pythongh-123229: Fix valgrind warning by initializing the f-string bu…

…ffers to 0 in the tokenizer (python#123263) Signed-off-by: Pablo Galindo <[email protected]>
miss-islington · Aug 23, 2024 · adc5190 · adc5190
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diff --git a/Misc/NEWS.d/next/Core and Builtins/2024-08-23-13-08-27.gh-issue-123229.aHm-dw.rst b/Misc/NEWS.d/next/Core and Builtins/2024-08-23-13-08-27.gh-issue-123229.aHm-dw.rst
@@ -0,0 +1,2 @@
+Fix valgrind warning by initializing the f-string buffers to 0 in the
+tokenizer. Patch by Pablo Galindo
diff --git a/Parser/lexer/state.c b/Parser/lexer/state.c
@@ -12,7 +12,8 @@
 struct tok_state *
 _PyTokenizer_tok_new(void)
 {
-    struct tok_state *tok = (struct tok_state *)PyMem_Malloc(
+    struct tok_state *tok = (struct tok_state *)PyMem_Calloc(
+                                            1,
                                             sizeof(struct tok_state));
     if (tok == NULL)
         return NULL;
Original file line number	Diff line number	Diff line change
		@@ -0,0 +1,2 @@
		Fix valgrind warning by initializing the f-string buffers to 0 in the
		tokenizer. Patch by Pablo Galindo