improve source mapping for member accesses

src/compiler.coffee

@@ -851,7 +851,18 @@ class exports.Compiler
  ]
  [CS.MemberAccessOp, CS.SoakedMemberAccessOp, ({expression, compile}) ->
  if hasSoak this then expr compile generateSoak this
- else memberAccess expression, @memberName
+ else
+ access = memberAccess expression, @memberName
+ # manually calculate raw/position info for member name
+ if @raw
+ access.property.raw = @memberName
+ access.property.line = @line
+ offset = @raw.length - @memberName.length
+ access.property.column = @column + offset - 1
+ access.property.offset = @offset + offset - 1
+ @column += @expression.raw.length
+ @offset += @expression.raw.length
+ access
  ]
  [CS.ProtoMemberAccessOp, CS.SoakedProtoMemberAccessOp, ({expression, compile}) ->
  if hasSoak this then expr compile generateSoak this

src/grammar.pegjs

@@ -214,7 +214,7 @@ var CS = require("./nodes"),
  var o = new F;
  // rather safely assumes access.op is returning non-Object
  access.op.apply(o, [left].concat(access.operands));
- return c(o.r(left.raw + access.raw), access);
+ return c(o.r(left.raw + access.raw), e);
  }, e, accesses);
  },
 

src/run.coffee

@@ -34,7 +34,7 @@ patchStackTrace = ->
  mapString = Module._sourceMaps[filename]?()
  if mapString
  sourceMap = sourceFiles[filename] ?= new SourceMapConsumer mapString
- sourceMap.originalPositionFor {line, column}
+ sourceMap.originalPositionFor {line, column: column - 1}
 
  frames = for frame in stack
  break if frame.getFunction() is exports.runMain

test/cli-eval-errors.coffee

@@ -10,7 +10,7 @@ suite 'Command line execution', ->
  eq stdout, "1 is main true\n0 is main false\n"
 
  ok stderr.indexOf("cli-eval-errors-files/0.coffee:3:26, <js>:4:9)") > 0
- ok stderr.indexOf("cli-eval-errors-files/1.coffee:4:6, <js>:6:9)") > 0
+ ok stderr.indexOf("cli-eval-errors-files/1.coffee:4:7, <js>:6:9)") > 0
 
  done()