Fix swift SIL exception

Tests/StencilTests/EnvironmentSpec.swift

@@ -215,7 +215,8 @@ final class EnvironmentIncludeTemplateTests: XCTestCase {
   override func setUp() {
     super.setUp()
 
-    let path = Path(#file) + ".." + "fixtures"
+    let basePath: String = #file
+    let path = Path(basePath) + ".." + "fixtures"
     let loader = FileSystemLoader(paths: [path])
     environment = Environment(loader: loader)
     template = ""
@@ -291,7 +292,8 @@ final class EnvironmentBaseAndChildTemplateTests: XCTestCase {
   override func setUp() {
     super.setUp()
 
-    let path = Path(#file) + ".." + "fixtures"
+    let basePath: String = #file
+    let path = Path(basePath) + ".." + "fixtures"
     let loader = FileSystemLoader(paths: [path])
     environment = Environment(loader: loader)
     childTemplate = ""

Tests/StencilTests/IncludeSpec.swift

@@ -4,7 +4,10 @@ import Spectre
 import XCTest
 
 final class IncludeTests: XCTestCase {
-  let path = Path(#file) + ".." + "fixtures"
+  let path: Path = {
+    let basePath: String = #file
+    return Path(basePath) + ".." + "fixtures"
+  }()
   lazy var loader = FileSystemLoader(paths: [path])
   lazy var environment = Environment(loader: loader)
 

Tests/StencilTests/InheritanceSpec.swift

@@ -4,7 +4,10 @@ import Stencil
 import XCTest
 
 final class InheritanceTests: XCTestCase {
-  let path = Path(#file) + ".." + "fixtures"
+  let path: Path = {
+    let basePath: String = #file
+    return Path(basePath) + ".." + "fixtures"
+  }()
   lazy var loader = FileSystemLoader(paths: [path])
   lazy var environment = Environment(loader: loader)
 

Tests/StencilTests/LexerSpec.swift

@@ -117,7 +117,8 @@ final class LexerTests: XCTestCase {
   }
 
   func testPerformance() throws {
-    let path = Path(#file) + ".."  + "fixtures" + "huge.html"
+    let basePath: String = #file
+    let path = Path(basePath) + ".."  + "fixtures" + "huge.html"
     let content: String = try path.read()
 
     measure {

Tests/StencilTests/LoaderSpec.swift

@@ -5,7 +5,8 @@ import XCTest
 
 final class TemplateLoaderTests: XCTestCase {
   func testFileSystemLoader() {
-    let path = Path(#file) + ".."  + "fixtures"
+    let basePath: String = #file
+    let path = Path(basePath) + ".." + "fixtures"
     let loader = FileSystemLoader(paths: [path])
     let environment = Environment(loader: loader)