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bpo-2180: Treat line continuation at EOF as a SyntaxError (GH-13401)

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This makes the parser consistent with the tokenize module (already the case
in `pypy`).

sample
------

```python
x = 5\
```

before
------

```console
$ python3 t.py
$ python3 -mtokenize t.py
t.py:2:0: error: EOF in multi-line statement
```

after
-----

```console
$ ./python t.py
  File "t.py", line 3
    x = 5\

         ^
SyntaxError: unexpected EOF while parsing
$ ./python -m tokenize t.py
t.py:2:0: error: EOF in multi-line statement
```



https://bugs.python.org/issue2180
This commit is contained in:
Anthony Sottile 2019-05-18 11:27:17 -07:00 • committed by Miss Islington (bot)
parent e917f2ed9a
commit abea73bf4a
3 changed files with 36 additions and 2 deletions
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11
Parser/tokenizer.c
View file

@ -983,7 +983,8 @@ tok_nextc(struct tok_state *tok)
return EOF;
/* Last line does not end in \n,
fake one */
strcpy(tok->inp, "\n");
if (tok->inp[-1] != '\n')
strcpy(tok->inp, "\n");
}
tok->inp = strchr(tok->inp, '\0');
done = tok->inp[-1] == '\n';
@ -1674,6 +1675,14 @@ tok_get(struct tok_state *tok, char **p_start, char **p_end)
tok->cur = tok->inp;
return ERRORTOKEN;
}
c = tok_nextc(tok);
if (c == EOF) {
tok->done = E_EOF;
tok->cur = tok->inp;
return ERRORTOKEN;
} else {
tok_backup(tok, c);
}
tok->cont_line = 1;
goto again; /* Read next line */
}