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From: "palves at redhat dot com" <sourceware-bugzilla@sourceware.org>
To: gdb-prs@sourceware.org
Subject: [Bug symtab/26243] Handle line number 0 in line table produced by
 clang
Date: Thu, 16 Jul 2020 22:22:39 +0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D26243

--- Comment #12 from Pedro Alves <palves at redhat dot com> ---
> I.e., seems like either there's a bug elsewhere, where bar2's length is=20
> determined, or the testcase has a bug.  The other two calls to foo should=
 be=20
> part of the function too.

It's the latter - a simple typo:

diff --git c/gdb/testsuite/gdb.dwarf2/dw2-line-number-zero.exp
w/gdb/testsuite/gdb.dwarf2/dw2-line-number-zero.exp
index e322f777082..acf16848e82 100644
--- c/gdb/testsuite/gdb.dwarf2/dw2-line-number-zero.exp
+++ w/gdb/testsuite/gdb.dwarf2/dw2-line-number-zero.exp
@@ -74,7 +74,7 @@ Dwarf::assemble $asm_file {
                {external 1 flag}
                {name bar2}
                {low_pc $bar2_start addr}
-               {high_pc "$bar2_start + $main_length" addr}
+               {high_pc "$bar2_start + $bar2_length" addr}
            }
        }
     }

With that, I now get:

Running
/home/pedro/gdb/binutils-gdb/src/gdb/testsuite/gdb.dwarf2/dw2-line-number-z=
ero.exp
...
KPASS: gdb.dwarf2/dw2-line-number-zero.exp: continue to breakpoint:
bar1_label_3 (PRMS gdb/nnnnn)
KPASS: gdb.dwarf2/dw2-line-number-zero.exp: continue to breakpoint:
bar2_label_3 (PRMS gdb/nnnnn)

                =3D=3D=3D gdb Summary =3D=3D=3D

# of expected passes            6
# of unknown successes          2

--=20
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