#4547: When debugging a very large function, it was not always
possible to update the lineno attribute of the current frame.
diff --git a/Objects/frameobject.c b/Objects/frameobject.c
index ad31fc5..4cbb35d 100644
--- a/Objects/frameobject.c
+++ b/Objects/frameobject.c
@@ -98,7 +98,7 @@
int new_iblock = 0; /* The new value of f_iblock */
unsigned char *code = NULL; /* The bytecode for the frame... */
Py_ssize_t code_len = 0; /* ...and its length */
- char *lnotab = NULL; /* Iterating over co_lnotab */
+ unsigned char *lnotab = NULL; /* Iterating over co_lnotab */
Py_ssize_t lnotab_len = 0; /* (ditto) */
int offset = 0; /* (ditto) */
int line = 0; /* (ditto) */
@@ -148,7 +148,7 @@
/* Find the bytecode offset for the start of the given
* line, or the first code-owning line after it. */
PyString_AsStringAndSize(f->f_code->co_lnotab,
- &lnotab, &lnotab_len);
+ &(char*)lnotab, &lnotab_len);
addr = 0;
line = f->f_code->co_firstlineno;
new_lasti = -1;