[PRISM] Raise syntax errors when found

common.mk

@@ -8495,6 +8495,7 @@ iseq.$(OBJEXT): $(top_srcdir)/internal/fixnum.h
 iseq.$(OBJEXT): $(top_srcdir)/internal/gc.h
 iseq.$(OBJEXT): $(top_srcdir)/internal/hash.h
 iseq.$(OBJEXT): $(top_srcdir)/internal/imemo.h
+iseq.$(OBJEXT): $(top_srcdir)/internal/io.h
 iseq.$(OBJEXT): $(top_srcdir)/internal/numeric.h
 iseq.$(OBJEXT): $(top_srcdir)/internal/parse.h
 iseq.$(OBJEXT): $(top_srcdir)/internal/rational.h
@@ -8702,6 +8703,7 @@ iseq.$(OBJEXT): {$(VPATH)}internal/value_type.h
 iseq.$(OBJEXT): {$(VPATH)}internal/variable.h
 iseq.$(OBJEXT): {$(VPATH)}internal/warning_push.h
 iseq.$(OBJEXT): {$(VPATH)}internal/xmalloc.h
+iseq.$(OBJEXT): {$(VPATH)}io.h
 iseq.$(OBJEXT): {$(VPATH)}iseq.c
 iseq.$(OBJEXT): {$(VPATH)}iseq.h
 iseq.$(OBJEXT): {$(VPATH)}method.h

iseq.c

@@ -28,6 +28,7 @@
 #include "internal/file.h"
 #include "internal/gc.h"
 #include "internal/hash.h"
+#include "internal/io.h"
 #include "internal/ruby_parser.h"
 #include "internal/sanitizers.h"
 #include "internal/symbol.h"
@@ -1404,6 +1405,22 @@ static void
 iseqw_s_compile_prism_compile(pm_parser_t *parser, VALUE opt, rb_iseq_t *iseq, VALUE file, VALUE path, int first_lineno)
 {
     pm_node_t *node = pm_parse(parser);
+
+    if (parser->error_list.size > 0) {
+        pm_buffer_t buffer = { 0 };
+        pm_parser_errors_format(parser, &buffer, rb_stderr_tty_p());
+
+        pm_buffer_prepend_string(&buffer, "syntax errors found\n", 20);
+        VALUE error = rb_exc_new(rb_eSyntaxError, pm_buffer_value(&buffer), pm_buffer_length(&buffer));
+
+        pm_buffer_free(&buffer);
+        pm_node_destroy(parser, node);
+
+        // TODO: We need to set the backtrace based on the ISEQ.
+        // VALUE path = pathobj_path(ISEQ_BODY(iseq)->location.pathobj);
+        // rb_funcallv(error, rb_intern("set_backtrace"), 1, &path);
+        rb_exc_raise(error);
+    } else {
         rb_code_location_t code_location;
         pm_code_location(&code_location, &parser->newline_list, &node->location);
 
@@ -1417,6 +1434,7 @@ iseqw_s_compile_prism_compile(pm_parser_t *parser, VALUE opt, rb_iseq_t *iseq, V
 
         finish_iseq_build(iseq);
         pm_node_destroy(parser, node);
+    }
 }
 
 static VALUE

test/ruby/test_iseq.rb

@@ -801,12 +801,15 @@ class TestISeq < Test::Unit::TestCase
 
   def test_compile_prism_with_file
     Tempfile.create(%w"test_iseq .rb") do |f|
-      f.puts "name = 'Prism'; puts 'hello"
+      f.puts "name = 'Prism'; puts 'hello'"
       f.close
 
-      assert_nothing_raised(SyntaxError) {
+      assert_nothing_raised(TypeError) do
+        begin
           RubyVM::InstructionSequence.compile_prism(f.path)
-      }
+        rescue SyntaxError
+        end
+      end
     end
   end
 end