Invalid `pred` in `when` swallowed

[arnetheduck]

Nim Version

2.2.4

Description

type X = enum
  a
  b

when pred(a) == b:
  echo "a"
else:
  echo "b"

pred(a) is not well-defined - this should fail to compile

Current Output

Compiles

Expected Output

Compile-time error

Known Workarounds

No response

Additional Information

No response

[ringabout]

It seems that an extra VM opcode needs to be introduced for rangecheck