`history-transform' was returning '() at the end of a chain of
authorChris Hanson <org/chris-hanson/cph>
Tue, 2 Jun 1987 11:26:07 +0000 (11:26 +0000)
committerChris Hanson <org/chris-hanson/cph>
Tue, 2 Jun 1987 11:26:07 +0000 (11:26 +0000)
commitffad42a1b7ac60ed236c74d43217b25aeed02fe7
tree420e47c2c60c4c4904f14510a37b7ab5fa57ad24
parent1e15eabc230ef1b07a959f60d6b08fba4bd982b2
`history-transform' was returning '() at the end of a chain of
subproblems, instead of the value of `the-empty-history'.  This caused
the debugger to signal an error when walking past the end of the
history.
v7/src/runtime/histry.scm