Exceptions with nil message shouldn't cause issues

sentry-ruby/CHANGELOG.md

@@ -27,6 +27,8 @@ config.max_breadcrumbs = 10
 - Ignore sentry-trace when tracing is not enabled [#1308](https://github.com/getsentry/sentry-ruby/pull/1308)
   - Fixes [#1307](https://github.com/getsentry/sentry-ruby/issues/1307)
 - Return nil from logger methods instead of breadcrumb buffer [#1299](https://github.com/getsentry/sentry-ruby/pull/1299)
+- Exceptions with nil message shouldn't cause issues [#1327](https://github.com/getsentry/sentry-ruby/pull/1327)
+  - Fixes [#1323](https://github.com/getsentry/sentry-ruby/issues/1323)
 
 ## 4.2.2
 

sentry-ruby/lib/sentry/interfaces/single_exception.rb

@@ -4,7 +4,7 @@ class SingleExceptionInterface < Interface
 
     def initialize(exception:, stacktrace: nil)
       @type = exception.class.to_s
-      @value = exception.message.byteslice(0..Event::MAX_MESSAGE_SIZE_IN_BYTES)
+      @value = (exception.message || "").byteslice(0..Event::MAX_MESSAGE_SIZE_IN_BYTES)
       @module = exception.class.to_s.split('::')[0...-1].join('::')
       @thread_id = Thread.current.object_id
       @stacktrace = stacktrace

sentry-ruby/spec/sentry/hub_spec.rb

@@ -157,6 +157,15 @@
       end.to raise_error(ArgumentError, 'expect the argument to be a Exception, got String ("String")')
     end
 
+    # see https://github.com/getsentry/sentry-ruby/issues/1323
+    it "don't causes error when the exception's message is nil" do
+      allow(exception).to receive(:message)
+
+      expect do
+        subject.capture_exception(exception)
+      end.to change { transport.events.count }.by(1)
+    end
+
     it_behaves_like "capture_helper" do
       let(:capture_helper) { :capture_exception }
       let(:capture_subject) { exception }