Go patch committed: accept numeric literals with leading zeroes

[Ian Lance Taylor]

This patch by Chris Manghane fixes the Go frontend to accept numeric
literals with leading zeroes, even if they don't turn out to be octal.
This fixes https://golang.org/issue/11532 and
https://golang.org/issue/11533 .  Bootstrapped and ran Go testsuite on
x86_64-unknown-linux-gnu.  Committed to mainline.

Ian

Index: gcc/go/gofrontend/MERGE
===================================================================
--- gcc/go/gofrontend/MERGE     (revision 227191)
+++ gcc/go/gofrontend/MERGE     (working copy)
@@ -1,4 +1,4 @@
-14ca4b6130b9a7132d132f418e9ea283b3a52c08
+f97d579fa8431af5cfde9b0a48604caabfd09377
 
 The first line of this file holds the git revision number of the last
 merge done from the gofrontend repository.
Index: gcc/go/gofrontend/lex.cc
===================================================================
--- gcc/go/gofrontend/lex.cc    (revision 226846)
+++ gcc/go/gofrontend/lex.cc    (working copy)
@@ -1047,7 +1047,7 @@ Lex::gather_number()
          pnum = p;
          while (p < pend)
            {
-             if (*p < '0' || *p > '7')
+             if (*p < '0' || *p > '9')
                break;
              ++p;
            }
@@ -1060,7 +1060,13 @@ Lex::gather_number()
          std::string s(pnum, p - pnum);
          mpz_t val;
          int r = mpz_init_set_str(val, s.c_str(), base);
-         go_assert(r == 0);
+          if (r != 0)
+            {
+              if (base == 8)
+                error_at(this->location(), "invalid octal literal");
+              else
+                error_at(this->location(), "invalid hex literal");
+            }
 
          if (neg)
            mpz_neg(val, val);