behaviour of `load' with $ characters

[Tom Capey]

In GNU Emacs 20.6.1 (i386-*-nt5.0.2195)
 of Thu Mar  9 2000 on CARDINALE
configured using `configure NT'

Please describe exactly what actions triggered the bug
and the precise symptoms of the bug:

  the behaviour of `load' seems aberrant with respect to $
  substitution.  it attempts to expand the $ in the code below.
  (the example is for a UNC path, but the same behaviour is
  observed for "c:/"-style device paths).

(load "//spanna/Apps$$/hello.el")  ==> t
(load "//spanna/Apps$/hello.el") error
(load "/://spanna/Apps$$/hello.el") ==> t
(load "/://spanna/Apps$/hello.el") error

(file-exists-p "//spanna/Apps$$/hello.el") ==> nil
(file-exists-p "//spanna/Apps$/hello.el")  ==> t
(file-exists-p "/://spanna/Apps$$/hello.el") ==> nil
(file-exists-p "/://spanna/Apps$/hello.el") ==> t


Error stack trace:
Signaling: (error "Substituting nonexistent environment variable \"\"")
  load("//spanna/Apps$/hello.el")
  eval((load "//spanna/Apps$/hello.el"))
  eval-last-sexp(nil)
  call-interactively(eval-last-sexp)


/Tom
-- 
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  And you're in for a big surprise!'' -- Dave Frishberg