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x/tools/go/types: panics on invalid constant #11325

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x/tools/go/types: panics on invalid constant#11325
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Go1.5
@dvyukov

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@dvyukov
dvyukov
opened on Jun 22, 2015

The following program crashes with the panic:

package main

import (
    "go/ast"
    "go/parser"
    "go/token"

    _ "golang.org/x/tools/go/gcimporter"
    "golang.org/x/tools/go/types"
)

func main() {
    data := []byte(`
package a
var v = 0>>1.1
`)
    fset := token.NewFileSet()
    f, err := parser.ParseFile(fset, "src.go", data, parser.ParseComments|parser.DeclarationErrors|parser.AllErrors)
    if err != nil {
        return
    }
    _, err = types.Check("pkg", fset, []*ast.File{f})
    if err != nil {
        return
    }
}
panic: 11/10 not an Int

goroutine 1 [running]:
golang.org/x/tools/go/types.(*Checker).handleBailout(0x4c20803c270, 0x4c20802de60)
    src/golang.org/x/tools/go/types/check.go:218 +0xfc
golang.org/x/tools/go/exact.Uint64Val(0x7f4fb20bf128, 0x4c208032ac0, 0x7f4fb20beae8, 0x76e4c0)
    src/golang.org/x/tools/go/exact/exact.go:245 +0x2ef
golang.org/x/tools/go/types.(*Checker).shift(0x4c20803c270, 0x4c208032a40, 0x4c208032a80, 0x15)
    src/golang.org/x/tools/go/types/expr.go:651 +0x186
golang.org/x/tools/go/types.(*Checker).binary(0x4c20803c270, 0x4c208032a40, 0x7f4fb20beef8, 0x4c20801e320, 0x7f4fb20beef8, 0x4c20801e340, 0x15)
    src/golang.org/x/tools/go/types/expr.go:735 +0x14d
golang.org/x/tools/go/types.(*Checker).exprInternal(0x4c20803c270, 0x4c208032a40, 0x7f4fb20bef30, 0x4c20803aa20, 0x0, 0x0, 0x40a100)
    src/golang.org/x/tools/go/types/expr.go:1382 +0x31b6
golang.org/x/tools/go/types.(*Checker).rawExpr(0x4c20803c270, 0x4c208032a40, 0x7f4fb20bef30, 0x4c20803aa20, 0x0, 0x0, 0x0)
    src/golang.org/x/tools/go/types/expr.go:908 +0x80
golang.org/x/tools/go/types.(*Checker).expr(0x4c20803c270, 0x4c208032a40, 0x7f4fb20bef30, 0x4c20803aa20)
    src/golang.org/x/tools/go/types/expr.go:1436 +0x6e
golang.org/x/tools/go/types.(*Checker).varDecl(0x4c20803c270, 0x4c208036af0, 0x4c2080340a0, 0x1, 0x1, 0x0, 0x0, 0x7f4fb20bef30, 0x4c20803aa20)
    src/golang.org/x/tools/go/types/decl.go:158 +0x38e
golang.org/x/tools/go/types.(*Checker).objDecl(0x4c20803c270, 0x7f4fb20bf040, 0x4c208036af0, 0x0, 0x4c20802dd88, 0x0, 0x8)
    src/golang.org/x/tools/go/types/decl.go:81 +0x441
golang.org/x/tools/go/types.(*Checker).packageObjects(0x4c20803c270, 0x4c20800a690, 0x1, 0x1)
    src/golang.org/x/tools/go/types/resolver.go:393 +0x1ff
golang.org/x/tools/go/types.(*Checker).Files(0x4c20803c270, 0x4c20802df30, 0x1, 0x1, 0x0, 0x0)
    src/golang.org/x/tools/go/types/check.go:230 +0x103
golang.org/x/tools/go/types.(*Config).Check(0x4c208032940, 0x6550f0, 0x3, 0x4c208032840, 0x4c20802df30, 0x1, 0x1, 0x0, 0x4c20805ef10, 0x0, ...)
    src/golang.org/x/tools/go/types/api.go:340 +0xbb
golang.org/x/tools/go/types.Check(0x6550f0, 0x3, 0x4c208032840, 0x4c20802df30, 0x1, 0x1, 0x4c208070300, 0x0, 0x0)
    src/golang.org/x/tools/go/types/api.go:42 +0x9b
main.main()
    gotypes.go:22 +0x1e0

Should return an error instead.

on commit af81789

Activity

dvyukov
assigned
griesemer
on Jun 22, 2015
griesemer
added this to the Go1.5 milestone on Jun 22, 2015
griesemer
closed this as completedin e9a746don Jun 22, 2015
dvyukov

dvyukov commented on Jun 23, 2015

@dvyukov
dvyukov
on Jun 23, 2015
MemberAuthor

FTR, this also fixed the following gotype crash:

package a
var e,f=f>0>(nil)>>0
panic: runtime error: invalid memory address or nil pointer dereference [recovered]
    panic: runtime error: invalid memory address or nil pointer dereference [recovered]
    panic: runtime error: invalid memory address or nil pointer dereference
[signal 0xb code=0x1 addr=0x20 pc=0x4fe5a3]

goroutine 1 [running]:
main.checkPkgFiles.func2()
    src/golang.org/x/tools/cmd/gotype/gotype.go:212 +0x92
golang.org/x/tools/go/types.(*Checker).handleBailout(0xc8201021c0, 0xc820113d68)
    src/golang.org/x/tools/go/types/check.go:219 +0xd8
golang.org/x/tools/go/types.representableConst(0x0, 0x0, 0x0, 0x14, 0x0, 0x400)
    src/golang.org/x/tools/go/types/expr.go:187 +0x33
golang.org/x/tools/go/types.(*Checker).shift(0xc8201021c0, 0xc820010940, 0xc8200109c0, 0x15)
    src/golang.org/x/tools/go/types/expr.go:623 +0xeb
golang.org/x/tools/go/types.(*Checker).binary(0xc8201021c0, 0xc820010940, 0x7f3d97ef4918, 0xc82000aaa0, 0x7f3d97ef48a8, 0xc82000aac0, 0x15)
    src/golang.org/x/tools/go/types/expr.go:735 +0x136
golang.org/x/tools/go/types.(*Checker).exprInternal(0xc8201021c0, 0xc820010940, 0x7f3d97ef48e0, 0xc820016c00, 0x0, 0x0, 0x0)
    src/golang.org/x/tools/go/types/expr.go:1382 +0x2ef9
golang.org/x/tools/go/types.(*Checker).rawExpr(0xc8201021c0, 0xc820010940, 0x7f3d97ef48e0, 0xc820016c00, 0x0, 0x0, 0x0)
    src/golang.org/x/tools/go/types/expr.go:908 +0x7d
golang.org/x/tools/go/types.(*Checker).expr(0xc8201021c0, 0xc820010940, 0x7f3d97ef48e0, 0xc820016c00)
    src/golang.org/x/tools/go/types/expr.go:1436 +0x63
golang.org/x/tools/go/types.(*Checker).binary(0xc8201021c0, 0xc820010900, 0x7f3d97ef48e0, 0xc820016bd0, 0x7f3d97ef48e0, 0xc820016c00, 0x29)
    src/golang.org/x/tools/go/types/expr.go:723 +0xa6
golang.org/x/tools/go/types.(*Checker).exprInternal(0xc8201021c0, 0xc820010900, 0x7f3d97ef48e0, 0xc820016c30, 0x0, 0x0, 0x0)
    src/golang.org/x/tools/go/types/expr.go:1382 +0x2ef9
golang.org/x/tools/go/types.(*Checker).rawExpr(0xc8201021c0, 0xc820010900, 0x7f3d97ef48e0, 0xc820016c30, 0x0, 0x0, 0x0)
    src/golang.org/x/tools/go/types/expr.go:908 +0x7d
golang.org/x/tools/go/types.(*Checker).expr(0xc8201021c0, 0xc820010900, 0x7f3d97ef48e0, 0xc820016c30)
    src/golang.org/x/tools/go/types/expr.go:1436 +0x63
golang.org/x/tools/go/types.(*Checker).initVars.func1(0xc820010900, 0x0)
    src/golang.org/x/tools/go/types/assignments.go:208 +0x72
golang.org/x/tools/go/types.unpack(0xc8201111c8, 0x1, 0x1, 0x0, 0x0, 0x0)
    src/golang.org/x/tools/go/types/call.go:139 +0x60
golang.org/x/tools/go/types.(*Checker).initVars(0xc8201021c0, 0xc82000e9e0, 0x2, 0x2, 0xc82000ea10, 0x1, 0x1, 0x0)
    src/golang.org/x/tools/go/types/assignments.go:208 +0xcb
golang.org/x/tools/go/types.(*Checker).varDecl(0xc8201021c0, 0xc820015bd0, 0xc82000e9e0, 0x2, 0x2, 0x0, 0x0, 0x7f3d97ef48e0, 0xc820016c30)
    src/golang.org/x/tools/go/types/decl.go:177 +0x2df
golang.org/x/tools/go/types.(*Checker).objDecl(0xc8201021c0, 0x7f3d97ef4a28, 0xc820015bd0, 0x0, 0x0, 0x0, 0x0)
    src/golang.org/x/tools/go/types/decl.go:82 +0x483
golang.org/x/tools/go/types.(*Checker).ident(0xc8201021c0, 0xc820010840, 0xc82000aa20, 0x0, 0x0, 0x0, 0x0)
    src/golang.org/x/tools/go/types/typexpr.go:37 +0x3a6
golang.org/x/tools/go/types.(*Checker).exprInternal(0xc8201021c0, 0xc820010840, 0x7f3d97ef4870, 0xc82000aa20, 0x0, 0x0, 0x7e)
    src/golang.org/x/tools/go/types/expr.go:952 +0x182
golang.org/x/tools/go/types.(*Checker).rawExpr(0xc8201021c0, 0xc820010840, 0x7f3d97ef4870, 0xc82000aa20, 0x0, 0x0, 0x0)
    src/golang.org/x/tools/go/types/expr.go:908 +0x7d
golang.org/x/tools/go/types.(*Checker).expr(0xc8201021c0, 0xc820010840, 0x7f3d97ef4870, 0xc82000aa20)
    src/golang.org/x/tools/go/types/expr.go:1436 +0x63
golang.org/x/tools/go/types.(*Checker).binary(0xc8201021c0, 0xc820010840, 0x7f3d97ef4870, 0xc82000aa20, 0x7f3d97ef48a8, 0xc82000aa40, 0x29)
    src/golang.org/x/tools/go/types/expr.go:722 +0x71
golang.org/x/tools/go/types.(*Checker).exprInternal(0xc8201021c0, 0xc820010840, 0x7f3d97ef48e0, 0xc820016bd0, 0x0, 0x0, 0x7e)
    src/golang.org/x/tools/go/types/expr.go:1382 +0x2ef9
golang.org/x/tools/go/types.(*Checker).rawExpr(0xc8201021c0, 0xc820010840, 0x7f3d97ef48e0, 0xc820016bd0, 0x0, 0x0, 0x0)
    src/golang.org/x/tools/go/types/expr.go:908 +0x7d
golang.org/x/tools/go/types.(*Checker).expr(0xc8201021c0, 0xc820010840, 0x7f3d97ef48e0, 0xc820016bd0)
    src/golang.org/x/tools/go/types/expr.go:1436 +0x63
golang.org/x/tools/go/types.(*Checker).binary(0xc8201021c0, 0xc820010840, 0x7f3d97ef48e0, 0xc820016bd0, 0x7f3d97ef48e0, 0xc820016c00, 0x29)
    src/golang.org/x/tools/go/types/expr.go:722 +0x71
golang.org/x/tools/go/types.(*Checker).exprInternal(0xc8201021c0, 0xc820010840, 0x7f3d97ef48e0, 0xc820016c30, 0x0, 0x0, 0xc82006c090)
    src/golang.org/x/tools/go/types/expr.go:1382 +0x2ef9
golang.org/x/tools/go/types.(*Checker).rawExpr(0xc8201021c0, 0xc820010840, 0x7f3d97ef48e0, 0xc820016c30, 0x0, 0x0, 0x0)
    src/golang.org/x/tools/go/types/expr.go:908 +0x7d
golang.org/x/tools/go/types.(*Checker).expr(0xc8201021c0, 0xc820010840, 0x7f3d97ef48e0, 0xc820016c30)
    src/golang.org/x/tools/go/types/expr.go:1436 +0x63
golang.org/x/tools/go/types.(*Checker).initVars.func1(0xc820010840, 0x0)
    src/golang.org/x/tools/go/types/assignments.go:208 +0x72
golang.org/x/tools/go/types.unpack(0xc820113a10, 0x1, 0xffffffffffff01, 0x7ac2e0, 0x0, 0xc81ffffaa5)
    src/golang.org/x/tools/go/types/call.go:139 +0x60
golang.org/x/tools/go/types.(*Checker).initVars(0xc8201021c0, 0xc82000e9e0, 0x2, 0x2, 0xc82000ea00, 0x1, 0x1, 0x0)
    src/golang.org/x/tools/go/types/assignments.go:208 +0xcb
golang.org/x/tools/go/types.(*Checker).varDecl(0xc8201021c0, 0xc820015b80, 0xc82000e9e0, 0x2, 0x2, 0x0, 0x0, 0x7f3d97ef48e0, 0xc820016c30)
    src/golang.org/x/tools/go/types/decl.go:177 +0x2df
golang.org/x/tools/go/types.(*Checker).objDecl(0xc8201021c0, 0x7f3d97ef4a28, 0xc820015b80, 0x0, 0xc820113c90, 0x0, 0x8)
    src/golang.org/x/tools/go/types/decl.go:82 +0x483
golang.org/x/tools/go/types.(*Checker).packageObjects(0xc8201021c0, 0xc82000ab40, 0x2, 0x2)
    src/golang.org/x/tools/go/types/resolver.go:400 +0x22a
golang.org/x/tools/go/types.(*Checker).Files(0xc8201021c0, 0xc82006c060, 0x1, 0x1, 0x0, 0x0)
    src/golang.org/x/tools/go/types/check.go:231 +0xfc
golang.org/x/tools/go/types.(*Config).Check(0xc820010800, 0x71ed30, 0x3, 0xc820010780, 0xc82006c060, 0x1, 0x1, 0x0, 0x1, 0x0, ...)
    src/golang.org/x/tools/go/types/api.go:340 +0x248
main.checkPkgFiles(0xc82006c060, 0x1, 0x1)
    src/golang.org/x/tools/cmd/gotype/gotype.go:217 +0x204
main.main()
    src/golang.org/x/tools/cmd/gotype/gotype.go:254 +0x1d9

now it prints:

/tmp/222.go:2:13: invalid operation: shifted operand (nil) (untyped nil value) must be integer
/tmp/222.go:2:13: invalid operation: shifted operand (nil) (untyped nil value) must be integer
/tmp/222.go:2:7: initialization cycle for f
/tmp/222.go:2:7:    f refers to
/tmp/222.go:2:7:    f
griesemer
added a commit that references this issue on Jun 23, 2015

go/types: add missing test for constant shifts

ef4a17b
golang
locked and limited conversation to collaborators on Jun 25, 2016
gopherbot
added
FrozenDueToAge
on Jun 25, 2016
rsc
unassigned
griesemer
on Jun 23, 2022
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          x/tools/go/types: panics on invalid constant · Issue #11325 · golang/go