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In K1 mode, the IrCall node for the !! operator stores startOffset at the '!' character rather than at the start of the operand. This means that x!! was previously reported as spanning from '!' to the end of the expression, omitting the operand from the location. Fix this by computing the NotNullExpr location from the value argument's startOffset (the operand) to c.endOffset. This matches the K2 behaviour where the IrCall.startOffset already points at the operand. The fix guards against invalid (< 0) offsets on either side and falls back to the default IrCall location in those cases. Updated expected files in test-kotlin1: - exprs/unaryOp.expected: !! locations now start at operand column - exprs/exprs.expected: same (NotNullExpr entries corrected) - exprs/binop.expected: !! child locations now correct (parent binop location for s!!.plus(5) still differs due to a separate K1 IR limitation where the enclosing call inherits the wrong receiver offset) - controlflow/basic/bbStmts.expected: CFG references to !! now use the improved location - controlflow/basic/getASuccessor.expected: same Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>