INFO: (1) Recursively removing

Error: (directory-fold) bad argument type - not a directory:

        Call history:

        common.scm:1320: call-with-current-continuation
        common.scm:1320: with-exception-handler
        common.scm:1320: ##sys#call-with-values
        common.scm:1325: thunk
        common.scm:1331: file-exists?
        common.scm:1320: k2586
        common.scm:1320: g2590
        runs.scm:2689: runs:safe-delete-test-dir
        runs.scm:2161: directory-utils#directory-fold
        runs.scm:2168: directory-utils#directory-fold
        type-errors.scm:124: make-error-type-message
        type-errors.scm:109: make-bad-argument-message
        type-errors.scm:111: make-type-name-message
        type-errors.scm:271: ->string
        type-errors.scm:272: conc
        type-errors.scm:108: string-append              <--
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