[Clang] Don't crash if input file is not a module. (#98439)

Currently clang crashes with `-module-file-info` and input file which is
not a module
Emit error instead of segfaulting.
Fix #98365

1 files changed, 9 insertions, 2 deletions

diff --git a/clang/lib/Frontend/FrontendActions.cpp b/clang/lib/Frontend/FrontendActions.cpp
index 4f06432..e70210d 100644
--- a/clang/lib/Frontend/FrontendActions.cpp
+++ b/clang/lib/Frontend/FrontendActions.cpp
@@ -841,9 +841,16 @@ static StringRef ModuleKindName(Module::ModuleKind MK) {
 }
 
 void DumpModuleInfoAction::ExecuteAction() {
-  assert(isCurrentFileAST() && "dumping non-AST?");
-  // Set up the output file.
   CompilerInstance &CI = getCompilerInstance();
+
+  // Don't process files of type other than module to avoid crash
+  if (!isCurrentFileAST()) {
+    CI.getDiagnostics().Report(diag::err_file_is_not_module)
+        << getCurrentFile();
+    return;
+  }
+
+  // Set up the output file.
   StringRef OutputFileName = CI.getFrontendOpts().OutputFile;
   if (!OutputFileName.empty() && OutputFileName != "-") {
     std::error_code EC;