[Trivial] Fix Link and Grammar in Ternary Changelog

[JackStouffer]

No description provided.

[dlang-bot]

Thanks for your pull request, @JackStouffer!

Bugzilla references

Your PR doesn't reference any Bugzilla issue.

If your PR contains non-trivial changes, please reference a Bugzilla issue or create a manual changelog.

[wilzbach]

Thanks!

[JackStouffer]

@wilzbach GDB got the stack trace

[wilzbach]

@wilzbach GDB got the stack trace

Posting it here for posterity:

Program received signal SIGSEGV, Segmentation fault.
0x0000000000a79b58 in gc.impl.conservative() ()
#0  0x0000000000a79b58 in gc.impl.conservative() ()
#1  0x0000000000a7a14a in gc.impl.conservative() ()
#2  0x0000000000a832ca in rt.util.container.treap() ()
#3  0x0000000000a836bc in rt.util.container.treap() ()
#4  0x0000000000a836aa in rt.util.container.treap() ()
#5  0x0000000000a836aa in rt.util.container.treap() ()
#6  0x0000000000a832a2 in rt.util.container.treap() ()
#7  0x0000000000a7a0f0 in gc.impl.conservative() ()
#8  0x0000000000a7abd6 in gc.impl.conservative() ()

Not really helpful :/

[nemanja-boric-sociomantic]

Are you on the wrong PR? 👼

[JackStouffer]

@nemanja-boric-sociomantic no, dscanner has been segfaulting and we finally got a stack trace

[JackStouffer]

@wilzbach I thought linux gave line numbers for stack traces?

[wilzbach]

I thought linux gave line numbers for stack traces?

It has been broken since a few releases: http://forum.dlang.org/post/ufpwobqmisamazigcaav@forum.dlang.org

[wilzbach]

I logged into the CircleCi machine via ssh and here's the full stacktrace:

0x0000000000a79b58 in gc.impl.conservative() ()
#0  0x0000000000a79b58 in gc.impl.conservative() ()
#1  0x0000000000a7a14a in gc.impl.conservative() ()
#2  0x0000000000a832ca in rt.util.container.treap() ()
#3  0x0000000000a836bc in rt.util.container.treap() ()
#4  0x0000000000a832a2 in rt.util.container.treap() ()
#5  0x0000000000a7a0f0 in gc.impl.conservative() ()
#6  0x0000000000a7abd6 in gc.impl.conservative() ()
#7  0x0000000000a78c2a in gc.impl.conservative() ()
#8  0x0000000000a7cd29 in gc.impl.conservative() ()
#9  0x0000000000a7671f in gc.impl.conservative() ()
#10 0x0000000000a4548f in gc_qalloc ()
#11 0x0000000000a44df0 in core.memory.GC.qalloc() ()
#12 0x0000000000a4e862 in std.array() ()
#13 0x00000000009350cf in std.array() (this=0x7fffffff9f70, extra=1) at ../dmd/generated/linux/release/64/../../../../../phobos/std/array.d:3062
#14 0x0000000000935011 in std.array() (this=..., items=...) at ../dmd/generated/linux/release/64/../../../../../phobos/std/array.d:3065
#15 0x00000000009a9982 in ddoc.macros() (output=..., macros=..., val=...) at libddoc/src/ddoc/macros.d:752
#16 0x00000000009a92c6 in ddoc.macros() (output=..., macros=..., input=...) at libddoc/src/ddoc/macros.d:478
#17 0x00000000009a9b5b in ddoc.macros() (output=..., macros=..., input=...) at libddoc/src/ddoc/macros.d:257
#18 0x00000000009a9861 in ddoc.macros() (output=..., macros=..., val=...) at libddoc/src/ddoc/macros.d:740
#19 0x00000000009a92c6 in ddoc.macros() (output=..., macros=..., input=...) at libddoc/src/ddoc/macros.d:478
#20 0x00000000009a9056 in ddoc.macros() (output=..., macros=..., input=...) at libddoc/src/ddoc/macros.d:186
#21 0x00000000009a7fea in ddoc.macros.expand() (macros=..., input=...) at libddoc/src/ddoc/macros.d:205
#22 0x00000000009a5215 in ddoc.comments.parseComment() (macros=..., text=...) at libddoc/src/ddoc/comments.d:48
#23 0x00000000009b825c in analysis.has_public_example.HasPublicExampleCheck() (this=0x2aaaaabec740, decl=0x3442830) at src/analysis/has_public_example.d:89
#24 0x00000000009b7ffe in analysis.has_public_example.HasPublicExampleCheck() (this=0x2aaaaabec740, decl=0x34427e8)
    at src/analysis/has_public_example.d-mixin-95:95
#25 0x00000000009b7a4e in analysis.has_public_example.HasPublicExampleCheck.visit() (this=0x2aaaaabec740, mod=0x103f210)
    at src/analysis/has_public_example.d:65
#26 0x00000000009f61a3 in analysis.run.analyze() (staticAnalyze=true, tokens=..., moduleCache=..., analysisConfig=..., m=0x103f210, fileName=...)
    at src/analysis/run.d:498
#27 0x00000000009f3382 in analysis.run.analyze() (staticAnalyze=true, moduleCache=..., cache=..., config=..., fileNames=...) at src/analysis/run.d:182
#28 0x0000000000a32763 in D main (args=...) at src/main.d:237
#29 0x0000000000a46c74 in rt.dmain2._d_run_main() ()
#30 0x0000000000a46b04 in rt.dmain2._d_run_main() ()
#31 0x0000000000a46be3 in rt.dmain2._d_run_main() ()
#32 0x0000000000a46b04 in rt.dmain2._d_run_main() ()
#33 0x0000000000a46a6f in _d_run_main ()
#34 0x0000000000a3f236 in main ()

and another one:

#13 0x0000000000957618 in std.array() (this=..., arr=...) at ../dmd/generated/linux/release/64/../../../../../phobos/std/array.d:2856
        cap = 140737488332688
#14 0x0000000000957518 in std.array() () at ../dmd/generated/linux/release/64/../../../../../phobos/std/array.d:3319
No locals.
#15 0x00000000009a9e8c in ddoc.sections.splitSections() (text=...) at libddoc/src/ddoc/sections.d:104
        lex = {current = {text = {length = 9, 
              ptr = 0x47fb0e4 "Evaluates to $(D AliasSeq!(F!(T[0]), F!(T[1]), ..., F!(T[$ - 1]))).EmptySingleTests whether all given items satisfy a template predicate, i.e. evaluates to\n$(D F!(T[0]) && F!(T[1]) && ... && F!(T[$ - "...}, type = 10 '\n'}, offset = 9, text = {length = 67, 
            ptr = 0x47fb0e4 "Evaluates to $(D AliasSeq!(F!(T[0]), F!(T[1]), ..., F!(T[$ - 1]))).EmptySingleTests whether all given items satisfy a template predicate, i.e. evaluates to\n$(D F!(T[0]) && F!(T[1]) && ... && F!(T[$ - "...}, _empty = false, parseHeader = true}
        app = {_data = 0x7fffffffa840}
        hasSummary = 80
        sliceStart = 4
        sliceEnd = 10980278
        name = {length = 4294944976, ptr = 0x94 <Address 0x94 out of bounds>}
        __r3510 = {length = 147, ptr = 0x94}
        __key3511 = 46912497471464
        section = @0x82f2c7: {name = {length = 292929668, ptr = 0x2819e13d8d4800 <Address 0x2819e13d8d4800 out of bounds>}, content = {length = 559320296, 
            ptr = 0x1b80888f8458b48 <Address 0x1b80888f8458b48 out of bounds>}, mapping = {length = 1207959552, ptr = 0x7fff07d81c3}}
#16 0x00000000009a4b9e in ddoc.comments.parseComment() (macros=..., text=...) at libddoc/src/ddoc/comments.d:21
        sections = {length = 4294945264, ptr = 0xa5c620}
        sMacros = {ptr = 0x94}
        m = {length = 0, ptr = 0x2aaaaabf4fe0}
        e = {length = 4294945296, ptr = 0x2aaaaabf4fe8}
        p = {length = 2864666880, ptr = 0x7fffffffaa98}
        __r3357 = {length = 0, ptr = 0x0}
        __key3358 = 148
        kv = {__expand_field_0 = {length = 4294945584, ptr = 0xa5c4f8 "UH\213\354H\203\354PH\211]\260H\211}\370H\213\032\213>\350\252\n\003"}, 
          __expand_field_1 = {length = 148, ptr = 0x7fffffffab60 "p\207", <incomplete sequence \336>}}
        __aaval3359 = @0x7fffffffaa60: {length = 4294945504, ptr = 0x34 <Address 0x34 out of bounds>}
        __r3360 = {length = 4294945504, ptr = 0x34}
        __key3361 = 140737488333680
        kv = @0x8e5102: {__expand_field_0 = {length = 1082493256, ptr = 0xe8870f0dfb83f85d <Address 0xe8870f0dfb83f85d out of bounds>}, __expand_field_1 = {
            length = 2332033027, ptr = 0x980c6348001fa032 <Address 0x980c6348001fa032 out of bounds>}}
        __r3362 = {length = 4294958140, ptr = 0x7}
        __key3363 = 140737488333616
        sec = @0xa4387c: {name = {length = 2484060293, ptr = 0x20ec8348ec8b4855 <Address 0x20ec8348ec8b4855 out of bounds>}, content = {length = 3766323528, 
            ptr = 0xf84d8948f0558948 <Address 0xf84d8948f0558948 out of bounds>}, mapping = {length = 1979332936, ptr = 0x74ff8548057500f0}}
        retVal = {sections = {length = 14583664, ptr = 0xde8770}}
#17 0x00000000009b825c in analysis.has_public_example.HasPublicExampleCheck() (this=0x2aaaaabed740, decl=0x3449208) at src/analysis/has_public_example.d:89

[wilzbach]

And another one:

#13 0x0000000000957885 in std.array() (this=..., nelems=1) at ../dmd/generated/linux/release/64/../../../../../phobos/std/array.d:2968
        len = 0
        reqlen = 1
        newlen = 8
        u = 46912497489472
        overflow = false
        nbytes = 384
        bi = {base = 0xdf7560, size = 140737488332528, attr = 10783447}
#14 0x0000000000957a3d in std.array() (this=..., item=...) at ../dmd/generated/linux/release/64/../../../../../phobos/std/array.d:3019
        len = 0
        bigData = {length = 0, ptr = 0x7fffffffa6e0}
#15 0x0000000000957bb5 in std.array() (this=..., rhs=...) at ../dmd/generated/linux/release/64/../../../../../phobos/std/array.d:3109
No locals.
#16 0x00000000009a9f57 in ddoc.sections.splitSections() (text=...) at libddoc/src/ddoc/sections.d:111
        lex = {current = {text = {length = 7, ptr = 0x47fb016 "Returns the type from TList that is the most derived from type T.\nIf none are found, T is returned.DerivedToFrontReturns the `AliasSeq` TList with the types sorted so that the most\nderived types come "...}, type = 10 '\n'}, offset = 7, text = {length = 99, ptr = 0x47fb016 "Returns the type from TList that is the most derived from type T.\nIf none are found, T is returned.DerivedToFrontReturns the `AliasSeq` TList with the types sorted so that the most\nderived types come "...}, _empty = false, parseHeader = true}
        app = {_data = 0x2aaaaabf9640}
        hasSummary = false
        sliceStart = 0
        sliceEnd = 0
        name = {length = 0, ptr = 0x0}
        __r3510 = {length = 119, ptr = 0x78}
        __key3511 = 46912497489448
        section = @0x82f2c7: {name = {length = 292929668, ptr = 0x2819e13d8d4800 <Address 0x2819e13d8d4800 out of bounds>}, content = {length = 559320296, ptr = 0x1b80888f8458b48 <Address 0x1b80888f8458b48 out of bounds>}, mapping = {length = 1207959552, ptr = 0x7fff07d81c3}}
#17 0x00000000009a4b9e in ddoc.comments.parseComment() (macros=..., text=...) at libddoc/src/ddoc/comments.d:21
        sections = {length = 4294945264, ptr = 0xa5c620}
        sMacros = {ptr = 0x78}
        m = {length = 0, ptr = 0x2aaaaabf9620}
        e = {length = 4294945296, ptr = 0x2aaaaabf9628}
        p = {length = 2864662656, ptr = 0x7fffffffaa98}
        __r3357 = {length = 0, ptr = 0x0}
        __key3358 = 120
        kv = {__expand_field_0 = {length = 4294945584, ptr = 0xa5c4f8 "UH\213\354H\203\354PH\211]\260H\211}\370H\213\032\213>\350\252\n\003"}, __expand_field_1 = {length = 120, ptr = 0x7fffffffab60 "p\207", <incomplete sequence \336>}}
        __aaval3359 = @0x7fffffffaa60: {length = 4294945504, ptr = 0x30 <Address 0x30 out of bounds>}
        __r3360 = {length = 4294945504, ptr = 0x30}
        __key3361 = 140737488333680
        kv = @0x8e5102: {__expand_field_0 = {length = 1082493256, ptr = 0xe8870f0dfb83f85d <Address 0xe8870f0dfb83f85d out of bounds>}, __expand_field_1 = {length = 2332033027, ptr = 0x980c6348001fa032 <Address 0x980c6348001fa032 out of bounds>}}
        __r3362 = {length = 4294958140, ptr = 0x7}
        __key3363 = 140737488333616
        sec = @0xa4387c: {name = {length = 2484060293, ptr = 0x20ec8348ec8b4855 <Address 0x20ec8348ec8b4855 out of bounds>}, content = {length = 3766323528, ptr = 0xf84d8948f0558948 <Address 0xf84d8948f0558948 out of bounds>}, mapping = {length = 1979332936, ptr = 0x74ff8548057500f0}}
        retVal = {sections = {length = 14583664, ptr = 0xde8770}}
#18 0x00000000009b825c in analysis.has_public_example.HasPublicExampleCheck() (this=0x2aaaaabeda40, decl=0x343cb08) at src/analysis/has_public_example.d:89
No locals.

Another one:

0x0000000000a79b58 in gc.impl.conservative() ()
#0  0x0000000000a79b58 in gc.impl.conservative() ()
No symbol table info available.
#1  0x0000000000a7a14a in gc.impl.conservative() ()
No symbol table info available.
#2  0x0000000000a832ca in rt.util.container.treap() ()
No symbol table info available.
#3  0x0000000000a836bc in rt.util.container.treap() ()
No symbol table info available.
#4  0x0000000000a836aa in rt.util.container.treap() ()
No symbol table info available.
#5  0x0000000000a832a2 in rt.util.container.treap() ()
No symbol table info available.
#6  0x0000000000a7a0f0 in gc.impl.conservative() ()
No symbol table info available.
#7  0x0000000000a7abd6 in gc.impl.conservative() ()
No symbol table info available.
#8  0x0000000000a78c2a in gc.impl.conservative() ()
No symbol table info available.
#9  0x0000000000a7cd29 in gc.impl.conservative() ()
No symbol table info available.
#10 0x0000000000a7671f in gc.impl.conservative() ()
No symbol table info available.
#11 0x0000000000a4548f in gc_qalloc ()
No symbol table info available.
#12 0x0000000000a7fa17 in rt.lifetime.__arrayAlloc() ()
No symbol table info available.
#13 0x0000000000a49570 in _d_arraysetlengthT ()
No symbol table info available.
#14 0x00000000009c0618 in analysis.redundant_attributes.RedundantAttributesCheck.pushScope() (this=0x2aaaaabd3000) at src/analysis/redundant_attributes.d:167
        __pitmp4108 = 4
        __arraylength4109 = 0x2aaaaabd3038

Information gathered:

• seems to be an allocation issue in druntime as I get a totally different stack trace
• only occurs on every second or third run (concurrency!)
• I tried to compile druntime + phobos with debug, but I couldn't reproduce the segfault then

[wilzbach]

(rebased to hopefully avoid the persistent CircleCi segfaults).