Fix CompilationConfig repr (#19091)

Signed-off-by: rzou <zou3519@gmail.com>

tests/test_config.py

@@ -6,6 +6,7 @@ from typing import Literal, Union
 
 import pytest
 
+from vllm.compilation.backends import VllmBackend
 from vllm.config import (LoadConfig, ModelConfig, PoolerConfig, VllmConfig,
                          config, get_field)
 from vllm.model_executor.layers.pooler import PoolingType
@@ -44,6 +45,18 @@ def test_config(test_config, expected_error):
         config(test_config)
 
 
+def test_compile_config_repr_succeeds():
+    # setup: VllmBackend mutates the config object
+    config = VllmConfig()
+    backend = VllmBackend(config)
+    backend.configure_post_pass()
+
+    # test that repr(config) succeeds
+    val = repr(config)
+    assert 'VllmConfig' in val
+    assert 'inductor_passes' in val
+
+
 def test_get_field():
 
     @dataclass

vllm/config.py

@@ -4007,19 +4007,24 @@ class CompilationConfig:
 
     def __repr__(self) -> str:
         exclude = {
-            "static_forward_context",
-            "enabled_custom_ops",
-            "disabled_custom_ops",
-            "compilation_time",
-            "bs_to_padded_graph_size",
-            "pass_config",
-            "traced_files",
+            "static_forward_context": True,
+            "enabled_custom_ops": True,
+            "disabled_custom_ops": True,
+            "compilation_time": True,
+            "bs_to_padded_graph_size": True,
+            "pass_config": True,
+            "traced_files": True,
+            "inductor_compile_config": {
+                "post_grad_custom_post_pass": True,
+            },
         }
         # The cast to string is necessary because Pydantic is mocked in docs
         # builds and sphinx-argparse doesn't know the return type of decode()
         return str(
             TypeAdapter(CompilationConfig).dump_json(
-                self, exclude=exclude, exclude_unset=True).decode())
+                self,
+                exclude=exclude,  # type: ignore[arg-type]
+                exclude_unset=True).decode())
 
     __str__ = __repr__