当我尝试使用以下命令从这里构建乒乓球智能合约时：
erdpy build contract
我没有得到以下预期输出：
INFO:projects.core:WASM file generated: output/ping-pong.wasm
因为文件中出现以下错误sc_results.rs：
Compiling elrond-codec v0.5.3
Compiling elrond-wasm v0.18.2
error[E0432]: unresolved import `core::ops::FromResidual`
--> /Users/<username>/elrondsdk/vendor-rust/registry/src/github.com-1ecc6299db9ec823/elrond-wasm-0.18.2/src/types/io/sc_result.rs:7:30
...
error[E0437]: type Output is not a member of trait `Try`
--> /Users/<username>/elrondsdk/vendor-rust/registry/src/github.com-1ecc6299db9ec823/elrond-wasm-0.18.2/src/types/io/sc_result.rs:62:5
...
error[E0437]: type Residual is not a member of trait `Try`
--> /Users/<username>/elrondsdk/vendor-rust/registry/src/github.com-1ecc6299db9ec823/elrond-wasm-0.18.2/src/types/io/sc_result.rs:63:5
...
error[E0407]: method branch is not a member of trait `Try`
--> /Users/<username>/elrondsdk/vendor-rust/registry/src/github.com-1ecc6299db9ec823/elrond-wasm-0.18.2/src/types/io/sc_result.rs:65:5
...
error[E0407]: method from_output is not a member of trait `Try`
--> /Users/<username>/elrondsdk/vendor-rust/registry/src/github.com-1ecc6299db9ec823/elrond-wasm-0.18.2/src/types/io/sc_result.rs:71:5
...
error aborting …