Fix crash by checking if nominal type is null

zoecarver · zoecarver · commit a8d162fd1fdb · 2019-11-01T10:16:44.000-07:00
diff --git a/lib/SILOptimizer/SILCombiner/SILCombinerApplyVisitors.cpp b/lib/SILOptimizer/SILCombiner/SILCombinerApplyVisitors.cpp
@@ -904,7 +904,7 @@ SILCombiner::buildConcreteOpenedExistentialInfoFromSoleConformingType(
         (archetypeTy->getConformsTo().size() == 1)) {
       PD = archetypeTy->getConformsTo()[0];
     } else if (ArgType.isExistentialType() && !ArgType.isAnyObject() &&
-               !SwiftArgType->isAny()) {
+               !SwiftArgType->isAny() && SwiftArgType->getAnyNominal()) {
       PD = dyn_cast<ProtocolDecl>(SwiftArgType->getAnyNominal());
     }
   }

Original file line number	Diff line number	Diff line change
`@@ -904,7 +904,7 @@ SILCombiner::buildConcreteOpenedExistentialInfoFromSoleConformingType(`
`904`	`904`	`(archetypeTy->getConformsTo().size() == 1)) {`
`905`	`905`	`PD = archetypeTy->getConformsTo()[0];`
`906`	`906`	`} else if (ArgType.isExistentialType() && !ArgType.isAnyObject() &&`
`907`		`- !SwiftArgType->isAny()) {`
	`907`	`+ !SwiftArgType->isAny() && SwiftArgType->getAnyNominal()) {`
`908`	`908`	`PD = dyn_cast<ProtocolDecl>(SwiftArgType->getAnyNominal());`
`909`	`909`	`}`
`910`	`910`	`}`