Fix crash when loading modules with syntax errors (#6993) (#7288)

* Fix#6993 - Emit Diagnostic Warning and Fix SIGSEGV

* Update external/slang-rhi submodule

* Add checks for valid stage names for paq in SemanticsVisitor check

* format code

---------

Co-authored-by: slangbot <186143334+slangbot@users.noreply.github.com>
Co-authored-by: Ellie Hermaszewska <ellieh@nvidia.com>

1 files changed, 14 insertions, 0 deletions

diff --git a/tests/diagnostics/invalid-paq-stage-names.slang b/tests/diagnostics/invalid-paq-stage-names.slang
new file mode 100644
index 000000000..8547b7d5a
--- /dev/null
+++ b/tests/diagnostics/invalid-paq-stage-names.slang
@@ -0,0 +1,14 @@
+//DIAGNOSTIC_TEST:SIMPLE(filecheck=CHECK): -target hlsl
+
+// CHECK: ([[# @LINE+3]]): error 40001:
+struct [raypayload] ValidRayPayload
+{
+    float4 color : read(anyht, closesthit, miss) : write(caller);
+};
+
+[shader("raygeneration")]
+void rayGenShader()
+{
+    ValidRayPayload payload;
+    // Just a placeholder function to avoid unused struct warning
+}