To reproduce the issue, just run: markus@x4 ~ % git clone git://gcc.gnu.org/git/gcc.git markus@x4 gcc % git checkout -b gcc-6 origin/gcc-6-branch markus@x4 gcc % git bisect bad 23240454adf1 You need to start by "git bisect start" Do you want me to do it for you [Y/n]? y markus@x4 gcc % git bisect good 558525d0cf3 Bisecting: 45 revisions left to test after this (roughly 6 steps) [c4727bc59ecad9e8879aed135624781fabae16b5] PR c++/71372 * cp-gimplify.c (cp_fold): For INDIRECT_REF, if the folded expression is INDIRECT_REF or MEM_REF, copy over TREE_READONLY, TREE_SIDE_EFFECTS and TREE_THIS_VOLATILE flags. For ARRAY_REF and ARRAY_RANGE_REF, copy over TREE_READONLY, TREE_SIDE_EFFECTS and TREE_THIS_VOLATILE flags to the newly built tree. markus@x4 gcc % git bisect bad Bisecting: 22 revisions left to test after this (roughly 5 steps) [6935372a7f032acccf7876e7f54ddf494e101e5e] 2016-05-31 Richard Biener <rguenther@xxxxxxx> markus@x4 gcc % git bisect bad Bisecting: 10 revisions left to test after this (roughly 4 steps) [909ed6a89604db5baa55b62ad253a9bcd5d89c03] backport "Remove assert in get_def_bb_for_const" markus@x4 gcc % git bisect bad Bisecting: 5 revisions left to test after this (roughly 3 steps) [f216419e5c4c41df70dbe00a6ea1faea46484dc8] gcc/ markus@x4 gcc % git bisect bad Bisecting: 2 revisions left to test after this (roughly 1 step) [745d4ecd59a3430f7c7b3bf33db1083d529a018b] libstdc++/70762 fix fallback implementation of nonexistent_path markus@x4 gcc % git bisect good Bisecting: 0 revisions left to test after this (roughly 1 step) [a64301f7ac47b9d8f4f816c5e935cda4c92716b7] 2016-05-26 Jerry DeLisle <jvdelisle@xxxxxxxxxxx> markus@x4 gcc % git bisect good f216419e5c4c41df70dbe00a6ea1faea46484dc8 is the first bad commit commit f216419e5c4c41df70dbe00a6ea1faea46484dc8 fatal: you want to use way too much memory markus@x4 gcc % -- Markus
git bisect start # bad: [23240454adf160862453a3a850451a304867c29b] Backported from mainline 2016-06-04 Jakub Jelinek <jakub@xxxxxxxxxx> git bisect bad 23240454adf160862453a3a850451a304867c29b # good: [558525d0cf372a48ae12b1dc27201dd47ab7878c] Daily bump. git bisect good 558525d0cf372a48ae12b1dc27201dd47ab7878c # bad: [c4727bc59ecad9e8879aed135624781fabae16b5] PR c++/71372 * cp-gimplify.c (cp_fold): For INDIRECT_REF, if the folded expression is INDIRECT_REF or MEM_REF, copy over TREE_READONLY, TREE_SIDE_EFFECTS and TREE_THIS_VOLATILE flags. For ARRAY_REF and ARRAY_RANGE_REF, copy over TREE_READONLY, TREE_SIDE_EFFECTS and TREE_THIS_VOLATILE flags to the newly built tree. git bisect bad c4727bc59ecad9e8879aed135624781fabae16b5 # bad: [6935372a7f032acccf7876e7f54ddf494e101e5e] 2016-05-31 Richard Biener <rguenther@xxxxxxx> git bisect bad 6935372a7f032acccf7876e7f54ddf494e101e5e # bad: [909ed6a89604db5baa55b62ad253a9bcd5d89c03] backport "Remove assert in get_def_bb_for_const" git bisect bad 909ed6a89604db5baa55b62ad253a9bcd5d89c03 # bad: [f216419e5c4c41df70dbe00a6ea1faea46484dc8] gcc/ git bisect bad f216419e5c4c41df70dbe00a6ea1faea46484dc8 # good: [745d4ecd59a3430f7c7b3bf33db1083d529a018b] libstdc++/70762 fix fallback implementation of nonexistent_path git bisect good 745d4ecd59a3430f7c7b3bf33db1083d529a018b # good: [a64301f7ac47b9d8f4f816c5e935cda4c92716b7] 2016-05-26 Jerry DeLisle <jvdelisle@xxxxxxxxxxx> git bisect good a64301f7ac47b9d8f4f816c5e935cda4c92716b7