js.debugger.fix.jspm.source.maps

platform/script-debugger/backend/src/org/jetbrains/debugger/sourcemap/SourceMapDecoder.kt

@@ -16,6 +16,7 @@
 package org.jetbrains.debugger.sourcemap
 
 import com.google.gson.stream.JsonToken
+import com.intellij.openapi.util.registry.Registry
 import com.intellij.openapi.util.text.StringUtil
 import com.intellij.openapi.util.text.StringUtilRt
 import com.intellij.util.PathUtil
@@ -144,6 +145,10 @@ private fun parseMap(reader: JsonReaderEx,
     return null
   }
 
+  if (Registry.`is`("js.debugger.fix.jspm.source.maps", false) && encodedMappings!!.startsWith(";") && file != null && file.endsWith(".ts!transpiled")) {
+    encodedMappings = encodedMappings.substring(1)
+  }
+
   if (version != 3) {
     throw IOException("Unsupported sourcemap version: $version")
   }

platform/util/resources/misc/registry.properties

@@ -556,6 +556,7 @@ nodejs.debugger.use.jb.support=true
 js.debugger.name.mappings.by.source.code=false
 js.debugger.v8.log=
 js.debugger.wip.log=
+js.debugger.fix.jspm.source.maps=false
 
 js.index.node.submodules=false