Reduce/Reduce conflict errors

[Jeffrey Walton]

Hi Everyone,

I'm building GnuTLS 3.5.15 from sources, including its dependencies.
One of them is libguile, and I am using version 2.2.2 from
ftp.gnu.org. I'm working on Ubuntu 17, x86_64.

The GnuTLS self tests are failing. As a first step I looked through
the build logs and found the issues below.

According to the Bison manual, "A reduce/reduce conflict occurs if
there are two or more rules that apply to the same sequence of input.
This usually indicates a serious error in the grammar."
(https://www.gnu.org/software/bison/manual/html_node/Reduce_002fReduce.html).

My question is, is this something that I should be concerned about?
Here, I'm only concerned about running GnuTLS self tests; not about Go
because I don't use Go.

My second question is, if this needs to be addressed, which version of
libguile does not experience the issue?

Thanks in advance,

Jeff

****************************************

  GUILEC language/cps/with-cps.go
wrote `language/cps/verify.go'
  GUILEC language/ecmascript/tokenize.go
wrote `language/cps/slot-allocation.go'
  GUILEC language/ecmascript/parse.go
wrote `language/cps/with-cps.go'
  GUILEC language/ecmascript/impl.go
%% Reduce/Reduce conflict (reduce 11, reduce 7) on '--' in state 422
%% Reduce/Reduce conflict (reduce 11, reduce 7) on '++' in state 422
%% Reduce/Reduce conflict (reduce 11, reduce 7) on '-' in state 422
%% Reduce/Reduce conflict (reduce 11, reduce 7) on '+' in state 422
%% Reduce/Reduce conflict (reduce 11, reduce 7) on 'semicolon' in state 422
%% Reduce/Reduce conflict (reduce 11, reduce 7) on 'dot' in state 422
%% Reduce/Reduce conflict (reduce 11, reduce 7) on 'lbracket' in state 422
%% Reduce/Reduce conflict (reduce 11, reduce 7) on 'lparen' in state 422
%% Reduce/Reduce conflict (reduce 9, reduce 6) on '--' in state 397
%% Reduce/Reduce conflict (reduce 9, reduce 6) on '++' in state 397
%% Reduce/Reduce conflict (reduce 9, reduce 6) on '-' in state 397
%% Reduce/Reduce conflict (reduce 9, reduce 6) on '+' in state 397
%% Reduce/Reduce conflict (reduce 9, reduce 6) on 'semicolon' in state 397
%% Reduce/Reduce conflict (reduce 9, reduce 6) on 'dot' in state 397
%% Reduce/Reduce conflict (reduce 9, reduce 6) on 'lbracket' in state 397
%% Reduce/Reduce conflict (reduce 9, reduce 6) on 'lparen' in state 397
%% Shift/Reduce conflict (shift 367, reduce 49) on 'else' in state 319
%% Shift/Reduce conflict (shift 144, reduce 177) on 'in' in state 242
%% Shift/Reduce conflict (shift 144, reduce 178) on 'in' in state 241
%% Shift/Reduce conflict (shift 144, reduce 179) on 'in' in state 240
%% Shift/Reduce conflict (shift 144, reduce 180) on 'in' in state 239
%% Shift/Reduce conflict (shift 80, reduce 119) on 'colon' in state 125
%% Shift/Reduce conflict (shift 170, reduce 139) on '++' in state 85
%% Shift/Reduce conflict (shift 169, reduce 139) on '--' in state 85
%% Shift/Reduce conflict (shift 153, reduce 159) on '+' in state 49
%% Shift/Reduce conflict (shift 152, reduce 159) on '-' in state 49
%% Shift/Reduce conflict (shift 144, reduce 176) on 'in' in state 47
wrote `language/ecmascript/tokenize.go'
  GUILEC language/ecmascript/base.go
language/ecmascript/base.scm:229:22: warning: possibly unbound
variable `Boolean'
language/ecmascript/base.scm:230:21: warning: possibly unbound variable `String'
language/ecmascript/base.scm:231:21: warning: possibly unbound variable `Number'
wrote `language/ecmascript/impl.go'
  GUILEC language/ecmascript/function.go
language/ecmascript/function.scm:40:9: warning: possibly unbound
variable `<js-array-object>'
language/ecmascript/function.scm:44:43: warning: possibly unbound
variable `js-array-vector'
wrote `language/ecmascript/function.go'
  GUILEC language/ecmascript/array.go
wrote `language/ecmascript/base.go'
  GUILEC language/ecmascript/compile-tree-il.go
wrote `language/ecmascript/array.go'
  GUILEC language/ecmascript/spec.go
%% Reduce/Reduce conflict (reduce 11, reduce 7) on '--' in state 422
%% Reduce/Reduce conflict (reduce 11, reduce 7) on '++' in state 422
%% Reduce/Reduce conflict (reduce 11, reduce 7) on '-' in state 422
%% Reduce/Reduce conflict (reduce 11, reduce 7) on '+' in state 422
%% Reduce/Reduce conflict (reduce 11, reduce 7) on 'semicolon' in state 422
%% Reduce/Reduce conflict (reduce 11, reduce 7) on 'dot' in state 422
%% Reduce/Reduce conflict (reduce 11, reduce 7) on 'lbracket' in state 422
%% Reduce/Reduce conflict (reduce 11, reduce 7) on 'lparen' in state 422
%% Reduce/Reduce conflict (reduce 9, reduce 6) on '--' in state 397
%% Reduce/Reduce conflict (reduce 9, reduce 6) on '++' in state 397
%% Reduce/Reduce conflict (reduce 9, reduce 6) on '-' in state 397
%% Reduce/Reduce conflict (reduce 9, reduce 6) on '+' in state 397
%% Reduce/Reduce conflict (reduce 9, reduce 6) on 'semicolon' in state 397
%% Reduce/Reduce conflict (reduce 9, reduce 6) on 'dot' in state 397
%% Reduce/Reduce conflict (reduce 9, reduce 6) on 'lbracket' in state 397
%% Reduce/Reduce conflict (reduce 9, reduce 6) on 'lparen' in state 397
%% Shift/Reduce conflict (shift 367, reduce 49) on 'else' in state 319
%% Shift/Reduce conflict (shift 144, reduce 177) on 'in' in state 242
%% Shift/Reduce conflict (shift 144, reduce 178) on 'in' in state 241
%% Shift/Reduce conflict (shift 144, reduce 179) on 'in' in state 240
%% Shift/Reduce conflict (shift 144, reduce 180) on 'in' in state 239
%% Shift/Reduce conflict (shift 80, reduce 119) on 'colon' in state 125
%% Shift/Reduce conflict (shift 170, reduce 139) on '++' in state 85
%% Shift/Reduce conflict (shift 169, reduce 139) on '--' in state 85
%% Shift/Reduce conflict (shift 153, reduce 159) on '+' in state 49
%% Shift/Reduce conflict (shift 152, reduce 159) on '-' in state 49
%% Shift/Reduce conflict (shift 144, reduce 176) on 'in' in state 47
wrote `language/ecmascript/spec.go'
  GUILEC language/elisp/falias.go
wrote `language/elisp/falias.go'
  GUILEC language/elisp/lexer.go