diff --git a/LeadKit.xcodeproj/project.pbxproj b/LeadKit.xcodeproj/project.pbxproj
index 8041c081..a3065307 100644
--- a/LeadKit.xcodeproj/project.pbxproj
+++ b/LeadKit.xcodeproj/project.pbxproj
@@ -3180,6 +3180,7 @@
 				INSTALL_PATH = "$(LOCAL_LIBRARY_DIR)/Frameworks";
 				IPHONEOS_DEPLOYMENT_TARGET = 9.0;
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
+				OTHER_SWIFT_FLAGS = "$(inherited) -Xfrontend -warn-long-expression-type-checking=200 -Xfrontend -warn-long-function-bodies=200 -Xfrontend -debug-time-function-bodies";
 				PRODUCT_BUNDLE_IDENTIFIER = "ru.touchin.LeadKit-iOS";
 				PRODUCT_NAME = LeadKit;
 				SKIP_INSTALL = YES;
@@ -3205,6 +3206,7 @@
 				INSTALL_PATH = "$(LOCAL_LIBRARY_DIR)/Frameworks";
 				IPHONEOS_DEPLOYMENT_TARGET = 9.0;
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
+				OTHER_SWIFT_FLAGS = "$(inherited) -Xfrontend -warn-long-expression-type-checking=200 -Xfrontend -warn-long-function-bodies=200 -Xfrontend -debug-time-function-bodies";
 				PRODUCT_BUNDLE_IDENTIFIER = "ru.touchin.LeadKit-iOS";
 				PRODUCT_NAME = LeadKit;
 				SKIP_INSTALL = YES;
@@ -3267,6 +3269,7 @@
 				INFOPLIST_FILE = "$(SRCROOT)/Sources/Info-watchOS.plist";
 				INSTALL_PATH = "$(LOCAL_LIBRARY_DIR)/Frameworks";
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
+				OTHER_SWIFT_FLAGS = "$(inherited) -Xfrontend -warn-long-expression-type-checking=200 -Xfrontend -warn-long-function-bodies=200 -Xfrontend -debug-time-function-bodies";
 				PRODUCT_BUNDLE_IDENTIFIER = "ru.touchin.LeadKit-watchOS";
 				PRODUCT_NAME = LeadKit;
 				SDKROOT = watchos;
@@ -3295,6 +3298,7 @@
 				INFOPLIST_FILE = "$(SRCROOT)/Sources/Info-watchOS.plist";
 				INSTALL_PATH = "$(LOCAL_LIBRARY_DIR)/Frameworks";
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
+				OTHER_SWIFT_FLAGS = "$(inherited) -Xfrontend -warn-long-expression-type-checking=200 -Xfrontend -warn-long-function-bodies=200 -Xfrontend -debug-time-function-bodies";
 				PRODUCT_BUNDLE_IDENTIFIER = "ru.touchin.LeadKit-watchOS";
 				PRODUCT_NAME = LeadKit;
 				SDKROOT = watchos;
@@ -3321,6 +3325,7 @@
 				INFOPLIST_FILE = "$(SRCROOT)/Sources/Info-tvOS.plist";
 				INSTALL_PATH = "$(LOCAL_LIBRARY_DIR)/Frameworks";
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
+				OTHER_SWIFT_FLAGS = "$(inherited) -Xfrontend -warn-long-expression-type-checking=200 -Xfrontend -warn-long-function-bodies=200 -Xfrontend -debug-time-function-bodies";
 				PRODUCT_BUNDLE_IDENTIFIER = "ru.touchin.LeadKit-tvOS";
 				PRODUCT_NAME = LeadKit;
 				SDKROOT = appletvos;
@@ -3348,6 +3353,7 @@
 				INFOPLIST_FILE = "$(SRCROOT)/Sources/Info-tvOS.plist";
 				INSTALL_PATH = "$(LOCAL_LIBRARY_DIR)/Frameworks";
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
+				OTHER_SWIFT_FLAGS = "$(inherited) -Xfrontend -warn-long-expression-type-checking=200 -Xfrontend -warn-long-function-bodies=200 -Xfrontend -debug-time-function-bodies";
 				PRODUCT_BUNDLE_IDENTIFIER = "ru.touchin.LeadKit-tvOS";
 				PRODUCT_NAME = LeadKit;
 				SDKROOT = appletvos;
@@ -3416,6 +3422,7 @@
 				INSTALL_PATH = "$(LOCAL_LIBRARY_DIR)/Frameworks";
 				IPHONEOS_DEPLOYMENT_TARGET = 9.0;
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
+				OTHER_SWIFT_FLAGS = "$(inherited) -Xfrontend -warn-long-expression-type-checking=200 -Xfrontend -warn-long-function-bodies=200 -Xfrontend -debug-time-function-bodies";
 				PRODUCT_BUNDLE_IDENTIFIER = "ru.touchin.LeadKit-iOS-Extensions";
 				PRODUCT_NAME = LeadKit;
 				SKIP_INSTALL = YES;
@@ -3442,6 +3449,7 @@
 				INSTALL_PATH = "$(LOCAL_LIBRARY_DIR)/Frameworks";
 				IPHONEOS_DEPLOYMENT_TARGET = 9.0;
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
+				OTHER_SWIFT_FLAGS = "$(inherited) -Xfrontend -warn-long-expression-type-checking=200 -Xfrontend -warn-long-function-bodies=200 -Xfrontend -debug-time-function-bodies";
 				PRODUCT_BUNDLE_IDENTIFIER = "ru.touchin.LeadKit-iOS-Extensions";
 				PRODUCT_NAME = LeadKit;
 				SKIP_INSTALL = YES;
diff --git a/Sources/Extensions/Sequence/Sequence+ConcurrentMap.swift b/Sources/Extensions/Sequence/Sequence+ConcurrentMap.swift
index 1353d397..f92e7ae9 100644
--- a/Sources/Extensions/Sequence/Sequence+ConcurrentMap.swift
+++ b/Sources/Extensions/Sequence/Sequence+ConcurrentMap.swift
@@ -59,7 +59,10 @@ public extension Sequence {
                     .map { (idx: $0.idx, results: try array[$0.range].map(transform)) }
             }
             .toArray()
-            .map { $0.sorted { $0.idx < $1.idx }.flatMap { $0.results } }
+            .map { array -> [R] in
+                array.sorted { $0.idx < $1.idx }
+                    .flatMap { $0.results }
+            }
     }
 
 }