#15808: Loading libraries with FFI exports may cause segfaults in the compiler if they are loaded far from the rts in memory. -------------------------------------+------------------------------------- Reporter: AndreasK | Owner: (none) Type: bug | Status: new Priority: high | Milestone: Component: Compiler | Version: 8.7 (Linking) | Resolution: | Keywords: Operating System: Windows | Architecture: x86_64 Type of failure: Compile-time | (amd64) crash or panic | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Changes (by AndreasK): * component: Compiler => Compiler (Linking) * priority: normal => high * failure: None/Unknown => Compile-time crash or panic * architecture: Unknown/Multiple => x86_64 (amd64) * os: Unknown/Multiple => Windows Old description:
I haven't had any luck with reproducing it outside of building the aeson package with cabal yet. So for now just documenting the fact.
build.mk used {{{ GhcLibHcOpts += -g3 GhcRtsHcOpts += -g3
STRIP_CMD = :
BUILD_PROF_LIBS = NO SplitObjs = NO SplitSections = NO HADDOCK_DOCS = NO BUILD_SPHINX_HTML = NO BUILD_SPHINX_PDF = NO BUILD_MAN = NO
}}}
Error log: {{{ "E:/ghc_dwarf/inplace/bin/ghc-stage2.exe" "--make" "-fbuilding-cabal- package" "-O" "-outputdir" "C:\ghc\msys64\home\Andi\aeson_repro\dist- newstyle\build\x86_64-windows\ghc-8.7.20181025\aeson-1.4.1.0\build" "-odir" "C:\ghc\msys64\home\Andi\aeson_repro\dist- newstyle\build\x86_64-windows\ghc-8.7.20181025\aeson-1.4.1.0\build" "-hidir" "C:\ghc\msys64\home\Andi\aeson_repro\dist- newstyle\build\x86_64-windows\ghc-8.7.20181025\aeson-1.4.1.0\build" "-stubdir" "C:\ghc\msys64\home\Andi\aeson_repro\dist- newstyle\build\x86_64-windows\ghc-8.7.20181025\aeson-1.4.1.0\build""-i" "-iC:\ghc\msys64\home\Andi\aeson_repro\dist- newstyle\build\x86_64-windows\ghc-8.7.20181025\aeson-1.4.1.0\build" "-i." "-iattoparsec-iso8601/" "-ipure" "-iC:\ghc\msys64\home\Andi\aeson_repro \dist- newstyle\build\x86_64-windows\ghc-8.7.20181025\aeson-1.4.1.0\build\autogen" "-iC:\ghc\msys64\home\Andi\aeson_repro\dist- newstyle\build\x86_64-windows\ghc-8.7.20181025\aeson-1.4.1.0\build \global-autogen" "-IC:\ghc\msys64\home\Andi\aeson_repro\dist- newstyle\build\x86_64-windows\ghc-8.7.20181025\aeson-1.4.1.0\build\autogen" "-IC:\ghc\msys64\home\Andi\aeson_repro\dist- newstyle\build\x86_64-windows\ghc-8.7.20181025\aeson-1.4.1.0\build \global-autogen" "-IC:\ghc\msys64\home\Andi\aeson_repro\dist- newstyle\build\x86_64-windows\ghc-8.7.20181025\aeson-1.4.1.0\build" "-Iinclude" "-IC:\ghc\msys64\home\Andi\aeson_repro\dist- newstyle\build\x86_64-windows\ghc-8.7.20181025\aeson-1.4.1.0\build\include" "-optP-include" "-optPC:\ghc\msys64\home\Andi\aeson_repro\dist- newstyle\build\x86_64-windows\ghc-8.7.20181025\aeson-1.4.1.0\build\autogen\cabal_macros.h" "-this-unit-id" "aeson-1.4.1.0-inplace" "-hide-all-packages" "-Wmissing- home-modules" "-no-user-package-db" "-package-db" "C:\Users\Andi\AppData\Roaming\cabal\store\ghc-8.7.20181025\package.db" "-package-db" "C:\ghc\msys64\home\Andi\aeson_repro\dist- newstyle\packagedb\ghc-8.7.20181025" "-package-db" "C:\ghc\msys64\home\Andi\aeson_repro\dist- newstyle\build\x86_64-windows\ghc-8.7.20181025\aeson-1.4.1.0\package.conf.inplace" "-package-id" "attoparsec-0.13.2.2-8913a968506e9e83757f6fe696d6fe61e0d4b4a8" "-package- id" "base-4.12.0.0" "-package-id" "base- compat-0.10.5-34e11ceb2d98e0262d1d958bca2afc3184e70c60" "-package-id" "bytestring-0.10.8.2" "-package-id" "containers-0.6.0.1" "-package-id" "deepseq-1.4.4.0" "-package-id" "dlist-0.8.0.5-681a0f929505417757ba9f9981a50ab1d7c8a0e0" "-package-id" "ghc-prim-0.5.3" "-package-id" "hashable-1.2.7.0-50f89c5dee92df34fc2d6540cfde1983f26d8e31" "-package-id" "primitive-0.6.4.0-c08c185073660c1604acdddfe5c369afae583ba2" "-package- id" "scientific-0.3.6.2-4bea197b4523e02da61c34a1eed01432d9fefff6" "-package-id" "tagged-0.8.6-d3cce1acba663b646f565adb64d80579664d8caa" "-package-id" "template-haskell-2.14.0.0" "-package-id" "text-1.2.3.1" "-package-id" "th- abstraction-0.2.8.0-e197ba78a6de8bf8fc5d00ecb5a358a8b27bcc92" "-package- id" "time-1.8.0.2" "-package-id" "time-locale- c_-0.1.1.5-7549537073e62ce01921c89c30cc6cafeed99b5b" "-package-id" "unordered-con_-0.2.9.0-f5cd33176070f516c88b1aac3ef61959b09fcfa6" "-package-id" "uuid-types-1.0.3-f68643250767dce83d2c227104d15a0aa9c3c77f" "-package-id" "vector-0.12.0.1-3a9a26f81a463f0efefa41528af3e27d3a88cc7d" "-XHaskell2010" "Data.Aeson" "Data.Aeson.Encoding" "Data.Aeson.Parser" "Data.Aeson.Text" "Data.Aeson.Types" "Data.Aeson.TH" "Data.Aeson.QQ.Simple" "Data.Aeson.Encoding.Internal" "Data.Aeson.Internal" "Data.Aeson.Internal.Time" "Data.Aeson.Parser.Internal" "Data.Aeson.Encode" "Data.Aeson.Compat" "Data.Aeson.Encoding.Builder" "Data.Aeson.Internal.Functions" "Data.Aeson.Parser.Unescape" "Data.Aeson.Parser.Time" "Data.Aeson.Types.FromJSON" "Data.Aeson.Types.Generic" "Data.Aeson.Types.ToJSON" "Data.Aeson.Types.Class" "Data.Aeson.Types.Internal" "Data.Attoparsec.Time" "Data.Attoparsec.Time.Internal" "Data.Aeson.Parser.UnescapePure" "-Wall" "-O2" "-hide-all-packages" "-g13" [ 2 of 25] Compiling Data.Aeson.Internal.Functions ( Data\Aeson\Internal\Functions.hs, C:\ghc\msys64\home\Andi\aeson_repro \dist- newstyle\build\x86_64-windows\ghc-8.7.20181025\aeson-1.4.1.0\build\Data\Aeson\Internal\Functions.o ) [Data.HashMap.Strict changed] [ 5 of 25] Compiling Data.Aeson.Types.Generic ( Data\Aeson\Types\Generic.hs, C:\ghc\msys64\home\Andi\aeson_repro\dist- newstyle\build\x86_64-windows\ghc-8.7.20181025\aeson-1.4.1.0\build\Data\Aeson\Types\Generic.o ) [Prelude.Compat changed] [ 6 of 25] Compiling Data.Aeson.Types.Internal ( Data\Aeson\Types\Internal.hs, C:\ghc\msys64\home\Andi\aeson_repro\dist- newstyle\build\x86_64-windows\ghc-8.7.20181025\aeson-1.4.1.0\build\Data\Aeson\Types\Internal.o ) [Data.Vector changed] [ 7 of 25] Compiling Data.Aeson.Parser.Internal ( Data\Aeson\Parser\Internal.hs, C:\ghc\msys64\home\Andi\aeson_repro\dist- newstyle\build\x86_64-windows\ghc-8.7.20181025\aeson-1.4.1.0\build\Data\Aeson\Parser\Internal.o ) [Data.Scientific changed] [ 8 of 25] Compiling Data.Aeson.Parser ( Data\Aeson\Parser.hs, C:\ghc\msys64\home\Andi\aeson_repro\dist- newstyle\build\x86_64-windows\ghc-8.7.20181025\aeson-1.4.1.0\build\Data\Aeson\Parser.o ) [Data.Aeson.Parser.Internal changed] [ 9 of 25] Compiling Data.Attoparsec.Time.Internal ( attoparsec- iso8601\Data\Attoparsec\Time\Internal.hs, C:\ghc\msys64\home\Andi\aeson_repro\dist- newstyle\build\x86_64-windows\ghc-8.7.20181025\aeson-1.4.1.0\build\Data\Attoparsec\Time\Internal.o ) [Prelude.Compat changed]
attoparsec-iso8601\Data\Attoparsec\Time\Internal.hs:24:1: warning: [-Wunused-imports] The import of `Unsafe.Coerce' is redundant except perhaps to import instances from `Unsafe.Coerce' To import instances alone, use: import Unsafe.Coerce() | 24 | import Unsafe.Coerce (unsafeCoerce) | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [10 of 25] Compiling Data.Attoparsec.Time ( attoparsec- iso8601\Data\Attoparsec\Time.hs, C:\ghc\msys64\home\Andi\aeson_repro \dist- newstyle\build\x86_64-windows\ghc-8.7.20181025\aeson-1.4.1.0\build\Data\Attoparsec\Time.o ) [Data.Attoparsec.Text changed] [11 of 25] Compiling Data.Aeson.Parser.Time ( Data\Aeson\Parser\Time.hs, C:\ghc\msys64\home\Andi\aeson_repro\dist- newstyle\build\x86_64-windows\ghc-8.7.20181025\aeson-1.4.1.0\build\Data\Aeson\Parser\Time.o ) [Data.Attoparsec.Text changed] [12 of 25] Compiling Data.Aeson.Types.FromJSON ( Data\Aeson\Types\FromJSON.hs, C:\ghc\msys64\home\Andi\aeson_repro\dist- newstyle\build\x86_64-windows\ghc-8.7.20181025\aeson-1.4.1.0\build\Data\Aeson\Types\FromJSON.o ) [Data.Primitive.PrimArray changed] [13 of 25] Compiling Data.Aeson.Internal ( Data\Aeson\Internal.hs, C:\ghc\msys64\home\Andi\aeson_repro\dist- newstyle\build\x86_64-windows\ghc-8.7.20181025\aeson-1.4.1.0\build\Data\Aeson\Internal.o ) [Data.Aeson.Types.FromJSON changed] [14 of 25] Compiling Data.Aeson.Internal.Time ( Data\Aeson\Internal\Time.hs, C:\ghc\msys64\home\Andi\aeson_repro\dist- newstyle\build\x86_64-windows\ghc-8.7.20181025\aeson-1.4.1.0\build\Data\Aeson\Internal\Time.o ) [Data.Attoparsec.Time.Internal changed] [15 of 25] Compiling Data.Aeson.Encoding.Builder ( Data\Aeson\Encoding\Builder.hs, C:\ghc\msys64\home\Andi\aeson_repro\dist- newstyle\build\x86_64-windows\ghc-8.7.20181025\aeson-1.4.1.0\build\Data\Aeson\Encoding\Builder.o ) [Data.Vector changed] [16 of 25] Compiling Data.Aeson.Encoding.Internal ( Data\Aeson\Encoding\Internal.hs, C:\ghc\msys64\home\Andi\aeson_repro \dist- newstyle\build\x86_64-windows\ghc-8.7.20181025\aeson-1.4.1.0\build\Data\Aeson\Encoding\Internal.o ) [Data.Scientific changed] [17 of 25] Compiling Data.Aeson.Encoding ( Data\Aeson\Encoding.hs, C:\ghc\msys64\home\Andi\aeson_repro\dist- newstyle\build\x86_64-windows\ghc-8.7.20181025\aeson-1.4.1.0\build\Data\Aeson\Encoding.o ) [Data.Aeson.Encoding.Internal changed] [18 of 25] Compiling Data.Aeson.Types.ToJSON ( Data\Aeson\Types\ToJSON.hs, C:\ghc\msys64\home\Andi\aeson_repro\dist- newstyle\build\x86_64-windows\ghc-8.7.20181025\aeson-1.4.1.0\build\Data\Aeson\Types\ToJSON.o ) [Data.Primitive.PrimArray changed]
Access violation in generated code when executing data at 0x103fec440
Attempting to reconstruct a stack trace...
Frame Code address * 0x845d9c0 0x103fec440 * 0x845da20 0x400c0f8 E:\ghc_dwarf\inplace\bin\ghc- stage2.exe+0x3c0c0f8 * 0x845da80 0x3fec9a1 E:\ghc_dwarf\inplace\bin\ghc- stage2.exe+0x3bec9a1 * 0x845dab0 0x3feca31 E:\ghc_dwarf\inplace\bin\ghc- stage2.exe+0x3beca31 * 0x845dab8 0x34c8934 E:\ghc_dwarf\inplace\bin\ghc- stage2.exe+0x30c8934 * 0x845dac0 0xfa340 * 0x845dac8 0x2a940b78 * 0x845dad0 0x2a98cd69 * 0x845dad8 0x2a98d7d0
CallStack (from HasCallStack): die', called at .\\Distribution\\Client\\ProjectOrchestration.hs:977:55 in main:Distribution.Client.ProjectOrchestration cabal.exe: Failed to build aeson-1.4.1.0-inplace. The build process terminated with exit code 11 }}}
I could only reproduce it with master on Windows so far. It always triggers but under very specific circumstances: * GHC built with the flags above, adding dwarf info to the ghc executable or removing dwarf info eliminates the issue. * Only on a complete rebuild of aeson. Restarting the crashed build finishes without an error.
New description: Original report below. In this case we compile aeson which uses TH triggering dynamic loading of a number of libraries. Some libraries (eg base) have FFI exports which require us to place a relative jump to the RTS in order to register a stable name. Now an issue arises if base is placed more than 2G from the RTS as we can't have relative jumps are limited to a 2GB range. In the particular case this caused the jump target to underflow, resulting in a jump to unallocated memory and a segfault. In more detail the PE linker (PEi386.c:ocResolve_PEi386) fails to detect, or properly deal with the bounds violation. There seems to be some code in place to deal with an overflow already but fails to detect it. ---- I haven't had any luck with reproducing it outside of building the aeson package with cabal yet. So for now just documenting the fact. build.mk used {{{ GhcLibHcOpts += -g3 GhcRtsHcOpts += -g3 STRIP_CMD = : BUILD_PROF_LIBS = NO SplitObjs = NO SplitSections = NO HADDOCK_DOCS = NO BUILD_SPHINX_HTML = NO BUILD_SPHINX_PDF = NO BUILD_MAN = NO }}} Error log: {{{ "E:/ghc_dwarf/inplace/bin/ghc-stage2.exe" "--make" "-fbuilding-cabal- package" "-O" "-outputdir" "C:\ghc\msys64\home\Andi\aeson_repro\dist- newstyle\build\x86_64-windows\ghc-8.7.20181025\aeson-1.4.1.0\build" "-odir" "C:\ghc\msys64\home\Andi\aeson_repro\dist- newstyle\build\x86_64-windows\ghc-8.7.20181025\aeson-1.4.1.0\build" "-hidir" "C:\ghc\msys64\home\Andi\aeson_repro\dist- newstyle\build\x86_64-windows\ghc-8.7.20181025\aeson-1.4.1.0\build" "-stubdir" "C:\ghc\msys64\home\Andi\aeson_repro\dist- newstyle\build\x86_64-windows\ghc-8.7.20181025\aeson-1.4.1.0\build""-i" "-iC:\ghc\msys64\home\Andi\aeson_repro\dist- newstyle\build\x86_64-windows\ghc-8.7.20181025\aeson-1.4.1.0\build" "-i." "-iattoparsec-iso8601/" "-ipure" "-iC:\ghc\msys64\home\Andi\aeson_repro \dist- newstyle\build\x86_64-windows\ghc-8.7.20181025\aeson-1.4.1.0\build\autogen" "-iC:\ghc\msys64\home\Andi\aeson_repro\dist- newstyle\build\x86_64-windows\ghc-8.7.20181025\aeson-1.4.1.0\build\global- autogen" "-IC:\ghc\msys64\home\Andi\aeson_repro\dist- newstyle\build\x86_64-windows\ghc-8.7.20181025\aeson-1.4.1.0\build\autogen" "-IC:\ghc\msys64\home\Andi\aeson_repro\dist- newstyle\build\x86_64-windows\ghc-8.7.20181025\aeson-1.4.1.0\build\global- autogen" "-IC:\ghc\msys64\home\Andi\aeson_repro\dist- newstyle\build\x86_64-windows\ghc-8.7.20181025\aeson-1.4.1.0\build" "-Iinclude" "-IC:\ghc\msys64\home\Andi\aeson_repro\dist- newstyle\build\x86_64-windows\ghc-8.7.20181025\aeson-1.4.1.0\build\include" "-optP-include" "-optPC:\ghc\msys64\home\Andi\aeson_repro\dist- newstyle\build\x86_64-windows\ghc-8.7.20181025\aeson-1.4.1.0\build\autogen\cabal_macros.h" "-this-unit-id" "aeson-1.4.1.0-inplace" "-hide-all-packages" "-Wmissing- home-modules" "-no-user-package-db" "-package-db" "C:\Users\Andi\AppData\Roaming\cabal\store\ghc-8.7.20181025\package.db" "-package-db" "C:\ghc\msys64\home\Andi\aeson_repro\dist- newstyle\packagedb\ghc-8.7.20181025" "-package-db" "C:\ghc\msys64\home\Andi\aeson_repro\dist- newstyle\build\x86_64-windows\ghc-8.7.20181025\aeson-1.4.1.0\package.conf.inplace" "-package-id" "attoparsec-0.13.2.2-8913a968506e9e83757f6fe696d6fe61e0d4b4a8" "-package- id" "base-4.12.0.0" "-package-id" "base- compat-0.10.5-34e11ceb2d98e0262d1d958bca2afc3184e70c60" "-package-id" "bytestring-0.10.8.2" "-package-id" "containers-0.6.0.1" "-package-id" "deepseq-1.4.4.0" "-package-id" "dlist-0.8.0.5-681a0f929505417757ba9f9981a50ab1d7c8a0e0" "-package-id" "ghc-prim-0.5.3" "-package-id" "hashable-1.2.7.0-50f89c5dee92df34fc2d6540cfde1983f26d8e31" "-package-id" "primitive-0.6.4.0-c08c185073660c1604acdddfe5c369afae583ba2" "-package-id" "scientific-0.3.6.2-4bea197b4523e02da61c34a1eed01432d9fefff6" "-package- id" "tagged-0.8.6-d3cce1acba663b646f565adb64d80579664d8caa" "-package-id" "template-haskell-2.14.0.0" "-package-id" "text-1.2.3.1" "-package-id" "th-abstraction-0.2.8.0-e197ba78a6de8bf8fc5d00ecb5a358a8b27bcc92" "-package-id" "time-1.8.0.2" "-package-id" "time-locale- c_-0.1.1.5-7549537073e62ce01921c89c30cc6cafeed99b5b" "-package-id" "unordered-con_-0.2.9.0-f5cd33176070f516c88b1aac3ef61959b09fcfa6" "-package-id" "uuid-types-1.0.3-f68643250767dce83d2c227104d15a0aa9c3c77f" "-package-id" "vector-0.12.0.1-3a9a26f81a463f0efefa41528af3e27d3a88cc7d" "-XHaskell2010" "Data.Aeson" "Data.Aeson.Encoding" "Data.Aeson.Parser" "Data.Aeson.Text" "Data.Aeson.Types" "Data.Aeson.TH" "Data.Aeson.QQ.Simple" "Data.Aeson.Encoding.Internal" "Data.Aeson.Internal" "Data.Aeson.Internal.Time" "Data.Aeson.Parser.Internal" "Data.Aeson.Encode" "Data.Aeson.Compat" "Data.Aeson.Encoding.Builder" "Data.Aeson.Internal.Functions" "Data.Aeson.Parser.Unescape" "Data.Aeson.Parser.Time" "Data.Aeson.Types.FromJSON" "Data.Aeson.Types.Generic" "Data.Aeson.Types.ToJSON" "Data.Aeson.Types.Class" "Data.Aeson.Types.Internal" "Data.Attoparsec.Time" "Data.Attoparsec.Time.Internal" "Data.Aeson.Parser.UnescapePure" "-Wall" "-O2" "-hide-all-packages" "-g13" [ 2 of 25] Compiling Data.Aeson.Internal.Functions ( Data\Aeson\Internal\Functions.hs, C:\ghc\msys64\home\Andi\aeson_repro \dist- newstyle\build\x86_64-windows\ghc-8.7.20181025\aeson-1.4.1.0\build\Data\Aeson\Internal\Functions.o ) [Data.HashMap.Strict changed] [ 5 of 25] Compiling Data.Aeson.Types.Generic ( Data\Aeson\Types\Generic.hs, C:\ghc\msys64\home\Andi\aeson_repro\dist- newstyle\build\x86_64-windows\ghc-8.7.20181025\aeson-1.4.1.0\build\Data\Aeson\Types\Generic.o ) [Prelude.Compat changed] [ 6 of 25] Compiling Data.Aeson.Types.Internal ( Data\Aeson\Types\Internal.hs, C:\ghc\msys64\home\Andi\aeson_repro\dist- newstyle\build\x86_64-windows\ghc-8.7.20181025\aeson-1.4.1.0\build\Data\Aeson\Types\Internal.o ) [Data.Vector changed] [ 7 of 25] Compiling Data.Aeson.Parser.Internal ( Data\Aeson\Parser\Internal.hs, C:\ghc\msys64\home\Andi\aeson_repro\dist- newstyle\build\x86_64-windows\ghc-8.7.20181025\aeson-1.4.1.0\build\Data\Aeson\Parser\Internal.o ) [Data.Scientific changed] [ 8 of 25] Compiling Data.Aeson.Parser ( Data\Aeson\Parser.hs, C:\ghc\msys64\home\Andi\aeson_repro\dist- newstyle\build\x86_64-windows\ghc-8.7.20181025\aeson-1.4.1.0\build\Data\Aeson\Parser.o ) [Data.Aeson.Parser.Internal changed] [ 9 of 25] Compiling Data.Attoparsec.Time.Internal ( attoparsec- iso8601\Data\Attoparsec\Time\Internal.hs, C:\ghc\msys64\home\Andi\aeson_repro\dist- newstyle\build\x86_64-windows\ghc-8.7.20181025\aeson-1.4.1.0\build\Data\Attoparsec\Time\Internal.o ) [Prelude.Compat changed] attoparsec-iso8601\Data\Attoparsec\Time\Internal.hs:24:1: warning: [-Wunused-imports] The import of `Unsafe.Coerce' is redundant except perhaps to import instances from `Unsafe.Coerce' To import instances alone, use: import Unsafe.Coerce() | 24 | import Unsafe.Coerce (unsafeCoerce) | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [10 of 25] Compiling Data.Attoparsec.Time ( attoparsec- iso8601\Data\Attoparsec\Time.hs, C:\ghc\msys64\home\Andi\aeson_repro\dist- newstyle\build\x86_64-windows\ghc-8.7.20181025\aeson-1.4.1.0\build\Data\Attoparsec\Time.o ) [Data.Attoparsec.Text changed] [11 of 25] Compiling Data.Aeson.Parser.Time ( Data\Aeson\Parser\Time.hs, C:\ghc\msys64\home\Andi\aeson_repro\dist- newstyle\build\x86_64-windows\ghc-8.7.20181025\aeson-1.4.1.0\build\Data\Aeson\Parser\Time.o ) [Data.Attoparsec.Text changed] [12 of 25] Compiling Data.Aeson.Types.FromJSON ( Data\Aeson\Types\FromJSON.hs, C:\ghc\msys64\home\Andi\aeson_repro\dist- newstyle\build\x86_64-windows\ghc-8.7.20181025\aeson-1.4.1.0\build\Data\Aeson\Types\FromJSON.o ) [Data.Primitive.PrimArray changed] [13 of 25] Compiling Data.Aeson.Internal ( Data\Aeson\Internal.hs, C:\ghc\msys64\home\Andi\aeson_repro\dist- newstyle\build\x86_64-windows\ghc-8.7.20181025\aeson-1.4.1.0\build\Data\Aeson\Internal.o ) [Data.Aeson.Types.FromJSON changed] [14 of 25] Compiling Data.Aeson.Internal.Time ( Data\Aeson\Internal\Time.hs, C:\ghc\msys64\home\Andi\aeson_repro\dist- newstyle\build\x86_64-windows\ghc-8.7.20181025\aeson-1.4.1.0\build\Data\Aeson\Internal\Time.o ) [Data.Attoparsec.Time.Internal changed] [15 of 25] Compiling Data.Aeson.Encoding.Builder ( Data\Aeson\Encoding\Builder.hs, C:\ghc\msys64\home\Andi\aeson_repro\dist- newstyle\build\x86_64-windows\ghc-8.7.20181025\aeson-1.4.1.0\build\Data\Aeson\Encoding\Builder.o ) [Data.Vector changed] [16 of 25] Compiling Data.Aeson.Encoding.Internal ( Data\Aeson\Encoding\Internal.hs, C:\ghc\msys64\home\Andi\aeson_repro\dist- newstyle\build\x86_64-windows\ghc-8.7.20181025\aeson-1.4.1.0\build\Data\Aeson\Encoding\Internal.o ) [Data.Scientific changed] [17 of 25] Compiling Data.Aeson.Encoding ( Data\Aeson\Encoding.hs, C:\ghc\msys64\home\Andi\aeson_repro\dist- newstyle\build\x86_64-windows\ghc-8.7.20181025\aeson-1.4.1.0\build\Data\Aeson\Encoding.o ) [Data.Aeson.Encoding.Internal changed] [18 of 25] Compiling Data.Aeson.Types.ToJSON ( Data\Aeson\Types\ToJSON.hs, C:\ghc\msys64\home\Andi\aeson_repro\dist- newstyle\build\x86_64-windows\ghc-8.7.20181025\aeson-1.4.1.0\build\Data\Aeson\Types\ToJSON.o ) [Data.Primitive.PrimArray changed] Access violation in generated code when executing data at 0x103fec440 Attempting to reconstruct a stack trace... Frame Code address * 0x845d9c0 0x103fec440 * 0x845da20 0x400c0f8 E:\ghc_dwarf\inplace\bin\ghc- stage2.exe+0x3c0c0f8 * 0x845da80 0x3fec9a1 E:\ghc_dwarf\inplace\bin\ghc- stage2.exe+0x3bec9a1 * 0x845dab0 0x3feca31 E:\ghc_dwarf\inplace\bin\ghc- stage2.exe+0x3beca31 * 0x845dab8 0x34c8934 E:\ghc_dwarf\inplace\bin\ghc- stage2.exe+0x30c8934 * 0x845dac0 0xfa340 * 0x845dac8 0x2a940b78 * 0x845dad0 0x2a98cd69 * 0x845dad8 0x2a98d7d0 CallStack (from HasCallStack): die', called at .\\Distribution\\Client\\ProjectOrchestration.hs:977:55 in main:Distribution.Client.ProjectOrchestration cabal.exe: Failed to build aeson-1.4.1.0-inplace. The build process terminated with exit code 11 }}} I could only reproduce it with master on Windows so far. It always triggers but under very specific circumstances: * GHC built with the flags above, adding dwarf info to the ghc executable or removing dwarf info eliminates the issue. * Only on a complete rebuild of aeson. Restarting the crashed build finishes without an error. -- Comment: Marking as high as we should try to get this into 8.8. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/15808#comment:4 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler