New Ada RTS failure overnight

[Richard Kenner]

This didn't happen yesterday:

../../xgcc -B../../ -c -g -O2      -W -Wall -gnatpg  g-regexp.adb -o g-regexp.o
g-regexp.adb: In function 'GNAT.REGEXP.SET':
g-regexp.adb:1352: error: Type mismatch between an SSA_NAME and its symbol.
g-regexp.adb:1352: error: Missing definition
for SSA_NAME: table_237in statement:
table_1 = PHI <table_12(19), table_237(20)>;