commit bcd39b7b9bd3a7f8a6a34410169794a6264a6fed

Author: Victor Stinner <vstinner@redhat.com>

Date:   Wed Nov 7 00:45:13 2018 +0100

    bpo-25083: Python can sometimes create incorrect .pyc files

    Python 2 never checked for I/O error when reading .py files and

    thus could mistake an I/O error for EOF and create incorrect .pyc

    files. This adds an check for this and aborts on an error.

    Patch by tzickel, commit f64c813de84011a84ca21d75a294861a9cc2dfdc.

    Resolves: rhbz#1629982

diff --git a/Include/errcode.h b/Include/errcode.h

index becec80..5c5a0f7 100644

--- a/Include/errcode.h

+++ b/Include/errcode.h

@@ -29,6 +29,7 @@ extern "C" {

 #define E_EOFS		23	/* EOF in triple-quoted string */

 #define E_EOLS		24	/* EOL in single-quoted string */

 #define E_LINECONT	25	/* Unexpected characters after a line continuation */

+#define E_IO    	26	/* I/O error */

 #ifdef __cplusplus

 }

diff --git a/Parser/tokenizer.c b/Parser/tokenizer.c

index ee6313b..0217f2b 100644

--- a/Parser/tokenizer.c

+++ b/Parser/tokenizer.c

@@ -1644,6 +1644,11 @@ int

 PyTokenizer_Get(struct tok_state *tok, char **p_start, char **p_end)

 {

     int result = tok_get(tok, p_start, p_end);

+    if (tok->fp && ferror(tok->fp)) {

+        clearerr(tok->fp);

+        result = ERRORTOKEN;

+        tok->done = E_IO;

+    }

     if (tok->decoding_erred) {

         result = ERRORTOKEN;

         tok->done = E_DECODE;

diff --git a/Python/pythonrun.c b/Python/pythonrun.c

index 0b73f3a..9f06236 100644

--- a/Python/pythonrun.c

+++ b/Python/pythonrun.c

@@ -1643,6 +1643,9 @@ err_input(perrdetail *err)

         Py_XDECREF(tb);

         break;

     }

+    case E_IO:

+        msg = "I/O error while reading";

+        break;

     case E_LINECONT:

         msg = "unexpected character after line continuation character";

         break;