Fix crash when considering invalid binary operator function for resol…

…ution <rdar://23719809&23720006> This fixes compiler crashes resulting from an invalid FuncDecl which is later considered while resolving a binary application.
ATeamMac2014 · Dec 4, 2015 · 56e13fc · 56e13fc
1 parent c959ce2
commit 56e13fc
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Showing 2 changed files with 16 additions and 1 deletion.
diff --git a/lib/Sema/CSGen.cpp b/lib/Sema/CSGen.cpp
@@ -752,7 +752,10 @@ namespace {
       }
 
       Type paramTy = fnTy->getInput();
-      auto paramTupleTy = paramTy->castTo<TupleType>();
+      auto paramTupleTy = paramTy->getAs<TupleType>();
+      if (!paramTupleTy || paramTupleTy->getNumElements() != 2)
+        return false;
+
       auto firstParamTy = paramTupleTy->getElement(0).getType();
       auto secondParamTy = paramTupleTy->getElement(1).getType();
 

diff --git a/validation-test/compiler_crashers_2_fixed/0036-rdar23719809.swift b/validation-test/compiler_crashers_2_fixed/0036-rdar23719809.swift
@@ -0,0 +1,12 @@
+// RUN: not %target-swift-frontend %s -parse
+
+// rdar://problem/23719809&23720006
+
+func ~=() {}
+func ~=(_: Int) {}
+func ~=(_: () -> ()) {}
+
+switch 0 {
+case 0:
+    break
+}