Arduino-CI
diff --git a/‎CHANGELOG.md
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+2 b/‎CHANGELOG.md
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+2
diff --git a/‎exe/arduino_ci.rb
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+3-1 b/‎exe/arduino_ci.rb
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+3-1
@@ -25,6 +25,8 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 - `arduino_ci.rb --help` no longer crashes
 
 - Fix missing `LED_BUILTIN` definition for Arduino Due, Zero and Circuit Playground.
+- No longer ignore failures if the first step of compiling files for the
+  unit test fails.
 
 ### Security
 
 
@@ -442,7 +442,9 @@ def perform_unit_tests(cpp_library, file_config)
     puts
     compilers.each do |gcc_binary|
       # before compiling the tests, build a shared library of everything except the test code
-      next unless build_shared_library(gcc_binary, p, config, cpp_library)
+      build_result = build_shared_library(gcc_binary, p, config, cpp_library)
+      @failure_count += 1 unless build_result
+      next unless build_result
 
       # now build and run each test using the shared library build above
       config.allowable_unittest_files(cpp_library.test_files).each do |unittest_path|