1 ParseReadLine (8): 'ORIG_SHELL:= ${.SHELL}' 2 Var_Parse: ${.SHELL} with VARE_WANTRES|VARE_ASSIGN 3 Global:delete .SHELL (not found) 4 Command:.SHELL = (details omitted) 5 ParseReadLine (10): '.SHELL= overwritten' 6 Global:.SHELL = overwritten 7 Var_Parse: ${.SHELL} != ${ORIG_SHELL} with VARE_UNDEFERR|VARE_WANTRES 8 ParseReadLine (18): '.undef .SHELL' 9 Global:delete .SHELL 10 ParseReadLine (19): '.SHELL= newly overwritten' 11 Global:.SHELL = newly overwritten 12 Var_Parse: ${.SHELL} != ${ORIG_SHELL} with VARE_UNDEFERR|VARE_WANTRES 13 ParseReadLine (24): 'all:' 14 exit status 0 15