Bug: shell history loses lines beginning with # in a here-document

[Jonathan Wakely]

[I've just created a bug report at Savannah, but looking at the Bash
page on gnu.org I realised it should have ben sent here rather than
<http://savannah.gnu.org/support/?107823>]

Run these command:

$ gcc -x c - <<EOT
 #include <stdio.h>
 int main() { printf("hi\n"); }
 EOT
$ ./a.out
hi

now use the up cursor (or "fc -2" or any equivalent) to return to the
gcc command, it has been
mangled to:

gcc -x c - <<EOTint main() { printf("hi\n"); }
EOT

This is not the same command.
A # in a here-document is not a shell comment!