diff options
Diffstat (limited to 'contrib/perl5/t/op/repeat.t')
| -rwxr-xr-x | contrib/perl5/t/op/repeat.t | 17 |
1 files changed, 11 insertions, 6 deletions
diff --git a/contrib/perl5/t/op/repeat.t b/contrib/perl5/t/op/repeat.t index f935bf1..c030ba9 100755 --- a/contrib/perl5/t/op/repeat.t +++ b/contrib/perl5/t/op/repeat.t @@ -42,10 +42,15 @@ print join(':', (9,9) x 4) eq '9:9:9:9:9:9:9:9' ? "ok 18\n" : "not ok 18\n"; print join('', (split(//,"123")) x 2) eq '123123' ? "ok 19\n" : "not ok 19\n"; # -# The test #20 is actually testing for Digital C compiler optimizer bug. +# The test #20 is actually testing for Digital C compiler optimizer bug, +# present in Dec C versions 5.* and 6.0 (used in Digital UNIX and VMS), +# found in December 1998. The bug was reported to Digital^WCompaq as +# DECC 2745 (21-Dec-1998) +# GEM_BUGS 7619 (23-Dec-1998) +# As of April 1999 the bug has been fixed in Tru64 UNIX 5.0 and is planned +# to be fixed also in 4.0G. # -# Dec C versions 5.* and 6.0 (used in Digital UNIX and VMS) used -# to produce (as of December 1998) broken code for util.c:repeatcpy() +# The bug was as follows: broken code was produced for util.c:repeatcpy() # (a utility function for the 'x' operator) in the case *all* these # four conditions held: # @@ -68,9 +73,6 @@ print join('', (split(//,"123")) x 2) eq '123123' ? "ok 19\n" : "not ok 19\n"; # 24 .........???????.??????? # 25 .........???????.???????. # -# The bug could be (obscurely) avoided by changing "from" to -# be an unsigned char pointer. -# # The bug was triggered in the "if (len == 1)" branch. The fix # was to introduce a new temporary variable. In diff -u format: # @@ -85,6 +87,9 @@ print join('', (split(//,"123")) x 2) eq '123123' ? "ok 19\n" : "not ok 19\n"; # return; # } # +# The bug could also be (obscurely) avoided by changing "from" to +# be an unsigned char pointer. +# # This obscure bug was not found by the then test suite but instead # by Mark.Martinec@nsc.ijs.si while trying to install Digest-MD5-2.00. # |
