Bug#178386: marked as done (gcc-3.2: Warns wrong about unreachable code)
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and subject line Bug#178386: gcc-3.2: Warns wrong about unreachable code
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>From anthony@derobert.net Sat Jan 25 14:30:02 2003
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From: Anthony DeRobertis <asd@suespammers.org>
To: Debian Bug Tracking System <submit@bugs.debian.org>
Subject: gcc-3.2: Warns wrong about unreachable code
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Package: gcc-3.2
Version: 1:3.2.1-0pre3
Severity: normal
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
gcc-3.2 -Wall -pedantic -ansi -Werror -march=i486 -mcpu=i486 -Os \
-Wunreachable-code -g -o salt-generator salt-generator.c
cc1: warnings being treated as errors
salt-generator.c: In function `main':
salt-generator.c:47: warning: will never be executed
make: *** [salt-generator] Error 1
Line 47 is the "do {" line below. Lines around it are:
for (x = 0; x < SALT_SIZE; ++x) {
do {
errno = 0;
read_cnt = read(rand, &buf, 1);
} while (read_cnt == -1 && (errno == EINTR || errno == EAGAIN));
SALT_SIZE is 16.
Fully pre-processed source comming up as soon as I get the bug number to
mail it to.
anthony@bohr:salt-generator$ gcc-3.2 -v
Reading specs from /usr/lib/gcc-lib/i386-linux/3.2.1/specs
Configured with: /mnt/data/gcc-3.1/gcc-3.2-3.2.1ds2/src/configure -v --enable-languages=c,c++,java,f77,proto,objc,ada --prefix=/usr --mandir=/usr/share/man --infodir=/usr/share/info --with-gxx-include-dir=/usr/include/c++/3.2 --enable-shared --with-system-zlib --enable-nls --without-included-gettext --enable-java-gc=boehm --enable-objc-gc i386-linux
Thread model: posix
gcc version 3.2.1 20020924 (Debian prerelease)
- -- System Information
Debian Release: testing/unstable
Architecture: i386
Kernel: Linux bohr 2.4.16 #2 SMP Wed Nov 28 05:25:00 EST 2001 i686
Locale: LANG=en_US, LC_CTYPE=en_US
Versions of packages gcc-3.2 depends on:
ii binutils 2.13.90.0.10-1 The GNU assembler, linker and bina
ii cpp-3.2 1:3.2.1-0pre3 The GNU C preprocessor.
ii gcc-3.2-base 1:3.2.1-0pre3 The GNU Compiler Collection (base
ii libc6 2.2.5-14.3 GNU C Library: Shared libraries an
ii libgcc1 1:3.2.1-0pre3 GCC support library.
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>From doko@cs.tu-berlin.de Fri Apr 18 02:59:51 2003
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Date: Fri, 18 Apr 2003 09:55:02 +0200
To: Anthony DeRobertis <asd@suespammers.org>, 178386-done@bugs.debian.org
Subject: Re: Bug#178386: gcc-3.2: Warns wrong about unreachable code
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Anthony DeRobertis writes:
> Package: gcc-3.2
> Version: 1:3.2.1-0pre3
> Severity: normal
>
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
> gcc-3.2 -Wall -pedantic -ansi -Werror -march=i486 -mcpu=i486 -Os \
> -Wunreachable-code -g -o salt-generator salt-generator.c
> cc1: warnings being treated as errors
> salt-generator.c: In function `main':
> salt-generator.c:47: warning: will never be executed
> make: *** [salt-generator] Error 1
>
> Line 47 is the "do {" line below. Lines around it are:
> for (x = 0; x < SALT_SIZE; ++x) {
> do {
> errno = 0;
> read_cnt = read(rand, &buf, 1);
> } while (read_cnt == -1 && (errno == EINTR || errno == EAGAIN));
> SALT_SIZE is 16.
Fixed in gcc-3.3 and current gcc-3.2 (3.2.3-0pre9).
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