go - 恐慌：接口转换：ast.Expr 是 *ast.CallExpr，而不是 *ast.Ident，解决办法是什么？

goroutine 1 [running]: github.com/hyperledger-labs/chaincode-analyzer/analyze.pickUpTargetVar(0xc0000d2210, 0x684a30, 0xc0000b8d00) /home/aai/go/pkg/mod/github.com/hyperledger-labs/chaincode-analyzer@v0.0.0-20200326141029-a98b7983ce34/analyze/analyze.go:466 +0xf3c github.com/hyperledger-labs/chaincode-analyzer/analyze.walkAssignStmt(0xc0000d2210, 0xc0000b8d40) /home/aai/go/pkg/mod/github.com/hyperledger-labs/chaincode-analyzer@v0.0.0-20200326141029-a98b7983ce34/analyze/analyze.go:554 +0x26f github.com/hyperledger-labs/chaincode-analyzer/analyze.walkStmt(0xc0000d2210, 0x686c18, 0xc0000b8d40) /home/aai/go/pkg/mod/github.com/hyperledger-labs/chaincode-analyzer@v0.0.0-20200326141029-a98b7983ce34/analyze/analyze.go:679 +0x4ac github.com/hyperledger-labs/chaincode-analyzer/analyze.walkStmt(0xc0000d2210, 0x686d38, 0xc00008f590) /home/aai/go/pkg/mod/github.com/hyperledger-labs/chaincode-analyzer@v0.0.0-20200326141029-a98b7983ce34/analyze/analyze.go:682 +0x10e github.com/hyperledger-labs/chaincode-analyzer/analyze.walkRangeStmt(0xc0000d2210, 0xc0000818b0) /home/aai/go/pkg/mod/github.com/hyperledger-labs/chaincode-analyzer@v0.0.0-20200326141029-a98b7983ce34/analyze/analyze.go:649 +0x6d github.com/hyperledger-labs/chaincode-analyzer/analyze.walkStmt(0xc0000d2210, 0x687278, 0xc0000818b0) /home/aai/go/pkg/mod/github.com/hyperledger-labs/chaincode-analyzer@v0.0.0-20200326141029-a98b7983ce34/analyze/analyze.go:696 +0x7cc github.com/hyperledger-labs/chaincode-analyzer/analyze.walkStmt(0xc0000d2210, 0x686d38, 0xc00008f5c0) /home/aai/go/pkg/mod/github.com/hyperledger-labs/chaincode-analyzer@v0.0.0-20200326141029-a98b7983ce34/analyze/analyze.go:682 +0x10e github.com/hyperledger-labs/chaincode-analyzer/analyze.(*file).storeInfo.func1(0x684cb0, 0xc00008f5f0, 0x685000) /home/aai/go/pkg/mod/github.com/hyperledger-labs/chaincode-analyzer@v0.0.0-20200326141029-a98b7983ce34/analyze/analyze.go:743 +0xe5 github.com/hyperledger-labs/chaincode-analyzer/analyze.walker.Visit(0xc0001c1938, 0x684cb0, 0xc00008f5f0, 0x0, 0x0) /home/aai/go/pkg/mod/github.com/hyperledger-labs/chaincode-analyzer@v0.0.0-20200326141029-a98b7983ce34/analyze/analyze.go:1119 +0x3a go/ast.Walk(0x684348, 0xc0001c1938, 0x684cb0, 0xc00008f5f0) /usr/local/go/src/go/ast/walk.go:52 +0x63 go/ast.walkDeclList(0x684348, 0xc0001c1938, 0xc0000ca500, 0xa, 0x10) /usr/local/go/src/go/ast/walk.go:38 +0x9e go/ast.Walk(0x684348, 0xc0001c1938, 0x684c60, 0xc0000c8400) /usr/local/go/src/go/ast/walk.go:353 +0x2446 github.com/hyperledger-labs/chaincode-analyzer/analyze.(*file).walk(...) /home/aai/go/pkg/mod/github.com/hyperledger-labs/chaincode-analyzer@v0.0.0-20200326141029-a98b7983ce34/analyze/analyze.go:1111 github.com/hyperledger-labs/chaincode-analyzer/analyze.(*file).storeInfo(0xc00011a550, 0xc0000d2210) /home/aai/go/pkg/mod/github.com/hyperledger-labs/chaincode-analyzer@v0.0.0-20200326141029-a98b7983ce34/analyze/analyze.go:737 +0x94 github.com/hyperledger-labs/chaincode-analyzer/analyze.(*file).analyze(0xc00011a550) /home/aai/go/pkg/mod/github.com/hyperledger-labs/chaincode-analyzer@v0.0.0-20200326141029-a98b7983ce34/analyze/analyze.go:1090 +0x385 github.com/hyperledger-labs/chaincode-analyzer/analyze.(*pkg).analyze(0xc000081310, 0xc00008e960, 0x7fff19af23b9, 0x9) /home/aai/go/pkg/mod/github.com/hyperledger-labs/chaincode-analyzer@v0.0.0-20200326141029-a98b7983ce34/analyze/analyze.go:115 +0xcc github.com/hyperledger-labs/chaincode-analyzer/analyze.(*Analyzer).AnalyzeFiles(0xc0000a7b28, 0xc0000812c0, 0xc0000a7c38, 0x9, 0xc0000a7d98, 0x0, 0x0, 0xc00008c510) /home/aai/go/pkg/mod/github.com/hyperledger-labs/chaincode-analyzer@v0.0.0-20200326141029-a98b7983ce34/analyze/analyze.go:63 +0x5e5 main.analyzeFiles(0xc0000812c0, 0xc00008c530, 0x1, 0x1) /usr/local/go/bin/chaincode-analyzer-master/ccanalyzer.go:120 +0x1b9 main.main() /usr/local/go/bin/chaincode-analyzer-master/ccanalyzer.go:66 +0x517