[MacPorts] #63687: legacy-support-devel @20211026: fish hangs in macports_legacy_realpath

[MacPorts]

#63687: legacy-support-devel @20211026: fish hangs in macports_legacy_realpath
------------------------+-----------------------------------
 Reporter:  evanmiller  |      Owner:  cjones051073
     Type:  defect      |     Status:  assigned
 Priority:  Normal      |  Milestone:
Component:  ports       |    Version:  2.7.1
 Keywords:              |       Port:  macports-legacy-devel
------------------------+-----------------------------------
 When I switch from {{{legacy-support}}} 1.0.4 to the latest {{{legacy-
 support-devel}}}, I cannot start fish (program hangs). Instruments shows
 this sample report:

 {{{
 # Report 0 - Timed Samples for Unattached
 Stacks at 2021-10-27 12:16:52 -0400
 Samples (displayed/total): 238/238
 Call graph:
     238 Thread_5f03
       238 start
         238 _start
           122 macports_legacy_realpath
             122 macports_legacy_realpath
           116 main
             116 macports_legacy_realpath
               116 macports_legacy_realpath

 Total number in stack (recursive counted multiple, when >=5):

 Sort by top of stack, same collapsed (when >= 5):
         macports_legacy_realpath        238
 }}}

 I am guessing this wrapped function can be disabled but I'd rather
 understand the root cause here. Shell starts normally after switching back
 to legacy-support.

 It was a "hot swap" without a rebuild. 10.4.11/PowerPC

-- 
Ticket URL: <https://trac.macports.org/ticket/63687>
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