fix: output streaming in case of fallback (#1071)

Signed-off-by: Louis Mandel <[email protected]>

Author: mandel

src/pdl/pdl_interpreter.py

@@ -453,6 +453,12 @@ def process_advanced_block(
                 if block.trace_error_on_retry:
                     scope = set_error_to_scope_for_retry(scope, error, block.pdl__id)
                 continue
+            state = init_state.with_yield_result(
+                init_state.yield_result and ContributeTarget.RESULT in block.contribute
+            )
+            state = state.with_yield_background(
+                state.yield_background and context_in_contribute(block)
+            )
             (
                 result,
                 background,

tests/test_fallback.py

@@ -76,3 +76,15 @@ def test_type_checking_in_fallback():
         str(exc.value.message)
         == "Type errors during spec checking:\nline 4 - Error should be of type <class 'int'>"
     )
+
+
+def test_fallback_and_parser():
+    prog_str = """
+model: "raise an error"
+parser: json
+spec: { xxx: string, age: integer}
+fallback:
+    data: { "xxx": "rosa", "age": 3 }
+"""
+    result = exec_str(prog_str)
+    assert result == {"xxx": "rosa", "age": 3}