[llvm-branch-commits] [clang] release/20.x: [clang-repl] Fix error recovery while PTU cleanup (#127467) (PR #142445)

[via llvm-branch-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-clang

Author: None (llvmbot)

<details>
<summary>Changes</summary>

Backport 3b4c51bb3243a02526313c51207a674139b67a00

Requested by: @<!-- -->anutosh491

---
Full diff: https://github.com/llvm/llvm-project/pull/142445.diff


2 Files Affected:

- (modified) clang/lib/Interpreter/IncrementalParser.cpp (+1-1) 
- (modified) clang/test/Interpreter/lambda.cpp (+13-2) 


``````````diff
diff --git a/clang/lib/Interpreter/IncrementalParser.cpp b/clang/lib/Interpreter/IncrementalParser.cpp
index e43cea1baf43a..1d223e230669c 100644
--- a/clang/lib/Interpreter/IncrementalParser.cpp
+++ b/clang/lib/Interpreter/IncrementalParser.cpp
@@ -175,7 +175,7 @@ void IncrementalParser::CleanUpPTU(TranslationUnitDecl *MostRecentTU) {
   // FIXME: We should de-allocate MostRecentTU
   for (Decl *D : MostRecentTU->decls()) {
     auto *ND = dyn_cast<NamedDecl>(D);
-    if (!ND)
+    if (!ND || ND->getDeclName().isEmpty())
       continue;
     // Check if we need to clean up the IdResolver chain.
     if (ND->getDeclName().getFETokenInfo() && !D->getLangOpts().ObjC &&
diff --git a/clang/test/Interpreter/lambda.cpp b/clang/test/Interpreter/lambda.cpp
index df75274a050b2..7e5e1057e4c9e 100644
--- a/clang/test/Interpreter/lambda.cpp
+++ b/clang/test/Interpreter/lambda.cpp
@@ -1,7 +1,8 @@
 // REQUIRES: host-supports-jit
 // UNSUPPORTED: system-aix
 // RUN: cat %s | clang-repl | FileCheck %s
-// RUN: cat %s | clang-repl -Xcc -O2 | FileCheck %s
+// RUN: cat %s | clang-repl -Xcc -Xclang -Xcc -verify -Xcc -O2 | FileCheck %s
+
 extern "C" int printf(const char *, ...);
 
 auto l1 = []() { printf("ONE\n"); return 42; };
@@ -14,4 +15,14 @@ auto r2 = l2();
 auto r3 = l2();
 // CHECK: TWO
 
-%quit
+// Verify non-local lambda capture error is correctly reported
+int x = 42;
+
+// expected-error {{non-local lambda expression cannot have a capture-default}}
+auto capture = [&]() { return x * 2; };
+
+// Ensure interpreter continues and x is still valid
+printf("x = %d\n", x);
+// CHECK: x = 42
+
+%quit
\ No newline at end of file

``````````

</details>


https://github.com/llvm/llvm-project/pull/142445