from ./Include/internal/pycore_code.h:13:
./Include/internal/pycore_backoff.h:78:66: warning: implicit conversion loses integer precision: 'int' to 'uint16_t' (aka 'unsigned short') [-Wimplicit-int-conversion]
 return make_backoff_counter((1 << (counter.backoff + 1)) - 1, counter.backoff + 1);
 ~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~
In file included from Objects/bytearrayobject.c:7:
In file included from ./Include/internal/pycore_ceval.h:13:
In file included from ./Include/internal/pycore_interp.h:31:
In file included from ./Include/internal/pycore_mimalloc.h:45:
./Include/internal/mimalloc/mimalloc/internal.h:489:84: warning: implicit conversion changes signedness: 'int' to 'mi_thread_free_t' (aka 'unsigned long') [-Wsign-conversion]
 return (mi_block_t*)(mi_atomic_load_relaxed(&((mi_page_t*)page)->xthread_free) & ~3);
 ~ ^~
./Include/internal/mimalloc/mimalloc/internal.h:508:29: warning: implicit conversion changes signedness: 'int' to 'mi_thread_free_t' (aka 'unsigned long') [-Wsign-conversion]
 return (mi_block_t*)(tf & ~0x03);
 ~ ^~~~~
./Include/internal/mimalloc/mimalloc/internal.h:806:10: warning: implicit conversion changes signedness: 'int' to 'size_t' (aka 'unsigned long') [-Wsign-conversion]
 return __builtin_clzl(x);
 ~~~~~~ ^~~~~~~~~~~~~~~~~
./Include/internal/mimalloc/mimalloc/internal.h:814:10: warning: implicit conversion changes signedness: 'int' to 'size_t' (aka 'unsigned long') [-Wsign-conversion]
 return __builtin_ctzl(x);
 ~~~~~~ ^~~~~~~~~~~~~~~~~
In file included from Objects/bytearrayobject.c:8:
./Include/internal/pycore_object.h:445:58: warning: implicit conversion changes signedness: 'int' to 'uintptr_t' (aka 'unsigned long') [-Wsign-conversion]
 gc->_gc_next = ((uintptr_t)generation0) | interp->gc.visited_space;
 ~ ~~~~~~~~~~~^~~~~~~~~~~~~
./Include/internal/pycore_object.h:763:54: warning: implicit conversion changes signedness: 'int' to 'unsigned long' [-Wsign-conversion]
 _PyType_HasFeature(tp, Py_TPFLAGS_PREHEADER) * 2 * sizeof(PyObject *)
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~ ~
./Include/internal/pycore_object.h:761:9: warning: implicit conversion changes signedness: 'int' to 'unsigned long' [-Wsign-conversion]
 _PyType_IS_GC(tp) * sizeof(PyGC_Head) +
 ^~~~~~~~~~~~~~~~~ ~
./Include/internal/pycore_object.h:754:26: note: expanded from macro '_PyType_IS_GC'
#define _PyType_IS_GC(t) _PyType_HasFeature((t), Py_TPFLAGS_HAVE_GC)
 ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
./Include/internal/pycore_object.h:824:40: warning: implicit conversion changes signedness: 'Py_ssize_t' (aka 'long') to 'unsigned long' [-Wsign-conversion]
 assert(tp->tp_basicsize > 0 && tp->tp_basicsize % sizeof(PyObject *) == 0);
 ~~~~^~~~~~~~~~~~ ~
/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/assert.h:99:25: note: expanded from macro 'assert'
 (__builtin_expect(!(e), 0) ? __assert_rtn(__func__, __ASSERT_FILE_NAME, __LINE__, #e) : (void)0)
 ^
In file included from Objects/bytearrayobject.c:10:
./Include/internal/pycore_long.h:274:29: warning: implicit conversion changes signedness: 'int' to 'size_t' (aka 'unsigned long') [-Wsign-conversion]
 op->long_value.lv_tag = TAG_FROM_SIGN_AND_SIZE(sign, (size_t)size);
 ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
./Include/internal/pycore_long.h:266:48: note: expanded from macro 'TAG_FROM_SIGN_AND_SIZE'
#define TAG_FROM_SIGN_AND_SIZE(sign, size) ((1 - (sign)) | ((size) << NON_SIZE_BITS))
 ~~^~~~~~~~ ~
./Include/internal/pycore_long.h:289:30: warning: implicit conversion changes signedness: 'int' to 'uintptr_t' (aka 'unsigned long') [-Wsign-conversion]
 op->long_value.lv_tag &= NON_SIZE_MASK;
 ~~ ^~~~~~~~~~~~~
./Include/internal/pycore_long.h:284:23: note: expanded from macro 'NON_SIZE_MASK'
#define NON_SIZE_MASK ~((1 << NON_SIZE_BITS) - 1)
 ^~~~~~~~~~~~~~~~~~~~~~~~~~~
Objects/bytearrayobject.c:40:14: warning: implicit conversion loses integer precision: 'long' to 'int' [-Wshorten-64-to-32]
 *value = face_value;
 ~ ^~~~~~~~~~
Objects/bytearrayobject.c:135:38: warning: implicit conversion changes signedness: 'Py_ssize_t' (aka 'long') to 'size_t' (aka 'unsigned long') [-Wsign-conversion]
 new->ob_bytes = PyMem_Malloc(alloc);
 ~~~~~~~~~~~~ ^~~~~
Objects/bytearrayobject.c:202:31: warning: implicit conversion changes signedness: 'size_t' (aka 'unsigned long') to 'Py_ssize_t' (aka 'long') [-Wsign-conversion]
 Py_SET_SIZE(self, size);
 ~~~~~~~~~~~~~~~~~~^~~~~
./Include/object.h:299:69: note: expanded from macro 'Py_SET_SIZE'
# define Py_SET_SIZE(ob, size) Py_SET_SIZE(_PyVarObject_CAST(ob), (size))
 ~~~~~~~~~~~ ^~~~
Objects/bytearrayobject.c:242:23: warning: implicit conversion changes signedness: 'size_t' (aka 'unsigned long') to 'Py_ssize_t' (aka 'long') [-Wsign-conversion]
 Py_SET_SIZE(self, size);
 ~~~~~~~~~~~~~~~~~~^~~~~
./Include/object.h:299:69: note: expanded from macro 'Py_SET_SIZE'
# define Py_SET_SIZE(ob, size) Py_SET_SIZE(_PyVarObject_CAST(ob), (size))
 ~~~~~~~~~~~ ^~~~
Objects/bytearrayobject.c:243:21: warning: implicit conversion changes signedness: 'size_t' (aka 'unsigned long') to 'Py_ssize_t' (aka 'long') [-Wsign-conversion]
 obj->ob_alloc = alloc;
 ~ ^~~~~
Objects/bytearrayobject.c:412:24: warning: implicit conversion changes signedness: 'Py_ssize_t' (aka 'long') to 'size_t' (aka 'unsigned long') [-Wsign-conversion]
 for (cur = start, i = 0; i < slicelength;
 ~ ^~~~~
Objects/bytearrayobject.c:413:25: warning: implicit conversion changes signedness: 'Py_ssize_t' (aka 'long') to 'size_t' (aka 'unsigned long') [-Wsign-conversion]
 cur += step, i++){
 ~~ ^~~~
Objects/bytearrayobject.c:586:38: warning: implicit conversion loses integer precision: 'int' to 'char' [-Wimplicit-int-conversion]
 PyByteArray_AS_STRING(self)[i] = ival;
 ~ ^~~~
Objects/bytearrayobject.c:698:24: warning: implicit conversion changes signedness: 'Py_ssize_t' (aka 'long') to 'size_t' (aka 'unsigned long') [-Wsign-conversion]
 for (cur = start, i = 0;
 ~ ^~~~~
Objects/bytearrayobject.c:699:39: warning: implicit conversion changes signedness: 'Py_ssize_t' (aka 'long') to 'size_t' (aka 'unsigned long') [-Wsign-conversion]
 i < slicelen; cur += step, i++){
 ~~ ^~~~
Objects/bytearrayobject.c:702:27: warning: implicit conversion changes signedness: 'Py_ssize_t' (aka 'long') to 'size_t' (aka 'unsigned long') [-Wsign-conversion]
 if (cur + step >= (size_t)PyByteArray_GET_SIZE(self))
 ~ ^~~~
Objects/bytearrayobject.c:703:60: warning: implicit conversion changes signedness: 'size_t' (aka 'unsigned long') to 'Py_ssize_t' (aka 'long') [-Wsign-conversion]
 lim = PyByteArray_GET_SIZE(self) - cur - 1;
 ~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~
Objects/bytearrayobject.c:703:27: warning: implicit conversion changes signedness: 'Py_ssize_t' (aka 'long') to 'size_t' (aka 'unsigned long') [-Wsign-conversion]
 lim = PyByteArray_GET_SIZE(self) - cur - 1;
 ^~~~~~~~~~~~~~~~~~~~~~~~~~ ~
./Include/cpython/bytearrayobject.h:34:36: note: expanded from macro 'PyByteArray_GET_SIZE'
#define PyByteArray_GET_SIZE(self) PyByteArray_GET_SIZE(_PyObject_CAST(self))
 ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Objects/bytearrayobject.c:709:44: warning: implicit conversion changes signedness: 'Py_ssize_t' (aka 'long') to 'size_t' (aka 'unsigned long') [-Wsign-conversion]
 cur = start + (size_t)slicelen*step;
 ~^~~~
Objects/bytearrayobject.c:709:19: warning: implicit conversion changes signedness: 'Py_ssize_t' (aka 'long') to 'size_t' (aka 'unsigned long') [-Wsign-conversion]
 cur = start + (size_t)slicelen*step;
 ^~~~~ ~
Objects/bytearrayobject.c:713:25: warning: implicit conversion changes signedness: 'Py_ssize_t' (aka 'long') to 'size_t' (aka 'unsigned long') [-Wsign-conversion]
 PyByteArray_GET_SIZE(self) - cur);
 ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
./Include/cpython/bytearrayobject.h:34:36: note: expanded from macro 'PyByteArray_GET_SIZE'
#define PyByteArray_GET_SIZE(self) PyByteArray_GET_SIZE(_PyObject_CAST(self))
 ^
/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/secure/_string.h:70:34: note: expanded from macro 'memmove'
 __builtin___memmove_chk (dest, __VA_ARGS__, __darwin_obsz0 (dest))
 ^~~~~~~~~~~
Objects/bytearrayobject.c:733:24: warning: implicit conversion changes signedness: 'Py_ssize_t' (aka 'long') to 'size_t' (aka 'unsigned long') [-Wsign-conversion]
 for (cur = start, i = 0; i < slicelen; cur += step, i++)
 ~ ^~~~~
Objects/bytearrayobject.c:733:59: warning: implicit conversion changes signedness: 'Py_ssize_t' (aka 'long') to 'size_t' (aka 'unsigned long') [-Wsign-conversion]
 for (cur = start, i = 0; i < slicelen; cur += step, i++)
 ~~ ^~~~
Objects/bytearrayobject.c:867:20: warning: implicit conversion loses integer precision: 'int' to 'char' [-Wimplicit-int-conversion]
 s[i] = value;
 ~ ^~~~~
Objects/bytearrayobject.c:913:56: warning: implicit conversion loses integer precision: 'int' to 'char' [-Wimplicit-int-conversion]
 PyByteArray_AS_STRING(self)[Py_SIZE(self)-1] = value;
 ~ ^~~~~
Objects/bytearrayobject.c:946:15: warning: implicit conversion changes signedness: 'unsigned long' to 'Py_ssize_t' (aka 'long') [-Wsign-conversion]
 newsize = strlen(className);
 ~ ^~~~~~~~~~~~~~~~~
Objects/bytearrayobject.c:954:27: warning: implicit conversion changes signedness: 'Py_ssize_t' (aka 'long') to 'size_t' (aka 'unsigned long') [-Wsign-conversion]
 buffer = PyMem_Malloc(newsize);
 ~~~~~~~~~~~~ ^~~~~~~
Objects/bytearrayobject.c:977:12: warning: implicit conversion loses integer precision: 'int' to 'char' [-Wimplicit-int-conversion]
 *p++ = quote;
 ~ ^~~~~
Objects/bytearrayobject.c:1005:12: warning: implicit conversion loses integer precision: 'int' to 'char' [-Wimplicit-int-conversion]
 *p++ = quote;
 ~ ^~~~~
Objects/bytearrayobject.c:1067:40: warning: operand of ? changes signedness: 'Py_ssize_t' (aka 'long') to 'unsigned long' [-Wsign-conversion]
 Py_MIN(self_size, other_size));
 ^~~~~~~~~~
./Include/pymacro.h:27:38: note: expanded from macro 'Py_MIN'
#define Py_MIN(x, y) (((x) > (y)) ? (y) : (x))
 ^
Objects/bytearrayobject.c:1067:29: warning: operand of ? changes signedness: 'Py_ssize_t' (aka 'long') to 'unsigned long' [-Wsign-conversion]
 Py_MIN(self_size, other_size));
 ^~~~~~~~~
./Include/pymacro.h:27:44: note: expanded from macro 'Py_MIN'
#define Py_MIN(x, y) (((x) > (y)) ? (y) : (x))
 ^
In file included from Objects/bytearrayobject.c:1114:
Objects/stringlib/fastsearch.h:58:42: warning: implicit conversion changes signedness: 'Py_ssize_t' (aka 'long') to 'unsigned long' [-Wsign-conversion]
 p = STRINGLIB_FAST_MEMCHR(s, ch, n);
 ~~~~~~~~~~~~~~~~~~~~~ ^
Objects/stringlib/fastsearch.h:336:42: warning: implicit conversion changes signedness: 'Py_ssize_t' (aka 'long') to 'unsigned long' [-Wsign-conversion]
 p->cut * STRINGLIB_SIZEOF_CHAR));
 ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
Objects/stringlib/fastsearch.h:348:27: warning: implicit conversion changes signedness: 'const char' to 'unsigned int' [-Wsign-conversion]
 STRINGLIB_CHAR last = needle[len_needle - 1] & TABLE_MASK;
 ^~~~~~~~~~~~~~~~~~~~~~ ~
Objects/stringlib/fastsearch.h:350:28: warning: implicit conversion changes signedness: 'const char' to 'unsigned int' [-Wsign-conversion]
 STRINGLIB_CHAR x = needle[i] & TABLE_MASK;
 ^~~~~~~~~ ~
Objects/stringlib/fastsearch.h:365:18: warning: implicit conversion changes signedness: 'const char' to 'unsigned int' [-Wsign-conversion]
 p->table[needle[i] & TABLE_MASK] = shift;
 ^~~~~~~~~ ~
Objects/stringlib/fastsearch.h:395:43: warning: implicit conversion changes signedness: 'const char' to 'unsigned int' [-Wsign-conversion]
 Py_ssize_t shift = table[(*window_last) & TABLE_MASK];
 ^~~~~~~~~~~~ ~
Objects/stringlib/fastsearch.h:407:21: warning: implicit conversion changes signedness: 'const char' to 'unsigned int' [-Wsign-conversion]
 assert((window[len_needle - 1] & TABLE_MASK) ==
 ^~~~~~~~~~~~~~~~~~~~~~ ~
/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/assert.h:99:25: note: expanded from macro 'assert'
 (__builtin_expect(!(e), 0) ? __assert_rtn(__func__, __ASSERT_FILE_NAME, __LINE__, #e) : (void)0)
 ^
In file included from Objects/bytearrayobject.c:1114:
Objects/stringlib/fastsearch.h:408:21: warning: implicit conversion changes signedness: 'const char' to 'unsigned int' [-Wsign-conversion]
 (needle[len_needle - 1] & TABLE_MASK));
 ^~~~~~~~~~~~~~~~~~~~~~ ~
/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/assert.h:99:25: note: expanded from macro 'assert'
 (__builtin_expect(!(e), 0) ? __assert_rtn(__func__, __ASSERT_FILE_NAME, __LINE__, #e) : (void)0)
 ^
In file included from Objects/bytearrayobject.c:1114:
Objects/stringlib/fastsearch.h:434:47: warning: implicit conversion changes signedness: 'const char' to 'unsigned int' [-Wsign-conversion]
 Py_ssize_t shift = table[(*window_last) & TABLE_MASK];
 ^~~~~~~~~~~~ ~
Objects/stringlib/fastsearch.h:460:43: warning: implicit conversion changes signedness: 'const char' to 'unsigned int' [-Wsign-conversion]
 Py_ssize_t shift = table[(*window_last) & TABLE_MASK];
 ^~~~~~~~~~~~ ~
Objects/stringlib/fastsearch.h:471:21: warning: implicit conversion changes signedness: 'const char' to 'unsigned int' [-Wsign-conversion]
 assert((window[len_needle - 1] & TABLE_MASK) ==
 ^~~~~~~~~~~~~~~~~~~~~~ ~
/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/assert.h:99:25: note: expanded from macro 'assert'
 (__builtin_expect(!(e), 0) ? __assert_rtn(__func__, __ASSERT_FILE_NAME, __LINE__, #e) : (void)0)
 ^
In file included from Objects/bytearrayobject.c:1114:
Objects/stringlib/fastsearch.h:472:21: warning: implicit conversion changes signedness: 'const char' to 'unsigned int' [-Wsign-conversion]
 (needle[len_needle - 1] & TABLE_MASK));
 ^~~~~~~~~~~~~~~~~~~~~~ ~
/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/assert.h:99:25: note: expanded from macro 'assert'
 (__builtin_expect(!(e), 0) ? __assert_rtn(__func__, __ASSERT_FILE_NAME, __LINE__, #e) : (void)0)
 ^
In file included from Objects/bytearrayobject.c:1117:
Objects/stringlib/join.h:46:40: warning: implicit conversion changes signedness: 'Py_ssize_t' (aka 'long') to 'unsigned long' [-Wsign-conversion]
 buffers = PyMem_NEW(Py_buffer, seqlen);
 ~~~~~~~~~~~~~~~~~~~~~^~~~~~~
./Include/pymem.h:82:52: note: expanded from macro 'PyMem_NEW'
#define PyMem_NEW(type, n) PyMem_New(type, (n))
 ~~~~~~~~~~~~~~~~~^~~
./Include/pymem.h:65:34: note: expanded from macro 'PyMem_New'
 ( (type *) PyMem_Malloc((n) * sizeof(type)) ) )
 ^ ~
In file included from Objects/bytearrayobject.c:1121:
Objects/stringlib/transmogrify.h:264:41: warning: implicit conversion changes signedness: 'long' to 'unsigned long' [-Wsign-conversion]
 while ((start = findchar(start, end - start, c)) != NULL){
 ~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~
Objects/stringlib/transmogrify.h:253:46: note: expanded from macro 'findchar'
 ((char *)memchr((const void *)(target), c, target_len))
 ~~~~~~ ^~~~~~~~~~
Objects/stringlib/transmogrify.h:378:36: warning: implicit conversion changes signedness: 'long' to 'unsigned long' [-Wsign-conversion]
 next = findchar(start, end - start, from_c);
 ~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~
Objects/stringlib/transmogrify.h:253:46: note: expanded from macro 'findchar'
 ((char *)memchr((const void *)(target), c, target_len))
 ~~~~~~ ^~~~~~~~~~
Objects/stringlib/transmogrify.h:458:29: warning: implicit conversion changes signedness: 'Py_ssize_t' (aka 'long') to 'unsigned long' [-Wsign-conversion]
 next = findchar(self_s, self_len, from_c);
 ~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~
Objects/stringlib/transmogrify.h:253:46: note: expanded from macro 'findchar'
 ((char *)memchr((const void *)(target), c, target_len))
 ~~~~~~ ^~~~~~~~~~
Objects/stringlib/transmogrify.h:480:36: warning: implicit conversion changes signedness: 'long' to 'unsigned long' [-Wsign-conversion]
 next = findchar(start, end - start, from_c);
 ~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~
Objects/stringlib/transmogrify.h:253:46: note: expanded from macro 'findchar'
 ((char *)memchr((const void *)(target), c, target_len))
 ~~~~~~ ^~~~~~~~~~
Objects/stringlib/transmogrify.h:582:36: warning: implicit conversion changes signedness: 'long' to 'unsigned long' [-Wsign-conversion]
 next = findchar(start, end - start, from_c);
 ~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~
Objects/stringlib/transmogrify.h:253:46: note: expanded from macro 'findchar'
 ((char *)memchr((const void *)(target), c, target_len))
 ~~~~~~ ^~~~~~~~~~
Objects/bytearrayobject.c:1321:45: warning: implicit conversion changes signedness: 'Py_ssize_t' (aka 'long') to 'unsigned long' [-Wsign-conversion]
 && memcmp(self_start, prefix_start, prefix_len) == 0)
 ~~~~~~ ^~~~~~~~~~
Objects/bytearrayobject.c:1354:33: warning: implicit conversion changes signedness: 'Py_ssize_t' (aka 'long') to 'unsigned long' [-Wsign-conversion]
 suffix_start, suffix_len) == 0)
 ^~~~~~~~~~
Objects/bytearrayobject.c:1742:18: warning: implicit conversion loses integer precision: 'int' to 'char' [-Wimplicit-int-conversion]
 buf[index] = item;
 ~ ^~~~
Objects/bytearrayobject.c:1771:38: warning: implicit conversion loses integer precision: 'int' to 'char' [-Wimplicit-int-conversion]
 PyByteArray_AS_STRING(self)[n] = item;
 ~ ^~~~
Objects/bytearrayobject.c:1838:22: warning: implicit conversion loses integer precision: 'int' to 'char' [-Wimplicit-int-conversion]
 buf[len++] = value;
 ~ ^~~~~
Objects/bytearrayobject.c:1947:41: warning: implicit conversion loses integer precision: 'int' to 'char' [-Wimplicit-int-conversion]
 where = stringlib_find_char(buf, n, value);
 ~~~~~~~~~~~~~~~~~~~ ^~~~~
Objects/bytearrayobject.c:1989:78: warning: implicit conversion changes signedness: 'Py_ssize_t' (aka 'long') to 'unsigned long' [-Wsign-conversion]
 while (left < mysize && memchr(bytesptr, (unsigned char)myptr[left], byteslen))
 ~~~~~~ ^~~~~~~~
Objects/bytearrayobject.c:1996:81: warning: implicit conversion changes signedness: 'Py_ssize_t' (aka 'long') to 'unsigned long' [-Wsign-conversion]
 } while (right >= left && memchr(bytesptr, (unsigned char)myptr[right], byteslen));
 ~~~~~~ ^~~~~~~~
64 warnings generated.

these are just some from my output!

[ZeroIntensity]

What configure arguments were used? I compiled earlier today and saw only a few warnings, not hundreds.

[sobolevn]

--with-pydebug

[Eclips4]

What configure arguments were used? I compiled earlier today and saw only a few warnings, not hundreds.

Perhaps that's because Nikita is using clang

[ZeroIntensity]

Oh right, I forgot about the compiler. IIRC, mine was gcc.

[sobolevn]

No, I am using gcc :)
It is visible here:

gcc -c -fno-strict-overflow -Wsign-compare -g -Og -Wall -I/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include -I/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include -fstack-protector-strong -Wconversion -Wimplicit-fallthrough -Werror=format-security -Wall -std=c11 -Wextra -Wno-unused-parameter -Wno-missing-field-initializers -Wstrict-prototypes -Werror=implicit-function-declaration -fvisibility=hidden -I./Include/internal -I./Include/internal/mimalloc -I. -I./Include -I/opt/homebrew/opt/openssl/include -I/opt/homebrew/opt/openssl/include -DPy_BUILD_CORE -o Objects/bytearrayobject.o Objects/bytearrayobject.c

[nohlson]

New compiler options were added based on OpenSSF compiler hardening guidance. You can configure with the option --disable-safety to not include these compiler options in your build. We have been working to roll in the suggested compiler options: #112301