[BugFix,Test] recompiles with string failure (#3338)

Author: vmoens

test/compile/test_compile_utils.py

@@ -24,9 +24,19 @@
 
 # Check that 'capture_log_records' captures records emitted when torch
 # recompiles a function.
+#
+# NOTE: Starting from PyTorch 2.11.x nightlies (around 2026-01-14), PyTorch
+# optimized guard generation for graph-breaking functions to only guard on
+# type rather than value. This means the test function no longer triggers
+# recompilation when called with different string values, since the type
+# remains the same. This is an improvement in PyTorch, not a bug.
 @pytest.mark.skipif(
     TORCH_VERSION < version.parse("2.5.0"), reason="requires Torch >= 2.5.0"
 )
+@pytest.mark.skipif(
+    TORCH_VERSION >= version.parse("2.11.0"),
+    reason="PyTorch >= 2.11.0 optimizes guards for graph-breaking functions",
+)
 @pytest.mark.skipif(
     sys.version_info >= (3, 14),
     reason="torch.compile is not supported on Python 3.14+",
@@ -35,7 +45,7 @@ def test_capture_log_records_recompile():
     torch.compiler.reset()
 
     # This function recompiles each time it is called with a different string
-    # input.
+    # input (on PyTorch < 2.11.0). The guard is on the exact value of `s`.
     @torch.compile
     def str_to_tensor(s):
         return bytes(s, "utf8")