Just so it's clear - I haven't randomly reproduced this like all the people in this thread have, I manually inserted an error into a file and ran into identical problems as reported in this thread.
I don't know tons about how the YAML that ends up in /var/lib/app- info/yaml is generated, but I thought it was all based upon packages in the Ubuntu archives. Since it's not a 100% reproduction rate, my conjecture would be a mirroring problem or download problem that introduced some corruption along the way. It would be great for someone who is inherently affected without doing anything wrong to share their contents of /var/lib/app- info/yaml while affected. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to appstream-glib in Ubuntu. https://bugs.launchpad.net/bugs/1591868 Title: fwupd consuming 100% CPU Status in appstream-glib package in Ubuntu: Confirmed Status in fwupd package in Ubuntu: Invalid Status in appstream-glib source package in Xenial: New Status in fwupd source package in Xenial: Invalid Status in appstream-glib source package in Yakkety: Confirmed Status in fwupd source package in Yakkety: Invalid Bug description: fwupd process has been consuming 100% of my CPU for several days now (IBM Thinkpad x250 running fully updated 16.04). gdb backtrace below. Thread 2 (Thread 0x7f3272cf5700 (LWP 4496)): #0 0x00007f3279b79e8d in poll () at ../sysdeps/unix/syscall-template.S:84 No locals. #1 0x00007f327ae9331c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 No symbol table info available. #2 0x00007f327ae9342c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 No symbol table info available. #3 0x00007f327ae93469 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 No symbol table info available. #4 0x00007f327aeb9b45 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 No symbol table info available. #5 0x00007f3279e4f6fa in start_thread (arg=0x7f3272cf5700) at pthread_create.c:333 __res = <optimized out> pd = 0x7f3272cf5700 now = <optimized out> unwind_buf = {cancel_jmp_buf = {{jmp_buf = {139854651283200, 418179942412000561, 0, 140731891236207, 139854651283904, 0, -312637405101744847, -312613451844084431}, mask_was_saved = 0}}, priv = {pad = { 0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}} not_first_call = <optimized out> pagesize_m1 = <optimized out> sp = <optimized out> freesize = <optimized out> __PRETTY_FUNCTION__ = "start_thread" #6 0x00007f3279b85b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109 No locals. Thread 1 (Thread 0x7f327c926900 (LWP 4486)): #0 0x00007f3279e542b7 in __GI___pthread_rwlock_rdlock (rwlock=0x7f3279e43920 <__libc_setlocale_lock>) at pthread_rwlock_rdlock.c:135 result = 0 wake = false #1 0x00007f3279aaf0e9 in __dcigettext (domainname=0x7f327aedee63 "glib20", msgid1=0x7f327b4ca11a "Invalid compressed data", msgid2=0x0, plural=0, n=0, category=5) at dcigettext.c:527 __p = <optimized out> domain = <optimized out> binding = <optimized out> categoryname = <optimized out> categoryvalue = <optimized out> dirname = <optimized out> xdomainname = <optimized out> single_locale = <optimized out> retval = <optimized out> retlen = 93892446493824 saved_errno = 0 search = {domainname = 0x7ffeb262bb00 "`\234\353\teU", category = 166588464, localename = 0x556509ededa8 "p\362\355\teU", counter = 166589040, domain = 0x23, translation = 0x5565fffffffb <error: Cannot access memory at address 0x5565fffffffb>, translation_length = 93892446493792, msgid = {appended = 0x7ffeb262bb08 "", ptr = 0x52fb0a5631f15a00 <error: Cannot access memory at address 0x52fb0a5631f15a00>}} foundp = 0x0 localename = <optimized out> domainname_len = <optimized out> #2 0x00007f327b44338c in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0 No symbol table info available. #3 0x00007f327b3e95f9 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0 No symbol table info available. #4 0x00007f327b40d315 in g_input_stream_read () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0 No symbol table info available. #5 0x00007f327c1ae569 in ?? () from /usr/lib/x86_64-linux-gnu/libappstream-glib.so.8 No symbol table info available. #6 0x00007f3278c51a15 in ?? () from /usr/lib/x86_64-linux-gnu/libyaml-0.so.2 No symbol table info available. #7 0x00007f3278c51cde in yaml_parser_update_buffer () from /usr/lib/x86_64-linux-gnu/libyaml-0.so.2 No symbol table info available. #8 0x00007f3278c56498 in yaml_parser_fetch_more_tokens () from /usr/lib/x86_64-linux-gnu/libyaml-0.so.2 No symbol table info available. #9 0x00007f3278c5b32f in yaml_parser_parse () from /usr/lib/x86_64-linux-gnu/libyaml-0.so.2 No symbol table info available. #10 0x00007f327c1ae39b in ?? () from /usr/lib/x86_64-linux-gnu/libappstream-glib.so.8 No symbol table info available. #11 0x00007f327c1ae890 in as_yaml_from_file () from /usr/lib/x86_64-linux-gnu/libappstream-glib.so.8 No symbol table info available. #12 0x00007f327c1a9231 in ?? () from /usr/lib/x86_64-linux-gnu/libappstream-glib.so.8 No symbol table info available. #13 0x00007f327c1a9867 in ?? () from /usr/lib/x86_64-linux-gnu/libappstream-glib.so.8 No symbol table info available. #14 0x00007f327c1a9ee1 in ?? () from /usr/lib/x86_64-linux-gnu/libappstream-glib.so.8 No symbol table info available. #15 0x00007f327c1aa994 in as_store_load () from /usr/lib/x86_64-linux-gnu/libappstream-glib.so.8 No symbol table info available. #16 0x00005565094a59c7 in main () No symbol table info available. 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