mirror of
https://github.com/nspcc-dev/neo-go.git
synced 2024-12-23 13:41:37 +00:00
07ee7f7e12
Problem: an attempt to compile the following code leads to a runtime
panic:
```
package foo
var a, b = f()
func Main() int {
return a + b
}
func f() (int, int) {
return 1, 2
}
```
```
panic: runtime error: index out of range [1] with length 1 [recovered]
panic: runtime error: index out of range [1] with length 1
goroutine 22 [running]:
testing.tRunner.func1.2({0xa341c0, 0xc0001647f8})
/usr/local/go/src/testing/testing.go:1209 +0x24e
testing.tRunner.func1()
/usr/local/go/src/testing/testing.go:1212 +0x218
panic({0xa341c0, 0xc0001647f8})
/usr/local/go/src/runtime/panic.go:1038 +0x215
github.com/nspcc-dev/neo-go/pkg/compiler.(*codegen).Visit(0xc0001623c0, {0xc75520, 0xc000155d80})
/home/anna/Documents/GitProjects/nspcc-dev/neo-go/pkg/compiler/codegen.go:591 +0x6559
go/ast.Walk({0xc6c4e0, 0xc0001623c0}, {0xc75520, 0xc000155d80})
/usr/local/go/src/go/ast/walk.go:50 +0x5f
github.com/nspcc-dev/neo-go/pkg/compiler.(*codegen).convertGlobals.func1({0xc75520, 0xc000155d80})
/home/anna/Documents/GitProjects/nspcc-dev/neo-go/pkg/compiler/codegen.go:359 +0x70
go/ast.inspector.Visit(0xc000229740, {0xc75520, 0xc000155d80})
/usr/local/go/src/go/ast/walk.go:375 +0x31
go/ast.Walk({0xc6d920, 0xc000229740}, {0xc75520, 0xc000155d80})
/usr/local/go/src/go/ast/walk.go:50 +0x5f
go/ast.walkDeclList({0xc6d920, 0xc000229740}, {0xc000155e80, 0x3, 0x120})
/usr/local/go/src/go/ast/walk.go:36 +0x87
go/ast.Walk({0xc6d920, 0xc000229740}, {0xc75458, 0xc000156c80})
/usr/local/go/src/go/ast/walk.go:355 +0x15c5
go/ast.Inspect(...)
/usr/local/go/src/go/ast/walk.go:387
github.com/nspcc-dev/neo-go/pkg/compiler.(*codegen).convertGlobals(0xc0001623c0, 0xc000156c80, 0xc000254280)
/home/anna/Documents/GitProjects/nspcc-dev/neo-go/pkg/compiler/codegen.go:354 +0x71
github.com/nspcc-dev/neo-go/pkg/compiler.(*codegen).traverseGlobals.func2(0xc000254280)
/home/anna/Documents/GitProjects/nspcc-dev/neo-go/pkg/compiler/analysis.go:86 +0x16e
github.com/nspcc-dev/neo-go/pkg/compiler.(*codegen).ForEachPackage(0xc0001623c0, 0xc000191b98)
/home/anna/Documents/GitProjects/nspcc-dev/neo-go/pkg/compiler/compiler.go:93 +0xc6
github.com/nspcc-dev/neo-go/pkg/compiler.(*codegen).traverseGlobals(0xc0001623c0)
/home/anna/Documents/GitProjects/nspcc-dev/neo-go/pkg/compiler/analysis.go:82 +0x22c
github.com/nspcc-dev/neo-go/pkg/compiler.(*codegen).compile(0xc0001623c0, 0xc000274d20, 0x1)
/home/anna/Documents/GitProjects/nspcc-dev/neo-go/pkg/compiler/codegen.go:2118 +0x17c
github.com/nspcc-dev/neo-go/pkg/compiler.codeGen(0xc000274d20)
/home/anna/Documents/GitProjects/nspcc-dev/neo-go/pkg/compiler/codegen.go:2191 +0x353
github.com/nspcc-dev/neo-go/pkg/compiler.CompileWithOptions({0xa6f39a, 0xc00023cee0}, {0xc6d240, 0xc00024a460}, 0x0)
/home/anna/Documents/GitProjects/nspcc-dev/neo-go/pkg/compiler/compiler.go:218 +0x65
github.com/nspcc-dev/neo-go/pkg/compiler_test.vmAndCompileInterop(0x5648df, {0xa9989f, 0x7d})
/home/anna/Documents/GitProjects/nspcc-dev/neo-go/pkg/compiler/vm_test.go:75 +0x113
github.com/nspcc-dev/neo-go/pkg/compiler_test.eval(0xc00024a440, {0xa9989f, 0x129f366e}, {0xa68880, 0xc00024a440})
/home/anna/Documents/GitProjects/nspcc-dev/neo-go/pkg/compiler/vm_test.go:36 +0x2d
github.com/nspcc-dev/neo-go/pkg/compiler_test.TestGenDeclWithMultiRet.func2(0x4079f9)
/home/anna/Documents/GitProjects/nspcc-dev/neo-go/pkg/compiler/global_test.go:36 +0x4f
testing.tRunner(0xc00022e9c0, 0xbce760)
/usr/local/go/src/testing/testing.go:1259 +0x102
created by testing.(*T).Run
/usr/local/go/src/testing/testing.go:1306 +0x35a
```
Solution:
Allow using multi-return function calls as general variable declaration
value. It was supported for assignment statements, so do the same for
*ast.GenDecl if it's a variable under the hood.
|
||
|---|---|---|
| .. | ||
| testdata | ||
| analysis.go | ||
| assign_test.go | ||
| binary_expr_test.go | ||
| byte_conversion_test.go | ||
| codegen.go | ||
| codegen_test.go | ||
| compiler.go | ||
| compiler_test.go | ||
| constant_test.go | ||
| convert_test.go | ||
| debug.go | ||
| debug_test.go | ||
| defer_test.go | ||
| doc.go | ||
| for_test.go | ||
| func_scope.go | ||
| function_call_test.go | ||
| global_test.go | ||
| if_test.go | ||
| import_test.go | ||
| init_test.go | ||
| inline.go | ||
| inline_test.go | ||
| interop_test.go | ||
| jumps_test.go | ||
| lambda_test.go | ||
| limit_test.go | ||
| map_test.go | ||
| native_test.go | ||
| nilcheck_test.go | ||
| numeric_test.go | ||
| panic_test.go | ||
| pointer_test.go | ||
| return_test.go | ||
| slice_test.go | ||
| struct_test.go | ||
| switch_test.go | ||
| syscall_test.go | ||
| type_test.go | ||
| types.go | ||
| vardecl_test.go | ||
| vars.go | ||
| verify_test.go | ||
| vm_test.go | ||