Print certain diagnostic to stderr incl. line number

Signed-off-by: Jan Pokorný <jpokorny@redhat.com>

1 files changed, 9 insertions, 3 deletions

diff --git a/gdb-bt-reformat b/gdb-bt-reformat
index 28461f5..2935ada 100755
--- a/gdb-bt-reformat
+++ b/gdb-bt-reformat
@@ -54,7 +54,7 @@ class BtLine(object):
         self._found = RE_BT.search(self._line)
         if self._found:
             for k, v in self._found.groupdict().iteritems():
-                #print "\t{0}: {1}".format(k, v)
+                #print >>stderr, "\t{0}: {1}".format(k, v)
                 setattr(self, k, v if v is not None else '')
         else:
             raise BtLineError(fill(line.strip(), initial_indent=self._space * 2,
@@ -75,14 +75,20 @@ class BtLine(object):
 def main(**kwargs):
     line = '__dummy__'
     firstline = True
-    while line:
+    cnt = 1
+    while line != '':
+        cnt += 1
         line = stdin.readline()
+        if not line.strip():
+            # unfortunately, textwrap.fill would alias, e.g., '\n' and '' cases
+            print line
+            continue
         try:
             btline = BtLine(line, **kwargs)
             print ('' if firstline else '\n') + str(btline)
         except BtLineError as ble:
             line = str(ble)
-            #print >>stderr, "bad line:", line
+            print >>stderr, ">> bad line:%i" % cnt
             print line
         finally:
             firstline = False