GitHub user JoshRosen opened a pull request:

    https://github.com/apache/spark/pull/15156

    [SPARK-17160] Properly escape field names in code generation error messages

    This patch addresses a corner-case escaping bug where field names which 
contain special characters were unsafely interpolated into error message string 
literals in generated Java code, leading to compilation errors.
    
    This patch addresses these issues by using `addReferenceObj` to store the 
error messages as string fields rather than inline string constants.

You can merge this pull request into a Git repository by running:

    $ git pull https://github.com/JoshRosen/spark SPARK-17160

Alternatively you can review and apply these changes as the patch at:

    https://github.com/apache/spark/pull/15156.patch

To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

    This closes #15156
    
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commit 512c114ec6198e67cfb168e35906a53f6b0b425c
Author: Josh Rosen <joshro...@databricks.com>
Date:   2016-09-19T21:15:49Z

    Add regression test for SPARK-17160

commit 39eeed4a33e935b30662bdd6f8b366b88f270db9
Author: Josh Rosen <joshro...@databricks.com>
Date:   2016-09-19T21:16:08Z

    Fix SPARK-17160 via additional escaping.

commit 1430068f7b1f361a09fc0f18fd7e996f797f7c47
Author: Josh Rosen <joshro...@databricks.com>
Date:   2016-09-19T22:05:20Z

    Add regression test for similar bug in AssertTrue

commit 39e2e026de5b913f2d50869f68ff3d8fe80a8367
Author: Josh Rosen <joshro...@databricks.com>
Date:   2016-09-19T22:14:14Z

    Fix using codegen context references.

commit 453470527d065ad6895cd728bfbc0eec6928bf36
Author: Josh Rosen <joshro...@databricks.com>
Date:   2016-09-19T22:18:47Z

    Similar fix in PrintToStderr

commit 17a9fced0409d18df371256b6dabe0493e501d85
Author: Josh Rosen <joshro...@databricks.com>
Date:   2016-09-19T22:22:01Z

    Use same fix for GetExternalRowField

commit 35b62d590e8995aa08b8c494d104ba6ff5f6e801
Author: Josh Rosen <joshro...@databricks.com>
Date:   2016-09-19T22:26:24Z

    Similar change in ValidateExternalType

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