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GeezerVison is showing github.com — bpo-34400: Fix more undefined behavior in parsetok.c (GH-8833) · python/cpython@985dcd4

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- parsetok.c

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`‎Parser/parsetok.c‎`

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+4-2Lines changed: 4 additions & 2 deletions

Original file line number	Diff line number	Diff line change
`@@ -252,11 +252,13 @@ parsetok(struct tok_state tok, grammar g, int start, perrdetail *err_ret,`
`252`	`252`	`}`
`253`	`253`	`}`
`254`	`254`	`#endif`
`255`		`- if (a >= tok->line_start)`
	`255`	`+ if (a != NULL && a >= tok->line_start) {`
`256`	`256`	`col_offset = Py_SAFE_DOWNCAST(a - tok->line_start,`
`257`	`257`	`intptr_t, int);`
`258`		`- else`
	`258`	`+ }`
	`259`	`+ else {`
`259`	`260`	`col_offset = -1;`
	`261`	`+ }`
`260`	`262`
`261`	`263`	`if ((err_ret->error =`
`262`	`264`	`PyParser_AddToken(ps, (int)type, str,`

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