Initial tree-shaking for precompilation: only selective compilation, no removal of unused Functions…

runtime/vm/compiler.cc

Index: runtime/vm/compiler.cc
diff --git a/runtime/vm/compiler.cc b/runtime/vm/compiler.cc
index 01c18ac86d50a9af2ab20590cc63361f9280bb76..1eb55f3ab31abfe529aa90cbd2e5a5a5b02e523f 100644
--- a/runtime/vm/compiler.cc
+++ b/runtime/vm/compiler.cc
@@ -1112,8 +1112,9 @@ RawError* Compiler::CompileFunction(Thread* thread,
   TIMELINE_FUNCTION_COMPILATION_DURATION(isolate, "Function", function);
 
   if (!isolate->compilation_allowed()) {
-    FATAL2("Precompilation missed function %s (%s)\n",
-           function.ToQualifiedCString(),
+    FATAL3("Precompilation missed function %s (%" Pd ", %s)\n",
+           function.ToLibNamePrefixedQualifiedCString(),
+           function.token_pos(),
            Function::KindToCString(function.kind()));
   }