1 files changed, 67 insertions, 0 deletions
diff --git a/test/prism/fuzzer_test.rb b/test/prism/fuzzer_test.rb
new file mode 100644
index 0000000000..511210e7ee
--- /dev/null
+++ b/test/prism/fuzzer_test.rb
@@ -0,0 +1,67 @@
+# frozen_string_literal: true
+
+return if ENV["PRISM_BUILD_MINIMAL"]
+
+require_relative "test_helper"
+
+module Prism
+  # These tests are simply to exercise snippets found by the fuzzer that caused
+  # invalid memory access.
+  class FuzzerTest < TestCase
+    def self.snippet(name, source)
+      define_method(:"test_fuzzer_#{name}") { Prism.dump(source) }
+    end
+
+    snippet "incomplete global variable", "$"
+    snippet "incomplete symbol", ":"
+    snippet "incomplete escaped string", '"\\'
+    snippet "trailing comment", "1\n#\n"
+    snippet "comment followed by whitespace at end of file", "1\n#\n "
+    snippet "trailing asterisk", "a *"
+    snippet "incomplete decimal number", "0d"
+    snippet "incomplete binary number", "0b"
+    snippet "incomplete octal number", "0o"
+    snippet "incomplete hex number", "0x"
+    snippet "incomplete escaped list", "%w[\\"
+    snippet "incomplete escaped regex", "/a\\"
+    snippet "unterminated heredoc with unterminated escape at end of file", "<<A\n\\"
+    snippet "escaped octal at end of file 1", '"\\3'
+    snippet "escaped octal at end of file 2", '"\\33'
+    snippet "escaped hex at end of file 1", '"\\x'
+    snippet "escaped hex at end of file 2", '"\\x3'
+    snippet "escaped unicode at end of file 1", '"\\u{3'
+    snippet "escaped unicode at end of file 2", '"\\u{33'
+    snippet "escaped unicode at end of file 3", '"\\u{333'
+    snippet "escaped unicode at end of file 4", '"\\u{3333'
+    snippet "escaped unicode at end of file 5", '"\\u{33333'
+    snippet "escaped unicode at end of file 6", '"\\u{333333'
+    snippet "escaped unicode at end of file 7", '"\\u3'
+    snippet "escaped unicode at end of file 8", '"\\u33'
+    snippet "escaped unicode at end of file 9", '"\\u333'
+    snippet "float suffix at end of file", "1e"
+
+    snippet "statements node with multiple heredocs", <<~EOF
+      for <<A + <<B
+      A
+      B
+    EOF
+    snippet "create a binary call node with arg before receiver", <<~EOF
+      <<-A.g/{/
+      A
+      /, ""\\
+    EOF
+    snippet "regular expression with start and end out of order", <<~RUBY
+      <<-A.g//,
+      A
+      /{/, ''\\
+    RUBY
+    snippet "interpolated regular expression with start and end out of order", <<~RUBY
+      <<-A.g/{/,
+      A
+      a
+      /{/, ''\\
+    RUBY
+
+    snippet "parameter name that is zero length", "a { |b;"
+  end
+end