Disallow multiple custom sections for sourceMappingURL

tc39 · Jun 25, 2024 · f14a7f8 · f14a7f8
1 parent faaf960
commit f14a7f8
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/source-map.bs b/source-map.bs
@@ -562,7 +562,8 @@ a [=byte sequence=] |bytes|, run the following steps:
 1. Return null.
 
 Since WebAssembly is not a textual format and it does not support comments, it supports a single unambiguous extraction method.
-The URL is encoded using [[WasmNamesBinaryFormat]], and it's placed as the content of the [=custom section=].
+The URL is encoded using [[WasmNamesBinaryFormat]], and it's placed as the content of the [=custom section=]. It is invalid for
+tools that generate WebAssembly code to generate two [=custom section=] with the "sourceMappingURL" name.
 
 Linking eval'd code to named generated code
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