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Pete Bacon Darwin
dc06873c72
When a source-map has an inline source, any source-map linked from that source should only be loaded if itself is also inline; it should not attempt to load a source-map from the file-system. Otherwise we can find ourselves with inadvertent infinite cyclic dependencies. For example, if a transpiler takes a file (e.g. index.js) and generates a new file overwriting the original file - capturing the original source inline in the new source-map (index.js.map) - the source file loader might read the inline original file (also index.js) and then try to load the `index.js.map` file from disk - ad infinitum. Note that the first call to `loadSourceFile()` is special, since you can pass in the source-file and source-map contents directly as in-memory strrngs. This is common if the transpiler has just generated these and has not yet written them to disk. When the contents are passed into `loadSourceFile()` directly, they are not treated as "inline" for the purposes described above since there is no chance of these "in-memory" source and source-map contents being caught up in a cyclic dependency. Fixes #40408 PR Close #40435