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PiperOrigin-RevId: 738130612

Author: Googler

swift/internal/toolchain_utils.bzl

@@ -55,7 +55,7 @@ def get_swift_toolchain(
         if group and toolchain_type in group.toolchains:
             return group.toolchains[toolchain_type].swift_toolchain
 
-    if toolchain_type in ctx.toolchains:
+    if toolchain_type in ctx.toolchains and ctx.toolchains[toolchain_type]:
         return ctx.toolchains[toolchain_type].swift_toolchain
 
     # TODO(b/205018581): Delete this code path when migration to the new