Fixes crashes in inliner: do not inline if icdata was cleared.

runtime/vm/weak_code.cc

Index: runtime/vm/weak_code.cc
diff --git a/runtime/vm/weak_code.cc b/runtime/vm/weak_code.cc
index d68cfff89d3fe34e3d1226ceafa39482889ecc4a..1305443c33e909a57ffd00c6c814fd5c2ace3cb3 100644
--- a/runtime/vm/weak_code.cc
+++ b/runtime/vm/weak_code.cc
@@ -113,6 +113,7 @@ void WeakCodeReferences::DisableCode() {
       function.SwitchToUnoptimizedCode();
     } else if (function.unoptimized_code() == code.raw()) {
       ReportSwitchingCode(code);
+      function.set_was_compiled(false);
       function.ClearICDataArray();
       // Remove the code object from the function. The next time the
       // function is invoked, it will be compiled again.