interp: add safeguards when searching for vendor root. #1522
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With certain yaegi configuration on Windows, the loop in previousRoot can be infinite, because it fails to recognize driver letters as root. This change adds a few more safeguards: checks path prefix earlier and checks if filepath.Dir produces an empty path.
mvertes
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With certain yaegi configuration on Windows, the loop in
previousRootcan be infinite, because it fails to recognize driver letters as root.This change adds a few more safeguards: checks path prefix earlier and checks if
filepath.Dirproduces an empty path.