commit 8f87eefe7f0576c05c488874eb9601a7a87c7312
author Serhiy Storchaka <storchaka@gmail.com> Sun Apr 12 14:58:27 2020 +0300
committer GitHub <noreply@github.com> Sun Apr 12 14:58:27 2020 +0300
tree 10ea36d1f702ae9e8bc34bcc88588868706948f6
parent 3e0dd3730b5eff7e9ae6fb921aa77cd26efc9e3a

bpo-39943: Add the const qualifier to pointers on non-mutable PyBytes data. (GH-19472)

Modules/_io/bytesio.c

diff --git a/Modules/_io/bytesio.c b/Modules/_io/bytesio.c
index b5d308a..f4261b3 100644
--- a/Modules/_io/bytesio.c
+++ b/Modules/_io/bytesio.c
@@ -393,7 +393,7 @@
 static PyObject *
 read_bytes(bytesio *self, Py_ssize_t size)
 {
-    char *output;
+    const char *output;
 
     assert(self->buf != NULL);
     assert(size <= self->string_size);
@@ -502,7 +502,7 @@
 {
     Py_ssize_t maxsize, size, n;
     PyObject *result, *line;
-    char *output;
+    const char *output;
 
     CHECK_CLOSED(self);
 

Modules/_io/textio.c

diff --git a/Modules/_io/textio.c b/Modules/_io/textio.c
index 12dba38..92d6faa 100644
--- a/Modules/_io/textio.c
+++ b/Modules/_io/textio.c
@@ -2640,7 +2640,7 @@
     Py_ssize_t chars_to_skip, chars_decoded;
     Py_ssize_t skip_bytes, skip_back;
     PyObject *saved_state = NULL;
-    char *input, *input_end;
+    const char *input, *input_end;
     Py_ssize_t dec_buffer_len;
     int dec_flags;