Exceptions have a hardcoded message

[driazati]

raise statements in the JIT always raise with the string "Exception". They should instead use the user supplied arguments

Example

@torch.jit.script
def fn(x):
    # type: (int) -> int
    if x > 2:
        raise RuntimeError("bad input, {} is too high".format(x))
    return x + 3

print(fn.graph)
print(fn(4))

Outputs the graph

graph(%x : int):
  %3 : string = prim::Constant[value="Exception"]()
  %1 : int = prim::Constant[value=2]()
  %5 : int = prim::Constant[value=3]()
  %2 : bool = aten::gt(%x, %1)
   = prim::If(%2)
    block0():
       = prim::RaiseException(%3)
      -> ()
    block1():
      -> ()
  %6 : int = aten::add(%x, %5)
  return (%6)

cc @ezyang @gchanan @zou3519 @suo @gmagogsfm

[jansel]

In progress PR for this that got dropped.

[eellison]

#34112 is the PR that was about ready to go and dropped

[suo]

@gmagogsfm is there a linked PR for this?

[gmagogsfm]

@gmagogsfm is there a linked PR for this?

yes, added

[gmagogsfm]

PR merged, closing.