diff --git a/mlir/lib/Transforms/Inliner.cpp b/mlir/lib/Transforms/Inliner.cpp
--- a/mlir/lib/Transforms/Inliner.cpp
+++ b/mlir/lib/Transforms/Inliner.cpp
@@ -434,8 +434,11 @@
     LogicalResult inlineResult = inlineCall(
         inliner, call, cast<CallableOpInterface>(targetRegion->getParentOp()),
         targetRegion, /*shouldCloneInlinedRegion=*/!inlineInPlace);
-    if (failed(inlineResult))
+    if (failed(inlineResult)) {
+      LLVM_DEBUG(llvm::dbgs() << "** Failed to inline :");
+      call.dump();
       continue;
+    }
     inlinedAnyCalls = true;
 
     // If the inlining was successful, Merge the new uses into the source node.