Fix -Werror=dangling-pointer errors reported linux-aarch64 gcc buil…

…d. (iree-org#19351)

Another tentative fix for iree-org#19264.
This was not fixed by iree-org#19265.

(Untested beyond what presubmit covers)

compiler/src/iree/compiler/Codegen/Common/ConcretizePadResultShape.cpp

@@ -137,11 +137,12 @@ class ConcretizePadResultShapePass final
     auto funcOp = getOperation();
 
     ConfigTrackingListener listener;
+    GreedyRewriteConfig config;
+    config.listener = &listener;
+
     {
       RewritePatternSet patterns(context);
       populateConcretizePadResultShapePatterns(patterns);
-      GreedyRewriteConfig config;
-      config.listener = &listener;
       if (failed(applyPatternsAndFoldGreedily(funcOp, std::move(patterns),
                                               config))) {
         return signalPassFailure();

compiler/src/iree/compiler/Codegen/Common/ConfigTrackingCanonicalizer.cpp

@@ -96,6 +96,7 @@ struct ConfigTrackingCanonicalizerPass final
       config.listener = &listener;
       LogicalResult didConverge =
           applyPatternsAndFoldGreedily(getOperation(), *patterns, config);
+      config.listener = nullptr;
       if (this->testConvergence && failed(didConverge)) {
         getOperation()->emitError("Canonicalizer failed to converge");
         return signalPassFailure();