CLI: Handle plot fails-to-start situations more gracefully.

diff --git a/cli/climain.cpp b/cli/climain.cpp
index c11fd94..6dec66d 100644 (file)
--- a/cli/climain.cpp
+++ b/cli/climain.cpp
@@ -275,7 +275,13 @@ int main (int argc, char**argv)
        sink.set_plot(&plot);
        plot.set_prefs(prefs);
 
-       plot.start();
+       try {
+               plot.start();
+       } catch (BrotException e) {
+               // Usually means the pixels are too small for all known types.
+               std::cerr << "Plot failed to start: " << e.msg << std::endl;
+               return 4;
+       }
        plot.wait();
        if (!quiet)
                std::cerr << std::endl << "Complete!" << std::endl;