[TVMScript] Improved error message for unexpected top frame #14399
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Previously, the error messasge from `FindPrimFuncFrame`, `FindBlockFrame`, and `FindIfFrame` stated that they could not find the requested frame when the top-most frame did not match the requested type. This error message could be misinterpreted by a user as stating that the frame didn't exist at all. This commit updates the error message to distinguish between the case of a missing frame (e.g. `T.reads()` occurring outside of any `T.block()` frame) and a frame not being top-most (e.g. `T.reads()` occurring inside a `T.block()`, but inside an `if` conditional instead of the top of the block).
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Previously, the error messasge from
FindPrimFuncFrame,FindBlockFrame, andFindIfFramestated that they could not find the requested frame when the top-most frame did not match the requested type. This error message could be misinterpreted by a user as stating that the frame didn't exist at all.This commit updates the error message to distinguish between the case of a missing frame (e.g.
T.reads()occurring outside of anyT.block()frame) and a frame not being top-most (e.g.T.reads()occurring inside aT.block(), but inside anifconditional instead of the top of the block).