Created attachment 717865 [details]
Reproducer: infobug.tar.gz

Description of problem:
Since texinfo-5.0+ gdbint.info cannot be viewed.

Version-Release number of selected component (if applicable):
FAIL: info-5.1-1.fc20.x86_64
I believe F-19 also fails but I cannot test it due to Bug 922268.
PASS: info-4.13a-18.fc18.x86_64

How reproducible:
Always.

Steps to Reproduce:
info ./bug.info
point at "second::" and press enter

Actual results:
second: No such file or directory

Expected results:
Displayed "Node: second".

Additional info:
The problem is due to:
  @image{img}
and img.txt:
x x============
               x  x   x  x            x       x
               x  x   x  x============x
Curiously any subtle change of "img.txt" will make the bug unreproducible.
doc says:
  `makeinfo' includes `FILENAME.txt' verbatim for Info output
  (more or less as if it was an `@example').
but I have not found the info format documentation and/or what is wrong with the included "img.txt".