Merge branch 'js/use-bug-macro'

Developer support update, by using BUG() macro instead of die() to
mark codepaths that should not happen more clearly.

* js/use-bug-macro:
  BUG_exit_code: fix sparse "symbol not declared" warning
  Convert remaining die*(BUG) messages
  Replace all die("BUG: ...") calls by BUG() ones
  run-command: use BUG() to report bugs, not die()
  test-tool: help verifying BUG() code paths

builtin/fast-export.c

@@ -516,7 +516,7 @@ static void anonymize_ident_line(const char **beg, const char **end)
 	/* skip "committer", "author", "tagger", etc */
 	end_of_header = strchr(*beg, ' ');
 	if (!end_of_header)
-		die("BUG: malformed line fed to anonymize_ident_line: %.*s",
+		BUG("malformed line fed to anonymize_ident_line: %.*s",
 		    (int)(*end - *beg), *beg);
 	end_of_header++;
 	strbuf_add(out, *beg, end_of_header - *beg);