From ca803a0dd7799167c8d04451547a9c03db1ce23c Mon Sep 17 00:00:00 2001
From: "Michael W. Hudson" <mwh@python.net>
Date: Thu, 3 Oct 2002 09:53:11 +0000
Subject: One last tweak to the tracing machinery: this actually computes what
 I intended all along.  Before instr_lb tended to be too high.

I don't think this actually makes any difference, given what the compiler
produces, but it makes me a bit happier.
---
 Python/ceval.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/Python/ceval.c b/Python/ceval.c
index 4930433..afc480e 100644
--- a/Python/ceval.c
+++ b/Python/ceval.c
@@ -2966,15 +2966,17 @@ maybe_call_line_trace(int opcode, Py_tracefunc func, PyObject *obj,
 			if (addr + *p > frame->f_lasti)
 				break;
 			addr += *p++;
+			if (*p) *instr_lb = addr;
 			line += *p++;
 			--size;
 		}
+
 		if (addr == frame->f_lasti) {
 			frame->f_lineno = line;
 			call_trace(func, obj, frame, 
 				   PyTrace_LINE, Py_None);
 		}
-		*instr_lb = addr;
+
 		if (size > 0) {
 			while (--size >= 0) {
 				addr += *p++;
-- 
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