fix(parser): trailing semicolons triggering end of scope diagnostics

Fixes #265

Author: gnikit

CHANGELOG.md

@@ -42,6 +42,8 @@
 
 ### Fixed
 
+- Fixed end of scope errors raised by trailing semicolon in native parser
+  ([#265](https://github.com/fortran-lang/fortls/issues/265))
 - Fixed bug where parent scope for includes in AST could be `None`
   ([#329](https://github.com/fortran-lang/fortls/issues/329))
 - Fixed preprocessor bug with `if` and `elif` conditionals

fortls/parsers/internal/parser.py

@@ -1350,6 +1350,7 @@ def parse(
                 multi_lines.extendleft(line_stripped.split(";"))
                 line = multi_lines.pop()
                 line_stripped = line
+                line_no_comment = line
             # Test for scope end
             if file_ast.end_scope_regex is not None:
                 match = FRegex.END_WORD.match(line_no_comment)

test/test_parser.py

@@ -39,3 +39,12 @@ def test_private_visibility_interfaces():
     err_str, _ = file.load_from_disk()
     file.parse()
     assert err_str is None
+
+
+def test_end_scopes_semicolon():
+    file_path = test_dir / "parse" / "trailing_semicolon.f90"
+    file = FortranFile(str(file_path))
+    err_str, _ = file.load_from_disk()
+    ast = file.parse()
+    assert err_str is None
+    assert not ast.end_errors

test/test_source/parse/trailing_semicolon.f90

@@ -0,0 +1,6 @@
+program trailing_semicolon_in_end_scope
+  integer :: i
+  do i=1, 3
+      print *, "Hello World!"
+  end do;
+end program trailing_semicolon_in_end_scope