for-comprehension-old.scala:2: error: assignment in for comprehension must be preceded by `val`
  for (x <- 1 to 5 ; y = x) yield x+y           // fail
                       ^
for-comprehension-old.scala:4: error: val in for comprehension must be followed by assignment
  for (val x <- 1 to 5 ; y = x) yield x+y       // fail
             ^
for-comprehension-old.scala:4: error: assignment in for comprehension must be preceded by `val`
  for (val x <- 1 to 5 ; y = x) yield x+y       // fail
                           ^
for-comprehension-old.scala:5: error: val in for comprehension must be followed by assignment
  for (val x <- 1 to 5 ; val y = x) yield x+y   // fail
             ^
for-comprehension-old.scala:7: error: assignment in for comprehension must be preceded by `val`
  for (z <- 1 to 2 ; x <- 1 to 5 ; y = x) yield x+y           // fail
                                     ^
for-comprehension-old.scala:9: error: val in for comprehension must be followed by assignment
  for (z <- 1 to 2 ; val x <- 1 to 5 ; y = x) yield x+y       // fail
                           ^
for-comprehension-old.scala:9: error: assignment in for comprehension must be preceded by `val`
  for (z <- 1 to 2 ; val x <- 1 to 5 ; y = x) yield x+y       // fail
                                         ^
for-comprehension-old.scala:10: error: val in for comprehension must be followed by assignment
  for (z <- 1 to 2 ; val x <- 1 to 5 ; val y = x) yield x+y   // fail
                           ^
8 errors found