rust-gdb starts with error on nightly

[ereichert]

This may be related to

#35585
#35155

Tried to run rust-gdb for the first time in a while so I'm not sure when this started.

nightly-x86_64-unknown-linux-gnu unchanged - rustc 1.12.0-nightly (197be89 2016-08-15)

rust-gdb --args target/debug/tlx ~/Downloads/moviesample/trailer.mp4
GNU gdb (GDB) 7.11.1
Copyright (C) 2016 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later http://gnu.org/licenses/gpl.html
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law. Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-pc-linux-gnu".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
http://www.gnu.org/software/gdb/bugs/.
Find the GDB manual and other documentation resources online at:
http://www.gnu.org/software/gdb/documentation/.
For help, type "help".
Type "apropos word" to search for commands related to "word"...
Reading symbols from target/debug/tlx...done.
Traceback (most recent call last):
File "/root/.multirust/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/etc/gdb_load_rust_pretty_printers.py", line 11, in
import gdb_rust_pretty_printing
File "/root/.multirust/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/etc/gdb_rust_pretty_printing.py", line 19, in
if sys.version_info.major >= 3:
AttributeError: 'tuple' object has no attribute 'major'
(gdb)

Works on stable however:

stable-x86_64-unknown-linux-gnu unchanged - rustc 1.10.0 (cfcb716 2016-07-03)

rust-gdb --args target/debug/tlx ~/Downloads/moviesample/trailer.mp4
GNU gdb (GDB) 7.11.1
Copyright (C) 2016 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later http://gnu.org/licenses/gpl.html
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law. Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-pc-linux-gnu".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
http://www.gnu.org/software/gdb/bugs/.
Find the GDB manual and other documentation resources online at:
http://www.gnu.org/software/gdb/documentation/.
For help, type "help".
Type "apropos word" to search for commands related to "word"...
Reading symbols from target/debug/tlx...done.
(gdb)

[michaelwoerister]

Can you try opening /root/.multirust/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/etc/gdb_rust_pretty_printing.py and changing the if sys.version_info.major >= 3: to if sys.version_info[0] >= 3:? That should be compatible with more versions of Python.

[ereichert]

Is that request still applicable if I'm using rustup instead of multirust?

[michaelwoerister]

Yes, I just copied the path from your error report above, so that should be the correct one.

[ereichert]

Ignore that last comment. I see that rustup uses .multirust.

Same result however.

rust-gdb --args target/debug/tlx ~/Downloads/moviesample/trailer.mp4
GNU gdb (GDB) 7.11.1
Copyright (C) 2016 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later http://gnu.org/licenses/gpl.html
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law. Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-pc-linux-gnu".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
http://www.gnu.org/software/gdb/bugs/.
Find the GDB manual and other documentation resources online at:
http://www.gnu.org/software/gdb/documentation/.
For help, type "help".
Type "apropos word" to search for commands related to "word"...
Reading symbols from target/debug/tlx...done.
Traceback (most recent call last):
File "/root/.multirust/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/etc/gdb_load_rust_pretty_printers.py", line 11, in
import gdb_rust_pretty_printing
File "/root/.multirust/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/etc/gdb_rust_pretty_printing.py", line 19, in
if sys.version_info.major[0] >= 3:
AttributeError: 'tuple' object has no attribute 'major'
(gdb)

[ereichert]

Sorry. I see the problem.

[ereichert]

That did the job.

rust-gdb --args target/debug/tlx ~/Downloads/moviesample/trailer.mp4
GNU gdb (GDB) 7.11.1
Copyright (C) 2016 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later http://gnu.org/licenses/gpl.html
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law. Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-pc-linux-gnu".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
http://www.gnu.org/software/gdb/bugs/.
Find the GDB manual and other documentation resources online at:
http://www.gnu.org/software/gdb/documentation/.
For help, type "help".
Type "apropos word" to search for commands related to "word"...
Reading symbols from target/debug/tlx...done.
(gdb)

[michaelwoerister]

Excellent :) Thanks for your help! I'll make a PR with the fix.

[ereichert]

Thanks