> ninja install-core
[1/4] Compiled build\debug\third_party\mozjs\platform\x86_64\windows\build\jit\Unified_cpp_js_src_jit2.obj
FAILED: build/debug/third_party/mozjs/platform/x86_64/windows/build/jit/Unified_cpp_js_src_jit2.obj
cmd.exe /c del /q build\debug\third_party\mozjs\platform\x86_64\windows\build\jit\Unified_cpp_js_src_jit2.obj >nul 2>&1 & cl @build\debug\third_party\mozjs\platform\x86_64\windows\build\jit\Unified_cpp_js_src_jit2.obj.rsp
src\third_party\mozjs\extract\js\src\jit/CacheIRCompiler.h(1135,3): fatal error C1001: Internal compiler error.
(compiler file '_work\1\s\src\vctools\Compiler\CxxFE\sl\p1\c\main.c', line 2018)
 To work around this problem, try simplifying or changing the program near the locations listed above.
If possible please provide a repro here: https://developercommunity.visualstudio.com
Please choose the Technical Support command on the Visual C++
 Help menu, or open the Technical Support help file for more information
  void call() {
  ^
src\third_party\mozjs\extract\js\src\jit/CacheIRCompiler.cpp(6394,64): note: see reference to function template instantiation '<Unknown>' being compiled
      callvm.call<FnBigIntString, BigIntStringEqual<NotEqual>>();
                                                               ^
ninja: build stopped: subcommand failed.

diff --git a/src/third_party/mozjs/extract/js/src/jit/CacheIRCompiler.cpp b/src/third_party/mozjs/extract/js/src/jit/CacheIRCompiler.cpp
index 971cf006f8a..92bfca7d151 100644
--- a/src/third_party/mozjs/extract/js/src/jit/CacheIRCompiler.cpp
+++ b/src/third_party/mozjs/extract/js/src/jit/CacheIRCompiler.cpp
@@ -6373,66 +6373,41 @@ bool CacheIRCompiler::emitCompareBigIntStringResult(JSOp op,
   using FnStringBigInt =
       bool (*)(JSContext*, HandleString, HandleBigInt, bool*);

-  switch (op) {
-    case JSOp::Eq: {
 #ifndef _MSC_VER
       constexpr auto Equal = EqualityKind::Equal;
+      constexpr auto NotEqual = EqualityKind::NotEqual;
+      constexpr auto LessThan = ComparisonKind::LessThan;
+      constexpr auto GreaterThanOrEqual = ComparisonKind::GreaterThanOrEqual;
 #else
       // The static_cast works around an internal compiler error in MSVC.
       constexpr auto Equal = static_cast<bool>(EqualityKind::Equal);
+      constexpr auto NotEqual = static_cast<bool>(EqualityKind::NotEqual);
+      constexpr auto LessThan = static_cast<bool>(ComparisonKind::LessThan);
+      constexpr auto GreaterThanOrEqual =
+          static_cast<bool>(ComparisonKind::GreaterThanOrEqual);
 #endif
+  switch (op) {
+    case JSOp::Eq: {
       callvm.call<FnBigIntString, BigIntStringEqual<Equal>>();
       break;
     }
     case JSOp::Ne: {
-#ifndef _MSC_VER
-      constexpr auto NotEqual = EqualityKind::NotEqual;
-#else
-      // The static_cast works around an internal compiler error in MSVC.
-      constexpr auto NotEqual = static_cast<bool>(EqualityKind::NotEqual);
-#endif
       callvm.call<FnBigIntString, BigIntStringEqual<NotEqual>>();
       break;
     }
     case JSOp::Lt: {
-#ifndef _MSC_VER
-      constexpr auto LessThan = ComparisonKind::LessThan;
-#else
-      // The static_cast works around an internal compiler error in MSVC.
-      constexpr auto LessThan = static_cast<bool>(ComparisonKind::LessThan);
-#endif
       callvm.call<FnBigIntString, BigIntStringCompare<LessThan>>();
       break;
     }
     case JSOp::Gt: {
-#ifndef _MSC_VER
-      constexpr auto LessThan = ComparisonKind::LessThan;
-#else
-      // The static_cast works around an internal compiler error in MSVC.
-      constexpr auto LessThan = static_cast<bool>(ComparisonKind::LessThan);
-#endif
       callvm.call<FnStringBigInt, StringBigIntCompare<LessThan>>();
       break;
     }
     case JSOp::Le: {
-#ifndef _MSC_VER
-      constexpr auto GreaterThanOrEqual = ComparisonKind::GreaterThanOrEqual;
-#else
-      // The static_cast works around an internal compiler error in MSVC.
-      constexpr auto GreaterThanOrEqual =
-          static_cast<bool>(ComparisonKind::GreaterThanOrEqual);
-#endif
       callvm.call<FnStringBigInt, StringBigIntCompare<GreaterThanOrEqual>>();
       break;
     }
     case JSOp::Ge: {
-#ifndef _MSC_VER
-      constexpr auto GreaterThanOrEqual = ComparisonKind::GreaterThanOrEqual;
-#else
-      // The static_cast works around an internal compiler error in MSVC.
-      constexpr auto GreaterThanOrEqual =
-          static_cast<bool>(ComparisonKind::GreaterThanOrEqual);
-#endif
       callvm.call<FnBigIntString, BigIntStringCompare<GreaterThanOrEqual>>();
       break;
     }