changeset:   102737:1bf307f42a6b
user:        Ned Deily <nad@python.org>
date:        Wed Aug 17 17:18:33 2016 -0400
files:       Misc/NEWS Python/compile.c
description:
Issue #27594: Prevent assertion error when running test_ast with coverage
enabled: ensure code object has a valid first line number.
Patch suggested by Ivan Levkivskyi.


diff -r be9dc240bf28 -r 1bf307f42a6b Misc/NEWS
--- a/Misc/NEWS	Wed Aug 17 19:48:33 2016 +0200
+++ b/Misc/NEWS	Wed Aug 17 17:18:33 2016 -0400
@@ -167,6 +167,10 @@
 - Issue #27369: In test_pyexpat, avoid testing an error message detail that
   changed in Expat 2.2.0.
 
+- Issue #27594: Prevent assertion error when running test_ast with coverage
+  enabled: ensure code object has a valid first line number.
+  Patch suggested by Ivan Levkivskyi.
+
 Windows
 -------
 
diff -r be9dc240bf28 -r 1bf307f42a6b Python/compile.c
--- a/Python/compile.c	Wed Aug 17 19:48:33 2016 +0200
+++ b/Python/compile.c	Wed Aug 17 17:18:33 2016 -0400
@@ -4963,7 +4963,7 @@
 
     /* Set firstlineno if it wasn't explicitly set. */
     if (!c->u->u_firstlineno) {
-        if (entryblock && entryblock->b_instr)
+        if (entryblock && entryblock->b_instr && entryblock->b_instr->i_lineno)
             c->u->u_firstlineno = entryblock->b_instr->i_lineno;
         else
             c->u->u_firstlineno = 1;