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

remote.c

@@ -1819,7 +1819,7 @@ static const char *branch_get_push_1(struct branch *branch, struct strbuf *err)
 		}
 	}
 
-	die("BUG: unhandled push situation");
+	BUG("unhandled push situation");
 }
 
 const char *branch_get_push(struct branch *branch, struct strbuf *err)