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gh-97556: Raise null bytes syntax error upon null in multiline string #104136

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Merged
merged 2 commits into from
May 4, 2023
Merged

gh-97556: Raise null bytes syntax error upon null in multiline string #104136

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gh-97556: Raise null bytes syntax error upon null in multiline string
lysnikolaou May 3, 2023
78fbd3c
Handle f-strings correctly as well
lysnikolaou May 3, 2023
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13 changes: 13 additions & 0 deletions Lib/test/test_cmd_line_script.py
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Original file line number Diff line number Diff line change
Expand Up @@ -669,6 +669,19 @@ def test_syntaxerror_null_bytes(self):
],
)

def test_syntaxerror_null_bytes_in_multiline_string(self):
scripts = ["\n'''\nmultilinestring\0\n'''", "\nf'''\nmultilinestring\0\n'''"] # Both normal and f-strings
with os_helper.temp_dir() as script_dir:
for script in scripts:
script_name = _make_test_script(script_dir, 'script', script)
_, _, stderr = assert_python_failure(script_name)
self.assertEqual(
stderr.splitlines()[-2:],
[ b" multilinestring",
b'SyntaxError: source code cannot contain null bytes'
]
)

def test_consistent_sys_path_for_direct_execution(self):
# This test case ensures that the following all give the same
# sys.path configuration:
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9 changes: 8 additions & 1 deletion Parser/tokenizer.c
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Expand Up @@ -2301,8 +2301,12 @@ tok_get_normal_mode(struct tok_state *tok, tokenizer_mode* current_tok, struct t
/* Get rest of string */
while (end_quote_size != quote_size) {
c = tok_nextc(tok);
if (tok->done == E_DECODE)
if (tok->done == E_ERROR) {
return MAKE_TOKEN(ERRORTOKEN);
}
if (tok->done == E_DECODE) {
break;
}
if (c == EOF || (quote_size == 1 && c == '\n')) {
assert(tok->multi_line_start != NULL);
// shift the tok_state's location into
Expand Down Expand Up @@ -2554,6 +2558,9 @@ tok_get_fstring_mode(struct tok_state *tok, tokenizer_mode* current_tok, struct

while (end_quote_size != current_tok->f_string_quote_size) {
int c = tok_nextc(tok);
if (tok->done == E_ERROR) {
return MAKE_TOKEN(ERRORTOKEN);
}
if (c == EOF || (current_tok->f_string_quote_size == 1 && c == '\n')) {
if (tok->decoding_erred) {
return MAKE_TOKEN(ERRORTOKEN);
Expand Down