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Merge pull request #307 from xexyl/bugs

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Landon Curt Noll authored and GitHub committed 2023-04-07 23:44:44 -07:00
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@@ -117,19 +117,10 @@ experienced this many times with vim so he tends to disable all format options
when formatting code.
## STATUS: INABIAF - please **DO NOT** fix
### INABIAF: It's not a bug it's a feature :-)
Entries with this status should NOT be touched (unless they have another status
that suggests that issue can be changed): they are system specific by design
or are other things that are not actually bugs even if they appear to be but are
noteworthy nonetheless.
## STATUS: known bug - please help us fix
Entries with this status have one or more bugs that need to be fixed. Are you
able to fix it?
able to fix it? We welcome your help!
## STATUS: possible bug (possibly depending on system) - please help test and if necessary fix
@@ -173,26 +164,13 @@ like an int. He used other various techniques to get them to compile. In some
cases this introduced a problem but typically if not always that problem exists
with compilers that are less strict.
## STATUS: compiled executable crashes - please help us fix
While such entries can compile, the resulting executable sometimes or always
crashes.
## STATUS: requires a compiler supporting `-traditional-cpp` - alternate code requested
Entries with this status need a compiler that support `-traditional-cpp`. `gcc`
supports this but `clang` does not.
Please be advised that, as noted above, gcc under macOS is actually gcc even if it
looks like it's gcc (the programs are the same, they're not symlinks but both
are clang).
If you do wish to provide an alternate version of the program that does not need
compiler supporting you are welcome to summit such code via a
[GitHub pull request](https://github.com/ioccc-src/temp-test-ioccc/pulls) and we
will be happy to credit you in the entry's _README.md_ file.
NOTE: this does NOT apply to entries under the INABIAF status (though they're
not mutually exclusive in some cases).
## STATUS: uses gets() - change to fgets() if possible (in some cases getline() works)
@@ -221,6 +199,11 @@ will be in the Makefile and other times it will be obfuscated in other ways.
Compilers and linkers tend to warn about its use and this is a good way to find
entries that use it even if it's not visible in the code.
NOTE: this status is not necessarily mutually exclusive with the INABIAF (it's a
bug not a feature) status. The reason for this is due to warnings during linking
or runtime, sometimes causing confusing output.
## STATUS: missing file(s) - please provide them
In these entries one file or multiple files are missing from the repo. In some
@@ -228,11 +211,86 @@ cases these files can be found on the [IOCCC website](https://www.ioccc.org) but
in other cases they are entirely absent. In this case you'll probably have to
contact the author (unless you are the author! :-) ).
## STATUS: missing make rules - please provide them
In these entries one or more make rules noted by the author and/or judges is/are
missing. You might consider looking at the [archive](/archive) as a good place
to find them.
## STATUS: INABIAF - please **DO NOT** fix
### INABIAF: It's not a bug it's a feature :-)
Entries with this status should NOT be touched (unless they have another status
that suggests that issue can be changed): they are system specific by design
or are other things that are not actually bugs even if they appear to be. But
are noteworthy nonetheless.
NOTE: the definition of this status changed over time. At one point it was when
something was noted by the author, the judges, a consequence of earlier
requirements for winning entries or the purpose was to do something that might
appear to be buggy. An example of system specific entries:
[1984/mullender](1984/mullender/mullender.c) (see below and the [faq](/faq.md)
for a version that works in modern systems) is very system specific and was
before system specific winning entries were discouraged. This is an all time
personal favourite of Landon Curt Noll.
An example where a crash is not a bug: [2019/endoh](2019/endoh/endoh.c) is
supposed to crash. There are others that are also supposed to crash or that are
known to segfault but are considered features.
As of 07 April 2023 the definition changed where just because an entry segfaults
because of (for example) invalid input does not mean it's a bug that should be
fixed. [Cody Boone Ferguson](/winners.html#Cody_Boone_Ferguson) fixed some of the
entries but he felt this is tampering with the entries (that after all are not
meant to be maintainable or even good programming style!); thus the definition
of this status was changed and the 'fixes' were rolled back. There might be some
exceptions where the entry did not actually work or compile under some systems;
in this case depending on how complicated the fix is it might not have been
rolled back.
We challenge you to fix them for educational/instructional value and/or
enjoyment but we kindly request that you **DO NOT** submit a pull request! If
you can't figure it out you're invited to look at the git diffs if you wish.
NOTE: in the case of `gets()` we've fixed some to avoid the warning of the
compiler, linker or even during runtime, depending on the system. In [one
case](1990/tbr/tbr.c) the fix actually prevents confusing output (though that
was not the only fix made).
### Exception: your own entries
Of course if you're the author you're welcome to fix your own entry (or else
suggest that they're fixed)!
## STATUS: requires a compiler supporting `-traditional-cpp` - alternate code requested
### NOTE: all of these appear to be fixed
Entries with this status need a compiler that support `-traditional-cpp`. `gcc`
supports this but `clang` does not.
Please be advised that, as noted above, gcc under macOS is actually gcc even if it
looks like it's gcc (the programs are the same, they're not symlinks but both
are clang).
If you do wish to provide an alternate version of the program that does not need
compiler supporting you are welcome to summit such code via a
[GitHub pull request](https://github.com/ioccc-src/temp-test-ioccc/pulls) and we
will be happy to credit you in the entry's _README.md_ file.
NOTE: as of commit fa8a9b8b28a6b69a6b4efd74a45402f745e280b3 we believe that all
the entries with this problem have been fixed.
# List of entries by year, sorted in alphabetical order
# 1984
## [1984/laman](1984/laman/laman.c) ([README.md](1984/laman/README.md)
## STATUS: INABIAF - please **DO NOT** fix
This entry will segfault if there is no arg.
# 1985
@@ -244,7 +302,8 @@ contact the author (unless you are the author! :-) ).
not work under macOS. It prints `H????????` with additional `?`s printed as it
continues to run.
We have not had a chance to try and fix this yet.
We have not had a chance to try and fix this yet but you're welcome to have a go
at it.
# 1986
@@ -280,7 +339,7 @@ the correct output. Thus:
```c
[holloway.c:15:11: warning: incompatible pointer types initializing 'char *' with an expression of type 'char **'; dereference with * [-Wincompatible-pointer-types]
holloway.c:15:11: warning: incompatible pointer types initializing 'char *' with an expression of type 'char **'; dereference with * [-Wincompatible-pointer-types]
char *t = s;
^ ~
*
@@ -315,6 +374,7 @@ or any others.
# 1987
## [1987/lievaart](1987/lievaart/lievaart.c) ([README.md](1987/lievaart/README.md))
## STATUS: possible bug (possibly depending on system) - please help test and if necessary fix
This might not work right. When [Cody Boone
Ferguson](/winners.html#Cody_Boone_Ferguson) runs it he gets something like:
@@ -337,10 +397,9 @@ so maybe he's doing something wrong.
# 1989
## [1989/robison](1989/robison/robison.c) ([README.md](1989/robison/README.md))
## STATUS: known bug - please help us fix
## STATUS: INABIAF - please **DO NOT** fix
This might not be an issue that needs to be fixed but numbers with non-binary
digits will crash the program.
This program will crash with numbers with non-binary digits.
## [1989/westley](1989/westley/westley.c) ([README.md](1989/westley/README.md))
@@ -410,6 +469,19 @@ Should the entry use `perror()`? Perhaps not but we're not sure of its purpose
so it should stay with this note.
## [1990/theorem](1990/theorem/theorem.c) ([README.md](1990/theorem/README.md))
## STATUS: INABIAF - please **DO NOT** fix
[Cody Boone Ferguson](/winners.html#Cody_Boone_Ferguson) fixed some segfaults in
this entry that prevented it from working. However if not enough args are
specified this program will crash. This should NOT be fixed.
## STATUS: known bug - please help us fix
On the other hand the `fibonacci` program that is generated prints a string of
0s over and over again. Can you fix this? See the README.md for details on how
to generate it.
# 1991
@@ -426,6 +498,12 @@ this simply does not work with them. Can you help us?
# 1993
## [1993/plummber](1993/plummer/plummer.c) ([README.md](1993/plummer/README.md))
## STATUS: INABIAF - please **DO NOT** fix
If not enough args are specified this program will crash. This should NOT be
fixed.
# 1994
@@ -447,26 +525,27 @@ Cody will be looking at this later on.
## [1994/schnitzi](1994/schnitzi/schnitzi.c) ([README.md])(1994/schnitzi/README.md))
## STATUS: uses gets() - change to fgets() if possible
The original buffer size of this entry is 100 which is very easily overflowed
with `gets()` which it uses. [Cody Boone
Ferguson](/winners.html#Cody_Boone_Ferguson) changed the buffer size to 10000
but he notes a problem in that this does not translate to the generated source
file (when feeding the source itself). With `fgets()` it generates compiler
errors. Without special care with changing the buffer size it would also
generate compiler errors. Cody explains the magic below which might be used to
change this entry to fgets() (and he'll be working on it in the coming days most
likely).
The buffer size of this entry is 100 which is very easily overflowed
with `gets()` which it uses. Changing it to use `fgets()` is difficult. Even
changing the buffer size can cause compilation errors and even when that is
fixed it will not translate to the generated file. The buffer size was changed
but to make it the same functionality it was changed back.
[Cody Boone Ferguson](/winners.html#Cody_Boone_Ferguson) explains the magic of
how this entry works below which will be necessary if this entry is to be fixed,
below.
### The magic of [1994/schnitzi](1994/schnitzi/schnitzi.c) and how it flips text
Cody provided some tips in how the entry works so that it can hopefully be made
to use fgets() and also hopefully have the buffer size updated in the generated
code. He notes that this might be a real problem with formatting the code but
nevertheless he offers the below tips:
The problem is getting the generated code to use `fgets()` (once it even
compiles which is easy to do) and also have the updated buffer size be the same.
The generated output, when changed to `fgets()` failed to compile. The buffer
size, when using `gets()` is still the same.
Take a look at the interesting comment as well as the `int r=0,x,y=0` at the top
of the file. If you look at each column go down that column you can see how it
spells out the code! For instance the first column looks like:
The real problem is with formatting the code. Take a look at the interesting
comment as well as the `int r=0,x,y=0` at the top of the file. If you look at
each column go down that column you can see how it spells out the code! For
instance the first column looks like:
```
@@ -609,6 +688,15 @@ $ ./schnitzi 9|wc -l
771999
```
There are two segfaults that were initially fixed but the fixes were undone to
make the entry as close to possible as the original. These should not be fixed
either:
- if one does not specify an arg the program will crash.
- if the arg had any characters that were not digits 1 - 9 it will show invalid
output and then crash. If it starts with 0 it can work as long as another digit
follows it and there are no other non-digits.
# 1999
@@ -616,6 +704,21 @@ There was no IOCCC in 1999.
# 2000
[2000/primenum](2000/primenum/primenum.c) ([README.md](2000/primenum/README.md))
## STATUS: INABIAF - please **DO NOT** fix
This program does not do what you might think it does! Running it like:
```sh
./primenum 13
```
will seemingly wait for input exactly because it is waiting for input. See the
README.md file or look at the source.
It also has main() return void even though this is non-standard. Please do not
fix this (in fact it was originally done but rolled back).
# 2001
@@ -840,9 +943,9 @@ modern Macs as Apple has made it quite difficult to compile 32-bit applications
It's quite probable that non x86 related CPUs will also not work: it's hard to
know because Cody's only non-x86 (x86_64 in particular) system is the MacBook
Pro Max with the M1 chip which is arm64 and specifying `-m32` is invalid on that
system (might be on Intel 64-bit Macs as well but he hasn't had one since before
November 2022).
Pro Max with the M1 chip which is arm64 and unfortunately specifying `-m32` is
invalid on that system (might be on Intel 64-bit Macs as well but he hasn't had
one since before November 2022).
## [2005/mynx](2005/mynx/mynx.c) ([README.md](2005/mynx/README.md))
@@ -910,6 +1013,13 @@ for now.
# 2018
## [2018/algmyr](2018/algmyr/algmyr.c) ([README.md)(2018/algmyr/README.md]))
## STATUS: INABIAF - please **DO NOT** fix
This entry is known to crash if a file cannot be opened. This is noted by the
author and is easy enough to fix but need not be.
## [2018/hou](2018/hou/prog.c) ([README.md](2018/hou/README.md))
## STATUS: INABIAF - please **DO NOT** fix
@@ -948,6 +1058,12 @@ touched either.
# 2020
## [2020/burton](2020/burton/prog.c) ([README.md](2020/burton/README.md))
## STATUS: INABIAF - please **DO NOT** fix
This entry is known to crash if no arg is specified. Although easy to fix it is
documented and should not be fixed (of course you may fix it to see if you can
but it shouldn't be made into a pull request).
## [2020/ferguson1](2020/ferguson1/prog.c) ([README.md](2020/ferguson1/README.md))
## STATUS: INABIAF - please **DO NOT** fix