70488fc8f6
This change makes the error message consistent with a similar message in sdk/lib/_internal/vm/bin/vmservice_server.dart. Before: Could not start Observatory HTTP server After: Could not start Observatory HTTP server: Invalid argument(s): A directory corresponding to fileSystemPath "/.../out/DebugX64/devtools" could not be found #0 createStaticHandler (package:shelf_static/src/static_handler.dart:50:5) [...] Change-Id: Ie42d39d8c009b4ea403e1584a524567b3da20a45 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/220742 Reviewed-by: Ben Konyi <bkonyi@google.com> Commit-Queue: Clement Skau <cskau@google.com>