[HWASan symbolize] Write error to stderr.

diff --git a/compiler-rt/lib/hwasan/scripts/hwasan_symbolize b/compiler-rt/lib/hwasan/scripts/hwasan_symbolize
index c122387..66a9c92 100755 (executable)
--- a/compiler-rt/lib/hwasan/scripts/hwasan_symbolize
+++ b/compiler-rt/lib/hwasan/scripts/hwasan_symbolize
@@ -268,7 +268,7 @@ class Symbolizer:
           except FileNotFoundError:
             continue
           except Exception as e:
-            print("Failed to parse {}: {}".format(filename, e))
+            print("Failed to parse {}: {}".format(filename, e), file=sys.stderr)
             continue
           if bid is not None:
             self.__index[bid] = filename