fatal error: stack overflow in case of incorrect recursive request

[gstarikov]

Hi. have found endless recursion in case of incorrect graphql request. is there a way to prohibit that?

request:

query Streams {
  Streams {
    ...StreamFragment
  }
}

fragment StreamFragment on Stream {
  ID
  Streams {
    ...StreamFragment
    Streams {
      ...StreamFragment
      Streams {
        ...StreamFragment
      }
    }
  }
}

schema:

type Stream 
    ID: ID!
    Streams:          [Stream]
}

stack trace

runtime: goroutine stack exceeds 1000000000-byte limit
runtime: sp=0xc033200400 stack=[0xc033200000, 0xc053200000]
fatal error: stack overflow
runtime stack:
runtime.throw({0xddc55b, 0x147ad20})
        /usr/local/go/src/runtime/panic.go:1198 +0x71
runtime.newstack()
        /usr/local/go/src/runtime/stack.go:1088 +0x5ac
runtime.morestack()
        /usr/local/go/src/runtime/asm_amd64.s:461 +0x8b
goroutine 8 [running]:
runtime.heapBitsSetType(0xc05358ee50, 0x10, 0x10, 0xcb1b20)
        /usr/local/go/src/runtime/mbitmap.go:822 +0xbcc fp=0xc033200410 sp=0xc033200408 pc=0x415a0c
runtime.mallocgc(0x10, 0xcb1b20, 0x1)
        /usr/local/go/src/runtime/malloc.go:1100 +0x65e fp=0xc033200490 sp=0xc033200410 pc=0x40ccbe
runtime.growslice(0xcb1b20, {0x0, 0xc000020bc9, 0x2}, 0x30)
        /usr/local/go/src/runtime/slice.go:267 +0x4ea fp=0xc0332004f8 sp=0xc033200490 pc=0x44b1aa
github.com/vektah/gqlparser/v2/validator/rules.(*sequentialFieldsMap).Push(...)
        /go/pkg/mod/github.com/vektah/gqlparser/v2@v2.1.0/validator/rules/overlapping_fields_can_be_merged.go:160
github.com/vektah/gqlparser/v2/validator/rules.getFieldsAndFragmentNames.func1({0xc00038adc0, 0x3, 0xd51740})
        /go/pkg/mod/github.com/vektah/gqlparser/v2@v2.1.0/validator/rules/overlapping_fields_can_be_merged.go:544 +0x165 fp=0xc0332005b0 sp=0xc0332004f8 pc=0xbbd5c5
github.com/vektah/gqlparser/v2/validator/rules.getFieldsAndFragmentNames({0xc00038adc0, 0x3, 0x4})
        /go/pkg/mod/github.com/vektah/gqlparser/v2@v2.1.0/validator/rules/overlapping_fields_can_be_merged.go:554 +0xea fp=0xc033200620 sp=0xc0332005b0 pc=0xbbd40a
github.com/vektah/gqlparser/v2/validator/rules.(*overlappingFieldsCanBeMergedManager).collectConflictsBetweenFieldsAndFragment(0xc0001ab038, 0xc05a8d8678, 0x2, 0x100000000000000, 0xc00038ac>
        /go/pkg/mod/github.com/vektah/gqlparser/v2@v2.1.0/validator/rules/overlapping_fields_can_be_merged.go:282 +0xaa fp=0xc033200698 sp=0xc033200620 pc=0xbbbd2a
github.com/vektah/gqlparser/v2/validator/rules.(*overlappingFieldsCanBeMergedManager).findConflictsBetweenSubSelectionSets(0xc0001ab038, 0x0, {0xc000386c60, 0x1, 0x1}, {0xc00006a220, 0x2, 0>
        /go/pkg/mod/github.com/vektah/gqlparser/v2@v2.1.0/validator/rules/overlapping_fields_can_be_merged.go:360 +0x125 fp=0xc033200738 sp=0xc033200698 pc=0xbbc2c5
github.com/vektah/gqlparser/v2/validator/rules.(*overlappingFieldsCanBeMergedManager).findConflict(0xc0001ab038, 0xfe, 0xc000205e80, 0xc000205e00)
        /go/pkg/mod/github.com/vektah/gqlparser/v2@v2.1.0/validator/rules/overlapping_fields_can_be_merged.go:465 +0x4b5 fp=0xc0332007e8 sp=0xc033200738 pc=0xbbce15
github.com/vektah/gqlparser/v2/validator/rules.(*overlappingFieldsCanBeMergedManager).collectConflictsBetween(0xc00006a260, 0xc05a8d8660, 0x2, 0x10000000048a9ba, 0xc026dcdb80)
        /go/pkg/mod/github.com/vektah/gqlparser/v2@v2.1.0/validator/rules/overlapping_fields_can_be_merged.go:407 +0x179 fp=0xc0332008a8 sp=0xc0332007e8 pc=0xbbc879
github.com/vektah/gqlparser/v2/validator/rules.(*overlappingFieldsCanBeMergedManager).findConflictsBetweenSubSelectionSets(0xc0001ab038, 0x0, {0xc00006a220, 0x2, 0x2}, {0xc00006a260, 0x2, 0>
        /go/pkg/mod/github.com/vektah/gqlparser/v2@v2.1.0/validator/rules/overlapping_fields_can_be_merged.go:354 +0xfd fp=0xc033200948 sp=0xc0332008a8 pc=0xbbc29d
github.com/vektah/gqlparser/v2/validator/rules.(*overlappingFieldsCanBeMergedManager).findConflict(0xc0001ab038, 0x0, 0xc000205e00, 0xc000205d80)
        /go/pkg/mod/github.com/vektah/gqlparser/v2@v2.1.0/validator/rules/overlapping_fields_can_be_merged.go:465 +0x4b5 fp=0xc0332009f8 sp=0xc033200948 pc=0xbbce15
github.com/vektah/gqlparser/v2/validator/rules.(*overlappingFieldsCanBeMergedManager).collectConflictsBetween(0xd1d720, 0xc05a8d8648, 0x20, 0xc026dcdac0, 0xc026dcdac0)
        /go/pkg/mod/github.com/vektah/gqlparser/v2@v2.1.0/validator/rules/overlapping_fields_can_be_merged.go:407 +0x179 fp=0xc033200ab8 sp=0xc0332009f8 pc=0xbbc879
github.com/vektah/gqlparser/v2/validator/rules.(*overlappingFieldsCanBeMergedManager).collectConflictsBetweenFieldsAndFragment(0xc0001ab038, 0xc05a8d8648, 0x2, 0x10000000048a9ba, 0xc00038ad>
        /go/pkg/mod/github.com/vektah/gqlparser/v2@v2.1.0/validator/rules/overlapping_fields_can_be_merged.go:291 +0xf2 fp=0xc033200b30 sp=0xc033200ab8 pc=0xbbbd72
github.com/vektah/gqlparser/v2/validator/rules.(*overlappingFieldsCanBeMergedManager).findConflictsBetweenSubSelectionSets(0xc0001ab038, 0x0, {0xc000386c60, 0x1, 0x1}, {0xc00006a260, 0x2, 0>
        /go/pkg/mod/github.com/vektah/gqlparser/v2@v2.1.0/validator/rules/overlapping_fields_can_be_merged.go:367 +0x197 fp=0xc033200bd0 sp=0xc033200b30 pc=0xbbc337
github.com/vektah/gqlparser/v2/validator/rules.(*overlappingFieldsCanBeMergedManager).findConflict(0xc0001ab038, 0x0, 0xc000205e80, 0xc000205d80)
        /go/pkg/mod/github.com/vektah/gqlparser/v2@v2.1.0/validator/rules/overlapping_fields_can_be_merged.go:465 +0x4b5 fp=0xc033200c80 sp=0xc033200bd0 pc=0xbbce15
github.com/vektah/gqlparser/v2/validator/rules.(*overlappingFieldsCanBeMergedManager).collectConflictsBetween(0xd1d720, 0xc05a8d8630, 0x20, 0xc026dcd9a0, 0xc026dcd9a0)
        /go/pkg/mod/github.com/vektah/gqlparser/v2@v2.1.0/validator/rules/overlapping_fields_can_be_merged.go:407 +0x179 fp=0xc033200d40 sp=0xc033200c80 pc=0xbbc879
github.com/vektah/gqlparser/v2/validator/rules.(*overlappingFieldsCanBeMergedManager).collectConflictsBetweenFieldsAndFragment(0xc0001ab038, 0xc05a8d8630, 0x2, 0x100000000000000, 0xc00038ad>
        /go/pkg/mod/github.com/vektah/gqlparser/v2@v2.1.0/validator/rules/overlapping_fields_can_be_merged.go:291 +0xf2 fp=0xc033200db8 sp=0xc033200d40 pc=0xbbbd72
github.com/vektah/gqlparser/v2/validator/rules.(*overlappingFieldsCanBeMergedManager).findConflictsBetweenSubSelectionSets(0xc0001ab038, 0x0, {0xc000386c60, 0x1, 0x1}, {0xc00006a220, 0x2, 0>
        /go/pkg/mod/github.com/vektah/gqlparser/v2@v2.1.0/validator/rules/overlapping_fields_can_be_merged.go:367 +0x197 fp=0xc033200e58 sp=0xc033200db8 pc=0xbbc337
github.com/vektah/gqlparser/v2/validator/rules.(*overlappingFieldsCanBeMergedManager).findConflict(0xc0001ab038, 0xfe, 0xc000205e80, 0xc000205e00)
        /go/pkg/mod/github.com/vektah/gqlparser/v2@v2.1.0/validator/rules/overlapping_fields_can_be_merged.go:465 +0x4b5 fp=0xc033200f08 sp=0xc033200e58 pc=0xbbce15