{"header":{"message":"Add conversion from Error to Box\n","description":null,"timestamp":"2019-10-08T15:37:06Z","authors":[{"email":"dtolnay@gmail.com","name":"David Tolnay"}]},"hash":"RIKD63GT7RFV3UAV4BYD57GFXKXALWUP6J7AAHB3M6JVAZ3WFTXAC","authors":[],"deps":{"hashes":[["RIKD63GT7RFV3UAV4BYD57GFXKXALWUP6J7AAHB3M6JVAZ3WFTXAC","Add conversion from Error to Box\n"],["AA",null],["DI4CW2M46SOKHZXATOP6HRLZB3A33FCWRFDQBIJHJY2BEDB537NQC","Add Error::root_cause accessor\n"],["E54DU5UDWVAFMQOBDWIAXWUHXMPMZMWJI6RS7BHD74KULPP6AJRQC","Omit '0:' if only one cause\n"],["NPOFDGQF4CE72IZBT5Y7KPIBHWPPNOEPBYD5RTUHSVUJ2W4XFRVQC","Deallocate ErrorImpl with the right Layout\n"],["RERVQKZGW2CFKAPUKQPQAN6XSLFWFRKDOTJGBWZI2JIWGHQRWZAQC","Recommend RUST_LIB_BACKTRACE=1 variable\n"],["V2LGTLIQHXMNYYKNNHAOYFLM6S3IU3CSGJLDJBIKMF5UU32DZWVAC","Add example of Error::chain\n"],["BQU6MTEH6QEW5E2HX3F2AAZ54AHIVDVOEE7FTCQTPLO23U5ILFIQC","Rename Errors to Chain\n"],["YOIDJVXQ2EKVCLSHGTWH7I3MAWJKPEASTV5JAFZLQNZLI3LVSASQC","Touch up Debug impl for Error\n"],["G6C7MPYR535SR3WLKSOE3FCAX7LT7D7766RVRC76UW77LZBWRF5AC","Un-wrap backtrace disabled message for easier grepping\n"],["HHQUHNVMK5HPDJJ53MBD4IE2TDC3BMQOARPHRQAOO43AWG2LNMOAC","Wrap comments to 80 columns\n"],["2KK7KO4G4CG4CESDJBPFC2HTB4KPKKOBPOBIJCYCR5I2KNRFPQZAC","Indent causes in Debug representation with spaces\n"],["GZZOJ7ZUSBPI3HXIV5UCFNMCDAMZPPLISY2UDV73FDN74HZ3AWJAC","Format with rustfmt 2019-09-08\n"],["W655S25G7CGI4XOZ2PKITKTH26VJ4QMZFRV2RPYNI4KIUJOIGVMAC","Change all remaining exception related wording\n"],["ZDN7BJ3JA3VL4AYWX3SV24GHP6NCAETJVAKAXKMIZTLHTWLUNMOQC","Detect nightly and only expose backtrace if available\n"],["BH2E45KHBW7IX5SZ3Q5ARUILUWYVB3VIXS4BHTGS7W3I6DZGQYWQC","Capitalize lines of Debug representation\n"],["45AUHCDJX5A54AYFMJRGDHKMBQ3WYBIPAVPDPY7TCLK5WN5TSROQC","Move backtrace capture to backtrace module and macro\n"],["UM7DFUYLW4HSMBUDZY3R6ZNJRSX2E75C4DYV3MJAU57EUCGE6JLAC","Rename Exception to Error\n"],["CITEDKPB6MKVZUEYEDE5ZKTNVY35HCOAXKDPYG7YLLEOVFNMSRXQC","Import implementation from fehler 1.0.0-alpha.1\n"],["F5MLEQJFOB443KKN22TYYJN2TR52653MD4VXSEYZQBNWWJYES5VQC","Update vtable function names to match the implementation names\n"],["LX7EZ6TKJCQI3K7SV56WMTPFY672WN5UOBGXKKXQI7S73GMWNNXAC","Change Error::construct to unsafe fn because TypeId must be correct\n"],["T64LKJ2RTUDFYSJQI7KF4WHZYXZHNEGNOS7ZMMCRIQZ4YN5LOOMAC","Fix potential UB by removing reliance on trait object layout\n\nAdds a raw vtable object (similar to `RawWakerVTable`) that is manually\ncreated and has methods to dynamically cast to `dyn StdError`.\n"]],"deps":["DI4CW2M46SOKHZXATOP6HRLZB3A33FCWRFDQBIJHJY2BEDB537NQC","E54DU5UDWVAFMQOBDWIAXWUHXMPMZMWJI6RS7BHD74KULPP6AJRQC","NPOFDGQF4CE72IZBT5Y7KPIBHWPPNOEPBYD5RTUHSVUJ2W4XFRVQC"],"known":["CITEDKPB6MKVZUEYEDE5ZKTNVY35HCOAXKDPYG7YLLEOVFNMSRXQC","GZZOJ7ZUSBPI3HXIV5UCFNMCDAMZPPLISY2UDV73FDN74HZ3AWJAC","UM7DFUYLW4HSMBUDZY3R6ZNJRSX2E75C4DYV3MJAU57EUCGE6JLAC","W655S25G7CGI4XOZ2PKITKTH26VJ4QMZFRV2RPYNI4KIUJOIGVMAC","HHQUHNVMK5HPDJJ53MBD4IE2TDC3BMQOARPHRQAOO43AWG2LNMOAC","G6C7MPYR535SR3WLKSOE3FCAX7LT7D7766RVRC76UW77LZBWRF5AC","BQU6MTEH6QEW5E2HX3F2AAZ54AHIVDVOEE7FTCQTPLO23U5ILFIQC","RERVQKZGW2CFKAPUKQPQAN6XSLFWFRKDOTJGBWZI2JIWGHQRWZAQC","YOIDJVXQ2EKVCLSHGTWH7I3MAWJKPEASTV5JAFZLQNZLI3LVSASQC","ZDN7BJ3JA3VL4AYWX3SV24GHP6NCAETJVAKAXKMIZTLHTWLUNMOQC","V2LGTLIQHXMNYYKNNHAOYFLM6S3IU3CSGJLDJBIKMF5UU32DZWVAC","BH2E45KHBW7IX5SZ3Q5ARUILUWYVB3VIXS4BHTGS7W3I6DZGQYWQC","2KK7KO4G4CG4CESDJBPFC2HTB4KPKKOBPOBIJCYCR5I2KNRFPQZAC","45AUHCDJX5A54AYFMJRGDHKMBQ3WYBIPAVPDPY7TCLK5WN5TSROQC"]},"hunks":[{"Edit":{"inode":{"change":5,"pos":3238},"path":"src/error.rs","line":88,"atom":{"NewVertex":{"up_context":[{"change":20,"pos":90}],"down_context":[{"change":21,"pos":825}],"flag":"BLOCK","start":0,"end":45,"inode":{"change":5,"pos":3238}}},"contents":[{"Add":" object_boxed: object_boxed::,"}]}},{"Replacement":{"inode":{"change":5,"pos":3238},"path":"src/error.rs","line":178,"ins":{"up_context":[{"change":5,"pos":5603}],"down_context":[{"change":5,"pos":5914}],"flag":"BLOCK","start":46,"end":77,"inode":{"change":5,"pos":3238}},"del":{"edges":[{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":5,"pos":5603},"to":{"change":5,"start":328,"end":511},"introduced_by":5},{"previous":"","flag":"DELETED","from":{"change":5,"pos":511},"to":{"change":5,"start":1187,"end":1307},"introduced_by":5},{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":5,"pos":5775},"to":{"change":5,"start":1187,"end":1307},"introduced_by":5},{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":5,"pos":1307},"to":{"change":5,"start":179,"end":227},"introduced_by":5}],"inode":{"change":5,"pos":3238}},"ins_contents":[{"Add":" self.inner.backtrace()"}],"del_contents":[{"Del":" // NB: this unwrap can only fail if the underlying error's backtrace\n // method is nondeterministic, which would only happen in maliciously\n // constructed code\n"},{"Del":" self.inner\n .backtrace\n .as_ref()\n .or_else(|| self.inner.error().backtrace())\n"},{"Del":" .expect(\"backtrace capture failed\")\n"}]}},{"Replacement":{"inode":{"change":5,"pos":3238},"path":"src/error.rs","line":203,"ins":{"up_context":[{"change":5,"pos":190}],"down_context":[{"change":2,"pos":10}],"flag":"BLOCK","start":78,"end":105,"inode":{"change":5,"pos":3238}},"del":{"edges":[{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":5,"pos":190},"to":{"change":5,"start":190,"end":206},"introduced_by":5},{"previous":"","flag":"DELETED","from":{"change":5,"pos":206},"to":{"change":5,"start":1325,"end":1369},"introduced_by":5},{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":5,"pos":1325},"to":{"change":5,"start":1325,"end":1369},"introduced_by":5},{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":5,"pos":1369},"to":{"change":2,"start":0,"end":10},"introduced_by":2}],"inode":{"change":5,"pos":3238}},"ins_contents":[{"Add":" self.inner.chain()"}],"del_contents":[{"Del":" Chain {\n"},{"Del":" next: Some(self.inner.error()),\n"},{"Del":" }\n"}]}},{"Replacement":{"inode":{"change":5,"pos":3238},"path":"src/error.rs","line":332,"ins":{"up_context":[{"change":5,"pos":2060}],"down_context":[{"change":5,"pos":8834}],"flag":"BLOCK","start":106,"end":209,"inode":{"change":5,"pos":3238}},"del":{"edges":[{"previous":"","flag":"DELETED","from":{"change":5,"pos":2060},"to":{"change":5,"start":7923,"end":8030},"introduced_by":5},{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":5,"pos":7923},"to":{"change":5,"start":7923,"end":8030},"introduced_by":5},{"previous":"","flag":"DELETED","from":{"change":5,"pos":266},"to":{"change":5,"start":8091,"end":8092},"introduced_by":5},{"previous":"BLOCK","flag":"BLOCK | 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DELETED","from":{"change":5,"pos":8232},"to":{"change":5,"start":108,"end":146},"introduced_by":5},{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":5,"pos":146},"to":{"change":5,"start":51,"end":105},"introduced_by":5},{"previous":"","flag":"DELETED","from":{"change":5,"pos":105},"to":{"change":5,"start":8323,"end":8348},"introduced_by":5},{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":5,"pos":8323},"to":{"change":5,"start":8323,"end":8348},"introduced_by":5},{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":5,"pos":8348},"to":{"change":5,"start":1310,"end":1346},"introduced_by":5},{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":5,"pos":1346},"to":{"change":5,"start":347,"end":397},"introduced_by":5},{"previous":"","flag":"DELETED","from":{"change":5,"pos":397},"to":{"change":5,"start":1346,"end":1653},"introduced_by":5},{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":5,"pos":1346},"to":{"change":5,"start":1346,"end":1653},"introduced_by":5},{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":5,"pos":1653},"to":{"change":5,"start":57,"end":179},"introduced_by":5},{"previous":"","flag":"DELETED","from":{"change":5,"pos":179},"to":{"change":5,"start":1775,"end":1841},"introduced_by":5},{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":5,"pos":1775},"to":{"change":5,"start":1775,"end":1841},"introduced_by":5},{"previous":"","flag":"DELETED","from":{"change":5,"pos":1763},"to":{"change":5,"start":8743,"end":8757},"introduced_by":5},{"previous":"","flag":"DELETED","from":{"change":5,"pos":1841},"to":{"change":5,"start":8743,"end":8757},"introduced_by":5},{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":5,"pos":8743},"to":{"change":5,"start":8743,"end":8757},"introduced_by":5},{"previous":"","flag":"DELETED","from":{"change":5,"pos":1784},"to":{"change":5,"start":8808,"end":8834},"introduced_by":5},{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":5,"pos":8808},"to":{"change":5,"start":8808,"end":8834},"introduced_by":5}],"inode":{"change":5,"pos":3238}},"ins_contents":[{"Add":" fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {"},{"Add":" self.inner.debug(formatter)"}],"del_contents":[{"Del":" fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {\n writeln!(f, \"{}\", self.inner.error())?;\n"},{"Del":"\n"},{"Del":" let mut chain = self.chain().skip(1).enumerate().peekable();\n"},{"Del":" if let Some((n, error)) = chain.next() {\n"},{"Del":" write!(f, \"\\nCaused by:\\n \")?;\n if chain.peek().is_some() {\n write!(f, \"{}: \", n)?;\n }\n writeln!(f, \"{}\", error)?;\n"},{"Del":" for (n, error) in chain {\n"},{"Del":" writeln!(f, \" {}: {}\", n, error)?;\n"},{"Del":" }\n }\n\n"},{"Del":" #[cfg(backtrace)]\n {\n"},{"Del":" use std::backtrace::BacktraceStatus;\n\n"},{"Del":" let backtrace = self.backtrace();\n match backtrace.status() {\n BacktraceStatus::Captured => {\n writeln!(f, \"\\n{}\", backtrace)?;\n }\n BacktraceStatus::Disabled => {\n writeln!(\n f,\n"},{"Del":" \"\\nBacktrace disabled; run with RUST_LIB_BACKTRACE=1 environment variable to display a backtrace\"\n"},{"Del":" )?;\n }\n _ => {}\n"},{"Del":" }\n"},{"Del":" }\n\n Ok(())\n"}]}},{"Edit":{"inode":{"change":5,"pos":3238},"path":"src/error.rs","line":361,"atom":{"NewVertex":{"up_context":[{"change":20,"pos":251}],"down_context":[{"change":4,"pos":520}],"flag":"BLOCK","start":210,"end":304,"inode":{"change":5,"pos":3238}}},"contents":[{"Add":" object_boxed: unsafe fn(Box>) -> Box,"}]}},{"Edit":{"inode":{"change":5,"pos":3238},"path":"src/error.rs","line":391,"atom":{"NewVertex":{"up_context":[{"change":22,"pos":671}],"down_context":[{"change":22,"pos":671}],"flag":"BLOCK","start":305,"end":514,"inode":{"change":5,"pos":3238}}},"contents":[{"Add":"}"},{"Add":""},{"Add":"unsafe fn object_boxed(e: Box>) -> Box"},{"Add":"where"},{"Add":" E: StdError + Send + Sync + 'static,"},{"Add":"{"},{"Add":" mem::transmute::>, Box>>(e)"}]}},{"Edit":{"inode":{"change":5,"pos":3238},"path":"src/error.rs","line":462,"atom":{"NewVertex":{"up_context":[{"change":20,"pos":383}],"down_context":[{"change":5,"pos":10435}],"flag":"BLOCK","start":515,"end":908,"inode":{"change":5,"pos":3238}}},"contents":[{"Add":" }"},{"Add":""},{"Add":" #[cfg(backtrace)]"},{"Add":" fn backtrace(&self) -> &Backtrace {"},{"Add":" // This unwrap can only panic if the underlying error's backtrace method"},{"Add":" // is nondeterministic, which would only happen in maliciously"},{"Add":" // constructed code."},{"Add":" self.backtrace"},{"Add":" .as_ref()"},{"Add":" .or_else(|| self.error().backtrace())"},{"Add":" .expect(\"backtrace capture failed\")"}]}},{"Edit":{"inode":{"change":5,"pos":3238},"path":"src/error.rs","line":474,"atom":{"NewVertex":{"up_context":[{"change":5,"pos":10441}],"down_context":[{"change":5,"pos":10441}],"flag":"BLOCK","start":909,"end":2979,"inode":{"change":5,"pos":3238}}},"contents":[{"Add":""},{"Add":" fn chain(&self) -> Chain {"},{"Add":" Chain {"},{"Add":" next: Some(self.error()),"},{"Add":" }"},{"Add":" }"},{"Add":""},{"Add":" fn debug(&self, f: &mut fmt::Formatter) -> fmt::Result {"},{"Add":" writeln!(f, \"{}\", self.error())?;"},{"Add":""},{"Add":" let mut chain = self.chain().skip(1).enumerate().peekable();"},{"Add":" if let Some((n, error)) = chain.next() {"},{"Add":" write!(f, \"\\nCaused by:\\n \")?;"},{"Add":" if chain.peek().is_some() {"},{"Add":" write!(f, \"{}: \", n)?;"},{"Add":" }"},{"Add":" writeln!(f, \"{}\", error)?;"},{"Add":" for (n, error) in chain {"},{"Add":" writeln!(f, \" {}: {}\", n, error)?;"},{"Add":" }"},{"Add":" }"},{"Add":""},{"Add":" #[cfg(backtrace)]"},{"Add":" {"},{"Add":" use std::backtrace::BacktraceStatus;"},{"Add":""},{"Add":" let backtrace = self.backtrace();"},{"Add":" match backtrace.status() {"},{"Add":" BacktraceStatus::Captured => {"},{"Add":" writeln!(f, \"\\n{}\", backtrace)?;"},{"Add":" }"},{"Add":" BacktraceStatus::Disabled => {"},{"Add":" writeln!("},{"Add":" f,"},{"Add":" \"\\nBacktrace disabled; run with RUST_LIB_BACKTRACE=1 environment variable to display a backtrace\""},{"Add":" )?;"},{"Add":" }"},{"Add":" _ => {}"},{"Add":" }"},{"Add":" }"},{"Add":""},{"Add":" Ok(())"},{"Add":" }"},{"Add":"}"},{"Add":""},{"Add":"impl StdError for ErrorImpl where E: StdError {}"},{"Add":""},{"Add":"impl Debug for ErrorImpl"},{"Add":"where"},{"Add":" E: Debug,"},{"Add":"{"},{"Add":" fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {"},{"Add":" let erased = unsafe { &*(self as *const ErrorImpl as *const ErrorImpl<()>) };"},{"Add":" erased.debug(formatter)"},{"Add":" }"},{"Add":"}"},{"Add":""},{"Add":"impl Display for ErrorImpl"},{"Add":"where"},{"Add":" E: Display,"},{"Add":"{"},{"Add":" fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {"},{"Add":" Display::fmt(&self.error, formatter)"},{"Add":" }"},{"Add":"}"},{"Add":""},{"Add":"impl From for Box {"},{"Add":" fn from(error: Error) -> Self {"},{"Add":" let outer = ManuallyDrop::new(error);"},{"Add":" unsafe {"},{"Add":" let inner = ptr::read(&outer.inner);"},{"Add":" let erased = ManuallyDrop::into_inner(inner);"},{"Add":" (erased.vtable.object_boxed)(erased)"},{"Add":" }"},{"Add":" }"}]}}],"owner":"yaahc","repo":"eyre","token":"qNT3XhGs93FbgLnAfp0ZG2av9kCNP7QwgubnWSNAXX8=","login":null}

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