http://llvm.org/bugs/show_bug.cgi?id=11752
Bug #: 11752
Summary: ifstream - reopening a file does not see the
beginning.
Product: libc++
Version: unspecified
Platform: Macintosh
OS/Version: MacOS X
Status: NEW
Severity: enhancement
Priority: P
Component: All Bugs
AssignedTo: [email protected]
ReportedBy: [email protected]
CC: [email protected]
Classification: Unclassified
Created attachment 7871
--> http://llvm.org/bugs/attachment.cgi?id=7871
The test program
Hello. I tried this both on the latest Xcode (4.2.1) for Mac OS X, as well as
what I built under Linux and similar results occurred. Specifically, please
check out the included program that opens the test file test.txt that just has
strings line1, line2, and line3 on 3 lines. The first time, the program opens
it and prints the first two lines, everything is fine. The second time, even
though I even tried seekg'ing back to the beginning (shouldn't have to), it
still reads the last line first. The commands I used are attached below.
Notice how it works fine when I do *not* include -stdlib=c++. Note all the
below commands were done on my Mac OS X Lion. Any help would be most
appreciated. Many thanks,
- Toshi
------------------ commands ---------------
bash-3.2$ cat test.txt
line1
line2
line3
bash-3.2$ clang++ --version
Apple clang version 3.0 (tags/Apple/clang-211.12) (based on LLVM 3.0svn)
Target: x86_64-apple-darwin11.2.0
Thread model: posix
bash-3.2$ clang++ -stdlib=libc++ test.cpp
bash-3.2$ ./a.out
Round 1:
first line = line1
second line = line2
Round 2:
first line = line3
second line = line1
bash-3.2$ clang++ test.cpp
bash-3.2$ ./a.out
Round 1:
first line = line1
second line = line2
Round 2:
first line = line1
second line = line2
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