Fall back to inlining intervals to generate stack traces in --noopt. Inlined frames will lack line …

runtime/vm/profiler_service.cc

Index: runtime/vm/profiler_service.cc
diff --git a/runtime/vm/profiler_service.cc b/runtime/vm/profiler_service.cc
index 1aba7d3243c34f5a388363f01076bb15c84efd92..17a8a73ddcaadad6952a3a45af3a86d0beb9de78 100644
--- a/runtime/vm/profiler_service.cc
+++ b/runtime/vm/profiler_service.cc
@@ -1390,6 +1390,11 @@ class ProfileBuilder : public ValueObject {
     GrowableArray<Function*> inlined_functions;
     if (!code.IsNull()) {
       intptr_t offset = pc - code.EntryPoint();
+      if (frame_index != 0) {
+        // The PC of frames below the top frame is a call's return address,
+        // which can belong to a different inlining interval than the call.
+        offset--;
+      }
       code.GetInlinedFunctionsAt(offset, &inlined_functions);
     }
     if (code.IsNull() || (inlined_functions.length() == 0)) {